AMENDMENT 13 JUNE 2001 FIRE PROTECTION ...4.14 Radwaste Building (Fire Zones 14.1, 14.5, and 14.6)...
Transcript of AMENDMENT 13 JUNE 2001 FIRE PROTECTION ...4.14 Radwaste Building (Fire Zones 14.1, 14.5, and 14.6)...
AMENDMENT 13 JUNE 2001
DRESDEN 2 & 3
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FIRE PROTECTION REPORTS
Volume Index
VOLUME 1 – Updated Fire Hazards Analysis VOLUME 2 – Appendix R Conformance (Sections III.G, III.J, and III.L) – Safe Shutdown Report VOLUME 3 – Technical Specifications, Technical Requirements, and Inspection Reports VOLUME 4 – Interim Measures/Exemption Requests VOLUME 5 – Safety Evaluation Reports
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FIRE PROTECTION REPORTS
Volume Index
VOLUME 2 – APPENDIX R CONFORMANCE (SECTIONS III.G, III.J AND III.L) SAFE SHUTDOWN REPORT
1. Introduction
2. Identification of Fire Areas
3. Methodology and Selection of Appendix R Safe Shutdown Functions, Systems, and Components and their Associated Circuits
4. Safe Shutdown Analysis
5. Supporting Associated Circuits Analysis
6. Modifications
7. Safe Shutdown Procedures
A. Hot Shutdown Cable Discrepancies for Dresden Units 2 and 3
B. Potential Spurious Component Operations that Could Affect Safe Shutdown – Dresden 2 and 3
AMENDMENT 23 JUNE 2021
DRESDEN 2 & 3
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SAFE SHUTDOWN REPORT
August 1985
(Original Issue) Amendment 13
(June 2001) Amendment 1 (January 1986)
Amendment 14 (June 2003)
Amendment 2 (February 1986)
Amendment 15 (June 2005)
Amendment 3 (July 1986)
Amendment 16 (June 2007)
Amendment 4 (March 1987)
Amendment 17 (June 2009)
Amendment 5 (August 1987)
Amendment 18 (June 2011)
Amendment 6 & 7 (Numbers not used)
Amendment 19 (June 2013)
Amendment 8 May 1990, April 1992
(Used for correlation between Safe Shutdown Report and Fire Hazards Analysis Amendment
Numbers and Dates)
Amendment 20
(June 2015)
Amendment 9 (July 1993)
Amendment 21 (June 2017)
Amendment 10 (December 1994)
Amendment 22 (June 2019)
Amendment 11 (June 1998)
Amendment 23 (June 2021)
Amendment 12 (March 1999)
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TABLE OF CONTENTS
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1.0 INTRODUCTION 1.1-1
1.1 Objective 1.1-1 1.1.1 Development of the 1985 Safe Shutdown Report 1.1-2 1.2 Safe Shutdown Functions and Assumptions 1.2-1 1.3 Report Overview 1.3-1 1.4 Background 1.4-1 1.5 Governing Regulatory Guidelines 1.5-1
2.0 IDENTIFICATION OF FIRE AREAS 2.1-1
2.1 Zone Interaction Analysis Procedure 2.1-1 2.2 Fire Area Descriptions 2.2-1 2.2.1 Fire Area RB2-I 2.2-1 2.2.2 Fire Area RB2-II 2.2-2 2.2.3 Fire Area - Unit 2 Primary Containment 2.2-3 2.2.4 Fire Area RB3-I 2.2-3 2.2.5 Fire Area RB3-II 2.2-4 2.2.6 Fire Area - Unit 3 Primary Containment 2.2-5 2.2.7 Fire Area RB-2/3 2.2-6 2.2.8 Fire Area TB-I 2.2-6 2.2.9 Fire Area TB-II 2.2-8 2.2.10 Fire Area TB-III 2.2-8 2.2.11 Fire Area TB-IV 2.2-10 2.2.12 Fire Area TB-V 2.2-11 2.2.13 Crib House Fire Area 2.2-11 2.2.14 Radwaste Building Fire Area 2.2-11 2.2.15 Miscellaneous Outside Structures 2.2-12 3.0 METHODOLOGY AND SELECTION OF APPENDIX R SAFE
SHUTDOWN FUNCTIONS, SYSTEMS, AND COMPONENTS AND THEIR ASSOCIATED CIRCUITS
3.1-1
3.1 Description of Methods and Paths to Achieve and Maintain Hot Shutdown
3.1-1
3.1.1 Hot Shutdown Methods 3.1-1 3.1.1.1 Isolation Condenser Method 3.1-1 3.1.1.1.1 Reactivity Control 3.1-1 3.1.1.1.2 Reactor Coolant Makeup 3.1-2 3.1.1.1.3 Reactor Pressure Control and Decay Heat Removal 3.1-3 3.1.1.1.4 Suppression Pool Cooling 3.1-4 3.1.1.1.5 Process Monitoring Instrumentation 3.1-5 3.1.1.1.6 Support 3.1-5 3.1.1.2 High Pressure Coolant Injection (HPCI) Method 3.1-7 3.1.1.2.1 Reactivity Control 3.1-7
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3.1.1.2.2 Reactor Coolant Makeup 3.1-7 3.1.1.2.3 Reactor Pressure Control and Decay Heat Removal 3.1-8 3.1.1.2.4 Suppression Pool Cooling 3.1-8 3.1.1.2.5 Process Monitoring Instrumentation 3.1-8 3.1.1.2.6 Support 3.1-9 3.1.1.2.6.1 HVAC Systems 3.1-9 3.1.2 Description of Hot Shutdown Paths 3.1-10 3.1.2.1 Shutdown Path A 3.1-10 3.1.2.2 Alternative Shutdown Path A1 3.1-10 3.1.2.3 Alternative Shutdown Path A2 3.1-10 3.1.2.4 Shutdown Path B 3.1-11 3.1.2.5 Alternative Shutdown Path B1 3.1-11 3.1.2.6 Alternative Shutdown Path B2 3.1-12 3.1.2.7 Shutdown Path C 3.1-12 3.1.2.8 Shutdown Path D 3.1-12 3.1.2.9 Shutdown Path E 3.1-13 3.1.2.10 Shutdown Path F 3.1-13 3.2 Description of Methods to Achieve and Maintain Cold Shutdown 3.2-1 3.2.1 Shutdown Cooling Method 3.2-2 3.2.1.1 Reactor Pressure Control and Decay Heat Removal 3.2-2 3.2.1.2 Suppression Pool Cooling 3.2-3 3.2.1.3 Process Monitoring Instrumentation 3.2-3 3.2.1.3.1 Reactor Water Level and Pressure 3.2-3 3.2.1.3.2 Suppression Pool Level and Temperature 3.2-3 3.2.1.3.3 Diagnostic Instrumentation for Shutdown Systems 3.2-3 3.2.1.4 Support Functions 3.2-4 3.2.2 LPCI/CCSW Division II Method 3.2-5 3.2.2.1 Reactor Pressure Control and Decay Heat Removal 3.2-5 3.2.2.2 Suppression Pool Cooling 3.2-6 3.2.2.3 Process Monitoring Instrumentation 3.2-6 3.2.2.3.1 Reactor Level and Pressure 3.2-6 3.2.2.3.2 Suppression Pool Level and Temperature 3.2-7 3.2.2.3.3 Diagnostic Instrumentation for Shutdown Systems 3.2-7 3.2.2.4 Support Systems 3.2-7 3.3 Associated Circuits 3.3-1 3.3.1 Assumptions for Circuit Failures 3.3-2 3.3.2 Common Power Source 3.3-3 3.3.3 Common Enclosure 3.3-3 3.3.4 Spurious Operation 3.3-3 4.0 SAFE SHUTDOWN ANALYSIS 4.0-1
4.1 Unit 2 Reactor Building Fire Area RB2-I 4.1-1 4.1.1 Hot Shutdown Analysis 4.1-1
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4.1.2 Cold Shutdown Analysis 4.1-1 4.2 Unit 2 Reactor Building Fire Area RB2-II 4.2-1 4.2.1 Hot Shutdown Analysis 4.2-1 4.2.2 RB2-I and RB2-II Cold Shutdown Analysis 4.2-2 4.3 Unit 2 Primary Containment (Fire Area 1.2.2) 4.3-1 4.3.1 Hot Shutdown Analysis 4.3-1 4.3.2 Cold Shutdown Analysis 4.3-1 4.4 Unit 3 Reactor Building Fire Area RB3-I 4.4-1 4.4.1 Hot Shutdown Analysis 4.4-1 4.4.2 Cold Shutdown Analysis 4.4-1 4.5 Unit 3 Reactor Building Fire Area RB3-II 4.5-1 4.5.1 Hot Shutdown Analysis 4.5-1 4.5.2 RB3-I and RB3-II Cold Shutdown Analysis 4.5-2 4.6 Unit 3 Primary Containment (Fire Area 1.2.1) 4.6-1 4.6.1 Hot Shutdown Analysis 4.6-1 4.6.2 Cold Shutdown Analysis 4.6-1 4.7 2/3 Diesel Generator and HPCI Rooms (Fire Area RB-2/3) 4.7-1 4.7.1 Hot Shutdown Analysis 4.7-1 4.7.2 Cold Shutdown Analysis 4.7-1 4.8 Turbine Building Eastern Zone Group (Fire Area TB-I) 4.8-1 4.8.1 Hot Shutdown Analysis 4.8-1 4.8.2 Cold Shutdown Analysis 4.8-3 4.9 Turbine Building Central Zone Group (Fire Area TB-II) 4.9-1 4.9.1 Hot Shutdown Analysis 4.9-1 4.9.2 Cold Shutdown Analysis 4.9-3 4.10 Turbine Building Western Zone Group (Fire Area TB-III) 4.10-1 4.10.1 Hot Shutdown Analysis 4.10-1 4.10.2 Cold Shutdown Analysis 4.10-2 4.11 Turbine Building Main Floor (Fire Areas TB-IV) 4.11-1 4.11.1 Hot Shutdown Analysis 4.11-1 4.11.2 Cold Shutdown Analysis 4.11-1 4.12 Control Room and AEER (Fire Area TB-V) 4.12-1 4.12.1 Hot Shutdown Analysis 4.12-1 4.12.2 Cold Shutdown Analysis 4.12-2 4.13 Crib House Fire Area 11.3 4.13-1 4.13.1 Hot Shutdown Analysis 4.13-1 4.13.2 Cold Shutdown Analysis 4.13-2 4.14 Radwaste Building (Fire Zones 14.1, 14.5, and 14.6) 4.14-1 4.15 Miscellaneous Structures 4.15-1 4.15.1 Dresden Units 2 & 3 Safe Shutdown Analysis for a Dresden Unit
1 Fire 4.15-1
4.15.2 Isolation Condenser Makeup Pump Rooms (Fire Zones 18.7.1 and 18.7.2)
4.15-2
5.0 SUPPORTING ASSOCIATED CIRCUITS ANALYSIS 5.1-1
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5.1 Valve Spurious Operation Analysis 5.1-1 5.1.1 Methodology 5.1-1 5.1.2 Results 5.1-2 5.2 Spurious Breaker Operation Analysis 5.2-1 5.3 Current Transformers/Control Power Transformer Analysis 5.3-1 5.3.1 Control Power Transformers 5.3-1 5.3.2 Current Transformers 5.3-1 5.4 Redundant Fusing of Control Circuits Analysis (IE Information
Notice 85-09) 5.4-1
5.5 Coordinated Fault Protection Analysis 5.5-1
6.0 MODIFICATIONS 6.1-1
6.1 Introduction 6.1-1 6.2 Safe Shutdown System Modifications 6.2-1 6.2.1 Unit 2 Safe Shutdown System Modifications 6.2-1 6.2.1.1 Provide Local Isolation Condenser Water Level Indication 6.2-1 6.2.1.2 Provide Local Breaker Control 6.2-1 6.2.1.3 Provide Local Control for Condensate Transfer Pump 2A 6.2-2 6.2.1.4 Provide Alternate Power Feeds to Inboard Isolation Condenser
Valves 6.2-2
6.2.1.5 Deleted 6.2-3 6.2.1.6 Provide Access to Valves in Isolation Condenser Pipe Chase 6.2-3 6.2.1.7 Provide Secondary CRD Pump Cooling Water 6.2-3 6.2.1.8 Provide Inhibit Switch for Auto Blowdown 6.2-4 6.2.2 Unit 3 Safe Shutdown System Modifications 6.2-4 6.2.2.1 Provide Local Isolation Condenser Water Level Indication 6.2-4 6.2.2.2 Provide Local Breaker Control 6.2-5 6.2.2.3 Provide Local Control for Condensate Transfer Pump 3A 6.2-5 6.2.2.4 Provide Alternate Power Feeds to Inboard Isolation Condenser
Valves 6.2-6
6.2.2.5 Deleted 6.2-7 6.2.2.6 Provide Access to Valves in Isolation Condenser Pipe Chase 6.2-7 6.2.2.7 Provide Secondary CRD Pump Cooling Water 6.2-7 6.2.2.8 Provide Inhibit Switch for Auto Blowdown 6.2-7 6.2.3 Units 2 and 3 Safe Shutdown System Modifications 6.2-8 6.2.3.1 2/3 Diesel Generator System Modifications 6.2-8 6.2.3.1.1 Bifurcate 2/3 Diesel Generator Bus Duct 6.2-8 6.2.3.1.2 Electrically Isolate 2/3 Diesel Generator and Auxiliaries 6.2-8 6.2.3.1.3 Relocated Local Control Station for MCC 38-1 Main Feed 6.2-9 6.2.3.1.4 Install Transfer Switch for 2/3 Diesel Generator Auxiliaries 6.2-9 6.2.3.1.5 Reroute Unit 2 Cables for the 2/3 Diesel Generator and
Auxiliaries 6.2-10
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6.2.3.1.6 Modification to 2/3 Diesel Generator Breakers Feeding 4-kV SWGR
6.2-10
6.2.3.2 CRD Pump Discharge Header Crosstie Piping 6.2-10 6.2.3.3 Provide Air Vent Valves for the MSIV Air Lines 6.2-11 6.2.4 Modifications to Provide Access to Valves for Cold Shutdown 6.2-11 6.2.5 Deleted 6.2-11 6.3 Fire Protection System Modifications 6.3-1 6.3.1 Unit 2 Reactor Building Fire Protection System Modifications 6.3-1 6.3.1.1 Provide Fire Detection in Unit 2 Reactor Building 6.3-1 6.3.1.2 Upgrade Fire Barriers in Unit 2 Reactor Building 6.3-3 6.3.1.2.1 Modifications to Barriers Separating Fire Areas RB2-I and RB2-II 6.3-3 6.3.1.2.2 Modifications to Barriers Separating Fire Areas RB2-II and RB-
2/3 6.3-6
6.3.1.3 Provide Protection for Cables in the Unit 2 Reactor Building 6.3-6 6.3.2 Unit 3 Reactor Building Fire Protection System Modifications 6.3-7 6.3.2.1 Provide Fire Detection in the Unit 3 Reactor Building 6.3-7 6.3.2.2 Upgrade Fire Barriers in the Unit 3 Reactor Building 6.3-9 6.3.2.2.1 Modifications to Barriers Separating Fire Areas RB3-I and RB3-II 6.3-9 6.3.2.2.2 Modification to Barriers Separating Fire Areas RB3-II and RB-2/3 6.3-11 6.3.2.2.3 Modifications to Barriers Separating Fire Zone 1.3.1 from Fire
Area RB3-II 6.3-12
6.3.2.3 Provide Protection for Cables in the Unit 3 Reactor Building 6.3-12 6.3.3 Unit 2 and Unit 3 Reactor Buildings Fire Protection System
Modifications 6.3-13
6.3.3.1 Upgrade Barrier Between Unit 2 and Unit 3 Reactor Buildings 6.3-13 6.3.3.2 Protect the 2/3 Diesel Generator Unit 2 Bus Duct in the Unit 3
Reactor Building with 1-Hour Barrier 6.3-13
6.3.3.3 Protect Unit 2 Power and Control Cables for the 2/3 Diesel Generator and Auxiliaries in the Unit 3 Reactor Building with 1-Hour Barrier
6.3-13
6.3.4 Units 2 and 3 Turbine Building Fire Protection System Modifications
6.3-14
6.3.4.1 Provide Additional Fire Detection and Suppression Systems on the Ground and Mezzanine Floor Levels of the Turbine Building
6.3-14
6.3.4.2 Provide Fire Suppression System on Unit 3 CRD Pump Floor 6.3-14 6.3.4.3 Seal All Penetrations to Fire Area TB-V 6.3-14 6.3.4.4 Protect Cable Tray in Ground Floor Access Corridor with 1-Hour
Fire Barrier 6.3-15
6.3.4.5 Protect Cable Risers Adjacent to TB-V 6.3-15
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6.3.5 Unit 2 and Unit 3 Crib House Fire Protection System Modifications
6.3-15
6.3.5.1 Protect 2/3 Diesel Generator Cooling Water Pump Transfer Switch with 1-Hour Barrier
6.3-15
6.3.5.2 Provide Automatic Suppression and Detection Systems and Curbing in the Lower Level of Crib House
6.3-16
6.3.5.3 Provide Curbing and Automatic Suppression in the Upper Level of the Crib House
6.3-17
7.0 SAFE SHUTDOWN PROCEDURES 7.1-1
7.1 Introduction 7.1-1 7.2 Timelines and Manpower Requirements 7.2-1 7.2.1 Timelines 7.2-1 7.2.1.1 HPCI 7.2-1 7.2.1.2 Isolation Condenser 7.2-1 7.2.2 Manpower 7.2-1 7.3 Procedures Relevant to Hot Shutdown 7.3-1 7.4 Procedures Relevant to Cold Shutdown 7.4-1 7.4.1 Procedures 7.4-1 7.4.1.1 Dresden 2&3 Cold Shutdown Loads Requiring Temporary Cable
Connections 7.4-2
7.4.1.2 Control System Repair Procedures 7.4-3 7.4.1.3 Specific Repairs and Manual Actions Potentially Required for
Cold Shutdown 7.4-3
7.4.1.4 4-kV Breakers to be Used for Temporary Feeds 7.4-5 7.4.2 Materials Needed 7.4-6 7.5 Emergency Lighting 7.5-1 7.6 Communication Capabilities 7.6-1 7.6.1 Effects of Fire on Each Communication System 7.6.1 7.6.1.1 PA System 7.6-1 7.6.1.2 PBX 7.6-1 7.6.1.3 Sound Power Phones 7.6-2 7.6.1.4 Radio 7.6-2 7.6.2 Communication System Availability in the Event of a fire 7.6-3 7.7 Access to Safe Shutdown Equipment 7.7-1 7.7.1 Secondary Containment Airlock Doors 7.7-1 7.7.2 Security Doors 7.7-1 7.7.3 High Radiation Area Doors 7.7-1 7.7.4 Miscellaneous Locked Doors 7.7-2 APPENDIX A Hot Shutdown Cable Discrepancies for Dresden Units 2 and 3 A-1 APPENDIX B Potential Spurious Component Operations that Could Affect Safe
Shutdown - Dresden Units 2 and 3 B-1
AMENDMENT 16 JUNE 2007
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SAFE SHUTDOWN REPORT
LIST OF TABLES
NUMBER TITLE PAGE
2.1-1 Appendix R Shutdown Paths by Fire Zone 2.1-3 3.1-1 Diesel Generator (1) Loading for Hot Safe Shutdown(2)(4) 3.1-14 3.1-2 Outline of Appendix R Shutdown Paths 3.1-15 3.1-3 Components Required for Alternative Shutdown Path A 3.1-16 3.1-4 Components Required for Alternative Shutdown Path A1 3.1-20 3.1-5 Components Required for Alternative Shutdown Path A2/B2 3.1-24 3.1-6 Components Required for Alternative Shutdown Path B 3.1-29 3.1-7 Components Required for Alternative Shutdown Path B1 3.1-33 3.1-8 Components Required for Alternative Shutdown Path C 3.1-37 3.1-9 Components Required for Alternative Shutdown Path D 3.1-40 3.1-10 Components Required for Alternative Shutdown Path E 3.1-43 3.1-11 Components Required for Alternative Shutdown Path F 3.1-47 3.2-1 Shutdown Cooling Method – Cold Shutdown Equipment 3.2-9 3.2-2 Shutdown Cooling Method – Power Distribution Equipment 3.2-11 3.2-3 Shutdown Cooling Method (1)(2) – Diesel Generator Loading for Cold
Shutdown 3.2-13
3.2-4 LPCI/CCSW Division II Method - Cold Shutdown Equipment 3.2-14 3.2-5 LPCI/CCSW Division II Method - Power Distribution Equipment 3.2-17 3.2-6 LPCI/CCSW Division II Method (1)(2) - Diesel Generator Loading for
Cold Shutdown 3.2-19
4.0-1 Appendix R Hot Shutdown Paths by Fire Zone 4.0-2 4.2-1 Cold Shutdown Equipment Contained in the Unit 2 Reactor Building
Fire Areas RB2-I and RB2-II 4.2-5
4.2-2 Actions to Achieve Cold Shutdown in Unit 2 Using the Shutdown Cooling System Assuming a Fire in the Unit 2 Reactor Building
4.2-8
4.2-3 Actions to Achieve Cold Shutdown in Unit 2 Using the LPCI/CCSW System Assuming a Fire in the Unit 2 Reactor Building
4.2-11
4.3-1 Cold Shutdown Equipment Contained in the Drywell 4.3-2 4.5-1 Cold Shutdown Equipment Contained in the Unit 3 Reactor Building
Fire Areas RB3-I and RB3-II 4.5-5
4.5-2 Actions to Achieve Cold Shutdown in Unit 3 Using the Shutdown Cooling System Assuming a Fire in the Unit 3 Reactor Building
4.5-8
4.5-3 Actions to Achieve Cold Shutdown in Unit 3 Using the LPCI/CCSW System Assuming a Fire in the Unit 3 Reactor Building
4.5-10
4.7-1 Cold Shutdown Equipment Contained in Fire Area RB-2/3 4.7-2 4.8-1 Cold Shutdown Equipment Contained in Fire Area TB-I 4.8-4 4.8-2 Actions to Achieve Cold Shutdown in Unit 2 Using the Shutdown
Cooling System Assuming a Fire in Fire Area TB-I 4.8-6
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SAFE SHUTDOWN REPORT LIST OF TABLES 4.9-1 Cold Shutdown Equipment Contained in Fire Area TB-II 4.9-4 4.9-2 Actions to Achieve Cold Shutdown in Units 2&3 Using the Shutdown
Cooling System Assuming a Fire in Fire Area TB-II 4.9-5
4.10-1 Cold Shutdown Equipment in the Western Zone Group 4.10-3 4.10-2 Actions to Achieve Cold Shutdown in Unit 3 Using the Shutdown
Cooling System Assuming a Fire in Fire Area TB-III 4.10-5
4.12-1 Cold Shutdown Equipment Contained in Fire Area TB-V 4.12-3 4.12-2 Actions to Achieve Cold Shutdown in Units 2 and 3 Using the
Shutdown Cooling System Assuming a Fire in Fire Area TB-V 4.12-4
4.13-1 Cold Shutdown Equipment Contained in the Crib House 4.13-4 5.1-1 Potential Spurious Valve Operations That Could Affect Safe Shutdown
For Which a Prefire or Postfire Action Was Necessary 5.1-3
5.4-1 List of Circuits per IEIN 85-09 Concerns Which May Require Manual Action Following a Fire
5.4-2
6.1-1 Completion Schedule For Identified Modifications 6.1-2 7.3-1 Manual Actions Inherent to Assumptions of Analysis or Spurious
Operations 7.3-2
7.3-2 Required Manual Actions by Fire Area 7.3-4 7.3-3 Operations Required for a Control Room Fire Using the Isolation
Condenser Method of Shutdown 7.3-10
7.6-1 Communication System Availability Matrix 7.6-4
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LIST OF FIGURES
NUMBER TITLE
1.2-1 Development of Dresden 1982 Associated Circuits Analysis
1.2-2 Development of Dresden 1982 Exemption Requests and Interim Measures
2.2-1 Appendix R Shutdown Paths for Dresden Unit 2 Reactor Building
2.2-2 Appendix R Shutdown Paths for Dresden Unit 3 Reactor Building
2.2-3 Appendix R Shutdown Paths for Dresden Units 2&3 Turbine Building
3.1-1 Isolation Condenser System Sketch
3.1-2 Control Rod Drive System Sketch
3.1-3 Hot Shutdown AC & DC Single Line Diagram
3.1-4 High Pressure Coolant Injection System Sketch
3.1-5 Low Pressure Coolant Injection Torus Cooling Mode
3.1-6 Diesel Generator System Sketch
3.2-1 Shutdown Cooling System Sketch
3.2-2 RBCCW System Sketch
3.2-3 Service Water System Sketch
3.2-4 Cold Shutdown AC & DC Single Line Diagram
3.2-5 L.P. Coolant Injection Cold Shutdown Mode
3.3-1 Typical Cabling Diagram
3.3-2 Typical Schematic
5.1-1 Valves Whose Spurious Operation Could Degrade Operability of Safe Shutdown Systems
5.1-2 Valves Whose Spurious Operation Could Cause Loss of Reactor Inventory
6.2-1 Alternate Feed to Inboard Isolation Condenser Valves
6.2-2 Deleted
6.2-3 Diesel Generator 2/3 Bus
6.2-4 Cable Routing Diagram for 2/3 Diesel Generator Cooling Water Pump
7.2-1 Time Intervals Available for Makeup Water Initiation Given Automatic
Initiation of Isolation Condenser
7.2-2 Time Interval Available for Makeup Water Initiation Given Initiation of Isolation
Condenser 15 Minutes After Scram
DRESDEN 2 & 3 AMENDMENT 17 JUNE 2009
A-1
APPENDIX A A.1 HOT SHUTDOWN CABLE DISCREPANCIES FOR DRESDEN UNITS 2 AND 3
This Appendix documents the cable discrepancies identified using the methodology described in Section 4.0 for each Dresden Units 2&3 fire area and their resolutions. This Appendix provides the technical documentation that supports the fire area by fire area safe hot shutdown analysis described in Section 4.0.
The resolutions to the cable discrepancies are listed on pages A-3 through A-7 and are referenced by number under the resolution column in Tables A-1 through A-10.
The notes referenced by some equipment in Tables A-1 through A-10 are listed on the equipment’s applicable F-221 / F-222 series drawing. These drawings are of historical status and should be used for reference only.
DRESDEN 2 & 3 AMENDMENT 16 JUNE 2007
A-2
A.2 Not Used.
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-3
A.3 Resolution of Cable Discrepancies
The following resolutions of cable discrepancies are referenced in the resolution column of Tables A-1 through A-10.
1. Target rock (mechanical function) and safety valves are available for RPV pressure
control. 2. The unaffected unit's Division 1 equipment and power will be used via normally open
crossties in the service water and condensate transfer piping. A normally closed valve in Fire Zone 8.2.6.C will be opened to establish a crosstie for the CRD pumps. All valves will be manually opened or provided with an alternate feed from the other unit (see Subsection 6.2.3.2).
3. A new breaker has been added in the 2/3 diesel generator room to prevent a fault in one
unit's bus duct from affecting power to the other unit from the 2/3 diesel generator (see Subsection 6.2.3.1.1). The unaffected unit's pumps will be used to provide water to the affected unit's isolation condenser and reactor vessel (see Note 2).
4. An alternate control and power source has been provided from the opposite unit in case
these normally open valves (MO1301-1 and MO1301-4) were to spuriously close (see Subsection 6.2.1.4 and 6.2.2.4).
5. Valves MO2(3)-1301-2, MO2(3)-1301-3, MO2(3)-1301-10, MO2(3)-4102 and MO2(3)-
4399-74 will be manually handwheel operated if they were to close. 6. AO2(3)-1301-17 and AO2(3)-1301-20 fail in the closed position. Also, manual operation
of AO2(3)-1301-16 is possible. 7. Isolation and local control capability is provided in the 2/3 diesel generator room for the
2/3 diesel generator and its auxiliaries (Fire Area RB2/3). 125-Vdc for excitation is available from the unaffected unit.
8. The LPCI and core spray circuits are associated with the 4-kV power distribution.
However, since the opposite unit's power train is utilized, faults in these cables will not affect safe shutdown.
9. 2/3 diesel generator auxiliaries can be controlled and fed from the unaffected unit (see
Subsection 6.2.3.1.2). Transfer switches ensure isolation of each unit's feed from the other.
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-4
10. The primary containment isolation, process radiation monitoring, and main steam
isolation circuits are associated with the isolation condenser valves. However, the drywell valves will be controlled from the alternate power source by isolating the automatic circuitry. The power train to the remaining valves will be de-energized and the valves will be operated manually. A detailed circuits analysis shows that only control room faults can spuriously open the MSIVs (see Subsections 6.2.1.4 and 6.2.2.4).
11. The required circuit breaker control circuits can be isolated by local isolation switches
and then operated locally at the switchgear (see Subsections 6.2.1.2 and 6.2.2.2). 12. The control logic for the 2/3 diesel generator feed breakers to SWGR 23-1 and 33-1 has
been modified so that the operator can manually configure them to feed both buses simultaneously (see Subsection 6.2.3.1.6).
13. Deleted. 14. The LPCI and core spray circuits are associated with the 4-kV power distribution.
However, since the diesel generator and all necessary breaker controls will be isolated and operated locally, faults on these circuits will not affect safe shutdown (see Subsections 6.2.1.2 and 6.2.2.2).
15. Unit 2 cables to the 2/3 diesel generator and its auxiliaries, and the bus duct from the 2/3
diesel generator to SWGR 23-1, pass through the corner of Fire Zone 1.1.1.2 nearest to the 2/3 diesel generator room. These cables and bus duct are protected by a one-hour fire wrap (see Subsection 6.3.3.2).
16. This cable affects the feed to MCC 28-1. The 2/3 diesel generator fuel oil transfer pump,
2/3 diesel generator vent fan, and valves MO2-1301-1 and MO2-1301-4 can be fed from MCC 38-1 independent of this area. Transfer switches have been provided so that faults do not affect the alternate feeds (see Subsection 6.2.3.1.3). The local control station for MCC 38-1 has been moved to Fire Area RB2/3.
17. The 2/3 diesel generator cooling water pump can be fed from MCC 38-3 independent of
this area. A transfer switch has been provided so that faults do not affect the alternate feed (see Subsection 6.2.3.1.4).
18. Fire protection is provided such that the Unit 3 service water pumps are available for a
fire in the area of the Unit 2 service water pumps and vice versa. 19. Fire protection is provided such that a single fire will disable only one diesel generator
cooling water pump (see Subsection 6.3.5). 20. The loads normally required to be fed from this MCC (28-2) are condensate transfer
pump 2A and 125-Vdc battery charger 2A, 250-V Battery Charger 2, 120-Vac panel 902-52A, and 120/240-Vac instrument bus 902-50. If the corresponding Division II feed to condensate transfer pump 2B is also unavailable, the makeup water to the isolation
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-5
condenser will be taken from the service water system. The 125-Vdc loads will be fed from reserve sources which originate in Unit 3. All 250-Vdc valves are assumed to be manually operated; credit is taken for visual monitoring of local reactor instrumentation in the reactor building. Valves 2-1301-17 and 2-1301-20, which are fed from 902-50, fail closed.
21. While in hot shutdown, it is necessary to prevent the electromatic relief valves from
spuriously opening to preserve the reactor vessel coolant inventory. For fires external to the main control room, an AUTO BLOWDOWN INHIBIT switch at the MCB will prevent spurious blowdown. If the fire is in the MCR, it may be necessary to trip all of the power feeds to the blowdown logic. This is covered by procedures. Excessive reactor pressure will be controlled by the mechanically actuated target rock or safety valves.
22. 2/3 diesel generator cooling water pump can be fed from MCC 28-3 independent of this
area. A transfer switch has been provided so that faults do not affect the alternate feeds (see Subsections 6.2.3.1.2 and 6.2.3.1.4).
23. These cables are protected by a 1-hour barrier, automatic suppression and detection
within TB-II (see Subsection 6.3.4.4). 24. A modification moved this control station to the 2/3 diesel generator room (RB2/3). The
cable will no longer enter the turbine building (see Subsection 6.2.3.1.3). 25. Spurious operation of the CO2 systems cannot harm the diesels. The associated circuits of
concern are interlocks that stop the affected diesel generator room ventilation fan upon activation of the CO2 system. A local bypass switch on the diesel generator control panel will restore normal vent fan operation (see Subsection 6.2.3.1.2). If the CO2 has spuriously discharged, supplied-air breathing apparatus will be needed by personnel entering the diesel generator room.
26. A fault could affect automatic start of 2/3 diesel generator. Manual operation of the diesel
is proposed, therefore, this is of no consequence. A spurious UV signal could trip the bus tie between 4-kV buses 23 and 23-1. This is of no consequence in the zones in which this can happen. A fuse isolates this circuit from other 125-Vdc circuits at the switchgear (see Subsection 6.2.3.1.2).
27. The unit dedicated diesels are independent of this fire area. Diesel operation procedures
require disabling of breakers to the RAT, which is the source of this circuit association. 28. Cable for all other level recorders is independent of this fire area. 29. 480-V breakers can be manually operated by an operator. 30. Both normally open tie breakers 3938 and 3839 must spuriously close for them to be
considered. Only a single spurious operation is assumed (see GL 85-01).
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-6
31. An isolation switch in the turbine building prevents a fire in the crib house from affecting
the diesel generator 3 fuel oil transfer pump. 32. The risers containing these cables are protected by a 1-hour fire wrap and suppression
and detection in the immediate area. 33. Local instruments will be used to monitor system functions. 34. The separation of the redundant transmitters that feed these instruments is discussed in
sections 3.6 (Unit 2) and 4.5 (Unit 3) of the Exemption Requests. 35. Level and pressure indication is provided by instruments 640-106A&B, 640-25A&B, and
640-29A&B. 36. A single spurious signal will cause only one solenoid (either ac or dc) of a valve to fail to
perform its function. As a result, for a given fire, one MSIV on each steamline could fail to close. But, the redundant valve on each steamline would isolate the line.
37. The switchgear whose control circuits are fed from this panel will be manually
configured. 38. CT will be shorted at generator. 39. Fuses will be installed in the auxiliary relay circuit. 40. The fire pump can be started locally. It will continue to run independent of all cables.
This water is used for isolation condenser makeup, which is not needed until 20 minutes after the initiation of the isolation condenser. This allows more than enough time to start the fire pump.
41. For the CRD discharge valves, 480 VAC power can be removed and valves manually
operated locally. 42. Isolation condenser makeup pump day tanks 2/3-5215A and 2/3-5215B can be manually
refilled if fuel oil pump 2-5203 or its power cables are damaged in a fire. 43. The isolation condenser makeup pumps can be started and operated locally. 44. Clean Demineralizer Tank depletion can be determined by monitoring Isolation
Condenser Makeup Pump flow.
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-7
*Energizes Valve
TABLE A-1
FIRE AREA RB2-I
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 243
Electromatic Relief Valve 2-203-3B
25069 23938
P* P*
1.3.2 1.3.2
1 1
244 Electromatic Relief Valve 2-203-3C
23905 23941
P* P*
1.3.2 1.3.2
1 1
245 Electromatic Relief Valve 2-203-3D
23906 23944
P* P*
1.3.2 1.3.2
1 1
246 Electromatic Relief Valve 2-203-3E
23940 23947
P* P*
1.3.2 1.3.2
1 1
242 Target Rock Valve 2-203-3A
25061 23935
P* P*
1.3.2 1.3.2
1 1
2267 Main Steam Isolation Valve AO2-203-1A
26342
26345
C
C
1.3.2
1.3.2
36
36
2268 Main Steam Isolation Valve AO2-203-1B
26356
26359
C
C
1.3.2
1.3.2
36
36
2269 Main Steam Isolation Valve AO2-203-1C
26370
26373
C
C
1.3.2
1.3.2
36
36
2270 Main Steam Isolation Valve AO2-203-1D
26384
26387
C
C
1.3.2
1.3.2
36
36
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-8
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 243
Electromatic Relief Valve 2-203-3B
23901
23938
C*
C*
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
1
1
244
Electromatic Relief Valve 2-203-3C
23905 23917
23941
C* C*
C*
1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
1 1
1
245
Electromatic Relief Valve 2-203-3D
23906 25055
23944
C* C*
C*
1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
1 1
1
246
Electromatic Relief Valve 2-203-3E
23902
23940 23947
C*
C* C*
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2 1.1.2.3
1
1 1
242
Target Rock Valve 2-203-3A
25061 25062
23935
C* C*
C*
1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
1 1
1
22
4160-V Buses 23 & 23-1 Main Feed Breakers 152-2302 & 152-2329
20627
20628
20629
20630
20851
20850
P
P
P
C
C
C
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-9
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 23
4160-V Bus 23-1 2/3 DG Feed Breaker 152-2333
20441
20853
20857
20855
Bus
20360
20449
30419
20445 67577
C
C
C
C
P C
C
C
C C
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2 1.1.2.3
2,3,7,9,12
2,3,7,9,12
2,3,7,9,12
2,3,7,9,12
2,3,7,9,12 2,3,7,9,12
2,3,7,9,12
2,3,7,9,12
2,3,7,9,12 2,3,7,9,12
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-10
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 212
480V SWGR 28 tie to 29
21390
21391
21392
21393
21394
21395
21089
20021
21022
21492
21494
21396
P
P
P
P
P
P
C
C
C
C
C
C
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
42
42
42
42
42
42
42
42
42
42
42
42
209
480V MCC 29-2
69715
69717
69718
69719
P
P
P
P
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
42
42
42
42
222
250Vdc MCC 2A
24179
24180
24181
24182
P
P
P
P
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
5
5
5
5
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-11
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 223
250Vdc MCC 2B
34080
34081
34082
34085
34089
34090
34091
34092
P
P
P
P
P
P
P
P
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
5
5
5
5
5
5
5
5
233
Isolation Condenser Valve MO2-1301-1
22559 77650 77651 67594 67595
C C C P C
1.1.2.2 1.1.2.1 1.1.2.1 1.1.2.2 1.1.2.2
4 4 4 4 4
234 Isolation Condenser Valve MO2-1301-2
23774
23775
23776
23777
23778
P
P
C
C
C
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
5
5
5
5
5
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-12
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 235
Isolation Condenser Valve MO2-1301-3
23754
23755
23756
23757
23758
P
P
C
C
C
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
5
5
5
5
5
236
Isolation Condenser Valve MO2-1301-4
22576 67593 67592 77650 77651 77692
C P C C C C
1.1.2.2 1.1.2.2 1.1.2.2 1.1.2.1 1.1.2.1 1.1.2.1
4 4 4 4 4 4
237 Isolation Condenser Valve MO2-1301-10
65841
65843
65844
65845
65530
C
C
C
P
C
1.1.2.2 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.2
5
5
5
5
5 238 239
Isolation Condenser Valves AO2-1301-17&20
26273
26274
26275
26276
C
C
C
C
1.1.2.2 1.1.2.3 1.1.2.4 1.1.2.2 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4
6
6
6
6
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-13
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 240
Isolation Condenser Valve MO2-4102
65846
65847
65529 65842
P
C
C C
1.1.2.3 1.1.2.4 1.1.2.3 1.1.2.4 1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.4
5
5
5 5
33
4160 V Bus 33-1 2/3 DG Feed Brkr 152-3333
20857
20360
20449
30419
20445
C
C
C
C
C
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
3201 2/3 DG Control, Metering, & Excitation
20361 20359
20449
20360
20446 20356
20448 20447 20445 28485
20853
C C
C
C
C C
C C C C
C
1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2 1.1.2.2 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
7 7
7
7
7 7
7 7 7 7
7
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-14
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3201
Isolation Condenser Supply Isolation Vlv. MO2-4399-74
29435
80072
80073 80074 20441
67545
22842
67128
67554
67555
67577
C
C
P P C
C
C
C
C
C
C
1.1.2.3 1.1.2.4
1.1.2.4
1.1.2.4 1.1.2.4 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.4 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3
5
5
5 5 7
7
7
7
7
7
3204
2/3 DG Fuel Oil Transfer Pump 2/3-5203
67573
67572
68395
P
C
C
1.1.2.2 1.1.2.3
1.1.2.2 1.1.2.3
1.1.2.2 1.1.2.3
9
9
9
3202
2/3 DG Room Supply Fan 2/3-5790
67575
67574
68395
P
C
C
1.1.2.2 1.1.2.3
1.1.2.2 1.1.2.3
1.2.2.2 1.2.2.3
9
9
9
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-15
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3203
2/3 DG Cooling Water Pump 2/3-3903B
22395
68395
C
C
1.1.2.2
1.1.2.2 1.1.2.3
9
9
2007
LPCI, Sys. 1, Ckt. A (Note 7)
22696
C
1.1.2.1 11.2.2 1.1.2.2
8,2,3,7,9
20825
C
1.1.2.2 1.1.2.3
1.1.2.3
8,2,3,7,9
22733
C
1.1.2.2 1.1.2.3
8,2,3,7,9
20227
C
1.1.2.2 1.1.2.3
8.2.3.7.9
20813
C
1.1.2.2 1.1.2.3
8,2,3,7,9
20826
C
1.1.2.2
8,2,3,7,9
22547
65134
67201 67203 20284
20226
65102 65103
C
C
C C C
C
C C
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.3 1.1.2.3
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-16
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 2009
LPCI, Sys. II, Ckt. A (Note 9)
23977
23810 23954
22743 20224 22738 22950 23958 65106 65107 22724 20225 65135
67228 67230
C
C C
C C C C C C C C C C
C C
11.2.1 1.1.2.2 1.1.2.3 1.1.2.3 11.2.1 1.1.2.2 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.2
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
2011 Core Spray Sys. I (Note 11)
22811
65134
67201 67203 22809
22812
65102 65103
C
C
C C C
C
C C
1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 1.1.2.2 1.1.2.3 11.2.2 1.1.2.2 1.1.2.3 1.1.2.3
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-17
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 2012
Core Spray, Sys. II (Note 12)
20287 65106 65107 22810 22819
23977
C C C C C
C
1.1.2.3 1.1.2.3 1.1.2.3 1.1.2.3 11.2.1 1.1.2.2 1.1.2.3 11.2.1 1.1.2.2 1.1.2.3
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
2017
PCIS, Ckt. A (Note 17)
26277 26281 26279
C C C
1.1.2.2 1.1.2.3 1.1.2.3
10 10 10
2018
PCIS, Ckt. B (Note 18)
26283 26280 26278
C C C
1.1.2.3 1.1.2.3 1.1.2.2 1.1.2.3
10 10 10
2022
Main Steam Isolation Ckt. Inbd Ckt. A (Note 22)
26342 26356 26370 26384
C C C C
1.1.2.2 1.1.2.2 1.1.2.2 1.1.2.2
10 10 10 10
2023 Main Steam Isolation Ckt. Inbd Ckt. B (Note 23)
26345 26359 26373 26387
C C C C
1.1.2.2 1.1.2.2 1.1.2.2 1.1.2.2
10 10 10 10
2024 PCIS Sensor & Trip Logic, Ckt. A (Note 24)
26312 26320 23764
24146 24011
24148
C C C
C C
C
1.1.2.3 1.1.2.3 11.2.1 1.1.2.2 11.2.1 11.2.1 1.1.2.2 11.2.1
10 10 10
10 10
10
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-18
TABLE A-2
FIRE AREA RB2-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 2025
PCIS Sensor & Trip Logic, Ckt. B (Note 25)
26313 26321 23824
24147 24012
24149
C C C
C C
C
1.1.2.3 1.1.2.3 11.2.1 1.1.2.2 11.2.1 11.2.1 1.1.2.2 11.2.1
10 10 10
10 10
10
2027 Auto Blowdown Part 1 (Note 27)
25050
C
1.1.2.2 1.1.2.3
21
2028
Auto Blowdown Part 2, Ckt. A (Note 28)
23916
C
1.1.2.3
21
2029
Auto Blowdown, Part 2 Ckt. B (Note 29)
23916
C
1.1.2.3
21
2036
PCIS Main Steam Isol. Ckt. A Outbd (Note 36)
20687
P
1.1.2.2 1.1.2.3
10
2039 3039
Fire Protection CO2 System (Note 39)
20703
C
1.1.2.2
25
2267
Main Steam Isolation Valve AO2-203-1A
26342
26345
C
C
1.1.2.2
1.1.2.2
36
36
2268 Main Steam Isolation Valve AO2-203-1B
26356
26359
C
C
1.1.2.2
1.1.2.2
36
36
2269 Main Steam Isolation Valve AO2-203-1C
26370
26373
C
C
1.1.2.2
1.1.2.2
36
36
2270 Main Steam Isolation Valve AO2-203-1D
26384
26387
C
C
1.1.2.2
1.1.2.2
36
36
DRESDEN 2 & 3 AMENDMENT 13 JUNE 2001
A-19 *Energizes Valve
TABLE A-3
FIRE AREA RB3-1
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 342
Target Rock Valve 3-203-3A
33668 33935
C* C*
1.4.1 1.4.1
1 1
343
Electromatic Relief Valve 3-203-3B
33938 33669
C* C*
1.4.1 1.4.1
1 1
344
Electromatic Relief Valve 3-230-3C
33670 33941
C* C*
1.4.1 1.4.1
1 1
345
Electromatic Relief Valve 3-203-3D
33671 33944
C* C*
1.4.1 1.4.1
1 1
346
Electromatic Relief Valve 3-203-3E
33672 33947
C* C*
1.4.1 1.4.1
1 1
3367
Main Steam Isolation Valve AO3-203-1A
36345 36342
C C
1.4.1 1.4.1
36 36
3368
Main Steam Isolation Valve AO3-203-1B
36359 36356
C C
1.4.1 1.4.1
36 36
3369
Main Steam Isolation Valve AO3-203-1C
36373 36370
C C
1.4.1 1.4.1
36 36
3370
Main Steam Isolation Valve AO3-203-1D
36387 36384
C C
1.4.1 1.4.1
36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-20
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 342
Target Rock Valve 3-203-3A
33654 33668
33673 33935
34839 30272
30275
30280 30281
C* C*
C* C*
C* P
P
P P
1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.3
1 1
1 1
1 1
1
1 1
343 Electromatic Relief Valve 3-203-3B
33657 34845 33938
34840 33669
30272
30275
30280 30281
C* C* C*
C* C*
P
P
P P
1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.3
1 1 1
1 1
1
1
1 1
*Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-21
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 344
Electromatic Relief Valve 3-203-3C
33661 33670
34849 33941
34844 30272
30275
30280 30281
C* C*
C* C*
C* P
P
P P
1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.3
1 1
1 1
1 1
1
1 1
345 Electromatic Relief Valve 3-203-3D
33662 33671
33674 33944
34845 30272
30275
30280 30281
C* C*
C* C*
C* P
P
P P
1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.3
1 1
1 1
1 1
1
1 1
*Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-22
TABLE A-4
FIRE AREA RB3-II Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 346
Electromatic Relief Valve 3-203-3E
33667 33672
33674 34849 33947
30272
30275
30280 30281
C* C*
C* C* C*
P
P
P P
1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.3
1 1
1
1
1
1
1 1
23
4160-V Bus 23-1 2/3 DG Feed Brkr 152-2333
20857
30419
Bus
20360 20449 20445 67577
C
C
P C C C C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3
2,3,7,9
2,3,7,9,15
2,3,7,9,15
15 15
2,3,7,9 2,3,7,9
322
250Vdc MCC 3A
34179 34180 34181 34182
P P P P
1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.4
5 5 5 5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-23
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 323
250Vdc MCC 3A
24080
24081
24082
24085
24089
24090
24091
24092
P
P
P
P
P
P
P
P
1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4
5
5
5
5
5
5
5
5 333
Isolation Condenser Valve MO3-1301-1
32555 32557 32559
69995 69996 77658 67566
67567
77652 77653 77659
P C C
P P C P
P
P P C
1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.4 1.1.1.1 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2 1.1.1.2
4 4 4
4 4 4 4
4
4 4 4
334 Isolation Condenser Valve MO3-1301-2
33774 33775 33776 33777 33778
P P C C C
1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.3 1.1.1.4
5 5 5 5 5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-24
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 335
Isolation Condenser Valve MO3-1301-3
33754
33755
33756
33757
33758
P
P
C
C
C
1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4
5
5
5
5
5 336
Isolation Condenser Valve MO3-1301-4
32572 32574 32576
77694 77655 77654 77693 67571
77658 67567
67566
69997 69999
P C C
P P C C C
C P
P
C C
1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.1 1.1.1.1
4 4 4
4 4 4 4 4
4 4
4
4 4
337 Isolation Condenser Valve MO3-1301-10
75816
75818 75819 75821 75331 75826
C
C P C C C
1.1.1.2 1.1.1.3 1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.2 1.1.1.2
5
5 5 5 5 5 5
338 Isolation Condenser
36273
C
1.1.1.3
6
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-25
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 339
Valves AO3-1301-17&20
36274
36275
36276
C
C
C
1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4
6
6
6 340
Isolation Condenser Valve MO3-4102
75820 75822 75816
75332 75827
P C C
C C
1.1.1.4 1.1.1.4 1.1.1.2 1.1.1.3 1.1.1.4 1.1.1.2 1.1.1.2
5 5 5
5 5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-26
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3201
2/3 DG Control, Metering, & Excitation (Note 49)
20361 34175
C P
1.1.1.2 1.1.1.2 1.1.1.3
15 15
30359
C
1.1.1.2 1.1.1.3
15
20359 20449 20360 30433
C C C C
1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3
15 15 15 15
20446 20356 20448 20447 20445 38485
C C C C C C
1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3
15 15 15 15 15 15
77352
C
1.1.1.2 1.1.1.3
15
67545 67554
C C
1.1.1.2 1.1.1.2 1.1.1.3
15 15
67555
C
1.1.1.2 1.1.1.3
15
67577
C
1.1.1.2 1.1.1.3
15
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-27
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3204
2/3 DG Fuel Oil Transfer Pump 2/3-5203
32711 32712 67573
P C P
1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3
15 15 15
67572
C
1.1.1.2 1.1.1.3
15
33793
C
1.1.1.2 1.1.1.3 1.1.1.4
15
33794
P
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
33795
P
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
33796
C
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
33797
C
1.1.1.3 1.1.1.4
15
77524
C
1.1.1.2 1.1.1.3
9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-28
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3202
2/3 DG Room Supply Fan 2/3-5790
32988
P
1.1.1.2
15
32989
C
1.1.1.2
15
22993
C
1.1.1.2
15
Fan 2/3-5790
67575
P
1.1.1.2 1.1.1.3
15
67574
C
1.1.1.2
15
75524
C
1.1.1.2 1.1.1.3
9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-29
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3203
2/3 DG Cooling Water Pump 2/3-3903B
22395
32395
C
C
1.1.1.2
1.1.1.2
15
15
33792
C
1.1.1.3 1.1.1.4
15
33789
P
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
33790
P
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
75524
C
1.1.1.2 1.1.1.3
15
33791
C
1.1.1.2 1.1.1.3 1.1.1.4 1.3.1
15
Isolation Condenser Supply Isolation Vlv. MO3-4399-74
39435
C
1.1.1.3 1.1.1.4
5
80064
C
1.1.1.4
5
80070
P
1.1.1.4
5
80071
P
1.1.1.4
5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-30
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3007
LPCI, Sys. I, Ckt. A (Note 7)
30226 30284 75124 75125 30825 32547 30813 32696
30228 32733 75197
75851 75853
C C C C C C C C
C C C
C C
1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.1 11.1.2 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2
2,3,7,9 2,3,7,9 2,3,7,9 2,3,7,9 2,3,7,9 2,3,7,9 2,3,7,9 2,3,7,9
2,3,7,9 2,3,7,9 2,3,7,9
2,3,7,9 2,3,7,9
3009 LPCI. Sys. II, Ckt. A (Note)
30225
32724
75128 75129 33958 32950 33954
30224
32738 32743 32810 33977
75198
75875 75877
C
C
C C C C C
C
C C C C
C
C C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 11.1.1 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 11.1.1 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-31
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3011
Core Spray, Sys. I (Note 11)
32811 75124 75125 32809 75197 75851 75853
32812
C C C C C C C
C
1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.2 1.1.1.2 1.1.1.2 1.1.1.3 11.1.2 1.1.1.2 1.1.1.3
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
3012
Core Spray, Sys. II (Note 12)
30287
75128 75129 32810 32819
33977
75198
75875 75877
C
C C C C
C
C
C C
1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3 1.1.1.3 11.1.1 1.1.1.2 11.1.1 1.1.1.2 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.2
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
3017 PCIS Ckt. A (Note 17)
36277
36279 36281
C
C C
1.1.1.2 1.1.1.3 1.1.1.3 1.1.1.3
10
10 10
3018 PCIS, Ckt. B (Note 18)
36278 36280 36283
C C C
1.1.1.2 1.1.1.3 1.1.1.3
10 10 10
3022 Main Steam Isolation Ckt. A Inbd
36342
36356
36370
36384
C
C
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
10
10
10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-32
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3023
Main Steam Isolation Ckt. B Inbd (Note 23)
36345
36359
36373
36387
C
C
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
10
10
10
10
3024
PCIS Sensor & Trip System Ckt. A (Note 24)
33764
34146
34011
34148
C
C
C
C
11.1.2 1.1.1.2 1.1.1.1 11.1.1 11.1.2 11.1.2 1.1.1.2 1.1.1.1 11.1.1 11.1.2
10
10
10
10
3025 PCIS Sensor & Trip System Ckt. B (Note 25)
33824
34147
34012 34149
C
C
C C
11.1.2 1.1.1.2 1.1.1.1 11.1.1 11.1.2 1.1.1.2 1.1.1.1
10
10
10 10
3027 Auto Blowdown Part I Ckt. A (Note 27)
35050 33934
C C
1.1.1.3 1.1.1.3
21 21
3028 Auto Blowdown Part 2 Ckt. A (Note 28)
33934
C
1.1.1.3
21
3029
Auto Blowdown Part 2 Ckt. B (Note 29)
33916
C
1.1.1.3
21
3367
Main Steam Isolation Valve AO3-203-1A
36345
36342
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-33
TABLE A-4
FIRE AREA RB3-II
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3368
Main Steam Isolation Valve AO3-203-1B
36345
36342
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
36
36
3369
Main Steam Isolation Valve AO3-203-1C
36345
36342
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
36
36
3370
Main Steam Isolation Valve AO3-203-1D
36345
36342
C
C
1.1.1.2 1.1.1.3 1.1.1.2 1.1.1.3
36
36
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-34
TABLE A-5
FIRE AREA RB2/3
Item No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
233 Isolation Condenser Valve MO2-1301-1
7765677657
CP
9.0.C9.0.C
44
236 Isolation Condenser Valve MO2-1301-4
7765677657
77691
CP
C
9.0.C9.0.C
9.0.C
44
4
333 Isolation Condenser Valve MO3-1301-1
6756667567
PP
9.0.C9.0.C
44
336 Isolation Condenser Valve MO3-1301-4
675716756767566
CPP
9.0.C9.0.C9.0.C
444
20393039
Fire Protection CO2System (Note 39)
20703 C 9.0.C 25
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-35
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
243 Electromatic Relief Valve 2-203-3B
23901
25069
20271
23927
23904
C*
C*
P
P
P
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
1
1
1
1
1
244 Electromatic Relief Valve 2-203-3C
23905
23917
20272
23927
23904
P
C*
P
P
P
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
1
1
1
1
1
Energizes Valve
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-36
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
245 Electromatic Relief Valve 2-203-3D
23906
25055
20272
23927
23904
C*
C*
P
P
P
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
1
1
1
1
1
246 Electromatic Relief Valve 2-2303-3E
23902
23940
20272
23927
23904
C*
C*
P
P
P
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
1
1
1
1
1
242 Target Rock Valve 2-203-3A
25061
25062
C*
C*
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A
1
1
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-37
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
24220271
23927
23904
P
P
P
8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
1
1
1
22 Brkrs 152-2302 and 152-2329
20627
20628
20629
20630
20631
20632
20851
20850
20680
P
P
P
C
C
C
C
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.6.A
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,9
2,3,7,923 Brkr 152-2333 20441
20853
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
2,3,7,9,12
2,3,7,9,12
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-38
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
23 20855
20626
20445
C
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B
2,3,7,9, 12
2,3,7,9, 12
2,3,7,9, 12
232 DG2 Fuel Oil Transfer Pump 2-5203
22202
22203
22718
66009
P
C
C
C
8.2.5.A9.0A
8.2.5.A9.0A
8.2.5.A
8.2.5.A
42
42
42
42
212 480V SWGR 28 tie to 29
21494
21396
C
C
8.2.6.A8.2.5.A8.2.6.A8.2.5.A
42
42
219 480V MCC 29-2 69715697176971869719
PPPP
8.2.5.A8.2.5.A8.2.5.A8.2.5.A
42424242
233 Isolation Condenser Valve MO2-1301-1
22559 C 8.2.5.A8.2.6.A8.2.6.B
4
234 Isolation Condenser Valve MO2-1301-2
23778 C 7.0.A.18.2.6.A8.2.6.B
5
235 Isolation Condenser Valve MO2-1301-3
23758 C 7.0.A.18.2.6.A8.2.6.B
5
236 Isolation Condenser Valve MO2-1301-4
22576 C 8.2.5.A8.2.6.A8.2.6.B
4
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-39
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
237 Isolation Condenser Valve MO2-1301-10
65128 C 8.2.5.A8.2.6.A8.2.6.B
5
238239
Isolation CondenserValves AO2-1301-17&20
26273
26274
6725826275
C
C
CC
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.17.0.A.18.2.6.A8.2.6.B
6
6
66
26276 C 7.0.A.18.2.6.A8.2.6.B
6
240 Isolation Condenser Valve MO2-4102
Isolation Condenser Supply Isolation Vlv.MO3-4399-74
65129
29435
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.6.A8.2.6.B
5
5
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-40
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
3201 2/3 DG Control, Metering, & Excitation (Note 49)
20446
20448
20447
20445
22842
28485
20853
20441
C
C
C
C
C
C
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
7
7
7
7
7
7
7
7
3203 2/3 DG Cooling Water Pump 2/3 -3903B
22394
22395
P
C
8.2.5.A8.2.6.A8.2.6.A8.2.6.B
9
9
3205 Diesel Fire Pump 2/3-4101
23729 C 8.2.5.A 40
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-41
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2007 LPCI, Sys. I, Ckt. A (Note 7)
22951
22696
20825
22733
20228
20813
22547
67201
67203
20284
20226
2083020723
65142
P
C
C
C
C
C
C
C
C
C
CP
C
7.0.A.18.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.1.A8.2.2.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,98,2,3,7,9
8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-42
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2009 LPCI, Sys. II, Ckt. A (Note 9)
22952
23977
22810
23954
22743
20819
2084020224
22738
22950
23958
P
C
C
C
C
C
CC
C
C
C
7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.5.A7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,98,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-43
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2009 6723065144
CP
8.2.6.B7.0.A.1
8,2,3,7,98,2,3,7,9
22724
20225
69065
C
C
C
7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.6.A8.2.6.B
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
2011 Core Spray, Sys. I (Note 11)
22951
22811
67201
67203
22809
22812
20809
65142
P
C
C
C
C
C
P
C
7.0.A.18.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.2.A8.2.5.A8.2.5.B8.2.6.A8.2.5.A8.2.6.A8.2.6.B
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-44
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2012 Core Spray, Sys.II (Note 12)
22952
20287
6723065149
22810
22819
23977
67228
P
C
CC
C
C
C
C
7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.6.B
8,2,3,7,9
8,2,3,7,9
8,2,3,7,98,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
2017 PCIS,Ckt.A(Note 17)
26277
26281
26279
24176
24211
C
C
C
P
P
8.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.6.A8.2.6.B7.0.A.18.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A7.0.A.1
10
10
10
10
10
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-45
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2018 PCIS, Ckt. B(Note 18)
26283
26280
26278
24211
C
C
C
P
7.0.A.18.2.6.A8.2.6.B7.0.A.18.2.6.A8.2.6.B7.0.A.18.2.6.A8.2.6.B7.0.A.1
10
10
10
10
2020 Process Radiation Monitoring System, Ckt. A (Note 20)
24176 P 7.0.A.18.2.5.A8.2.6.A
10
2021 Process Radiation Monitoring System,Ckt. A (Note 21)
24211 P 7.0.A.1 10
2022 Main Steam Isolation Ckt. Inboard Ckt. A (Note 22)
26342
26356
26370
26384
24176
C
C
C
C
P
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B7.0.1.A8.2.5.A8.2.6.A
10
10
10
10
10
2023 Main Steam Isolation Ckt. Inboard Ckt. B (Note 23)
26345
26359
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A
10
10
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-46
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
202326373
26387
C
C
8.2.6.B8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
10
10
2024 PCIS Sensor & Trip Logic, Ckt. A(Note 24)
26323
26320
24013
23840
23785
23784
23782
23780
24000
23834
23829
23828
23786
24020
23764
24011
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
8.2.6.A8.2.6.B8.2.6.A8.2.6.B8.2.6.A8.2.6.B8.2.6.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.6.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.6.A8.2.6.B8.2.6.A8.2.6.B8.2.6.A8.2.6.B
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-47
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2025 PCIS Sensor & Trip Logic, Ckt. B(Note 25)
26313
26321
24014
23841
23768
23767
23766
23765
24001
23773
23771
23770
23769
24021
23824
24012
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
8.2.6.A8.2.6.B8.2.6.A8.2.6.B8.2.5.A8.2.6.B8.2.6.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.6.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.5.A8.2.6.B8.2.6.A8.2.6.B8.2.6.A8.2.6.B
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
2027 Auto Blowdown,Part 1 (Note 27)
23927
23904
P
P
7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A
21
21
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-48
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2027(Cont'd)
25050 C 8.2.5.A8.2.6.A8.2.6.B
21
2028 Auto Blowdown,Part 2, Ckt. A
(Note 28)
22952
23904
23927
23916
P
P
P
C
7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A7.0.A.18.2.5.A8.2.6.A8.2.6.B
21
21
21
21
2029 Auto BlowdownPart 2, Ckt.B
(Note 29)
23916
22952
C
P
7.0.A.18.2.5.A8.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A
21
21
2036 PCIS Main SteamIsol. Ckt. A-Outbd
(Note 36)
20687
26349
263506725626362
2636426376
P
C
CCC
CC
7.0.A.18.2.6.A8.2.6.B7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.1
10
10
101010
1010
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-49
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2036
263786725726390
263922638626372263752638924211
CCC
CCCCCP
8.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A8.2.5.A8.2.5.A8.2.5.A7.0.A.1
101010
101010101010
2037 PCIS Main SteamIsolation Ckt. BOutbd (Note 37)
26348
263796725626363
2634426377
263936725726391
26347263582638626372
C
CCC
CC
CCC
CCCC
7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A8.2.5.A8.2.5.A
10
101010
1010
101010
10101010
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-50
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2037 (Cont'd)
26394263892637526380
CCCC
8.2.5.B8.2.5.A8.2.5.A8.2.5.A
10101010
20393039
Fire ProtectionCO2 System
(Note 39)
24172
207026582925009250102502025029250303503525015
2500425044250353502435034
P
CCCCCCCCC
CCCCC
7.0.A.18.2.6.A8.2.6.B8.2.5.A8.2.5.A8.2.5.A8.2.5.A8.2.6.A8.2.6.B8.2.6.B8.2.6.B8.2.5.A8.2.6.A8.2.5.A8.2.6.B8.2.6.B8.2.6.B8.2.6.B
25
252525252525252525
2525252525
2267 Main SteamIsolation ValveAO2-203-1A
26342
26345
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
36
36
2268 Main SteamIsolation ValveAO2-203-1B
26356
26359
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
36
36
2269 Main SteamIsolation ValveAO2-203-1C
26370 C 8.2.5.A8.2.6.A8.2.6.B
36
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-51
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
26373 C 8.2.5.A8.2.6.A8.2.6.B
36
2270 Main SteamIsolation ValveAO2-203-1D
26384
26387
C
C
8.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.6.A8.2.6.B
36
36
2271 Main SteamIsolation ValveAO2-203-2A
26349
26375263506725626348
2638026379
C
CCCC
CC
7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A
36
36363636
3636
2272 Main SteamIsolation ValveAO2-203-2B
26389263646725626363
263672634426362
CCCC
CCC
8.2.5.A8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A7.0.A.18.2.5.A8.2.6.A8.2.6.B
36363636
363636
DRESDEN 2&3 AMENDMENT 19JUNE 2013
A-52
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
2273 Main SteamIsolation ValveAO2-203-2C
26376
26372263786725726377
263942639367267
C
CCCC
CCC
7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A7.0.A.18.2.5.B8.2.6.A8.2.6.B
36
36363636
363636
2274 Main SteamIsolation ValveAO2-203-2D
26390
26386263926725726391
2635826347
C
CCCC
CC
7.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A7.0.A.17.0.A.18.2.5.A8.2.6.A8.2.6.B8.2.5.A8.2.5.A
36
36363636
3636
32 4160-V Buses 33,33-1, 34, 34-1,
Main Feed Breakers152-3310 and
152-3323
30632
30850
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
32
32
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-53
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
33 4160-V Bus 33-12/3 DG Feed Brkr
152-3333
30855
30626
20999
20445
C
C
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B
32
32
32
32
310 480-V Transformers38&39
Buses 38&39 MainBrkrs 152-3325
(Note 52)
30866
30867
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
32
32
310 480-V Transformers38&39
Buses 38&39 MainBrkrs 252-MF38
(Note 54)
31350 C 8.2.5.A8.2.6.A
32
312 480-V Transformers38&39 Buses 38&39
Main Breakers252-3938 ControlCables (Note 55)
31494 C 8.2.5.A8.2.6.A
32
312 480-V Transformers38&39 Buses 38&39
Main Breakers252-3839 ControlCables (Note 55)
31350 C 8.2.5.A8.2.6.A
32
323 250 Vdc MCC 2B 3408034081340823408534089340903409134092
PPPPPPPP
8.2.6.A8.2.6.A8.2.6.A8.2.6.A8.2.6.A8.2.6.A8.2.6.A8.2.6.A
55555555
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-54
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
3027 Auto BlowdownPart I Ckt. A
(Note 27)
35054
32604
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
32
3232
3028 Auto BlowdownPart II, Ckt. A
(Note 28)
33920 C 8.2.5.A8.2.6.A
32
3007 LPCI Sys. ICkt. A (Note 7)
30227
30828
30815
30820
32606
32747
79055
C
C
C
C
P
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.6.B
32
32
32
32
32
32
32
3009 LPCI Sys. IICkt. A (Note 9)
79065 C 8.2.6.A8.2.6.B
88
3011 Core SpraySys. I (Note 11)
30864
32606
C
P
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
32
32
3027 Auto BreakdownPart I, Ckt. A
(Note 27)
35054
32604
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
21
21
3028 Auto BreakdownPart II, Ckt. A
(Note 28)
33920
32614
C
C
8.2.5.A8.2.6.A8.2.5.A8.2.6.A
21
21
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-55
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
3375 CRD Discharge Valve MO2-0301-2A
69409 P 8.2.2.A8.2.5.B8.2.5.A
41
3376 CRD Discharge Valve MO2-0301-2A
69410 C 8.2.2.A8.2.5.B8.2.5.A
41
3377 CRD Discharge Valve MO2-0301-2A
69411 C 8.2.5.A 41
3378 CRD Discharge Valve MO2-0301-2B
69412 C 8.2.5.A 41
3379 CRD Discharge Valve MO2-0301-2B
69413 P 8.2.2.A8.2.5.A8.2.5.B
41
DRESDEN 2&3 AMENDMENT 13JUNE 2001
A-56
TABLE A-6
FIRE AREA TB-IItem No. Equipment
CableDiscrepancy
CableType
Location ofCable by Zone(s) Resolution
3380 CRD Discharge Valve MO2-0301-2B
Isolation Condenser Makeup Pump
2/3-43122A
Isolation Condenser Makeup Pump
2/3-43123B
Clean Demineralized Tank Transmitter
2/3-3441-201
69414
69906
69907
69916
69917
69908
69909
69918
69919
79517
C
C
C
C
C
C
C
C
C
C
8.2.2.A8.2.5.B8.2.6.A
8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A
8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A8.2.5.A8.2.6.A
8.2.5.A
41
43
43
43
43
43
43
43
43
44
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-57
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
226 RB 125 Vdc Dist. Pnl. 2 24196 24197
P P
8.2.5.C 8.2.5.C
37 37
233 250 Vdc MCC 2B 34080 34081 34082 34085 34089 34090 34091 34092
P P P P P P P P
8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C
5 5 5 5 5 5 5 5
323 250 Vdc MCC 3B 24080 24081 24082 24085 24089 24090 24091 24092
P P P P P P P P
8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C
5 5 5 5 5 5 5 5
342 Target Rock Valve 3-203-3A
33673
34839
C*
C*
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
1
1
343 Electromatic Relief Valve 3-203-3B
34845
34840
C*
C*
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
1
1
344 Electromatic Relief Valve 3-203-3C
34849
34844
C*
C*
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
1
1
345 Electromatic Relief Valve 3-203-3D
33674
34845
C*
C*
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
1
1
* Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-58
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
346 Electromatic Relief Valve 3-203-3E
33674
34849
C*
C*
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
1
1
213 480-V Transformers 28&29 Buses SES 28 & 29 Main Brkr 252-MF 29 (Note 53)
21400 21401
C C
8.2.6.C 8.2.6.C
11
215 480-V MCC 28-1 21358 C 8.2.5.C 16
219 480-V MCC 29-2 69715 69717 69718 69719
P P P P
8.2.5.C 8.2.5.C 8.2.5.C 8.2.5.C
42 42 42 42
* Energizes Valve
DRESDEN 2&3 AMENDMENT 14 JUNE 2003
A-59
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
226 RB 125V DC Dist. Pnl 2
24196 24197
P P
8.2.5.C 8.2.5.C
37 37
234 Isolation Condenser Valve MO2-1301-2
23778 C 8.2.6.C
5
235 Isolation Condenser Valve MO2-1301-3
23758 C 8.2.6.C 5
237 Isolation Condenser Valve MO2-1301-10
65530 65128
C C
8.2.5.C 8.2.5.C
5 5
240 Isolation Condenser Valve MO2-4102
65529 65129
C C
8.2.5.C 8.2.5.C
5 5
3201 2/3 DG Control, Metering, & Excitation
38485 C 8.2.5.C 23
3202 2/3 DG Room Supply Fan 2/3-5790
22993 C
8.2.5.C 7
3203 2/3 DG Cooling Water Pump 2/3-3903B
75306 32395
P C
8.2.5.C 8.2.5.C
23 23
2009 LPCI, Sys. II, Ckt. A (Note 9)
23954 22743 22738 22950 22724
C C C C C
8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C
14 14 14 14 14
2012 Core Spray, Sys. II (Note 12)
22819 C 8.2.6.C 14
2017 PCIS, Ckt. A (Note 17)
26281 C 8.2.6.C 10
2018 PCIS Ckt. B (Note 18)
26283 C 8.2.6.C 10
2024 PCIS Sensor & Trip Logic, Ckt. A (Note 24)
24013 24020 23764 24011
C C C C
8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C
10 10 10 10
2025 PCIS Sensor & Trip Logic, Ckt. B (Note 25)
24014 24021 23824 24012
C C C C
8.2.6.C 8.2.6.C 8.2.6.C 8.2.6.C
10 10 10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-60
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2036 PCIS Main Steam Isol. Ckt. A - Outboard (Note 36)
20687 P 8.2.6.C 10
2039 3039
Fire Protection CO2 System (Note 39)
35029 25004 25024
35024 35025
24172
20702 20703 65829 25039 35040
25044 35034
25035 35004 34172 20704
C C C
C C
P
C C C C C
C C
C C P C
8.2.5.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.6.C 8.2.5.C 8.2.5.C 8.2.5.C
25 25 25
25 25
25
25 25 25 25 25
25 25
25 25 25 25
2273 Main Steam Isolation Valve AO2-203-2C
67267 C 8.2.5.C 8.2.6.C
36
326 RB 125-Vdc Dist Pnl. 3 Feed
34196 34197
P P
8.2.5.C 8.2.5.C
23 23
32 4160-V Buses 33, 33-1 Main Feed Brkrs. 152-3310 and 152-3323 (Note 45)
30627 30628 30629 30630 30851 30850
P P P C C C
8.2.5.C 8.2.5.C 8.2.5.C 8.2.5.C 8.2.5.C 8.2.5.C 8.2.6.C
23 23 23 11 11 11
33 4160-V Bus 33-1 2/3 DG Feed Breaker 152-3333
30855 C 8.2.5.C 8.2.6.C
11
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-61
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
310 480-V Transformers 38&39-Buses 38&39 Main Brkrs 152-3325 (Note 52)
30866
30867
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
11
11
310 480-V Transformers 38&39-Buses 38&39 Main Brkrs. 152-MF 38 (Note 54)
31350 C 8.2.5.C 8.2.6.C
11
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-62
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
312 480-V Transformers 38&39 - Buses 38&39 Main Breakers 252-3839 Control Cables (Note 55)
31350 C 8.2.5.C 8.2.6.C
30
317 480-V MCC 38-3 31371
31372
31373
31374
P
P
P
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
23
23
23
23
333 Isolation Condenser Valve MO3-1301-1
32559 C 8.2.5.C 8.2.6.C
4
336 Isolation Condenser Valve MO3-1301-4
32576 C 8.2.5.C 8.2.6.C
4
338 339
Isolation Condenser Valves AO3-1301-17&20
36273
36274
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
6
6
3007 LPCI, Sys. I Ckt. A (Note 7)
30226
30284
75851 75142 30825
32547
30813
32696 75853
C
C
C C C
C
C
C C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.5.C
14
14
14 14 14
14
14
14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-63
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3007 (Cont'd)
30228
32733
C
C
8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
14
14
3011 Core Spray Sys. I (Note 11)
32811
75142
75851
32809
32812
75853
C
C
C
C
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C
14
14
14
14
14
14 3017 PCIS, Ckt. A
(Note 17) 36277
36279
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
10
10
3018 PCIS Ckt. B (Note 18)
36280 C 8.2.5.C 8.2.6.C
10
3022 Main Steam Isolation Ckt A Inbd (Note 22)
36342
36356
36370
36384
34085
C
C
C
C
P
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.6.C
10
10
10
10
10 3023 Main Steam Isolation
Ckt. B Inboard (Note 23)
36345
36359
36373
C
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
10
10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-64
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3023 (Cont'd)
36387 C 8.2.5.C 8.2.6.C
10
3024 Sensor & Trip System, Ckt. A (Note 24)
34013
33840 34000
33764
34020
34011
C
C C
C
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
10
10 10
10
10
10
3025 PCIS Sensor & Trip System, Ckt. B (Note 25)
34014 33841 34001
34021
33824
C C C
C
C
8.2.6.C 8.2.5.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
10 10 10
10
10
3027 Auto Blowdown, Part 1, Ckt. A
35050
33934
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
21
21
3028 Auto Blowdown, Part 2, Ckt. A (Note 28)
33934 C 8.2.5.C 8.2.6.C
21
3062 4-kV SWGR Bus 33-1 UV Relay (Note 62)
77430 77402
C C
8.2.5.C 8.2.5.C
26 26
3367 Main Steam Isolation Valve AO3-203-1A
36345
36342
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
36
36
3368 Main Steam Isolation Valve AO3-203-1B
36359
36356
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-65
TABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3369 Main Steam Isolation Valve AO3-203-1C
36373
36370
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
36
36
3370 Main Steam Isolation Valve AO3-203-1D
36387
36384
C
C
8.2.5.C 8.2.6.C 8.2.5.C 8.2.6.C
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-66
ABLE A-7
FIRE AREA TB-II
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3381 CRD Discharge Valve MO2-0301-2B
69413 C 8.2.6.C 41
3382 CRD Discharge Valve MO2-0301-2B
69414 P 8.2.6.C 41
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-67
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 322 250Vdc MCC 3A 34179
34180 34181 34182
P P P P
1.1.1.4 1.1.1.4 1.1.1.4 1.1.1.4
5 5 5 5
323 250Vdc MCC 3B 24080
24081
24082
24085
24089
24091
24092
P
P
P
P
P
P
P
1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4 1.1.1.3 1.1.1.4
5
5
5
5
5
5
5
342 Target Rock Valve 3-203-3A
33673 34839 30280
30281
C* C* P
P
8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
6.1 8.2.6.D 8.2.6.E
1 1 1
1
343 Electromatic Relief Valve 3-203-3B
34845 34840 30280
30281
C* C* P
P
8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
6.1 8.2.6.D 8.2.6.E
1 1 1
1
* Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-68
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 344 Electromatic Relief
Valve 3-203-3C 34849 34844 30280
30281
C* C* P
P
8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
6.1 8.2.6.D 8.2.6.E
1 1 1
1
345 Electromatic Relief Valve 3-203-3D
33674 34845 30280
30281
C* C* P
P
8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
6.1 8.2.6.D 8.2.6.E
1 1 1
1
346 Electromatic Relief Valve 3-203-3E
33674 34849 30280
30281
C* C* P
P
8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
6.1 8.2.6.D 8.2.6.E
1 1 1
1
333 Isolation Condenser Valve MO3-1301-1
32559 C
8.2.4
4
334 Isolation Condenser Valve MO3-1301-2
33778 C 8.2.4 8.2.5.E 8.2.6.D
5
335 Isolation Condenser Valve MO3-1301-3
33758 C 8.2.4 8.2.5.E 8.2.6.D
5
336 Isolation Condenser Valve MO3-1301-4
32576 C 8.2.4 4
* Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-69
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 337 Isolation Condenser
Valve MO3-1301-10 75331
75826
C
C
8.2.4 8.2.5.E 8.2.4
5
5
338 339
Isolation Condenser Valves AO3-1301-17&20
36273 36274 36275
36276
C C C
C
8.2.4 8.2.4 8.2.4
8.2.5.E 8.2.5.D 8.2.4
8.2.5.E 8.2.6.D
6 6 6
6
340 Isolation Condenser Valve MO3-4102 Isolation Condenser Supply Isolation Vlv. MO3-4399-74
75332
75827
39435
C
C
C
8.2.4 8.2.5.E 8.2.4
8.2.6.A 8.2.6.B 8.2.4
5
5
5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-70
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 2039 34172 P 6.1 25 2039 3039
Fire Protection CO2 System (Note 39)
34172
24172 35000 20702 20704 20701 20703 25045 35009 35010 35014
35019 35040 25044 25024 35015
35004 35025 35034 25004
P
P C C C C C C C C C
C C C C C
C C C C
6.1 8.2.5.E 8.2.6.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.5.E 8.2.6.E 8.2.6.E 8.2.6.D 8.2.6.D 8.2.5.E 8.2.5.E 8.2.6.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.6.E
25
25 25 25 25 25 25 25 25 25 25
25 25 25 25 25
25 25 25 25
3201 2/3 DG Control (Note 49)
38485 C
8.2.5.E 8.2.6.E
2,3,7,9
3203 2/3 DG Cooling Water Pump 2/3 3903B
32394
32395
33792
P
C
C
8.2.4 8.2.5.E 8.2.6.E 8.2.5.E 8.2.6.E 8.2.4
8.2.5.E 8.2.6.D
7,22
7
7
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-71
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3007 LPCI Sys. I Ckt. A
(Note 7) 32951
30226 30284 75142 75194
30825 32547 30227 30828 30813 32606 32696 30228 30830
30815 32733 30820 32747
P
C C C P
C C C C C P C C C
C C C C
6.1 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-72
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3009 LPCI Sys. II
Ckt. A (Note 9) 32952
30225
32724
75875
75149 75144
P
C
C
C
C P
6.1 8.2.4
8.2.5.E 8.2.6.D 8.2.6.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.4 6.1
8.2.5.E 8.2.6.E
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-73
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3009 (Cont'd)
75872
33958
33950
32738
33954
32743
32810
33977
30224
30840
75149
C
C
C
C
C
C
C
C
C
C
C
8.2.4 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.6.E 8.2.4
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-74
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3011 Core Spray, Sys. I
(Note 11) 32951
30864 32811 32606 75142 32809 32812 75194
P
C C P C C C P
6.1 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4 8.2.4
8.2.5.E 8.2.6.E
8,2,3,7,9
8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9 8,2,3,7,9
3012 Core Spray, Sys. II (Note 12)
32952
30287
75875
75877
32810
32819
33977
75144
75149
P
C
C
C
C
C
C
P
C
6.1 8.2.4
8.2.5.E 8.2.6.D 8.2.6.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.4
8.2.5.E 6.1
8.2.4 8.2.5.E 8.2.4
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
8,2,3,7,9
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-75
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3017 PCIS Ckt. A
(Note 17) 34176
36277 36279 36281
P
C C C
6.1 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4
8.2.5.E 8.2.6.D
10
10 10 10
3018 PCIS Ckt. B (Note 18)
34211
36278
36280 36283
P
C
C C
6.1 8.2.4
8.2.5.E 8.2.6.D 8.2.6.E 8.2.4
8.2.5.E 8.2.4 8.2.4
10
10
10 10
8.2.5.E 8.2.6.D
3020 Process Radiation Monitoring System Ckt. A (Note 20)
34176 P 6.1 8.2.4
8.2.5.E 8.2.6.E
10
3021 Process Radiation Monitoring System Ckt. B (Note 21)
34211 P 6.1 8.2.4
8.2.5.E 8.2.6.D 8.2.6.E
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-76
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3022 Main Steam Isolation
Ckt. A Inbd (Note 22)
34176
36342 36356 36370 36384 34085
P
C C C C C
6.1 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4 6.1
8.2.6.D 8.2.6.E
10
10 10 10 10 10
3023 Main Steam Isola- tion Ckt. B Inbd (Note 23)
36345 36359 36373 36387
C C C C
8.2.4 8.2.4 8.2.4 8.2.4
10 10 10 10
3024 PCIS Sensor & Trip System Ckt. A (Note 24)
33840
33780
33781
33784
33785
C
C
C
C
C
8.2.4 8.2.5.D 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.6.E
10
10
10
10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-77
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3024 (Cont'd)
34000 33786
33828
33829
33834
34013 34020 33764 34011
C C
C
C
C
C C C C
8.2.6.D 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.4 8.2.4 8.2.4 8.2.4
10 10
10
10
10
10 10 10 10
3025 Sensor & Trip System Ckt. B (Note 25)
33841
34001
34014 33769
33770
33771
33773
34021 33824
C
C
C C
C
C
C
C C
8.2.5.D 8.2.6.D 8.2.4
8.2.5.D 8.2.6.D 8.2.4 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.5.E 8.2.6.D 8.2.4 8.2.4
10
10
10 10
10
10
10
10 10
3027 Auto Blowdown Part 1 Ckt. A (Note 27)
33927
33934 35050 35054 32604
P
C C C C
6.1 8.2.4
8.2.5.E 8.2.6.E 8.2.4 8.2.4 8.2.4 8.2.4
21
21 21 21 21
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-78
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3028 Auto Blowdown
Part II Ckt. A (Note 28)
33927
32952
33934 33920 32614
PR
PM
C C C
6.1 8.2.5.E 8.2.6.E 8.2.4 6.1
8.2.6.D 8.2.6.E 8.2.5.E 8.2.4 8.2.4 8.2.4 8.2.4
21
21
21 21 21
3029 Auto Blowdown Part II Ckt. B (Note 29)
32952
33916
PM
C
6.1 8.2.4
8.2.6.D 8.2.6.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D
21
21
3036 PCIS Main Steam Isolation Ckt. A Outbd (Note 36)
34211
36349
36350 36362
36364 36376
36378 36390
P
C
C C
C C
C C
6.1 8.2.4
8.2.5.E 8.2.6.D 8.2.6.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.4
10
10
10 10
10 10
10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-79
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3036 (Cont'd)
36392 36375 36389 36372 36386
C C C C C
8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E
10 10 10 10 10
3037 PCIS Main Steam Isolation Ckt. B Outbd (Note 37)
36379 36344 36393 36347 36380 36375 36348
36363
36367 36389 36377
36394 36372 36391
36358
C C C C C C C
C
C C C
C C C
C
8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.4
8.2.5.E 8.2.5.D 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E
10 10 10 10 10 10 10
10
10 10 10
10 10 10
10
3204 Diesel Generator 2/3 Fuel Oil Transfer Pump 2/3-5203
33797 C 8.2.4 8.2.5.E 8.2.6.D
7, 9
3367 Main Steam Isolation Valve AO3-203-1A
36345 36342
C C
8.2.4 8.2.4
36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-80
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3368 Main Steam
Isolation Valve AO3-203-1B
36359 36356
C C
8.2.4 8.2.4
36 36
3369 Main Steam Isolation Valve AO3-203-1C
36373 36370
C C
8.2.4 8.2.4
36 36
3370 Main Steam Isolation Valve AO3-203-1D
36387 36384
C C
8.2.4 8.2.4
36
3371 Main Steam Isolation Valve AO3-203-2A
36350 36349
36379 36375 36348
36380
C C
C C C
C
8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E
36 36
36 36 36
36
3372 Main Steam Isolation Valve AO3-203-2B
36363
36367 36389 36344 36362
36364
C
C C C C
C
8.2.4 8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E
36
36 36 36 36
36
3373 Main Steam Isolation Valve AO3-203-2C
36394 36377
36393 36376
C C
C C
8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.4
8.2.5.E
36 36
36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-81
TABLE A-8
FIRE AREA TB-III
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 3373 (Cont'd)
36372 36378
C C
8.2.6.D 8.2.5.E 8.2.5.E
36 36
3374 Main Steam Isolation Valve AO3-203-2D
36390
36386 36392 36391
36358 36347
C
C C C
C C
8.2.4 8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E 8.2.4
8.2.5.E 8.2.6.D 8.2.5.E 8.2.5.E
36
36 36 36
36 36
3383 CRD Discharge Valve MO3-0301-2A
79409 P 8.2.2.B 8.2.5.D 8.2.5.E 8.2.6.E
41
3384 CRD Discharge Valve MO3-0301-2A
79410 C 8.2.2.B 8.2.5.D 8.2.5.E 8.2.6.E
41
3385 CRD Discharge Valve MO3-0301-2A
79411 C 8.2.6.E 8.2.5.E 8.2.4
41
3386 CRD Discharge Valve MO3-0301-2B
79412 P 8.2.5.B 8.2.5.D 8.2.5.E
41
3387 CRD Discharge Valve MO3-0301-2B
79413 C 8.2.2.B 8.2.5.D 8.2.6.E
41
3388 CRD Discharge Valve MO3-0301-2B
79414 C 8.2.6.E 8.2.5.E 8.2.4
41
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-82
TABLE A-9
FIRE AREA TB-IV
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
There are no cable discrepancies in this fire area.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-83
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
342 Target Rock Valve 3-203-3A
33673 34839
C* C*
6.2 2.0
1 1
343 Electromatic Relief Valve 3-203-3B
34845 34840
C* C*
2.0 2.0
1 1
344 Electromatic Relief Valve 3-203-3C
34849 34844
C* C*
2.0 2.0
1 1
345 Electromatic Relief Valve 3-203-3D
33674 34845
C* C*
6.2 2.0
1 1
346 Electromatic Relief Valve 3-203-3E
33674 34849
C* C*
6.2 2.0
1 1
243 Electromatic Relief Valve 2-203-3B
66964
23901
25066
25069
20271
23927 23904 66966
C*
C*
C*
C*
P
P P
C*
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 6.2 6.2
1
1
1
1
1
1 1 1
244 Electromatic Relief Valve 2-203-3C
23905
23917
23943
20272
23927 23904 66965
66967
C*
C*
C*
P
P P
C*
C*
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2
1
1
1
1
1 1 1
1 * Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-84
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
245 Electromatic Relief Valve 2-203-3D
23906
25055
25074
20272
23927 23904
C*
C*
C*
P
P P
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 6.2
1
1
1
1
1 1
246 Electromatic Relief Valve 2-203-3D
23902
23940
25073
20272
23927 23904
C*
C*
C*
P
P P
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 6.2
1
1
1
1
1 1
242 Target Rock Valve 2-203-3A
25061
25062
25065
25271
23927 23904
C*
C*
C*
P
P P
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 6.2
1
1
1
1
1 1
22 4160-V Bus 23&23-1 Main Feed Breakers 152-2302 and 152-2329 (Note 45)
20631
20632
20850
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2
11
11
11
* Energizes Valve
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-85
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
23 4160-V Bus 23-1 2/3 DG Feed Brkr 152-2333 (Note 48)
20441
20853
30999
20855
20626
20442
20445
C
C
C
C
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
11,12
11,12
11,12
11,12
11,12
11,12
11,12
210 480-V Transformers 28&29 Buses 28&29 Main Brkrs 152-2327 (Note 52)
20866
20867
C
C
2.0 6.2 2.0 6.2
11
11
210 480-V Transformers 28&29 Buses 28&29 Main Brkrs 252-MF28 (Note 54)
21396 21498
21499
C C
C
2.0 2.0 6.2 2.0 6.2
11 11
11
213 480-V Transformers 28&29 Buses 28&29 Main Brkrs 252-MF29 (Note 53)
21400 21401
C C
2.0 2.0
11 11
212 480-V Transformers 28&29 Buses 28&29 Main Brkrs 252-2928
21494 C 2.0 11
212 480-V Transformers 28&29 Buses 28&29 Main Brkr 252-2829
21396 C 2.0 11
233 Isolation Condenser Valve MO2-1301-1
22559
24135
C
C
2.0 6.2 2.0 6.2
4
4
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-86
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
234 Isolation Condenser Valve MO2-1301-2
24122
23778
C
C
2.0 6.2 2.0
5
5
235 Isolation Condenser Valve MO2-1301-3
23758 24123
C C
2.0 2.0 6.2
5 5
236 Isolation Condenser Valve MO2-1301-4
22576
24136
C
C
2.0 6.2 2.0 6.2
4
4
237 Isolation Condenser Valve MO2-1301-10
65128 C 2.0 6.2
5
238 239
Isolation Condenser Valves AO2-1301-17&20 (Note 26)
22848
26273
24098 24118
24119
26274
67258 24068
26275 26276 67252
27196
P
C
C C
C
C
C C
C C C
P
2.0 6.2 2.0 6.2 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2
6
6
6 6
6
6
6 6
6 6 6
6
240 Isolation Condenser Valve MO2-4102
65129 C 2.0 6.2
5
251 Service Water Pump 2A-3901
20660
20661
C
C
2.0 6.2 2.0 6.2
11
11
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-87
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
249 CRD Pump 2A-302-3 Isolation Condenser Supply Isolation Vlv. MO2-4399-74
20683 20684
29435
C C
C
2.0 2.0
2.0 6.2
11 11
5
3201 2/3 DG Control, Excitation, and Metering (Note 49)
20446
20448
20447
20445
32482 20853
20441
20442
22842
C
C
C
C
C C
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2 2.0 6.2 6.2
7,39
7
7
7
7 38
38
7
7
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-88
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2007 LPCI, Sys. I, Ckt. A (Note 7)
22951 20221 20828
22696 20825 22747
22730 20820
22733 20200 20210 20815
20830 20228 20813 20227
22547 20286 65142 65108 20284 20226 22606
69051 69055 65110 65194
P P C
C C C
C C
C C C C
C C C C
C C C C C C C
C C P P
6.2 6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 6.2
14 14 14
14 14 14
14 14
14 14 14 14
14 14 14 14
14 14 14 14 14 14 14
14 14 14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-89
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2009 LPCI, Sys. II, Ckt. A (Note 9)
22952
20222 23969 22673
23977
22810
23954
22726 22745
22749 22743
20252 20260 20819
20840 20224
22731
22738
20223
22950
23958
20285
65127 69065
P
P P C
C
C
C
C C
C C
C C C
C C
C
C
C
C
C
C
C C
2.0 6.2 6.2 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2
6.2 2.0 6.2
14
14 14 14
14
14
14
14 14
14 14
14 14 14
14 14
14
14
14
14
14
14
14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-90
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2009 (cont'd)
65111
65144
22724
20225
20960
P
P
C
C
P
6.2
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
14
14
14
14
14
2011 Core Spray, Sys. I (Note 11)
20221 22606
22811 65142 65108 22809 22812 22808 20864
65110 65194
P P
C C C C C C C
P P
6.2 2.0 6.2 6.2 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2
14 14
14 14 14 14 14 14 14
14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-91
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2012 Core Spray, Sys. II (Note 12)
20222 20287
65149 22952
22810
22819
23977
22816 20863
20960
23969 65127 65111
65144
P C
C C
C
C
C
C C
P
P C P
P
6.2 2.0 6.2 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 6.2 2.0 6.2 2.0 6.2 6.2 6.2 2.0 6.2 2.0 6.2
14 14
14 14
14
14
14
14 14
14
14 14 14
14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-92
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2017 PCIS, Ckt. A (Note 17) 22409 24086
24096
25187 24176
26277
24113
26281 24110
26279 24211 24098
P C
C
C P
C
C
C C
C P C
2.0 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 2.0 6.2
10 10
10
10 10
10
10
10 10
10 10 10
2018 PCIS, Ckt. B (Note 18) 22409 24115
26283 24111
26280 24099 24097
26278 24211
P C
C C
C C C
C P
2.0 2.0 6.2 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0
10 10
10 10
10 10 10
10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-93
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2019 PCIS, Reset Ckt. (Note 19)
22482
22472
24047
24048
22481
22798 22477
22799 27291
23412
P
P
C
C
C
C C
C P
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 2.0 6.2 2.0
10
10
10
10
10
10 10
10 10
10
2020 Process Radiation Monitoring System, Ckt. A (Note 20)
25187 24176
24086
P P
P
2.0 2.0 6.2 2.0 6.2
10 10
10
2021 Process Radiation Monitoring System, Ckt. B (Note 21)
22409 24211
P P
2.0 2.0
10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-94
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2022 Main Steam Isolation Ckt. Inbd Ckt. A (Note 22)
24086
24025
26342
67250
26356
26370
67251
26384
22470
26354 25187 24176
P
C
C
C
C
C
C
C
C
C P P
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 2.0 6.2
10
10
10
10
10
10
10
10
10
10 10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-95
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2023 Main Steam Isolation Ckt. Inbd Ckt. B (Note 23)
22848
26345
67250
26359
67251
26373
26387
22488
26368 24058
22849
22470
26354
P
C
C
C
C
C
C
P
P P
P
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0
10
10
10
10
10
10
10
10
10 10
10
10
10
2024 PCIS Sensor & Trip Logic, Ckt. A (Note 24)
26312 26320 24013 23840 24000 24020 23764 24011 67316
24050 24051 27239
C C C C C C C C C
C C P
2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 6.2 2.0 2.0 2.0 6.2
10 10 10 10 10 10 10 10 10
10 10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-96
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2025 PCIS Sensor & Trip Logic, Ckt. B (Note 25)
26313 26321 24014
23841 24001 27196
24021
23824 24012 67317
24052 24053 27241
C C C
C C C
C
C C C
C C P
2.0 2.0 2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2 2.0 2.0 2.0 6.2 2.0 2.0 2.0 6.2
10 10 10
10 10 10
10
10 10 10
10 10 10
2027 Auto Blowdown, Part 1 (Note 27)
23927 23904 25050
25054
22816 22604
P P C
C
C C
6.2 6.2 2.0 6.2 2.0 6.2 6.2 2.0 6.2
21 21 21
21
21
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-97
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2028 Auto Blowdown, Part 2, Ckt. A (Note 28)
20273 22952
23969 20222 20960
23904 23927 25053 23920
22816 20738 23916
P P
P P P
P P C C
C C C
6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 2.0 6.2
21 21
21 21 21
21 21 21 21
21 21 21
2029 Auto Blowdown, Part 2, Ckt. B (Note 29)
23969 20222 20960
23916
20738 22952
22808 22614
P P P
C
C P
C C
6.2 6.2 2.0 6.2 2.0 6.2 6.2 2.0 6.2 6.2 2.0 6.2
21 21 21
21
21 21
21 21
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-98
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2036 PCIS Main Steam Isol. Ckt. A Outbd. (Note 36)
22409 20687 26355 22471 24029
26349 67256 26362 26376 67257 26390 24211
P P C C C
C C C C C C P
2.0 2.0 2.0 2.0 2.0 6.2 2.0 2.0 2.0 2.0 2.0 2.0 2.0
10 10 10 10 10
10 10 10 10 10 10 10
2037 PCIS Main Steam Isol. Ckt. B Outbd (Note 37)
22848
22849
22488
24058
26368 24066
26305 22489 26348 67256 26363 26377 67257 26391
P
P
P
P
P C
C C C C C C C C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
10
10
10
10
10 10
10 10 10 10 10 10 10 10
2061 4-kv SWGR Bus 23 UV Relay (Note 61)
67536 24213
P P
2.0 2.0
26 26
2062 4-kv SWGR Bus 23-1 UV Relay (Note 62)
67431 24213
C P
6.2 2.0
26 26
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-99
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
2267 Main Steam Isolation Valve AO2-203-1A
26242
26345
67250
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
2268 Main Steam Isolation Valve AO2-203-1B
26356
26359
C
C
2.0 6.2 2.0 6.2
36
36
2269 Main Steam Isolation Valve AO2-203-1C
26370
26373
67251
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
2270 Main Steam Isolation Valve AO2-203-1D
67251
26384
26387
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
2271 Main Steam Isolation Valve AO2-203-2A
26349 67256 26348
C C C
2.0 2.0 2.0
36 36 36
2272 Main Steam Isolation Valve AO2-203-2B
67256 26363 26362
C C C
2.0 2.0 2.0
36 36 36
2273 Main Steam Isolation Valve AO2-203-2C
26376 67257 26377 67267
C C C C
2.0 2.0 2.0 2.0 6.2
36 36 36 36
2274 Main Steam Isolation Valve AO2-203-2D
26390 67257 26391
C C C
2.0 2.0 2.0
36 36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-100
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
32 4160-V Buses 33, 33-1, 34, 34-1 Main Feed Breakers 152-3310 and 152-3323 (Note 45)
30631
30632 30850
C
C C
2.0 6.2 2.0 2.0
11
11 11
33 4160-V Bus 33-1 2/3 DG Feed Breaker 152-3333 (Note 48)
30626 30855 20999
67440
20445
C C C
C
C
2.0 2.0 2.0 6.2 2.0 6.2 2.0 6.2
11,12 11,12 11,12
11,12
11,12
310 480-V Transformers 38&39 Buses 38&39 Main Brkrs 152-3325 (Note 52)
30866 C 2.0 11
310 480-V Transformers 38&39 Buses 38&39 Main Brkrs 252-MF38 (Note 54)
30867
31350
C
C
2.0
2.0
11
11
313 480-V Transformers 38&39 Buses 38&39 Main Brkrs 252-MF39 (Note 53)
31400
31401
C
C
2.0 6.2 2.0 6.2
11
11
312 480-V Transformers 38&39 Buses 38&39 Brkrs 252-3938 (Note 55)
31494 C 2.0 11
312 480-V Transformers 38&39 Buses 38&39 Main Brkrs 252-3839 (Note 55)
31396
31350
C
C
2.0 6.2 2.0
11
11
313 480 V-Transformers 38&39 Buses 38&39 Main Breakers 152-3426 (Note 51)
30940
30941
C
C
2.0 6.2 2.0 6.2
11
11
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-101
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
333 Isolation Condenser Valve MO3-1301-1
32559 34135
C C
2.0 2.0 6.2
4 4
334 Isolation Condenser Valve MO3-1301-2
33778
34122
C
C
2.0 6.2 2.0 6.2
5
5
335 Isolation Condenser Valve MO3-1301-3
33758
34123
C
C
2.0 6.2 2.0 6.2
5
5
336 Isolation Condenser Valve MO3-1301-4
32576 34136
C C
2.0 2.0 6.2
4 4
337 Isolation Condenser Valve MO3-1301-10
75826 C 2.0 6.2
5
338 339
Isolation Condenser Valves AO3-1301-17&20
34098 34118
36273 36274 36275
36276
32848
34119
75803
75809
34068
C C
C C C
C
P
C
C
C
C
6.2 2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
6 6
6 6 6
6
6
6
6
6
6
340 Isolation Condenser Valve MO3-4102
75827 C 2.0 6.2
5
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-102
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
351 Service Water Pump 3A-3901
30660
30661
C
C
2.0 6.2 2.0 6.2
11
11
349 CRD Pump 3A-302-3 30683
30684
C
C
2.0 6.2 2.0 6.2
11
11
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-103
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3007 LPCI, Sys. I Ckt. A (Note 7) Isolation Condenser Supply Isolation Vlv. MO3-4399-74
32951 30221 32606
30226
39435 30284 75142 80075 30286 30825 32547 30227
30828
30813 32696
30805 30228 30830 30815
30200 30210 32733 32730 30820
32747
79055 75194
P P P
C
C C C C C C C C
C
C C
C C C C
C C C C C
C
C P
6.2 6.2 2.0 6.2 6.2
2.0 6.2 6.2 6.2 6.2 6.2 6.2 2.0 6.2 2.0 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 6.2 2.0 6.2 2.0 6.0 6.2 6.2
14 14 14
14
5
14 14 14 14 14 14 14
14
14 14
14 14 14 14
14 14 14 14 14
14
14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-104
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3009 LPCI, Sys. II, Ckt. A (Note 9)
32952 30222 30960
30225 32724 75149 80076 30285 33958 32950
30223 75144
P P P
C C C C C C C
C P
6.2 6.2 2.0 6.2 6.2 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2
14 14 14
14 14 14 14 14 14 14
14 14
32731
32738 32726 30224 30840 30819
30252 30260 32743 32749 32745
33954 32810
33977 32673
33969 79065
C
C C C C C
C C C C C
C C
C C
P C
2.0 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2 6.2
14
14 14 14 14 14
14 14 14 14 14
14 14
14 14
14 14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-105
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3011 Core Spray, Sys. I (Note 11)
32951 32811
75142 80075 32809 32812 32808 30864
30221 32606
75194
P C
C C C C C C
P P
P
6.2 2.0 6.2 6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2
14 14
14 14 14 14 14 14
14 14
14
3012 Core Spray, Sys. II (Note 12)
32952 30960
30222 33969 30287
75149 80076 32810
32819 32816 33977 30863
75144
P P
P P C
C C C
C C C C
P
6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2 6.2
14 14
14 14 14
14 14 14
14 14 14 14
14
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-106
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3017 PCIS, Ckt. A (Note 17)
34176
34086 35187 34096
36277 34098 34110
36279 34113
36281
P
P P C
C C C
C C
C
2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2
10
10 10 10
10 10 10
10 10
10
3018 PCIS Ckt. B (Note 18)
34211
32409
34097
36278
P
P
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
10
10
10
10
34099 34111
36280 34115
36283
C C
C C
C
6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2
10 10
10 10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-107
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3019 PCIS Reset Ckt. (Note 19)
32472
32482 32481 32798
34047
34048
32477 32799
37291
P
P C C
C
C
C C
P
2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0 6.2 2.0 6.2
10
10 10 10
10
10
10 10
10
3020 Process Radiation Monitoring System Ckt. A (Note 20)
34086 35187 34176
77360
P P P
C
2.0 2.0 2.0 6.2 2.0 6.2
10 10 10
10
3021 Process Radiation Monitoring System Ckt. B (Note 21)
34211
32409
77361
P
P
C
2.0 6.2 2.0 6.2 2.0 6.2
10
10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-108
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3022 Main Steam Isolation Ckt. A Inbd (Note 22)
34176
34086 35187 34025
32470 36354 36342 36356 36370 36384 75800 75801
P
P P C
C C C C C C C C
2.0 6.2 2.0 2.0 2.0 6.2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
10
10 10 10
10 10 10 10 10 10 10 10
3023 Main Steam Isolation Ckt. B Inbd (Note 23)
32848
34058
32488 36368 36345 36359 36373 32849
36387 75800 75801
P
C
C C C C C P
C C C
2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 2.0 2.0 6.2 2.0 2.0 2.0
10
10
10 10 10 10 10 10
10 10 10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-109
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3024 Sensor & Trip System Ckt. A (Note 24)
37239
34013 33840
34000 33764
34020 34011 77316
34050 34051
P
C C
C C
C C C
C C
2.0 6.2 2.0 2.0 6.2 2.0 2.0 6.2 2.0 2.0 2.0 6.2 2.0 2.0
10
10 10
10 10
10 10 10
10 10
3025 Sensor & Trip System Ckt. B (Note 25)
37241
37196
79070 34014 33841 34001 34021 33824 34012 77317
34052 34053
P
P
C C C C C C C C
C C
2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 6.2 2.0 2.0
10
10
10 10 10 10 10 10 10 10
10 10
3027 Auto Blowdown Part I Ckt. A (Note 27)
33927 35050 35054
33934 32816 32604
P C C
C C C
6.2 6.2 2.0 6.2 6.2 6.2 2.0 6.2
21 21 21
21 21 21
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-110
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3028 Auto Blowdown Part II Ckt. A (Note 28)
33927 30273 32952 33969 30222 30960
35053 33920
33934 32816 32808 32614
PM PR PR PR PR PR
C C
C C C C
6.2 6.2 6.2 6.2 6.2 2.0 6.2 6.2 2.0 6.2 6.2 6.2 6.2 2.0 6.2
21 21 21 21 21 21
21 21
21 21 21 21
3029 Auto Blowdown Part II Ckt. B (Note 29)
32952 33969 30222 30960
33916
30738
P P P P
C
C
6.2 6.2 6.2 2.0 6.2 2.0 6.2 6.2
21 21 21 21
21
21
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-111
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3036 PCIS Main Steam Isolation Ckt. A Outbd (Note 36)
32409
34211
34029
32471
36355
36349
75806
36362
36376
75807
36390
P
P
C
C
C
C
C
C
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
10
10
10
10
10
10
10
10
10
10
10
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-112
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3037 PCIS Main Steam Isol. Ckt. B Outbd (Note 37)
75806
75807
34066
32489
36305
36348
36363
36377
36391
32848
32849
34058
32488 36368
C
C
C
C
C
C
C
C
C
P
P
P
P P
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 2.0
10
10
10
10
10
10
10
10
10
10
10
10
10 10
3062 4-kV SWGR Bus 33-1 UV Relay (Note 62)
77430 C 6.2 26
3203 Diesel Generator 2/3 Cooling Water Pump 2/3-3903B
33792 35393
C C
6.2 6.2
7 7
3204 Diesel Generator 2/3 Fuel Oil Transfer Pump 2/3-5203
33797 C 6.2 7
3205 Diesel Fire Pump 2/3-4101
23729 C 6.2 40
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-113
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3367 Main Steam Isolation Valve AO3-203-1A
36345 36342 75800 32848
34058
32488 36368 34086 34025
36354 32470
C C C P
P
P P P C
C C
2.0 2.0 2.0 2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 6.2 2.0 2.0
36 36 36 36
36
36 36 36 36
36 36
3368 Main Steam Isolation Valve AO3-203-1B
36359 75801 36356 32848
34058
32488 36368 34086 34025
36354 32470
C C C P
P
P P P C
C C
2.0 2.0 2.0 2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 6.2 2.0 2.0
36 36 36 36
36
36 36 36 36
36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-114
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3369 Main Steam Isolation Valve AO3-203-IC
36373 36369
75801 36370 32848
34058
32488 36368 34086 34025
36354 32470
C C
C C P
P
P P P C
C C
2.0 2.0 6.2 2.0 2.0 2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 6.2 2.0 2.0
36 36
36 36 36
36
36 36 36 36
36 36
3370 Main Steam Isolation Valve AO3-203-1D
78501 36387 36384 32848
34058
32488 36368 34086 34025
36354 32470
C C C P
P
P P P C
C C
2.0 2.0 2.0 2.0 6.2 2.0 6.2 2.0 2.0 2.0 2.0 6.2 2.0 2.0
36 36 36 36
36
36 36 36 36
36 36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-115
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3371 Main Steam Isolation Valve AO3-203-2A
36349
75806
36348
34066
32489
32848
32409
34029
36355
32471
36305
C
C
C
C
C
P
P
C
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
36
36
36
36
36
36
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-116
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3372 Main Steam Isolation Valve AO3-203-2B
36363
75806
36362
34066
32489
36305
32848
32409
34029
36355
32471
C
C
C
C
C
C
P
P
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
36
36
36
36
36
36
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-117
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3373 Main Steam Isolation Valve AO3-203-2C
36377
75807
36376
34066
32489
36305
32848
32409
34029
36355
32471
C
C
C
C
C
C
P
P
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
36
36
36
36
36
36
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-118
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3374 Main Steam Isolation Valve AO3-203-2D
36390
75807
36391
34066
32489
36305
32848
32409
34029
36355
32471
C
C
C
C
C
C
P
P
C
C
C
2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2 2.0 6.2
36
36
36
36
36
36
36
36
36
36
36
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-119
TABLE A-10
FIRE AREA TB-V
Item No.
Equipment
Cable Discrepancy
Cable Type
Location of Cable by Zone(s)
Resolution
3389 CRD Discharge Valve MO3-0301-2A
79411 C 6.2 2.0
41
3390 CRD Discharge Valve MO3-0301-2B
79414 C 6.2 2.0
41
3391 CRD Discharge Valve MO2-0301-2A
69411 C 6.2 2.0
41
3392 CRD Discharge Valve MO2-0301-2B Isolation Condenser Makeup Pump 2/3-43122A Isolation Condenser Makeup Pump 2/3-43123A
69412
69906 69907
69908 69909
C
C C
C C
6.2 2.0
2.0 2.0
2.0 2.0
41
43 43
43 43
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
A-120
TABLE A-11
FIRE AREA CRIB HOUSE
Item No.
Equipment
Cable
Discrepancy
Cable Type
Location of
Cable by Zone(s)
Resolution 251 Service Water Pump
2A-3901 20659 20664 24060
P C C
11.3 11.3 11.3
18 18 18
252 Service Water Pump 2B-3901
20766 20769 24060
P C P
11.3 11.3 11.3
18 18 18
230 2 DG Cooling Water Pump 2-3903B
22288 P 11.3 19
3203 2/3 DG Cooling Water Pump 2/3-3903B
22394 32394 77436 67680 67681
P P P P P
11.3 11.3 11.3 11.3 11.3
19 19 19 19 19
3205 Diesel Fire Pump 2/3-4101
23729 23734 23735 23732 23730 23727 23733
C C C P P P P
11.3 11.3 11.3 11.3 11.3 11.3 11.3
40 40 40 40 40 40 40
351 Service Water Pump 3A-3901
30659 30663
P C
11.3 11.3
18 18
352 Service Water Pump
3B-3901 30766 30769
P C
11.3 11.3
18 18
332 3 DG Fuel Oil Transfer Pump 3-5203
23742 23741 23739 23569 23571
C C C C C
11.3 11.3 11.3 11.3 11.3
31 31 31 31 31
330 3 DG Cooling Water Pump 3-39038
32288 P 11.3 19
DRESDEN 2&3 AMENDMENT 13JUNE 2001
B-1
APPENDIX B
B.1 POTENTIAL SPURIOUS COMPONENT OPERATIONS THAT COULD AFFECT SAFE SHUTDOWN - DRESDEN UNITS 2 AND 3
This Appendix lists all valves identified using the methodology in Section 5.0. Where spurious operation could affect safe shutdown systems or cause loss of reactor inventory, the justification for no action or the prefire or postfire action taken is stated. The valves for which a prefire or postfire action was deemed necessary are also listed in Table 5.1-1 of the report.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
B-2
B.2 Notes to Tables B-1 and B-2
Note 1
Valves identified with an * do not appear on the Hot and/or Cold Shutdown Equipment Lists.
Note 2
The following valve operator acronyms apply:
AO - pneumatic operatorMO - electric motor operatorPCV - pressure control valveTCV - temperature control valveSO - solenoid valve
Note 3
The following system acronyms apply:
CS - core sprayCRD - control rod driveDG - diesel generatorDO - diesel oilFP - fire protectionFPC - fuel pool coolingHPCI - high pressure core injectionIC - isolation condensationLPCI - low pressure core injectionMS - main steamRBCW- reactor building cooling waterRF - reactor feedwaterRWCU- reactor water cleanupSC - shutdown coolingSW - service water
Note 4
This failure mode is not a credible event since leakage through the mechanical check valve is required. This event need not be considered.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
B-3
Note 5
Spurious operation of greater than one normally closed valve in a series combination in a branch line is not considered a credible failure mode except for high/low pressure systems. See Note 8.
Note 6
This failure mode impacts cold shutdown only. Manually operated or electrical repairs are permissible. Cold shutdown repairs procedures address potential failures.
Note 7
This air-operated valve involved in this failure mode is a testable air-operated check valve. This valve performs its check valve function no matter what the position of the air operator. Therefore, this failure mode is not credible since it is dependent on the loss of this check valve function.
Note 8
One Dresden 2&3 high-low pressure interface is the reactor coolant system/shutdown cooling system pump suction lines. FSAR Section 10.4 states that the design pressure of the shutdown cooling system is 1,250 psig. The valves, pump casings, and primary sides of the heat exchangers are designed to ASME B&PV Section III, Class C requirements. The piping is designed to ASA B16.5 requirements.
The two 16-inch inboard pump suction containment isolation valves 1001-1A and 1001-1B are normally closed ac motor-operated valves on ESF Division I from 480-Vac reactor building MCC 28-1. The three outboard pumps suction valves 1001-2A, 1001-2B, and 1001-2C are normally closed dc motor-operated valves on ESF Division II from 250-Vdc reactor building MCC-2, Bus A.
Based on the design pressure, failure of the high-low interface is not considered to be a problem.Note 9
An ADS inhibit switch has been added in panel 902-3 (903-3) to prevent spurious blowdown from a fire outside of Fire Area TB-V (Control Room & AEER). See Subsections 6.2.1.8 and 6.2.2.8. For a fire in Fire Area TB-V, spurious blowdown is prevented by removing power to the ADS logic by opening circuit breakers at the 125-Vdc turbine building main bus 2A-1 (3A-1) distribution panel and at the 125-Vdc turbine building reserve bus 2B-1 (3B-1) distribution panel. To prevent spurious operation of any single pressure relief valve for a fire in Fire Areas RB2-I, RB2-II, TB-I, TB-III, TB-V, RB3-I or RB3-II, 125-Vdc power to these valves is removed by either tripping breakers or pulling fuses.
DRESDEN 2&3 AMENDMENT 16JUNE 2003
B-4
Note 10
Modifications have been installed to provide a means to override the effects of spurious signals on these valves. See Subsections 6.2.1.4 and 6.2.2.4.
Note 11
This valve will be manually opened by handwheel operation. A procedure has been implemented. See Section 7.3.
Note 12
LPCI/CCSW Division I is not reviewed in the Associated Circuits Analysis. Therefore, it is not reviewed for fire damage because no credit is taken for this system in regard to safe shutdown capability.
Note 13
LPCI Injection mode is not postulated for safe hot shutdown. Cold shutdown is covered by procedures. Also see Note 6.
Note 14
Closure does not create a condition adverse to safe shutdown. The valve is designed to fail open therefore remaining open also does not create a condition adverse to safe shutdown.
Note 15
Safe shutdown mode is through the heat exchanger.
Note 16
Cables for these valves are independent of all areas for which the HPCI/LPCI method is postulated for shutdown, for the Isolation Condenser Method this valve per the DSSP’s will be verified closed.
Note 17
No power operator shown for this valve.
Note 18Water will go either to the suppression pool or will be confined in CS piping. A flow path to the reactor will be available upon opening of CS valve MO 1402-25B coupled with a decrease in reactor pressure allowing flow through check valve AO 1402-9B. See Note 5.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
B-5
Note 19
A spurious signal will cause only one solenoid (either ac or dc) of a valve to fail to perform its function. As a result, for a given fire, one MSIV on each steamline could fail to close. However, the redundant valve on each steamline would isolate the line (see FPPDP, Volume 6, Section X.7)
Note 20
RWCU drain valves PCV 2(3)-1220, MO 2(3)-1201-11, and MO 2(3)-1201-12 are used to reject water from the primary system during plant startup and shutdown. They are normally closed during plant operation except when the RWCU system is inoperable (UFSAR, p 10.3.2.-1). In each drain line there are two normally closed valves in series. RWCU system relief valve provides protection against high pressure. PCV-1220 is a fail closed valve.
Note 21
Should MO 2(3)-0302-8 or both AO 2(3)-0302-6A and AO 2(3)-0302-6B close, makeup water from the CRD pump via CRD cooling line to the RPV could be disrupted. The AO valves close on loss of air (i.e., loss of normal power). Makeup water is still available to the RPV from the CRD pumps via the charging water line and scram inlet valves CV 2(3)-0305-126 (typical of 177). These valves open for scram and fail open on loss of power or instrument air. Instructions are included in shutdown procedures to ensure that AO 0302-6A or AO 0302-6B and MO 0302-8 are open or another RPV makeup water source is available before resetting the scram system.
Note 22
Spurious operations of AO 2(3)-1904-5-7 and AO 2(3)-1904-5-14 is possible at panels 2252-39 (Unit 2 valves) and 2253-39 (Unit 3), solenoid junction box and cables (24454, 24472, 34454, 34472). This equipment is all located in the reactor building, elevation 589-feet 0-inches, Fire Zones 1.1.2.5A (Unit 2). No credit is taken for the isolation condenser method at shutdown in these fire zones.
Note 23
The scram discharge volume vent and drains are air-operated fail-closed valves. They close on the same signal that opens the scram valves. The backup scram valves also cause these valves to close. There are two valves in series in each vent and drain line. The scram system is a highly reliable system. Certain DSSPs also contain actions to bleed off instrument air to the reactor building.
Note 24
If the RWCU system does not automatically isolate, normally open valve 1201-2 will be closed and normally closed valve 1201-3 will be verified closed or manually closed or, in
DRESDEN 2&3 AMENDMENT 22JUNE 2019
B-6
the event of a fire in Fire Areas RB2-II and RB3-II, air will be removed to valve 2(3)-1217 to ensure RWCU isolation.
Note 25
Valves AO (3)-1301-17 and AO (3)-1301-20 fail in the closed position. If they do not close, manual valve 2(3)-1301-16 can be closed.
Note 26
The piping classification changes from S&L Class B (high pressure) to S&L Class L (low pressure) at MO2 (3)-220-4. The low pressure piping consists of 2" and 2-1/2" piping routed to the condenser. Near the condenser, the 2-1/2" piping discharges into an 18" line which then drains to the condenser. Based on maximum steam conditions of 1250 psig at 575ºF and S&L Standard MES-2.5, pressure-temperature ratings for piping, the 2" (Schedule 80) and 2-1/2" (Schedule 40) piping specified per PDT "L" can withstand the above steam conditions. The 18" (standard weight) line cannot withstand the above conditions. However, the pressure of the fluid as it discharges from the 2-1/2" line into the 18" line decreases to an acceptable level.
Note 27
This motor operated valve was replaced with a manually operated valve per EC 404969.Thus, no spurious Appendix R concerns exist.
Note 28
If the HPCI pump is not delivering water to the reactor, verify closed MO2(3)-2301-5 or trip the HPCI turbine.
Note 29
CRD pump discharge valves MO-0301-2A and 2B could spuriously position to an undesired condition. Manual valve operational capability should be available.
Note 30
DSSP’s provide actions to assure these valves are closed.
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-7
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*AO
-2-2
03-1
Aan
d*A
O-2
-203
-2A
MS
M12
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-2-2
03-1
Ban
d *A
O-2
-203
-2B
MS
M12
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-2-2
03-1
Can
d*A
O-2
-203
-2C
MS
M12
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-2-2
03-1
Dan
d*A
O-2
-203
-2D
MS
M12
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*MO
-2-2
20-1
and
*MO
-2-2
20-2
MS
M12
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
drai
ns a
nd re
stric
tive
orifi
ces R
D-2
-220
-91A
, B,
C, a
nd D
to m
ain
stea
mlin
e an
d th
roug
h R
O-2
-220
-75
to
cond
ense
r.
Not
e 5
*MO
-2-2
20-1
,*M
O-2
-220
-2an
d*M
O-2
-220
-3
MS
M12
Spur
ious
ope
ning
of t
hese
thre
e va
lves
com
bina
tions
re
sult
in lo
ss o
f rea
ctor
coo
lant
thro
ugh
drai
ns to
mai
n st
eam
line.
Not
e 5
DR
ESD
EN 2
&3
AM
END
MEN
T 20
JUN
E 20
15
B-8
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
n*M
O-2
-220
-1,
*MO
-2-2
20-2
and
*MO
-2-2
20-4
MS
M12
Spur
ious
ope
ning
of t
hese
thre
e va
lves
resu
lt in
loss
of
reac
tor c
oola
nt th
roug
h dr
ains
to m
ain
cond
ense
r.N
otes
5 &
26
Targ
et R
ock
Val
ve
2-20
3-3A
orEl
ectro
mat
ic R
elie
f V
alve
s2-
203-
3Bor
2-20
3-3C
or2-
203-
3Dor
2-20
3-3E
MS
M-1
2(S
ht. 1
)Sp
urio
us o
peni
ng w
ill v
ent R
PV in
vent
ory
tosu
ppre
ssio
n po
ol.
Not
e 9
Che
ck v
alve
s and
is
olat
ion
valv
es su
ch a
s*M
O-2
-320
5A*M
O-2
-320
5B
RF
M-1
4Fo
r ope
ning
of i
sola
tion
valv
es, l
eaka
ge th
roug
h ch
eck
valv
es is
lost
to c
onde
nser
Not
e 4
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-9
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
2-12
01-1
and
MO
2-12
01-2
orM
O2-
1201
-1A
and
MO
2-12
01-2
orM
O2-
1201
-1an
dM
O2-
1201
-3an
dM
O2-
1201
-4or
MO
2-12
01-1
Aan
dM
O2-
1201
-3an
dM
O2-
1201
-4
RW
CU
M-3
0Fa
ilure
in o
pen
posi
tion
may
cau
se p
ress
ure
to b
uild
up
in lo
w p
ress
ure
pipi
ng d
owns
tream
of P
CV
-2-1
217
(with
RO
) and
flui
d lo
ss to
con
dens
er a
nd/o
req
uipm
ent d
rain
s via
the
relie
f val
ves.
Not
e 24
PCV
-2-1
217
*PC
V2-
1220
and
*MO
-2-1
201-
11
RW
CU
M-3
0O
peni
ng w
ould
ven
t to
cond
ense
r.N
otes
20,
24
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-1
0
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
n
*PC
V-2
-122
0an
d*M
O-2
-120
1-12
RW
CU
M-3
0O
peni
ng w
ould
ven
t to
was
te ta
nk.
Not
es20
, 24
*AO
-2-1
402-
9Aan
d*M
O-2
-140
2-25
A
CS
M-2
7Sp
urio
us o
peni
ng o
f bot
h va
lves
will
subj
ect t
he c
lass
300
co
re sp
ray
pipi
ng to
and
from
the
asso
ciat
ed c
ore
spra
y pu
mp
to R
PV p
ress
ure.
Ele
vate
d pr
essu
res c
ould
resu
lt in
th
e re
lief v
alve
s ope
ning
to th
e R
B e
quip
men
t dra
in ta
nks.
Not
e 7
*AO
-2-1
402-
9Ban
d*M
O-2
-140
2-25
B
CS
M-2
7Sp
urio
us o
peni
ng o
f bot
h va
lves
will
subj
ect t
he c
lass
300
co
re sp
ray
pipi
ng to
and
from
the
asso
ciat
ed c
ore
spra
y pu
mp
to R
PV p
ress
ure.
Ele
vate
d pr
essu
res c
ould
resu
lt in
the
relie
f val
ves o
peni
ng to
the
RB
equ
ipm
ent d
rain
tank
s.
Not
e 7
MO
-2-1
301-
1 or
MO
-2-1
301-
2
ICM
-28
Spur
ious
clo
sure
will
isol
ate
RPV
from
isol
atio
n co
nden
ser.
Not
e: M
O-2
-130
1-1
is in
dry
wel
l and
in
acce
ssib
le.
Not
es 1
0 &
11
MO
-2-1
301-
3IC
M-2
8Fa
ilure
to o
pen
prev
ents
con
dens
ed st
eam
from
retu
rnin
g fr
om is
olat
ion
cond
ense
r coi
l to
RPV
. Thi
s def
eats
nat
ural
ci
rcul
atio
n pa
th.
Not
e 11
DR
ESD
EN 2
&3
AM
END
MEN
T 22
JUN
E 20
19
B-1
1
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
STH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-1
301-
4IC
M-2
8Sp
urio
us c
losu
re d
efea
ts n
atur
al c
ircul
atio
n pa
th fo
r is
olat
ion
cond
ense
r. N
ote
that
this
val
ve is
loca
ted
in
dryw
ell a
nd is
ther
efor
e in
acce
ssib
le.
Not
e 10
MO
-2-1
301-
10or
MO
-2-4
102
ICM
-28
Spur
ious
clo
sure
isol
ates
mak
eup
to is
olat
ion
cond
ense
r fr
om se
rvic
e w
ater
sys
tem
.N
ote
11
MO
-2-4
399-
74IC
M-3
9Sp
urio
us c
losu
re is
olat
es m
akeu
p to
isol
atio
n co
nden
ser
from
the
clea
n de
min
eral
ized
wat
er st
orag
e ta
nk.
Not
e 11
AO
2-13
01-1
7A
O2-
1301
-20
ICM
-28
Spur
ious
failu
re in
ope
n po
sitio
n w
ould
allo
w lo
ss o
f re
acto
r inv
ento
ry.
Not
e 25
Val
ve-3
906
FPM
-23
Spur
ious
clo
sure
isol
ates
serv
ice
wat
er fr
om is
olat
ion
cond
ense
r. D
efea
ts m
akeu
p.N
ote
27
MO
-2-3
901
and
*MO
-2-3
902
SWM
-22
Spur
ious
ope
ning
div
erts
serv
ice
wat
er to
mai
n co
nden
ser
hotw
ell.
Red
uces
isol
atio
n co
nden
ser m
akeu
p ca
paci
ty o
r sh
utdo
wn
cool
ing
heat
rem
oval
.
Not
e 5
*TC
V-2
-390
1SW
M-2
2Fa
ils o
pen.
Div
erts
serv
ice
wat
er fr
om is
olat
ion
cond
ense
r m
akeu
p or
shut
dow
n co
olin
g he
at re
mov
al.
Not
e 14
*MO
-2-0
302-
8or
*AO
-2-0
302-
6A a
ndA
O-2
-030
2-6B
CR
DM
-34
Spur
ious
clo
sure
pre
vent
s RPV
mak
eup
from
coo
ling
wat
er li
ne d
urin
g sh
utdo
wn
with
isol
atio
n co
nden
ser.
Not
e 21
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-1
2
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-1
001-
1Aan
dM
O-2
-100
1-1B
SCM
-32
Spur
ious
clo
sure
isol
ates
shut
dow
n co
olin
g sy
stem
from
R
PV.
Not
es 6
& 8
MO
-2-1
001-
2A,
MO
-2-1
001-
2Ban
dM
O-2
-100
1-2C
SCM
-32
Spur
ious
clo
sure
isol
ates
shut
dow
n co
olin
g sy
stem
from
R
PVN
otes
6 &
8
MO
-2-1
001-
4A,
MO
-2-1
001-
4Ban
dM
O-2
-100
1-4C
SCM
-32
Spur
ious
clo
sure
isol
ates
shut
dow
n co
olin
g sy
stem
from
R
PV.
Not
e 6
MO
-2-1
001-
5A,
and
MO
-2-1
001-
5B
SCM
-32
Spur
ious
clo
sure
isol
ates
shut
dow
n co
olin
g sy
stem
from
R
PV.
Not
e 6
*AO
-2-1
501-
25A
and
*AO
-2-1
501-
25B
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
isol
ates
shut
dow
n co
olin
g sy
stem
from
R
PV. N
ote
that
thes
e va
lves
are
inac
cess
ible
in th
at th
ey
are
in th
e dr
ywel
l.
Not
e 7
MO
-2-1
501-
22A
,M
O-2
-150
1-38
Aan
dM
O-2
-150
1-20
A(N
ote
1)
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
omR
PV to
wet
wel
l.N
ote
6
DR
ESD
EN 2
&3
AM
END
MEN
T 20
JUN
E 20
15
B-1
3
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-1
501-
22A
,M
O-2
-150
1-21
A,
MO
-2-1
501-
18A
and
MO
-2-1
501-
19A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
om
RPV
to to
rus s
pray
hea
der.
Not
e6
MO
-2-1
501-
22A
,M
O-2
-150
1-21
A,
MO
-2-1
501-
27A
and
MO
-2-1
501-
28A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g fr
om R
PV to
dr
ywel
l spr
ay h
eade
r.N
otes
5 &
6
HM
O-2
-020
2-4A
(N.O
.) an
dM
O-2
-020
2-5A
(N.O
.)
Rx
Rec
irc.
M-2
6(S
ht. 2
)Sp
urio
us o
peni
ng p
rovi
des a
flow
pat
h fo
r shu
tdow
n co
olin
g w
hich
byp
asse
s RPV
and
def
eats
sys
tem
. Not
e th
at th
ese
valv
es a
re in
the
dryw
ell a
nd a
re in
acce
ssib
le.
Not
es 5
& 6
MO
-2-3
701
RB
CC
WM
-20
Spur
ious
clo
sure
blo
cks t
he c
oolin
g w
ater
for t
he
shut
dow
n co
olin
g pu
mps
.N
ote
6
MO
-2-3
704
RB
CC
WM
-20
Spur
ious
clo
sure
blo
cks c
oolin
g w
ater
to th
e sh
utdo
wn
cool
ing
heat
exc
hang
er.
Not
e 6
TCV
-2-3
904A
,TC
V-2
-390
4Ban
dTC
V-2
-390
4C
SWM
-22
Spur
ious
clo
sure
blo
cks s
ervi
ce w
ater
flow
to th
e R
BC
CW
S he
at e
xcha
nger
s whi
ch re
mov
e de
cay
heat
via
th
e sh
utdo
wn
cool
ing
syst
em.
Not
e 6
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-1
4
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*2-5
772-
101
(isol
atio
n da
mpe
r)2/
3-57
72-1
01
DG
Ven
tilat
ion
M-9
74M
-273
Spur
ious
clo
sure
of e
xhau
st is
olat
ion
dam
per w
ill c
ause
he
at lo
ad to
be
trapp
ed in
die
sel g
ener
ator
room
. Hig
h te
mpe
ratu
res m
ay p
reve
nt 7
2 ho
urs o
f ope
ratio
n.
Not
e 16
*SO
-3-5
201
3 D
O
Tran
sfer
M-4
1(S
ht. 2
)Sp
urio
us fa
ilure
to c
lose
whi
le fi
lling
day
tank
(3-5
202)
w
ould
ove
rflo
w d
iese
l oil
to d
rain
s. Th
is w
ould
redu
ce
fuel
oil
supp
ly fo
r em
erge
ncy
pow
er fr
om U
nit 3
die
sel.
Not
e 16
MO
-2-2
301-
6H
PCI
M-5
1Sp
urio
us c
losu
re w
ill is
olat
e th
e H
PCI p
umps
from
co
nden
sate
stor
age
tank
2/3
8-33
03.
Not
e 16
MO
-2-2
301-
9H
PCI
M-5
1Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
will
isol
ate
the
HPC
I inj
ectio
n flo
w fr
om th
e R
PV.
Not
e 16
MO
-2-2
301-
8H
PCI
M-5
1Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
will
isol
ate
the
flow
pat
h fo
r HPC
I inj
ectio
n in
to R
PV.
Not
e 16
*AO
-2-2
301-
7H
PCI
M-5
1Sp
urio
us o
peni
ng c
ould
resu
lt in
loss
of
reac
tor c
oola
nt.
Not
e 7
MO
-2-2
301-
35an
dM
O-2
-230
1-36
HPC
IM
-51
Spur
ious
ope
ning
of t
hese
val
ves w
ill d
iver
tH
PCI p
ump
suct
ion
from
the
CST
to th
esu
ppre
ssio
n po
ol.
Not
e 4
MO
-2-2
301-
14
SO-2
-330
1 SO
-2-3
302
HPC
I
Con
dens
ate
M-5
1
M-5
1
Spur
ious
ope
ning
of v
alve
div
erts
HPC
I flo
wto
wet
wel
l thu
s red
ucin
g H
PCI i
njec
tion
flow
into
RPV
, als
o pr
ovid
es a
pat
h fo
r CST
dra
in d
own.
Spur
ious
ope
ratio
n of
thes
e va
lves
cou
ld c
ause
CST
dra
in
dow
n.
Not
e 16
Not
e 30
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-1
5
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-2
-230
1-10
And
MO
-2-2
301-
15
HPC
IM
-51
Spur
ious
open
ing
of th
ese
valv
es w
ould
div
ert H
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
CST
2/3
B-3
303.
Not
e 5
*PC
V-2
-230
1-46
HPC
IM
-51
Spur
ious
clo
sure
will
isol
ate
the
HPC
I tur
bine
gla
nd se
al
cond
ense
r and
lube
oil
cool
er c
oola
nt fl
ow fr
om H
PCI
pum
p di
scha
rge.
Not
e 17
*MO
-2-2
301-
48H
PCI
M-5
1Sp
urio
us c
losu
re w
ill is
olat
e th
e H
PCI t
urbi
ne g
land
seal
co
nden
ser a
nd lu
be o
il co
oler
coo
lant
flow
.N
ote
11
MO
-2-2
301-
3H
PCI
M-5
1Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
will
isol
ate
the
HPC
I tur
bine
from
the
RPV
stea
m su
pply
.N
ote
16
Spur
ious
ope
ning
of t
his v
alve
wou
ld re
sult
in lo
ss o
f re
acto
r inv
ento
ry to
the
supp
ress
ion
pool
.N
ote
28
MO
-2-2
301-
4or
MO
-2-2
301-
5
HPC
IM
-51
Failu
re o
f the
se v
alve
s in
the
clos
ed p
ositi
on w
ill is
olat
e th
e H
PCIt
urbi
ne fr
om th
e R
PV st
eam
supp
ly. N
ote:
M
O-2
-230
1-5
is lo
cate
d in
the
dryw
ell a
nd is
in
acce
ssib
le.
Not
e 16
MO
-2-1
501-
5ALP
CI
M-2
9(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 2A
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol re
duci
ng th
e po
ol
cool
ing
flow
.
Not
e 12
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-1
6
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-2
-150
1-5B
LPC
IM
-29
(Sht
. 1)
Spur
ious
val
ve c
losu
re w
ill is
olat
e LP
CI p
ump
2B-1
502
suct
ion
from
the
supp
ress
ion
pool
redu
cing
the
pool
co
olin
g flo
w.
Not
e 12
MO
-2-1
501-
20A
,M
O-2
-150
1-38
Aan
dM
O-2
-150
1-21
A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus s
pray
hea
der t
o th
e to
rus f
ull f
low
test
line
.
Not
e 5
MO
-2-1
501-
22A
,*A
O-2
-150
1-25
Aan
dM
O-2
-150
1-21
A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
cou
ld re
sult
in lo
ss o
f rea
ctor
inve
ntor
yN
ote
7
MO
-2-1
501-
27A
and
MO
-2-1
501-
28A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e w
etw
ellt
o th
e dr
ywel
l spr
ay
ring
head
er th
us re
duci
ng p
ool c
oolin
g flo
w.
Not
e 5
MO
-2-1
501-
22A
,M
O-2
-150
1-38
Aan
dM
O-2
-150
1-20
A
SC &
LPC
IM
-32
M-2
9(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
lthr
ough
the
toru
s ful
l flo
w te
st li
ne.
Not
e 5
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-1
7
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-1
501-
22A
,M
O-2
-150
1-21
A,
MO
-2-1
501-
18A
and
MO
-2-1
501-
19A
SC &
LPC
IM
-32
M-2
9(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s spr
ay
head
er.
Not
e 6
MO
-2-1
501-
32B
and
MO
-2-1
501-
32A
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
A"
pum
p fr
om L
PCI "
B"
wet
wel
l inj
ectio
n th
us e
limin
atin
g a
poss
ible
wet
wel
l inj
ectio
n pa
th.
Not
e 6
MO
-2-1
501-
11A
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
ers 2
A-1
503.
Not
e 6
*MO
-2-1
402-
4AC
SM
-27
Spur
ious
ope
ning
of t
his v
alve
wou
ld d
iver
t LPC
I poo
l co
olan
t flo
w to
the
core
spra
y/R
PV in
ject
ion
pipi
ng
ther
efor
e re
duci
ng th
e LP
CI r
etur
n flo
w to
the
supp
ress
ion
pool
.
Not
e 12
MO
-2-1
501-
13A
LPC
IM
-29
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
will
dire
ct L
PCI
pum
p di
scha
rge
to w
etw
ellt
here
fore
byp
assi
ng h
eat
exch
ange
r 2A
-150
3. T
his f
ailu
re w
ill re
sult
in a
redu
ctio
n in
the
LPC
I hea
t rem
oval
cap
abili
ty.
Not
e 6
MO
-2-1
501-
3ASW
M-2
9(S
ht. 1
)Fa
ilure
of t
his v
alve
to o
pen
wou
ld is
olat
e se
rvic
e w
ater
flo
w fr
om th
e co
ntai
nmen
t coo
ling
heat
exc
hang
er. T
his
failu
re w
ould
def
eat t
he h
eat r
emov
al c
apab
ility
to th
e LP
CI p
ool c
oolin
g sy
stem
.
Not
e 6
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-1
8
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-2
-150
1-5C
LPC
IM
-29
(Sht
. 1)
Spur
ious
val
ve c
losu
re w
ill is
olat
e LP
CI p
ump
2C-1
502
suct
ion
from
the
supp
ress
ion
pool
.N
ote
16
MO
-2-1
501-
5DLP
CI
M-2
9(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 2D
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol.
Not
e 16
MO
-2-1
501-
18B
and
MO
-2-1
501-
19B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus f
ull f
low
test
line
to th
e to
rus s
pray
hea
der.
Not
e 5
MO
-2-1
501-
38B
,M
O-2
-150
1-20
Ban
dM
O-2
-150
1-21
B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus s
pray
hea
der t
o th
e to
rus f
ull f
low
test
line
.
Not
e 5
MO
-2-1
501-
21B
,M
O-2
-150
1-22
Ban
d*A
O-2
-150
1-25
B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
cou
ld re
sult
in lo
ss o
f rea
ctor
inve
ntor
y.N
ote
7
MO
-2-1
501-
27B
and
MO
-2-1
501-
28B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om w
etw
ell t
o th
e dr
ywel
l spr
ay ri
ng
head
er.
Not
e 5
MO
-2-1
501-
22B
,M
O-2
-150
1-38
Ban
dM
O-2
-150
1-20
B
SC &
LPC
IM
-32
M-2
9(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s ful
l flo
w te
st li
ne.
Not
e 6
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-1
9
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-2
-150
1-22
B,
MO
-2-1
501-
21B
,M
O-2
-150
1-18
Ban
dM
O-2
-150
1-19
B
SC &
LPC
IM
-32
M-2
9(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s spr
ay
head
er.
Not
e 6
MO
-2-1
501-
32B
and
MO
-2-1
501-
32A
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
A"
wet
wel
l inj
ectio
n.N
ote
6
MO
-2-1
501-
11B
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 2
-B-1
503.
Not
e 15
*MO
-2-1
402-
4BC
SM
-27
Spur
ious
ope
ning
of t
his v
alve
wou
ld d
iver
t LPC
I poo
l co
olan
t flo
w to
the
core
spra
y/R
PV in
ject
ion
pipi
ng
ther
efor
e re
duci
ng th
e LP
CI r
etur
n flo
w to
the
supp
ress
ion
pool
.
Not
e 18
MO
-2-1
501-
13B
LPC
IM
-29
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
will
dire
ct L
PCI
pum
p di
scha
rge
to th
e w
etw
ell t
here
fore
byp
assi
ng h
eat
exch
ange
r 2B
-150
3. T
his f
ailu
re w
ill re
sult
in a
redu
ctio
n in
the
LPC
I hea
t rem
oval
cap
abili
ty.
Not
e 16
MO
-2-1
501-
3BSW
M-2
9(S
ht. 1
)Fa
ilure
of t
his v
alve
to o
pen
wou
ld is
olat
e th
e se
rvic
e w
ater
retu
rn fr
om th
e co
ntai
nmen
t coo
ling
heat
ex
chan
ger.
This
failu
re w
ould
com
plet
ely
defe
at th
e he
at
rem
oval
cap
abili
ty o
f the
LPC
I sys
tem
.
Not
e 16
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
0
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-2
-150
1-5A
LPC
IM
-29
(Sht
. 1)
Spur
ious
val
ve c
losu
re w
ill is
olat
e LP
CI p
ump
2A-1
502
suct
ion
from
the
supp
ress
ion
pool
ther
efor
e re
duci
ng R
PV
inje
ctio
n flo
w.
Not
e 12
MO
-2-1
501-
5BLP
CI
M-2
9(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 2B
-150
2 su
ctio
n fo
r the
supp
ress
ion
pool
ther
efor
e re
duci
ng R
PV
inje
ctio
n flo
w.
Not
e 12
MO
-2-1
501-
18A
,M
O-2
-150
1-19
A,
MO
-2-1
501-
20A
,M
O-2
-150
1-21
Aan
dM
O-2
-150
1-38
A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
wet
wel
l the
refo
re
redu
cing
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-2-1
501-
27A
and
MO
-2-1
501-
28A
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
dryw
ell s
pray
ring
he
ader
ther
efor
e re
duci
ng R
PV in
ject
ion
flow
.
Not
e 5
MO
-2-1
501-
11A
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 2
A-1
503.
Not
e 12
MO
-2-1
501-
32A
and
MO
-2-1
501-
32B
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
A"
from
LPC
I "B
" R
PV in
ject
ion
pipi
ng th
us e
limin
atin
g a
poss
ible
RPV
inje
ctio
n pa
th.
Not
e 13
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
1
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*MO
-2-1
402-
4AM
O-2
-150
1-20
Aan
d M
O-2
-150
1-38
A
CS
& L
PCI
M-2
7M
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
he v
alve
wou
ld d
iver
t LPC
I RPV
in
ject
ion
flow
to th
e co
re sp
ray
pipi
ng th
us re
duci
ng th
e in
ject
ion
to th
e R
PV.
Not
e 5
MO
-2-1
501-
13A
LPC
IM
-29
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
will
div
ert L
PCI
pum
p di
scha
rge
from
RPV
to th
e w
etw
ell t
here
fore
by
pass
ing
heat
exc
hang
er 2
A-1
503.
Thi
s fai
lure
will
re
sult
in a
redu
ctio
n in
the
RPV
inje
ctio
n flo
w.
Not
e 13
MO
-2-1
501-
3ASW
M-2
9(S
ht. 1
)Fa
ilure
of t
his v
alve
to o
pen
will
isol
ate
the
shut
dow
n se
rvic
e w
ater
from
the
cont
ainm
ent c
oolin
g he
at
exch
ange
r. Th
is fa
ilure
wou
ld d
efea
t the
hea
t rem
oval
ca
pabi
lity
of th
e LP
CI s
yste
m.
Not
e 12
MO
-2-1
501-
5CLP
CI
M-2
9(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 2C
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
RPV
in
ject
ion
flow
.
Not
e 13
MO
-2-1
501-
5DLP
CI
M-2
9(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 2D
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
RPV
in
ject
ion
flow
.
Not
e 13
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
2
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
n
MO
-2-1
501-
18B
,M
O-2
-150
1-19
B,
MO
-2-1
501-
20B
,M
O-2
-150
1-21
Ban
dM
O-2
-150
1-38
B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
wet
wel
l the
refo
re
redu
cing
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-2-1
501-
27B
and
MO
-2-1
501-
28B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
dry
wel
l spr
ay ri
ng h
eade
r th
eref
ore
redu
cing
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-2-1
501-
11B
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 2
B-1
503.
Not
e 15
*MO
-2-1
402-
4B,
MO
-2-1
501-
20B
and
MO
-2-1
501-
38B
CS
& L
PCI
M-2
7M
-29
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI R
PV
inje
ctio
n flo
w to
the
core
spra
y pi
ping
ther
efor
e re
duci
ng
the
inje
ctio
n flo
w to
the
RPV
.
Not
e 5
MO
-2-1
501-
32A
and
MO
-2-1
501-
32B
LPC
IM
-29
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
B"
pum
ps fr
om L
PCI "
A"
RPV
inje
ctio
n pi
ping
thus
el
imin
atin
g a
poss
ible
RPV
inje
ctio
n pa
th.
MO
-2-1
501-
13B
LPC
IM
-29
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
will
div
ert L
PCI
pum
p di
scha
rge
from
RPV
to w
etw
ellt
here
fore
byp
assi
ng
heat
exc
hang
er 2
B-1
503.
Thi
s fai
lure
will
resu
lt in
a
redu
ctio
n in
the
RPV
inje
ctio
n flo
w.
Not
e 16
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-2
3
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-1
501-
3BSW
M-2
9(S
ht. 1
)Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
will
isol
ate
the
serv
ice
wat
er fl
ow fr
om th
e co
ntai
nmen
t coo
ling
heat
ex
chan
ger.
This
will
def
eat t
he h
eat r
emov
al c
apab
ilitie
s of
the
LPC
I sys
tem
.
Not
e 16
SO-2
-220
-47
and
SO-2
-220
-46
Hea
d V
ent
M-2
6(S
ht. 1
)Sp
urio
us o
peni
ng o
f hea
d ve
nt v
alve
s cou
ld re
sult
in lo
ss
of in
vent
ory.
Not
e 5
MO
-2-1
501-
22B
,M
O-2
-150
1-38
Ban
dM
O-2
-150
1-20
B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
omR
PV to
wet
wel
l.N
ote
6
MO
-2-1
501-
22B
,M
O-2
-150
1-21
B,
MO
-2-1
501-
18B
and
MO
-2-1
501-
19B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g fr
om R
PV to
to
rus s
pray
hea
der.
Not
es 6
MO
-2-1
501-
22B
,M
O-2
-150
1-21
B,
MO
-2-1
501-
27B
,an
dM
O-2
-150
1-28
B
LPC
IM
-29
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g fr
om R
PV to
dr
ywel
l spr
ay h
eade
r.N
ote
13
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-2
4
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
AO
-3-1
904-
5-7
FPC
M-5
0Sp
urio
us o
peni
ng o
f the
val
ve c
ould
div
ert p
art o
f the
is
olat
ion
cond
ense
r mak
eup
wat
er to
the
fuel
poo
l coo
ling
and
clea
nup
pipi
ng.
Not
e 22
AO
-3-1
905-
5-14
FPC
M-5
0Sp
urio
us o
peni
ng o
f the
val
ve c
ould
div
ert p
art o
f the
is
olat
ion
cond
ense
r mak
eup
wat
er to
the
fuel
poo
l coo
ling
and
clea
nup
pipi
ng.
Not
e 22
TCV
-3-3
901
SWM
-22
Spur
ious
ope
ning
div
erts
isol
atio
n co
nden
ser m
akeu
p or
sh
utdo
wn
cool
ing
heat
rem
oval
wat
er to
the
circ
ulat
ing
wat
er d
isch
arge
hea
der.
Not
e 14
MO
-3-3
901
and
MO
-3-3
902
SWM
-355
Spur
ious
ope
ratio
n of
thes
e va
lves
cou
ld d
iver
t Uni
t 2
serv
ice
wat
er to
the
Uni
t 3 c
onde
nser
.N
ote
5
MO
-2-1
904-
5-7
FPC
M-5
0Sp
urio
us o
peni
ng o
f the
val
ve c
ould
div
ert p
art o
f the
is
olat
ion
cond
ense
r mak
eup
wat
er to
the
fuel
poo
l coo
ling
and
clea
nup
pipi
ng. (
This
ass
umes
that
che
ck v
alve
2-
1999
-101
is d
raw
n ba
ckw
ards
on
the
P&ID
.)
Not
e 22
MO
-2-1
904-
5-14
FPC
M-5
0Sp
urio
us o
peni
ng o
f the
val
ve c
ould
div
ert p
art o
f the
is
olat
ion
cond
ense
r mak
eup
wat
er to
the
fuel
poo
l coo
ling
and
clea
nup
pipi
ng. (
This
ass
umes
that
che
ck v
alve
2-
1999
-101
is d
raw
n ba
ckw
ards
on
the
P&ID
.)
Not
e 22
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
5
TAB
LE B
-1
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
2Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
AO
-2-0
302-
158A
(B)
AO
-2-0
302-
157A
(B)
AO
-2-0
302-
160A
(B)
AO
-2-0
302-
161A
(B)
CR
DM
-34
Sim
ulta
neou
s ope
ning
of t
he tw
o va
lves
in a
scra
m
disc
harg
e vo
lum
e dr
ain
or v
ent l
ine
coul
d re
sult
in lo
ss o
f re
acto
r inv
ento
ry.
Not
e 23
MO
2-03
01-2
A(B
)C
RD
M-3
4Sp
urio
us c
losu
re o
f the
se v
alve
s cou
ld re
sult
in lo
ss o
f R
PV m
ake-
up c
apab
ility
.N
ote
29
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
6
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*AO
-3-2
03-1
Aan
d*A
O-3
-203
-2A
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-3-2
03-1
Ban
d*A
O-3
-203
-2B
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-3-2
03-1
Can
d*A
O-3
-203
-2C
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*AO
-3-2
03-1
Dan
d*A
O-3
-203
-2D
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
mai
n st
eam
line.
Not
e 19
*MO
-3-2
20-1
and
*MO
-3-2
20-2
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
will
resu
lt in
loss
of r
eact
or c
oola
nt
thro
ugh
drai
ns a
nd re
stric
tive
orifi
ces R
O-3
-220
-91A
, B,
C a
nd D
to m
ain
stea
mlin
e an
d th
roug
h R
O-3
-220
-95
to
cond
ense
r.
Not
e 20
*MO
-3-2
20-1
,*M
O-3
-220
-2an
d*M
O-3
-220
-3
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
of t
hese
four
val
ves c
ombi
natio
n re
sults
in lo
ss o
f rea
ctor
coo
lant
thro
ugh
drai
ns to
mai
n st
eam
line.
Not
e 5
DR
ESD
EN 2
&3
AM
END
MEN
T 20
JUN
E 20
15
B-2
7
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*MO
-3-2
20-1
,*M
O-3
-220
-2an
d*M
O-3
-220
-4
MS
M-3
45(S
hts.
1&2)
Spur
ious
ope
ning
of t
hese
thre
e va
lves
resu
lts in
loss
of
reac
tor c
oola
nt th
roug
h dr
ains
to m
ain
cond
ense
r.N
otes
5 &
26
Targ
et R
ock
Val
ve
3-20
3-3A
orEl
ectro
mat
ic R
elie
f V
alve
s3-
203-
3B o
r3-
203-
3C o
r3-
203-
3D o
r3-
203-
3E
MS
M-3
45(S
ht. 1
)Sp
urio
us o
peni
ng w
ill v
ent R
PV in
vent
ory
to
supp
ress
ion
pool
.N
ote
9
Che
ck V
alve
s & (M
O
and/
or A
O) I
sola
tion
Val
ves s
uch
as*M
O-3
-320
5A
and
*MO
-3-3
205B
RF
M-3
47Fo
r ope
ning
of i
sola
tion
valv
es, l
eaka
ge th
roug
h ch
eck
valv
es is
lost
to c
onde
nser
.N
ote
4
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
8
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*AO
-3-1
402-
9Aan
d*A
O-3
-140
2-25
A
CS
M-3
58Sp
urio
us o
peni
ng o
f bot
h va
lves
will
subj
ect t
he c
lass
30
0 co
re sp
ray
pipi
ng to
and
from
the
asso
ciat
ed c
ore
spra
y pu
mp
to th
e R
PV p
ress
ure.
Ele
vate
d pr
essu
res
coul
d re
sult
in th
e re
lief v
alve
s ope
ning
to th
e R
B
equi
pmen
t dra
in ta
nks.
Not
e 7
*AO
-3-1
402-
9Ban
d*M
O-3
-140
2-25
B
CS
M-3
58Sp
urio
us o
peni
ng o
f bot
h va
lves
will
subj
ect t
he c
lass
30
0 co
re sp
ray
pipi
ng to
and
from
the
asso
ciat
ed c
ore
spra
y pu
mp
to th
e R
PV p
ress
ure.
Ele
vate
d pr
essu
res
coul
d re
sult
in th
e re
lief v
alve
s ope
ning
to th
e R
B
equi
pmen
t dra
in ta
nks.
Not
e 7
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-2
9
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
201-
1an
dM
O-3
-120
1-2
orM
O-3
-120
1-1A
and
MO
-3-1
201-
2or
MO
-3-1
201-
1an
dM
O-3
-120
1-3
and
MO
-3-1
201-
4or
MO
-3-1
201-
1Aan
dM
O-3
-120
1-3
and
MO
-3-1
201-
4PC
V-3
-121
7
RW
CU
M-3
61Fa
ilure
in th
e op
en p
ositi
on m
ay c
ause
sys
tem
pre
ssur
e to
bui
ld in
low
pre
ssur
e pi
ping
dow
nstre
am o
f PC
V-3
-12
17 a
nd fl
uid
inve
ntor
y m
ay b
e lo
st to
the
cond
ense
r an
d/or
the
RB
equ
ipm
ent d
rain
s via
the
relie
f val
ves.
Not
e 24
*PC
V-3
-122
0an
d*M
O-3
-120
1-11
RW
CU
M-3
61O
peni
ng w
ill v
ent s
yste
m in
vent
ory
to c
onde
nser
or
was
te ta
nk.
Not
e 20
DR
ESD
EN 2
&3
AM
END
MEN
T 22
JUN
E 20
19
B-3
0
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*PC
V-3
-122
0an
d*M
O-3
-120
1-12
RW
CU
M-3
61O
peni
ng w
ould
ven
t to
cond
ense
r or w
aste
tank
.N
ote
20
MO
-3-1
301-
1or
MO
-3-1
301-
2
ICM
-359
Spur
ious
clo
sure
will
isol
ate
RPV
from
isol
atio
n co
nden
ser.
Not
e: M
O-3
-130
1-1
is in
the
dryw
ell a
nd is
in
acce
ssib
le.
Not
es 1
0 &
11
MO
-3-1
301-
3IC
M-3
59Fa
ilure
to o
pen
prev
ents
the
cond
ense
d st
eam
from
re
turn
ing
from
the
isol
atio
n co
nden
ser c
oil t
o th
e R
PV.
This
def
eats
the
natu
ral c
ircul
atio
n pa
th.
Not
e 11
MO
-3-1
301-
4IC
M-3
59Sp
urio
us c
losu
re d
efea
ts th
e na
tura
l circ
ulat
ion
path
for
the
isol
atio
n co
nden
ser.
Not
e: T
his v
alve
is lo
cate
d in
the
dryw
ell a
nd is
ther
efor
e in
acce
ssib
le.
Not
e 10
MO
-3-1
301-
10or
MO
-3-4
102
ICM
-359
Spur
ious
clo
sure
isol
ates
mak
eup
to is
olat
ion
cond
ense
r fr
om th
e se
rvic
e w
ater
sys
tem
.N
ote
11
MO
-3-4
399-
74IC
M-3
69Sp
urio
us c
losu
re is
olat
es c
onde
nser
mak
eup
from
the
clea
n de
min
eral
ized
wat
er st
orag
e ta
nk.
Not
e 11
AO
-3-1
301-
17A
O-3
-130
1-20
ICM
-359
Spur
ious
failu
re in
the
open
pos
ition
wou
ld a
llow
reac
tor
loss
of r
eact
or in
vent
ory.
Not
e 25
Val
ve-3
906
FPM
-23
Spur
ious
clo
sure
isol
ates
serv
ice
wat
er fr
om is
olat
ion
cond
ense
r. D
efea
ts m
akeu
p.N
ote
27
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-3
1
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-2-3
901
and
*MO
-2-3
902
SWM
-22
Spur
ious
ope
ning
div
erts
serv
ice
wat
er fl
ow to
mai
n co
nden
ser h
otw
ell w
hich
redu
ces i
sola
tion
cond
ense
r m
akeu
p ca
paci
ty o
r the
shut
dow
n co
olin
g he
at re
mov
al
capa
city
.
Not
e 5
TCV
-2-3
901
SWM
-22
Fails
ope
n. D
iver
ts se
rvic
e w
ater
from
the
isol
atio
n co
nden
ser m
akeu
p or
the
shut
dow
nN
ote
14
*MO
-3-0
302-
8or
*AO
-3-0
302-
6A a
ndA
O-3
-030
2-6B
CR
DM
-365
Spur
ious
clo
sure
pre
vent
s RPV
mak
eup
from
coo
ling
wat
er li
ne d
urin
g sh
utdo
wn
with
the
isol
atio
n co
nden
ser
Not
e 21
MO
-3-1
001-
1Aan
dM
O-3
-100
1-1B
SCM
-363
Failu
re o
f the
se v
alve
s to
open
isol
ates
the
shut
dow
n co
olin
g sy
stem
from
the
RPV
.N
otes
6 &
8
MO
-3-1
001-
2A,
MO
-3-1
001-
2B,
and
MO
-3-1
001-
2C
SCM
-363
Failu
re o
f the
se v
alve
s to
open
isol
ates
the
shut
dow
n co
olin
g sy
stem
from
the
RPV
.N
otes
6 &
8
MO
-3-1
001-
4A,
MO
-3-1
001-
4Ban
dM
O-3
-100
1-4C
SCM
-363
Failu
re o
f the
se v
alve
s to
open
isol
ates
the
shut
dow
n co
olin
g sy
stem
from
the
RPV
.N
ote
6
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-3
2
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
001-
5Aan
dM
O-3
-100
1-5B
SCM
-363
Failu
reof
thes
e va
lves
to o
pen
isol
ates
the
shut
dow
n co
olin
g sy
stem
from
the
RPV
.N
ote
6
*AO
-3-1
501-
25A
and
*AO
-3-1
501-
25B
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
isol
ates
the
shut
dow
n co
olin
g sy
stem
fr
om th
e R
PV. B
oth
valv
es a
re in
acce
ssib
le si
nce
they
ar
e lo
cate
d in
the
dryw
ell.
Not
e7
MO
-3-1
501-
22A
,M
O-3
-150
1-38
Aan
dM
O-3
-150
1-20
A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
omR
PV to
wet
wel
l.N
ote
6
MO
-3-1
501-
22A
,M
O-3
-150
1-21
A,
MO
-3-1
501-
18A
and
MO
-3-1
501-
19A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
omR
PV in
ject
ion
pipi
ng to
toru
s spr
ay h
eate
r.N
ote
6
MO
-3-1
501-
22A
,M
O-3
-150
1-21
A,
MO
-3-1
501-
27A
and
MO
-3-1
501-
28A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
om
RPV
to th
e dr
ywel
l spr
ay h
eade
r.N
otes
5 &
6
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-3
3
Pote
ntia
lSp
urio
us C
ompo
nent
1,2
Syst
em3
Mec
hani
cal/E
lect
rical
Dra
win
gsC
once
rn W
ith M
alfu
nctio
nR
esol
utio
nM
O-3
-020
2-4A
(N.O
.)an
dM
O-3
-020
2-5A
(N.O
.)
Rx
Rec
irc.
M-3
57(S
ht. 1
)Sp
urio
us o
peni
ng p
rovi
des a
flow
pat
h fo
r the
shut
dow
n co
olin
g flo
w w
hich
byp
asse
s the
RPV
and
def
eats
the
syst
em. N
ote:
The
se v
alve
s are
loca
ted
in th
e dr
ywel
l an
d ar
e in
acce
ssib
le.
Not
e 5
& 6
MO
-3-3
701
RB
CC
WM
-353
Spur
ious
clo
sure
blo
cks t
he c
oolin
g w
ater
flow
for t
he
shut
dow
n co
olin
g pu
mps
.N
ote
6
MO
-3-3
704
RB
CC
WM
-353
Spur
ious
clo
sure
blo
cks c
oolin
g w
ater
flow
to th
e sh
utdo
wn
cool
ing
heat
exc
hang
ers.
Not
e 6
TCV
-3-3
904A
and
TCV
-3-3
904B
SWM
-355
Spur
ious
clo
sure
blo
cks s
ervi
ce w
ater
flow
to th
e R
BC
CW
S he
at e
xcha
nger
whi
ch re
mov
es d
ecay
hea
t via
th
e sh
utdo
wn
cool
ing
syst
em.
Not
e 6
3-57
72-1
01(I
sola
tion
Dam
per)
DG
V
entil
atio
nM
-974
Spur
ious
clo
sure
of e
xhau
st is
olat
ion
dam
per w
ill c
ause
th
e he
at lo
ad to
be
trapp
ed in
the
dies
el g
ener
ator
cu
bicl
e. H
igh
tem
pera
ture
may
pre
vent
72-
hour
op
erat
ion.
Not
e 16
*S0-
3-52
01(S
ht. 2
)D
O
Tran
sfer
M-4
1Sp
urio
us fa
ilure
to c
lose
whi
le fi
lling
day
tank
(3-5
202)
w
ould
ove
rflo
w d
iese
l oil
to d
rain
s. Th
is w
ould
redu
ce
fuel
oil
supp
ly fo
r em
erge
ncy
pow
er.
Not
e 16
MO
-3-2
301-
6H
PCI
M-3
74Sp
urio
us c
losu
re w
ill is
olat
e th
e H
PCI p
umps
from
co
nden
sate
stor
age
tank
2/3
B-3
303.
Not
e 16
MO
-3-2
301-
9H
PCI
M-3
74Sp
urio
us c
losu
re w
ill is
olat
e th
e H
PCI i
njec
tion
from
the
RPV
.N
ote
16
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-3
4
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-2
301-
8H
PCI
M-3
74Fa
ilure
of t
his v
alve
to o
pen
will
isol
ate
HPC
I inj
ectio
n fr
om th
e R
PV.
Not
e 16
*AO
-3-2
301-
7H
PCI
M-3
74Sp
urio
us o
peni
ng c
ould
resu
lt in
loss
of r
eact
or c
oola
nt.
Not
e 7
MO
-3-2
301-
35an
dM
O-3
-230
1-36
HPC
IM
-374
Failu
re o
f the
se v
alve
s to
open
pre
vent
s the
HPC
I pum
ps
from
dra
inin
g w
ater
from
the
supp
ress
ion
pool
.N
ote
4
MO
-3-2
301-
14H
PCI
M-3
74Sp
urio
us o
peni
ng o
f val
ve w
ill d
iver
t HPC
I inj
ectio
n flo
w to
the
wet
wel
l thu
s red
ucin
g H
PCI i
njec
tion
into
R
PV, a
lso
prov
ides
a p
ath
for C
ST d
rain
dow
n.
Not
e 16
MO
-3-2
301-
10an
dM
O-3
-230
1-15
HPC
IM
-374
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert p
art o
f H
PCI i
njec
tion
flow
from
RPV
to C
ST 2
/3B
-330
3.N
ote
5
*PC
V-3
-230
1-46
HPC
IM
-374
Spur
ious
clo
sure
will
isol
ate
the
HPC
I tur
bine
gla
nd se
al
cond
ense
r and
lube
oil
cool
er c
oola
nt fl
ow fr
om th
e H
PCI p
ump
disc
harg
e.
Not
e 17
*MO
-3-2
301-
48
SO-3
-330
1SO
-3-3
302
HPC
I
Con
dens
ate
M-3
74
M-3
48
Spur
ious
clo
sure
will
isol
ate
the
HPC
I tur
bine
gla
nd se
al
cond
ense
r and
lube
oil
cool
er c
oola
nt fl
ow a
nd w
ill
isol
ate
the
HPC
I suc
tion
from
the
cond
ense
r hot
wel
l.
Spur
ious
ope
ratio
n of
thes
e va
lves
cou
ld c
ause
CST
dr
ain
dow
n.
Not
e 11
Not
e 30
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-3
5
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-2
301-
3H
PCI
M-3
74Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
will
isol
ate
the
RPB
stea
m su
pply
to th
e H
PCI t
urbi
ne.
Spur
ious
ope
ning
of t
his v
alve
wou
ld re
sult
in lo
ss o
f re
acto
r inv
ento
ry to
the
supp
ress
ion
pool
.
Not
e 16
Not
e 28
MO
-3-2
301-
4or
MO
-3-2
301-
5
HPC
IM
-374
Failu
re o
f the
se v
alve
s in
the
clos
ed p
ositi
on w
ill is
olat
e th
e H
PCI t
urbi
ne fr
om th
e R
PV st
eam
supp
ly. N
ote:
M
O-3
-230
1 is
loca
ted
in th
e dr
ywel
l and
is in
acce
ssib
le.
Not
e 16
MO
-3-1
501-
5ALP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3A
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol re
duci
ng th
e po
ol
cool
ing
flow
.
Not
e 12
MO
-3-1
501-
5BLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3B
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol re
duci
ng th
e po
ol
flow
.
Not
e 12
MO
-3-1
501-
18A
and
MO
-3-1
501-
19A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus f
ull f
low
test
line
to
the
toru
s spr
ay h
eade
r.
Not
e 5
MO
-3-1
501-
20A
,M
O-3
-150
1-38
Aan
dM
O-3
-150
1-21
A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus s
pray
hea
der t
o th
e to
rus f
ull f
low
test
line
.
Not
e 5
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-3
6
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
22A
,*A
O-3
-150
1-25
Aan
dM
O-3
-150
1-21
A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
cou
ld re
sult
in lo
ss o
f rea
ctor
in
vent
ory.
Not
e 7
MO
-3-1
501-
27A
and
MO
-3-1
501-
28A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e w
etw
ell t
o th
e dr
ywel
l spr
ay
ring
head
er th
us re
duci
ng p
ool c
oolin
g flo
w.
Not
e 5
MO
-3-1
501-
22A
MO
-3-1
501-
38A
and
MO
-3-1
501-
20
SC &
LPC
IM
-363
M-3
60(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s fue
l flo
w te
st li
ne.
Not
e 6
MO
-3-1
501-
22A
,M
O-3
-150
1-21
A,
MO
-3-1
501-
18A
and
MO
-3-1
501-
19A
SC &
LPC
IM
-363
M-3
60(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s spr
ay
head
er.
Not
e 6
MO
-3-1
501-
32B
and
MO
-3-1
501-
32A
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
A"
pum
p fr
om L
PCI "
B"
wet
wel
l inj
ectio
n el
imin
atin
g a
poss
ible
inje
ctio
n pa
th.
Not
e 6
MO
-3-1
501-
11A
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 3
A-1
503.
Not
e 6
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-3
7
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*MO
-3-1
402-
4AC
SM
-358
Spur
ious
ope
ning
of v
alve
wou
ld d
iver
t LPC
I poo
l co
olin
g re
turn
flow
to th
e co
re sp
ray/
RPV
inje
ctio
n pi
ping
.
Not
es 5
, 12
MO
-3-1
501-
13A
LPC
IM
-360
Failu
re o
f thi
s val
ve in
the
open
pos
ition
wou
ld d
irect
LP
CI p
ump
disc
harg
e di
rect
ly to
the
wet
wel
l thu
s by
pass
ing
heat
exc
hang
er 3
B-1
503.
The
end
resu
lt is
a
redu
ctio
n in
the
LPC
I hea
t rem
oval
cap
acity
.
Not
e 6
MO
-3-1
501-
3ASW
M-3
60(S
ht. 1
)Fa
ilure
of t
his v
alve
in th
e cl
osed
pos
ition
wou
ld is
olat
e th
e se
rvic
e w
ater
retu
rn fr
om th
e co
ntai
nmen
t coo
ling
heat
exc
hang
er. T
his f
ailu
re w
ould
com
plet
ely
dete
ct th
e he
at re
mov
al c
apab
ility
of t
he L
PCI s
yste
m.
Not
e 6
MO
-3-1
501-
5CLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3C
-150
2 su
ctio
n fr
om su
ppre
ssio
n po
ol.
Not
e 16
MO
-3-1
501-
5DLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3D
-150
2 su
ctio
n fr
om su
ppre
ssio
n po
ol.
Not
e 16
MO
-3-1
501-
18B
and
MO
-3-1
501-
19B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus f
uel f
low
test
line
to
the
toru
s spr
ay h
eade
r.
Not
e 5
MO
-3-1
501-
38B
,M
O-3
-150
1-20
Ban
dM
O-3
-150
1-21
B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e to
rus s
pray
hea
der t
o th
e to
rus f
uel f
low
test
line
.
Not
e 5
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-3
8
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
21B
,M
O-3
-150
1-22
Ban
d*A
O-3
-150
1-25
B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
cou
ld re
sult
in lo
ss o
f rea
ctor
in
vent
ory.
Not
e 7
MO
-3-1
501-
27B
and
MO
-3-1
501-
28B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI p
ool
cool
ant r
etur
n flo
w fr
om th
e w
etw
ellt
o th
e dr
ywel
l spr
ay
ring
head
er.
Not
e 5
MO
-3-1
501-
22B
,M
O-3
-150
1-38
Ban
dM
O-3
-150
1-20
B
SC &
LPC
IM
-363
M-3
60(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s fue
l flo
w te
st li
ne.
Not
e 6
MO
-3-1
501-
22B
,M
O-3
-150
1-21
B,
MO
-3-1
501-
18B
and
MO
-3-1
501-
19B
SP &
LPC
IM
-363
M-3
60(S
ht. 1
)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
allo
w sh
utdo
wn
cool
ing
flow
to e
nter
the
wet
wel
l thr
ough
the
toru
s spr
ay
head
er.
Not
e 6
MO
-3-1
501-
32B
and
MO
-3-1
501-
32A
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
B"
pum
p fr
om L
PCI "
A"
wet
wel
l inj
ectio
nN
ote
6
MO
-3-1
501-
11B
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 3
-B-1
503.
Not
e 15
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-3
9
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
*MO
-3-1
402-
4BC
SM
-358
Spur
ious
ope
ning
of v
alve
wou
ld d
iver
t LPC
I poo
l co
olin
g re
turn
flow
to th
e co
re sp
ray/
RPV
inje
ctio
n pi
ping
.
Not
e 18
MO
-3-1
501-
13B
LPC
IM
-360
(Sht
. 1)
Failu
re o
f the
se v
alve
in th
e op
en p
ositi
on w
ould
div
ert
LPC
I pum
p di
scha
rge
dire
ctly
to th
e w
etw
ell t
hus
bypa
ssin
g he
at e
xcha
nger
3A
-150
3. T
his f
ailu
re w
ould
re
sult
in a
redu
ctio
n in
the
LPC
I hea
t rem
oval
cap
abili
ty.
Not
e 16
MO
-3-1
501-
3BSW
M-3
60(S
ht. 1
)Sp
urio
us c
losu
re o
f thi
s val
ve w
ould
isol
ate
the
serv
ice
wat
er fl
ow fr
om th
e co
ntai
nmen
t coo
ling
heat
exc
hang
er.
This
failu
re w
ould
com
plet
ely
defe
at th
e he
at re
mov
al
capa
bilit
y of
the
LPC
I coo
ling
syst
em.
Not
e 16
MO
-3-1
501-
5ALP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3A
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
R
PV in
ject
ion
flow
.
Not
e 12
MO
-3-1
501-
5BLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3B
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
R
PV in
ject
ion
flow
.
Not
e 12
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-4
0
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
18A
,M
O-3
-150
1-19
A,
MO
-3-1
501-
20A
,M
O-3
-150
1-21
Aan
dM
O-3
-150
1-38
A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
wet
wel
l the
refo
re
redu
cing
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-3-1
501-
27A
and
MO
-3-1
501-
28A
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
dryw
ell s
pray
ring
he
ader
ther
efor
e re
duci
ng R
PV in
ject
ion
flow
.
Not
e 5
MO
-3-1
501-
11A
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 3
A-1
503.
Not
e 12
MO
-3-1
501-
32A
and
MO
-3-1
501-
32B
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sure
of t
hese
val
ves w
ill is
olat
e LP
CI "
A"
pum
ps fr
om L
PCI "
B"
RPV
inje
ctio
n pi
ping
thus
el
imin
atin
g a
poss
ible
inje
ctio
n pa
th.
Not
e 13
*MO
-3-1
402-
4A,
MO
-3-1
501-
38A
and
MO
-3-1
501-
20A
LPC
I & C
SM
-360
(Sht
. 1)
M-3
58
Spur
ious
ope
ning
of v
alve
s wou
ld d
iver
t LPC
I RPV
in
ject
ion
flow
to th
e co
re sp
ray
pipi
ng th
us re
duci
ng
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-3-1
501-
13A
LPC
IM
-360
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
wou
ld d
irect
LP
CI p
ump
disc
harg
e di
rect
ly to
the
wet
wel
l. Th
e en
d re
sult
bein
g a
redu
ctio
n in
the
RPV
inje
ctio
n flo
w.
Not
e 13
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-4
1
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
3ASW
M-3
60(S
ht. 1
)Fa
ilure
of t
hisv
alve
in th
e cl
osed
pos
ition
wou
ld is
olat
e th
e se
rvic
e w
ater
retu
rn fr
om th
e co
ntai
nmen
t coo
ling
heat
exc
hang
er. T
his f
ailu
re w
ould
com
plet
ely
defe
ct th
e he
at re
mov
al c
apab
ility
of t
he L
PCI s
yste
m.
Not
e 12
MO
-3-1
501-
5CLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3C
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
R
PV in
ject
ion
flow
.
Not
e 13
MO
-3-1
501-
5DLP
CI
M-3
60(S
ht. 1
)Sp
urio
us v
alve
clo
sure
will
isol
ate
LPC
I pum
p 3D
-150
2 su
ctio
n fr
om th
e su
ppre
ssio
n po
ol th
eref
ore
redu
cing
R
PV in
ject
ion
flow
.
Not
e 13
MO
-3-1
501-
18B
,M
O-3
-150
1-19
B,
MO
-3-1
501-
20B
,M
O-3
-150
1-21
Ban
dM
O-3
-150
1-38
B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
wet
wel
lthe
refo
re
redu
cing
RPV
inje
ctio
n flo
w.
Not
e 5
MO
-3-1
501-
27B
and
MO
-3-1
501-
28B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
of t
hese
val
ves w
ould
div
ert L
PCI
inje
ctio
n flo
w fr
om th
e R
PV to
the
dryw
ell s
pray
ring
he
ader
ther
efor
e re
duci
ng R
PV in
ject
ion
flow
.
Not
e 5
MO
-3-1
501-
11B
LPC
IM
-360
(Sht
. 1)
Spur
ious
clo
sing
will
div
ert a
ll LP
CI p
ump
disc
harg
e th
roug
h co
ntai
nmen
t coo
ling
heat
exc
hang
er 3
B-1
503.
Not
e 15
DR
ESD
EN 2
&3
AM
END
MEN
T 19
JUN
E 20
13
B-4
2
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
32A
and
MO
-3-1
501-
32B
LPC
I M
-360
(Sht
. 1)
Spur
ious
clo
sure
will
isol
ate
LPC
I "B
" pu
mps
from
LP
CI "
A"
RPV
inje
ctio
n pi
ping
thus
elim
inat
ing
a po
ssib
le in
ject
ion
path
.
Not
e 13
MO
-3-1
402-
4B,
MO
-3-1
501-
20B
and
MO
-3-1
501-
38B
LPC
I & C
SM
-360
(Sht
. 1)
M-3
58
Spur
ious
ope
ning
of v
alve
s wou
ld d
iver
t LPC
I RPV
in
ject
ion
to th
e co
re sp
ray
inje
ctio
n pi
ping
.N
ote
5
MO
-3-1
501-
13B
LPC
IM
-360
(Sht
. 1)
Failu
re o
f thi
s val
ve in
the
open
pos
ition
wou
ld d
iver
t LP
CI p
ump
disc
harg
e to
the
wet
wel
l. Th
is fa
ilure
wou
ld
resu
lt in
a re
duct
ion
in th
e LP
CI R
PV in
ject
ion
flow
.
Not
e 16
MO
-3-1
501-
3BSW
M-3
60(S
ht. 1
)Sp
urio
us c
losu
re o
f thi
s val
ve w
ould
isol
ate
the
serv
ice
wat
er fl
ow fr
om th
e co
ntai
nmen
t coo
ling
heat
exc
hang
er.
This
failu
re w
ould
com
plet
ely
defe
at th
e he
at re
mov
al
capa
bilit
y of
the
LPC
I sys
tem
.
Not
e 16
SO-3
-220
-47
and
SO-3
-220
-46
Hea
d V
ent
M-3
57(S
ht. 1
)Sp
urio
us o
peni
ng o
f hea
d ve
nt v
alve
s cou
ld re
sult
in lo
ss
of in
vent
ory.
Not
e 5
MO
-3-1
501-
22B
,M
O-3
-150
1-38
Ban
dM
O-3
-150
1-20
B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g flo
w fr
omR
PV to
wet
wel
l.N
ote
6
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
B-4
3
TAB
LE B
-2
POTE
NTI
AL
SPU
RIO
US
CO
MPO
NEN
T O
PER
ATI
ON
S TH
AT
CO
ULD
AFF
ECT
SAFE
SH
UTD
OW
N -
DR
ESD
EN U
NIT
3Po
tent
ial
Spur
ious
Com
pone
nt1,
2Sy
stem
3M
echa
nica
l/Ele
ctric
alD
raw
ings
Con
cern
With
Mal
func
tion
Res
olut
ion
MO
-3-1
501-
22B
,M
O-3
-150
1-21
B,
MO
-3-1
501-
18B
and
MO
-3-1
501-
19B
LPC
IM
-360
(Sht
. 1)
Spur
ious
ope
ning
div
erts
shut
dow
n co
olin
g fr
om R
PV to
dr
ywel
l spr
ay h
eade
r.N
otes
5 &
6
AO
-3-0
301-
156
A(B
)A
O-3
-030
1-15
7 A
(B)
AO
-3-0
301-
160
A(B
)A
O-3
-030
1-16
1 A
(B)
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29
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.1-1
1.0 INTRODUCTION 1.1 Objective Paragraph 50.48(b) of 10CFR50, which became effective on February 17, 1981, requires all nuclear plants licensed to operate prior to January 1, 1979, to comply with III.G, III.J and III.O, of Appendix R to 10CFR50, regardless of the status of previous Fire Protection Safety Evaluation Reports (FPSERs). Section III.G requires that fire protection features be provided for those systems, structures, and components important to safe shutdown. These features must be capable of limiting fire damage so that: 1. One train of systems necessary to achieve and maintain hot shutdown conditions from
either the main control room or the emergency control station(s) is free of fire damage, and
2. Systems necessary to achieve and maintain cold shutdown from either the main control
room or the emergency control station(s) can be repaired within 72 hours. Section III.L of Appendix R and Enclosure 1 "Staff Position" of Generic Letter 81-12 (February 20, 1981) provide additional guidance on the NRC Staff's requirements for this safe shutdown capability. Section III.J requires that emergency lighting units with at least an 8-hour battery power supply shall be provided in all areas needed for operation of safe shutdown equipment and in access and egress routes thereto. Section III.O establishes requirements for oil collection systems for Reactor Coolant Pumps. This section is not applicable to Dresden 2&3 because the containment is inerted during normal operation. The objective of this analysis is to provide technical basis for achieving compliance with 10CFR50, Appendix R, Sections III.G, III.L and III.J. This objective is achieved by first identifying the minimum set of equipment necessary to achieve safe shutdown. This equipment will be referred to as Appendix R safe shutdown equipment. (Note: Dresden Station has other systems for achieving safe shutdown.) Then, this equipment is evaluated on a fire area basis to determine if there is adequate separation or an alternate shutdown method is available independent of the subject fire area. A plant walkdown was performed to verify the adequacy of emergency lighting to support manual operations. Where deficiencies have been found, a modification has been proposed and/or an exemption from the specific Appendix R requirements has been requested. The exemption requests are found in Volume 3 of the Fire Protection Program Documentation Package (F.P.P.D.P.) and the modifications are discussed in Section 6.0 of this report. For the purposes of this analysis, proposed modifications and procedures are assumed to have been implemented.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.1-2
1.1.1 Development of the 1985 Safe Shutdown Report The major inputs to the safe shutdown report are the 1982 Associated Circuits Report and the 1984 Interim Measures/Exemption Requests. Additional inputs to the safe shutdown report are listed below along with the associated reports or studies used to prepare them. 1. Associated Circuits Analysis
a. Valve spurious operations analysis
b. Maloperation analysis
c. Spurious breaker operation analysis
d. Current transformer/control power transformer analysis
e. Redundant fusing of control circuit analysis
f. Coordinated fault protection analysis
g. Cable discrepancy study 2. Timeline Analysis
a. Reactor water makeup time consideration 3. Communication Capabilities Review 4. Accessibility Study of Safe Shutdown Equipment
a. Identification of manual actions 5. Location of Emergency Lighting
a. Identification of manual actions
b. Identification of access paths
c. Physical location of the equipment
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.2-1
1.2 Safe Shutdown Functions and Assumptions This report documents the review of the required safe shutdown functions to achieve and maintain cold shutdown conditions for Dresden Station, Units 2 and 3. The development of this report is described in Subsection 1.1.1. The specific safe shutdown functions necessary to satisfy the Appendix R criteria of achieving and maintaining hot and cold shutdown, are as follows:
1. Reactivity Control 2. Reactor Coolant Makeup 3. Reactor Pressure Control and Decay Heat Removal 4. Suppression Pool Cooling 5. Process Monitoring 6. Support.
These safe shutdown functions are described in Chapter 3. Various analytical methods can be used to determine that sufficient plant systems are available to perform the identified safe shutdown functions. Numerous plant systems are normally available, alone or in combination with other systems, to provide these required functions. However, the exact location and specific effects of fires cannot be precisely determined. In general, recognizing the confined nature of fires in nuclear plant environments, the inherent operational flexibility, physical diversity of system available to achieve safe shutdown, and appropriate plant fire protection features limit the potential fire damage to the extent that unaffected plant systems will be available to attain safe shutdown. An extensive effort would be required to identify the effects of a postulated fire on all of the plant systems that are available to support safe shutdown in any particular fire area. As an alternative to such an approach, a minimum set of plant systems (Appendix R safe shutdown systems) and components were identified in response to the requirements of Appendix R. This minimum set of systems and components can achieve and maintain safe shutdown with or without a loss of offsite power for a fire at any location in the plant. The development of the minimum set of equipment to achieve and maintain safe shutdown was through an iterative process and is shown on Figure 1.2-1. The process of identifying the safe shutdown equipment started with a review of the unit system descriptions. Using the guidance of Generic Letter 81-12, system P&IDs, wiring diagrams, and cable routing diagrams, an essential and associated circuit review was accomplished. The unit cable charts were then produced and used as an aid to identify the minimum set of equipment available to achieve and maintain hot shutdown for each fire area. Adequate protection of this minimum set of plant systems from the effects of postulated fires constitutes an adequate and conservative approach to show the ability to achieve and maintain cold shutdown for the purpose of fire protection. Spurious operations of components that may adversely affect safe shutdown systems have been identified and are addressed within this report. (Refer to Sections 5.1 and 5.6.) The number of modifications were minimized by taking credit for manual operation of existing equipment wherever possible. See subsection 3.3 for assumptions for the associated circuits analysis.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.2-2
Figure 1.2-2 describes the development of Exemption Requests and Interim Measures for Dresden Units 2 and 3. The safe shutdown systems selected for Dresden Station, Units 2 and 3, are capable of achieving and maintaining safe hot shutdown conditions in the reactor, maintaining reactor coolant inventory, commencing activities to achieve cold shutdown conditions within 72 hours after scram, and maintaining cold shutdown conditions thereafter assuming a "worst case" fire. For this analysis, the following assumptions have been made: 1. The "worst case" fires are not postulated to be simultaneous with non-fire related failures
in safety systems, plant accidents, outages of components or systems required for safe shutdown or the most severe natural phenomena. Loss of offsite power is assumed possible simultaneous with the fire.
2. The postulated "worst case" fire is assumed to disable all equipment and cabling within
each fire area (or equivalent fire area/zone group) except where a) equipment or cables are protected by fire barriers or b) components such as pipes, heat exchangers, valves, and CRD hydraulic units are filled with water. Exceptions to this postulated damage are identified in specific exemption requests.
3. No random single failure is considered other than those failures directly attributable to
the fire. Only a single spurious valve operation is postulated to occur as a result of the fire where multiple valves are provided in series except in a high-low pressure interface (see assumption 4).
4. For valves in a high-low pressure interface line the simultaneous spurious operation of all
normally closed valves in series is assumed. 5. The station is operating at 100% power upon occurrence of a fire. 6. Credit is taken for reactor scram and verification of control rod insertion from the control
room. Should control room evacuation be necessary, reactor scram will be initiated by procedure prior to evacuation. Reactor scram may be either manually or automatically initiated.
7. In respect to the usage of offsite power to provide safe shutdown for the plant, it was
assumed that if offsite power is available, it will be utilized.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.3-1
1.3 Report Overview This report contains seven sections. Section 2 identifies the fire areas and equivalent fire areas that were evaluated to support the Appendix R analyses described in this report. Criteria for establishing fire areas are discussed. Section 3 describes the minimum safe shutdown system and components analyzed. A description of the relevant types of associated circuits reviewed is provided. Section 4 describes the results of the hot and cold safe shutdown analysis for each fire area. Section 5 describes the supporting associated circuits analyses including spurious valve operation, breaker spurious operation, CT/CPT, redundant refusing, and coordinate fault protection. Section 6 provides a summary description of the various fire protection modifications necessary to achieve conformance or equivalence with the requirements of Appendix R. Section 7 provides a discussion of the alternative Appendix R shutdown procedures. Also, the cold shutdown repair procedures are described.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.4-1
1.4 Background As part of the continuing NRC evaluation following the fire at the Browns Ferry Nuclear Station in March 1975, Commonwealth Edison Company (CECo) has outlined its fire protection program and features at Dresden Nuclear Power Station in a number of documents submitted to the NRC between 1976 and the present. The document entitled, "Information Relevant to Fire Protection Systems and Programs-Parts 1-3, April 1977," (see F.P.P.D.P. Volumes 1-3) provided CECo's response to the NRC's initial request for a comparison of the fire protection provisions of Dresden Station with the guidelines of Appendix A to BTP 9.5-1. This was CECo's first Fire Hazards Analysis of Dresden Station and resulted in a number of fire protection modifications. CECo also responded to NRC guidelines regarding nuclear power plant fire protection programs issued in the following documents: 1. Supplementary Guidance on Information Needed for Fire Protection Evaluation,
September 30, 1976, 2. Sample Technical Specifications, May 12, 1977, and 3. Nuclear Plant Fire Protection Functional Responsibilities, Administrative Controls, and
Quality Assurance, June 14, 1977. Following the review of these CECo submittals and a plant inspection, the NRC staff docketed a Fire Protection Safety Evaluation Report (FPSER) for Dresden Units 2 and 3 in March 1978. A staff letter of February 12, 1981, confirmed that all FPSER items were considered closed with the one exception being "Safe Shutdown Capabilities." Implementation of these guidelines resulted in additional fire protection measures being incorporated to enhance the existing fire protection program and satisfy the NRC defense-in-depth philosophy. Many studies and much discussion were also associated with the subsequent NRC fire protection guidelines and requirements. The fire protection rule, Appendix R of 10CFR50, was issued on February 19, 1981, for Dresden Units 2 and 3. At that time the shutdown analyses and subsequent related correspondence for Dresden Station were well underway and being reviewed by the NRC staff. CECo continued to provide the NRC staff with all necessary information for their review of the station's safe shutdown capability. Generic Letter 81-12, "Fire Protection Rule," was issued on February 20, 1981. It presented the NRC staff positions on safe shutdown capability and contained a request for information regarding associated circuits. Subsequently, a clarification to Generic Letter 81-12 was issued which reworded the staff's positions and information requests regarding associated circuits. This clarification was transmitted to CECo for the Dresden Station by letter dated April 30, 1982.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.4-2
On July 1, 1982, CECo submitted the final response and position to Generic Letter 81-12 questions, specifically Safe Shutdown Capability, Associated Circuits, and a listing of the exact shutdown methods and necessary safe shutdown modifications for Dresden Station. Submitted with this response was Dresden Station's Fire Protection Associated Circuits Analysis and Modifications Report (see F.P.P.D.P. Volumes 1-3). The cable discrepancy report was revised and resubmitted August 13, 1982, as a supplement to the Modifications Report. Enclosure E of the July 1, 1982, submittal included the first formal exemption request from the requirement of Appendix R Section III.G.3.b for fixed fire suppression. This request was made for 11 fire zones having electrical equipment critical to the power distribution necessary for normal and emergency operation of safety-related equipment for Units 2 and 3 at Dresden. A formal exemption was granted from the requirements of Section III.G.3 on February 2, 1983. By cover letter dated January 19, 1983 (see F.P.P.D.P. Volume 1), the NRC staff stated that they had completed the review of Dresden 2 and 3 alternate shutdown capability which is used to achieve safe shutdown in the event of a fire. This capability was evaluated against the requirements of Sections III.G and III.L of Appendix R to 10CFR50. Based on this review, the NRC staff concluded that Dresden 2 and 3 was in compliance with Appendix R Items III.G.3 and III.L regarding safe shutdown in the event of a fire. A Safety Evaluation Report (SER) was written on this Appendix R review. The conclusion of this evaluation states: "We (the NRC staff) have reviewed the licensee's proposed alternate shutdown capability for certain designated areas in Dresden Units 2 and 3 in accordance with Appendix R criteria. Based on that review, we conclude that the performance goals for accomplishing safe shutdown in the event of a fire, i.e., reactivity control, inventory control, decay heat removal, pressure control, process monitoring, and support functions are met by the proposed alternate in these areas. Therefore, we conclude that the requirements of Appendix R Sections III.G.3 and III.L are satisfied in the areas identified in Section 2.2 of this Safety Evaluation." On the basis of these conclusions, CECo management was confident that the intent of Appendix R has been satisfied and continued working to implement the identified modifications in accordance with 10CFR50.48 (c) (4). On October 19, 1983, Generic Letter 83-33, which reemphasized NRC positions on certain requirements of Appendix R, was transmitted to Dresden 2 and 3. As a result, CECo management decided to perform a reevaluation of the previous analysis to verify that misinterpretations did not exist.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.5-1
1.5 Governing Regulatory Guidelines The criteria used in this analysis are derived from the following regulatory documents that form the basis for the conclusions and recommendations. 1. "Fire Protection Program for Operating Nuclear Power Plants," 10CFR50 Appendix R
(45 FR 76611, November 19, 1980, and 46 FR 44735, September 8, 1981).
This program requires reasonable assurance be provided that at least one train of systems necessary to achieve and maintain hot shutdown remains free of fire damage in the unlikely event of fire in any plant area. Systems necessary to achieve and maintain cold shutdown conditions may likewise be protected or repaired to the extent that cold shutdown can be achieved within 72 hours.
2. Letter to All Power Reactor Licensees with Plants Licensed Prior to January 1, 1979,
from Mr. D. G. Eisenhut (NRR/DL), Subject: "Fire Protection Rule 45 FR 76602, November 19, 1980 - Generic Letter 81-12," dated February 20, 1981.
This letter was issued subsequent to the promulgation of Appendix R. The purpose of the letter was to identify and clarify the information required for Staff review of licensing submittals describing safe shutdown functions, systems, components and their associated circuits. To this end, Generic Letter 81-12 supplements the final rule and provides additional criteria that must be considered.
3. Memorandum to Mr. D. G. Eisenhut (NRR/DL) from Dr. R. J. Mattson (NRR/DSI),
Subject: "Fire Protection Rule - Appendix R," dated March 22, 1982 (Clarification of Generic Letter 81-12).
Generic Letter 81-12 was clarified by this "Clarification Letter" and transmitted to power reactor licensees between March and May 1982. This letter provided the following:
a. Clarification of the NRC's request for information concerning the alternative or
dedicated shutdown system,
b. Clarification of the definition of associated circuits, and
c. Clarification of NRC request for information concerning associated circuits. 4. Memorandum to Mr. R. H. Vollmer (NRR/DE) from Dr. R. J. Mattson (NRR/DSI),
Subject: "Position Paper on Allowable Repairs for Alternative Shutdown and the Appendix R Requirement for Time Required to Achieve Cold Shutdown, "dated July 2, 1982.
The Mattson to Vollmer memorandum addressed two issues concerning safe shutdown, allowable repairs to achieve safe shutdown, and allowable time to achieve safe shutdown.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.5-2
These issues had resulted from a lack of definition for the term "repairs" and apparent inconsistencies in requirements for repair and shutdown activities relative to the 72-hour limit. This memorandum resolved the principal aspects of these issues as follows:
a. Repair
1. Repair activities may not be credited in assuming hot shutdown system
availability.
2. Manual operation of valves, switches, and circuit breakers is not considered to be a repair activity and, hence, is allowable for hot shutdown systems.
3. Modifications, e.g., wiring changes, are allowed for cold shutdown
systems and/or components that are not used for hot shutdown or whose fire-or fire suppressant-induced maloperations could directly affect hot shutdown systems; these repairs must be achievable prior to the maloperations causing an unrecoverable plant condition.
4. Fuse removal (under most circumstances) from control circuitry is not
allowed for maintaining hot shutdown system availability or mitigating the consequence of potential spurious operation candidates (i.e., post-fire fuse removal from control circuitry of a MOV does not adequately assure that the MOV did not spuriously operate).
5. Fuse removal from either the circuitry of a dc-powered pilot solenoid
controlling an air-operated valve (fail in a safe position) or the control circuitry of an electrically-operated valve starter or switchgear breaker to take manual control of the component is not considered to be a repair activity.
b. Time
1. The sum of the repair time and time to achieve cold shutdown must be less
than or equal to 72 hours. The plant must be capable of achieving cold shutdown within 72 hours using onsite power only.
2. Offsite power is assumed to be restored after 72 hours. The equipment and
systems not needed until 72 hours may be powered by offsite power only. The plant must be at cold shutdown before offsite power is postulated as being available.
5. Memorandum to Dr. R. J. Mattson (NRR/DSI) from Mr. L. S. Rubenstein (DSI/AD),
Subject: "Statement of Staff Position Regarding Source Range Flux, Reactor Coolant Temperature and Steam Generator Pressure Indication to Meet Appendix R, Alternate Shutdown Capability," dated January 7, 1983.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
1.5-3
The Staff documented the process monitoring criteria for Appendix R compliance in the Rubenstein to Mattson memorandum. This document identified the following BWR instrument requirements:
a. Reactor Water Level and Pressure,
b. Suppression Pool Level and Temperature,
c. Isolation Condenser Level,
d. Diagnostic Instrumentation for Shutdown Systems, and
e. Level Indication for All Tanks Used.
6. NRC Positions on Certain Requirements of Appendix R to 10CFR50 (Generic Letter 83-
33) dated October 19, 1983. Generic Letter 83-33 addressed the inconsistencies between the Staff and licensees' interpretation of certain requirements of Appendix R subsequent to evaluation of exemption requests. NRC staff position on the following issues were presented.
a. Detection and Automatic Suppression
b. Fire Areas
c. Structural Steel Related to Fire Barriers
d. Fixed Suppression System
e. Intervening Combustibles
f. Transient Fire Hazards
l
AMENDMENT 12
APRIL 1977 FIRE HAZARD ANALYSIS . JUNE 1978 SAFE SHUTDOVN <SSD) ANALYSIS
. JANUARY 1980 SSD SUPPLEMENT I <COLD SHUTDO\JN)
SYSTEM DESCRIPTIONS i--.a-----------------------,
CECO •PER. INPUT
P&.ID
CECO REVIE\J
GENERC LETTER
CLARIFICATION TO GENERIC LETTER 81-12
\./IRING DIAGRAMS
SCHEMATIC DIAGRAMS
CABLE ROUTINGS
EQUIPMENT LOCATIONS
1982 ST A TION DESIGN
1982 ESSENTIAL g, ASSOCIATED CIRCUIT REVIEV
1982 CABLE
CHARTS
1982 FINAL CABLE CHARTS
DISCREPANCY TABLE
MODS B. MANUAL ACTIONS
ASSOCIATED CIRCUITS ANALYSIS JUNE 1982 (ZONE BASIS)
NO
JULY 1982 EXEMPTION REQUESTS
DRESDEN STATION Units 2 & 3
FIGURE 1.2-1
DEVELOPMENT OF DRESDEN 1982 ASSOCIATED CIRCUITS ANALYSIS
l JANUARY 1980
SAFE SHUTDOVN REPORT JUNE 1982 ASSOCIATED
AMENDMENT 12
SUPPLEMENT I ..__ _ _, - CIRCUITS ANALYSIS <ZONE BASIS) (COLD SHUTDOVN)
CECO •PER. INPUT
1982 CABLE
CHARTS
CONDUIT AS BUILT
D\./G'S
PLC 1977 FHA &. FIRE BARRIER
REVIE\.J
' ' CHANGE FROM ZONE TO AREA
APPROACH
SYSTEM DESCRIPTION
PB.ID
CECO REVIE\./
GENERC LETTER
VIRING DIAGRAMS
SCHEMATIC DIAGRAMS
CABLE ROUTINGS
EQUIPMENT LOCATIONS
REVIE\./ OF 1982 TO 1984 MODS
ESSENTIAL 8. ASSOCIATED CIRCUIT REVIE\./ OF 1982 TO 1984 MODS
1984 CABLE CHARTS INCLUDES ALL MODS
TO 1984 EXCEPT APP R MODS
MINI-MAPS
ZONE INTERACTION
ANALYSIS
A
CONT'D ON PAGE 2 OF 2
CABLE ROUTINGS FOR MODS
RESULT ING FROM 1982 ASSOCIATED CIRCUIT ·ANALYSIS
DRESDEN STATION Units 2 8x 3
FIGURE 1.2-2 DEVELOPMENT OF DRESDEN 1982
EXEMPTION REQUESTS AND INTERIM MEASURES (SHEET 1 OF 2)
(
l
IDENTIFY MODIFICATION
REQUIRED
INTERIM MEASURES
ELECTRICAL MODIFICATIONS
I I VARIOUS EXEMPTIONS l
VITHDRAVN
SEPTEMBER OCTOBER 1985 1985
SUBMITTAL: SUBMITTAL: 3.2, 3.3, 3.8, 4.8, 4.9 4.2, 5.2 4.10, 9.1,
9.2, 10.1
CONT'D FROM PAGE 1 OF 2
DEFINE FIRE AREAS AND SAFE SHUTDOVN
PATHS
DISCREPENCY CABLES
IDENTIFY MANUAL
ACTIONS REQUIRED
MECHANICAL MODIFICATIONS
IDENTIFY EXEMPTION REQUESTS REQUIRED
ORIGINAL EXEMPTION REQUESTS SUBMITTED
AUGUST 1984
AMENDMENT 12
REVISION I TO ORIGINAL EXEMPTIONS IN SEPTEMBER 1985
ADDITIONAL EXEMPTION REQUESTS SUBMITTED IN OCTOBER 1985
MAY 30, 1986 LETTER TO NRR
I
REQUEST NRR REVIEV
VITHDRAVN EXEMPTIONS
VRT INDEPENDENCE
r I
REVISION I ADDITIONAL TO OCTOBER EXEMPTIONS
1985 REQUESTS EXEMPTIONS: 7.2, 7.3
3.8,4.10, 9.2
I I I
EXEMPTION REQUEST FOR DRYVELL
EXPANSION GAP SUBMITTED IN JUNE 1986
DRESDEN STATION Units 2 & 3
FIGURE 1.2-2 DEVELOPMENT OF DRESDEN 1982
EXEMPTION REQUESTS AND INTERIM MEASURES <SHEET 2 OF 2)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.1-1
2.0 IDENTIFICATION OF FIRE AREAS
2.1 Zone Interaction Analysis Procedure
The Dresden 2 and 3 Associated Circuits Analysis and Modifications Report, submitted to the NRC in July 1982 in response to Generic Letter 82-12, was based on fire zones as defined in the 1977 Fire Hazards Analysis, not on fire areas. (See 1978 Fire Protection Safety Evaluation Report, F.P.R. Volume 5.) The 1982 report identified alternate shutdown methods to be utilized in the event of a fire in any fire zone and presented modifications related to both fire protection and safe shutdown which enhance the station personnel's ability to safely shut down in the event of a "worst case" fire. These modifications were not affected by the 1984 reanalysis. The Appendix R reverification analysis, documented in this report, confirmed that the shutdown methods identified for each fire zone and the modifications proposed in the 1982 report are indeed appropriate. However, in light of the staff positions presented in Generic Letter 83-33, some additional modifications were proposed as a result of the 1984 analysis to ensure separation between shutdown methods commensurate with the requirements of 10CFR50 Appendix R.
The 1984 reevaluation of Dresden Station Units 2 and 3 compliance with Section III.G of Appendix R was accomplished by conducting a fire zone interaction analysis. This method of analysis consists of examining individual plant fire zones and determining (a) what Appendix R safe shutdown components, including associated circuitry, are present in the zone, (b) what safe shutdown components are present in all adjacent zones, and (c) what constitutes the boundary between adjacent zones. Given this information and the location of equipment and cabling associated with the hot shutdown paths identified in the 1982 Associated Circuits Analysis, it was then determined where deviations from the criteria of Sections III.G and III.L of Appendix R existed. Where it was determined that a fire could possibly spread from a zone to an adjacent zone due to unsealed penetration, hatchways, etc., the configuration of equipment, cabling, and barriers was analyzed and a resolution was achieved in one of three ways:
1. The same safe shutdown path was verified to be available for a fire in both zones, so that a fire spread can be tolerated. These zones are now considered part of the same fire area (or equivalent fire area/zone group).
2. A modification was proposed to eliminate the deviation (e.g., upgrading of barriers, installation of suppression systems, rated fire wraps, etc.), or
3. An exemption to Appendix R was requested where the existing and/or proposed level of protection was equivalent to that of Section III.G. These exemption requests provide the justification for treating all equivalent fire areas/zone groups as fire areas in the safe shutdown analysis.
The exemption requests and proposed modifications were transmitted to the NRC by letter of August 10, 1984. Revision 1 to the exemption requests was transmitted to the NRC by letter of September 19, 1985. Subsequent exemption request information was transmitted to the NRC by letter of October 15, 1985. See F.P.R. Volume 4.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.1-2
As a result of the Zone Interaction Analysis, each fire zone utilized in the 1982 analysis has been, in part or in total, incorporated into a fire area as shown in Table 2.1-1 and Figures 2.2-1, 2.2-2 and 2.2-3. These figures schematically show fire area boundaries and identify the hot shutdown path for each fire zone. The fire areas containing safe shutdown equipment and cable are separated from one another by 3-hour rated fire barriers or barriers that are equivalent to a 3-hour rated barrier. Several "equivalent fire areas" have been identified that are not separated by rated barriers nor are exemption requests provided to justify the boundaries of these "fire areas." These fire areas contain no safe shutdown equipment, are separated by substantial barriers for fire, and do not present a hazard to redundant trains of safe shutdown equipment. For each fire area, a shutdown path has been identified which would be free of fire damage and available to bring the plant to hot shutdown given a fire in that fire area. For each fire area, a cold shutdown path has been identified which would be repairable and capable of bringing the plant to cold shutdown within 72 hours using onsite power only. The Dresden 2&3 fire areas are described in Section 2.2.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
2.1-3
TABLE 2.1-1APPENDIX R SHUTDOWN PATHS BY FIRE ZONE
Fire ZoneEquivalent Area
/Zone Group Shutdown PathSafe Shutdown
Analysis Section1.1.1.1 RB3-II A1 4.51.1.1.2 RB3-II A1 4.51.1.1.3 RB3-II A1 4.51.1.1.4 RB3-II A1 4.5
1.1.1.5.A RB3-I D 4.41.1.1.5.B RB3-I D 4.41.1.1.5.C RB3-I D 4.4
1.1.1.5.D * RB3-II A1 4.51.1.1.6* RB3-II B 4.51.2.1** Drywell 4.61.3.1 RB3-II A1 4.51.4.1 RB3-I D 4.4
1.1.2.1 RB2-II B1 4.21.1.2.2 RB2-II B1 4.21.1.2.3 RB2-II B1 4.21.1.2.4 RB2-II B1 4.2
1.1.2.5.A RB2-I C 4.11.1.2.5.B RB2-I C 4.11.1.2.5.C RB2-I C 4.1
1.1.2.5.D* RB2-II B1 4.21.1.2.6* RB2-II A 4.21.2.2** Drywell 4.31.3.2 RB2-I C 4.12.0 TB-V A2 and B2 4.126.1 Western (TB-III) A1 4.106.2 TB-V A2 and B2 4.12
7.0.A.1 Eastern (TB-I) B1 4.87.0.A.2 Eastern (TB-I) B1 4.87.0.A.3 Eastern (TB-I) B1 4.87.0.B Western (TB-III) A1 4.108.1* Eastern (TB-I) B1 4.8
8.2.1.A Eastern (TB-I) B1 4.88.2.1.B Western (TB-III) A1 4.108.2.2.A Eastern (TB-I) B1 4.88.2.2.B Western (TB-III) A1 4.108.2.4 Western (TB-III) A1 4.10
*No shutdown cable or equipment is located in this zone. All methods of shutdown are available.**Drywell is inerted, no fire postulated. All methods of shutdown available.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
2.1-4
TABLE 2.1-1APPENDIX R SHUTDOWN PATHS BY FIRE ZONE
8.2.5.A Eastern (TB-I) B1 4.88.2.5.B Eastern (TB-I) B1 4.88.2.5.C Central (TB-II) A2 and B2 4.98.2.5.D Western (TB-III) A1 4.108.2.5.E Western (TB-III) A1 4.108.2.6.A Eastern (TB-I) B1 4.88.2.6.B Eastern (TB-I) B1 4.88.2.6.C Central (TB-II) A2 and B2 4.98.2.6.D Western (TB-III) A1 4.108.2.6.E Western (TB-III) A1 4.108.2.7 Eastern (TB-I) B1 4.8
8.2.8.A TB-IV A and B* 4.118.2.8.B TB-IV A and B* 4.118.2.8.C TB-IV A and B* 4.118.2.8.D TB-IV A and B* 4.119.0.A Eastern (TB-I) B1 4.89.0.B Western (TB-III) A1 4.109.0.C Diesel Generator 2/3/
HPCI Rooms (RB 2/3)E and F 4.7
11.1.1 RB3-II A1 4.511.1.2 RB3-II A1 4.511.1.3 Diesel Generator 2/3/
HPCI Rooms (RB 2/3)F 4.7
11.2.1 RB2-II B1 4.211.2.2 RB2-II B1 4.211.2.3 Diesel Generator 2/3/
HPCI Rooms (RB 2/3)E 4.7
11.3 Crib House E and F orA and B
4.13
14.1 Radwaste A and B* 4.14
14.2 TB-IV A and B* 4.11
*No shutdown cable or equipment is located in this zone. All methods of shutdown are available.**Drywell is inerted, no fire postulated. All methods of shutdown available.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
2.1-5
TABLE 2.1-1APPENDIX R SHUTDOWN PATHS BY FIRE ZONE
14.3 TB-IV A and B* 4.1114.4 Outdoor A and B* 4.1514.5 Radwaste A and B* 4.1414.6 Radwaste A and B* 4.14
18.1.1 Outdoor A and B* 4.1518.1.2 Outdoor A and B* 4.1518.2.1 Outdoor A and B* 4.1518.2.2 Outdoor A and B* 4.1518.3.1 Outdoor A and B* 4.1518.3.2 Outdoor A and B* 4.1518.4 Outdoor A and B* 4.15
Unit 1 Plant Structures
Outdoor A and B* 4.15
18.6 Outdoor A and B* 4.1518.7.1 Outdoor E and F 4.1518.7.2 Outdoor E and F 4.15
*No shutdown cable or equipment is located in this zone. All methods of shutdown are available.**Drywell is inerted, no fire postulated. All methods of shutdown available.
DRESDEN 2&3 AMENDMENT 14JUNE 2003
2.2-1
2.2 Fire Area Descriptions
2.2.1 Fire Area RB2-1
Fire Area RB2-I is composed of the following zones:
Fire Zone Description F-Drawing
1.1.2.5.A Reactor Building Elevation 589 feet 0 inch 4th Floor-South
F-6
1.1.2.5.B Reactor BuildingElevation 570 feet 0 inchIsolation Condenser Pipe Chase
F-5
1.1.2.5.C Reactor Building Elevation 545 feet 6 inchesIsolation Condenser Pipe Chase
F-4
1.3.2 Reactor Building Elevation 517 feet 6 inchesShutdown Cooling Pump Room
F-3
The Unit 2 Fire Area RB2-I is a collection of three main sections. These are: a) the shutdown cooling pump room, b) the isolation condenser pipe chase, and c) the main isolation condenser floor.
The shutdown cooling pump room, Fire Zone 1.3.2, is surrounded by Fire Zone 1.2.2 (inerted drywell) and Fire Zone 1.1.2.2 on elevation 517 feet 6 inches. All of the walls which separate Fire Zone 1.3.2 from Fire Area RB2-I are 3-hour rated fire barriers except for the west wall which contains a ventilation louver and mechanical penetration open to the steam pipe chase. All penetrations in the ceiling are sealed to a 3-hour rating except for an HVAC duct penetration which is protected by a sprinkler. The floor contains unsealed mechanical penetrations (see Section 3.2 of the Exemption Requests, F.P.R. Volume 4). The access door to this fire zone is 3-hour rated and is normally held open by a fusible link.
The remaining Reactor Building fire zones which are part of Fire Area RB2-I (1.1.2.5.A, 1.1.2.5.B, and 1.1.2.5.C) are interconnected. Fire Zones 1.1.2.5.B and 1.1.2.5.C form the isolation condenser pipe chase. The pipe chase is surrounded and protected from a fire in Fire Area RB2-II by walls and floor which are 3-hour fire barriers. The access doors to the pipe chase (one each on the 545-foot 6-inch and 570-foot 0-inch elevations) are 3-hour rated. The pipe chase is open above to the isolation condenser floor area (Fire Zone 1.1.2.5.A) through an open steel grating.
Fire Zone 1.1.2.5.A, the isolation condenser floor, is enclosed by walls, floor, and ceiling constructed of 3-hour rated reinforced concrete with similarly rated penetrations except that both the floor and ceiling contain large unsealed penetrations, e.g., the equipment hatch, stairwell,
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-2
ladder opening and HVAC ducts which do not contain fire dampers. These major penetrations are protected to an equivalent 3-hour protection in the form of wet pipe sprinklers or an automatic closed-head, preaction water curtain, actuated by a linear thermal detection system as described in Generic Letter 83-33. The ceiling also contains unsealed mechanical penetrations (see Exemption Requests Section 3.3, F.P.R. Volume 4.)
The safe shutdown analysis for Fire Area RB2-I can be found in Section 4.1 of the Safe Shutdown Report (SSDR). A detailed analysis of the fire zones comprising this fire area is in the Fire Hazards Analysis Section 4.1 (F.P.R. Volume 1).
2.2.2 Fire Area RB2-II
Fire Area RB2-II is composed of the following zones:
Fire Zone Description F-Drawing
1.1.2.1 Reactor BuildingElevation 476 feet 6 inches Basement Floor
F-2
1.1.2.2 Reactor BuildingElevation 517 feet 6 inches Ground Floor
F-3
1.1.2.3 Reactor BuildingElevation 545 feet 6 inches Mezzanine Floor
F-4
1.1.2.4 Reactor BuildingElevation 570 feet 0 inch 3rd Floor
F-5
1.1.2.5.D Reactor BuildingElevation 589 feet 0 inch 4th Floor North
F-6
1.1.2.6/ 1.1.1.6
Reactor BuildingElevation 613 feet 0 inch Refueling Floor
F-7
11.2.1 Reactor BuildingElevation 476 feet 6 inches Southwest Corner Room
F-2
11.2.2 Reactor BuildingElevation 476 feet 6 inches Southeast Corner Room
F-2
The Unit 2 Fire Area RB2-II contains all of the Reactor Building fire zones not included in Fire Area RB2-I. It is separated from RB2-I as described in Subsection 2.2.1. This fire area is separated from Unit 3 Fire Area RB3-II by equivalent 3-hour rated fire barriers except for two places. These are: 1) the refuel floor which has no separations between Unit 2 and Unit 3, and 2) the torus basement which is separated by a rated wall except in the equipment drain tank room where the wall contains an unrated door to RB3-II. The wall which separates the Unit 2 LPCI room from the Unit 2 HPCI room contains an HVAC duct which does not contain a fire damper. (See Section 3.3 of the Exemption Requests, F.P.R. Volume 4). This fire area is also separated
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-3
from the Turbine Building by an equivalent 3-hour wall (see Exemption Requests Section 3.3, F.P.R. Volume 4). Contained within this fire area but still separated from it by equivalent 3-hour rated barriers is the drywell and RB2-I. All of the access doors to the fire area are rated to three hours except as noted above.
The safe shutdown analysis for Fire Area RB2-II can be found in Section 4.2. A detailed description of the fire zones comprising this fire area is in the Fire Hazards Analysis Section 4.2 (F.P.R. Volume 1).
2.2.3 Fire Area - Unit 2 Primary Containment
The Unit 2 primary containment (Fire Zone 1.2.2) is separated from the rest of the Reactor Building by an equivalent 3-hour rated fire barrier. The primary containment is inerted, thus, a fire cannot start and a safe cold shutdown can be achieved and maintained using any of the shutdown methods. A detailed description of this fire area is in the Fire Hazards Analysis Section 4.3 (F.P.R. Volume 1).
2.2.4 Fire Area RB3-1
Fire Area RB3-I is composed of the following zones:
Fire Zone Description F-Drawing
1.1.1.5.A Reactor BuildingElevation 589 feet 0 inch 4th Floor-South
F-6
1.1.1.5.B Reactor BuildingElevation 570 feet 0 inchIsolation Condenser Pipe Chase
F-5
1.1.1.5.C Reactor BuildingElevation 545 feet 6 inchesIsolation Condenser Pipe Chase
F-4
1.4.1 Reactor BuildingElevation 517 feet 6 inchesTIP Room
F-3
The Unit 3 Fire Area RB3-I is a collection of three main sections. These are: a) the TIP room, b) the isolation condenser pipe chase, and c) the main isolation condenser floor.
The TIP room, Fire Area 1.4.1, is surrounded by Fire Area 1.2.1 (inerted drywell) and Fire Zone 1.1.1.2 on elevation 517 feet 6 inches. The walls and ceiling surrounding Fire Area 1.4.1 are 3-hour rated barriers. The west wall contains unsealed mechanical penetrations. The floor contains unsealed mechanical penetrations in the floor (see Exemption Requests Section 4.2, F.P.R. Volume 4). The access door to this fire area is 3-hour rated.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-4
The remaining Reactor Building fire zones which are part of Fire Area RB3-I (1.1.1.5.A, 1.1.1.5.B, and 1.1.1.5.C) are interconnected. Fire Zones 1.1.1.5.B and 1.1.1.5.C form the isolation condenser pipe chase. The pipe chase is surrounded and protected from a fire in Fire Area RB3-II by walls and floor which are 3-hour fire barriers. The access doors to the pipe chase (one each on the 545-foot 6-inch and 570-foot 0-inch elevations) are 3-hour rated. The pipe chase is open above to the isolation condenser floor (Fire Zone 1.1.1.5.A) through open steel grating.
Fire Zone 1.1.1.5.A is enclosed by walls, floor, and ceiling constructed of 3-hour rated reinforced concrete with similarly rated penetrations except that both the floor and ceiling of this fire zone contain large unsealed penetrations, e.g., the equipment hatch, ladder opening and HVAC ducts which do not contain fire dampers. These major openings are protected by equivalent 3-hour protection in the form of wet pipe sprinklers or an automatic closed-head, preaction water curtain actuated by a linear thermal detection system as described in Generic Letter 83-33. The ceiling also contains unsealed mechanical penetrations (see Exemption Requests Section 4.2, F.P.R. Volume 4).
A safe shutdown analysis for Fire Area RB3-I can be found in Section 4.4. A detailed analysis of the fire zone comprising this fire area is in Fire Hazards Analysis Section 4.4 (F.P.R. Volume 1).
2.2.5 Fire Area RB3-II
Fire Area RB3-II is composed of the following fire zones:
Fire Zone Description F-Drawing
1.1.1.1 Reactor BuildingElevation 476 feet 6 inches Basement Floor
F-2
1.1.1.2 Reactor BuildingElevation 517 feet 6 inches Ground Floor
F-3
1.1.1.3 Reactor BuildingElevation 545 feet 6 inches Mezzanine Floor
F-4
1.1.1.4 Reactor BuildingElevation 570 feet 0 inch 3rd Floor
F-5
1.1.1.5.D Reactor BuildingElevation 589 feet 0 inch 4th Floor North
F-6
1.1.1.6/1.1.2.6 Reactor BuildingElevation 613 feet 0 inch Refueling Floor
F-7
1.3.1 Reactor BuildingElevation 517 feet 6 inchesShutdown Cooling Pump Room
F-3
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Fire Zone Description F-Drawing
11.1.1 Reactor BuildingElevation 476 feet 6 inchesSouthwest Corner Room
F-2
11.1.2 Reactor BuildingElevation 476 feet 6 inchesSoutheast Corner Room
F-2
The Unit 3 Fire Area RB3-II contains all of the Reactor Building fire zones not included in Fire Area RB3-I. It is separated from RB3-I as described in Subsection 2.2.3. This fire area is separated from Unit 2 Fire Area RB2-II by equivalent 3-hour rated fire barriers except for two places. These are: 1) the refuel floor which has no separations between Unit 2 and Unit 3, and 2) the torus basement which is separated by a rated wall except in the equipment drain tank room where the wall contains an unrated door. The wall separating Fire Area RB3-II and the Turbine Building is an equivalent 3-hour rated fire barrier (see Exemption Requests Section 4.2, F.P.R. Volume 4). Located within the fire area but still separated from it by equivalent 3-hour rated fire barriers are the drywell, Fire Zone 1.3.1 and Fire Area RB3-I. Fire Zone 1.3.1 is considered part of RB3-II but is enclosed in 3-hour barriers except that the west wall contains a ventilation louver and mechanical penetration open to the steam pipe chase, the ceiling contains an HVAC duct penetration that is protected by a sprinkler, and the floor contains open mechanical penetrations (see Exemption Requests Section 4.9, F.P.R. Volume 4). All of the access doors to the fire area are rated to three hours except as noted above.
The safe shutdown analysis for Fire Area RB3-II can be found in Section 4.5 of this report. A more detailed description of the fire zones which comprise this fire area is contained in the Fire Hazards Analysis Section 4.5 (F.P.R. Volume 1).
2.2.6 Fire Area - Unit 3 Primary Containment
The Unit 3 primary containment (Fire Zone 1.2.1) is separated from the rest of the Reactor Building by a 3-hour rated fire barrier. The primary containment is inerted, thus, a fire cannot start and a safe cold shutdown can be achieved and maintained using any of the shutdownmethods. A detailed description of this fire area is in Fire Hazards Analysis Section 4.6 (F.P.R. Volume 1).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-6
2.2.7 Fire Area RB-2/3
Fire Area RB-2/3 is composed of the following zones.
Fire Zone Description F-Drawing
9.0.C HPCI Pump BuildingElevation 504 feet 6 inches2/3 Diesel Generator Room
F-3
11.1.3 HPCI Pump BuildingElevation 476 feet 6 inchesUnit 3 HPCI Pump Room
F-2
11.2.3 HPCI Pump BuildingElevation 476 feet 6 inchesUnit 2 HPCI Pump Room
F-2
This fire area is separated from RB2-II and RB3-II by 3-hour rated barriers with rated seals and doors except for an HVAC penetration to the torus level of RB2-II (see Section 3.3 of the Exemption Requests, F.P.R. Volume 4).
The safe shutdown analysis for this fire zone is located in Section 4.7. A detailed description of the fire zones comprising this fire area is in Fire Hazards Analysis Section 4.7 (F.P.R. Volume 1).
2.2.8 Fire Area TB-I
Fire Area TB-I is composed of the following zones:
Fire Zone Description F-Drawing7.0.A Turbine Building
Elevation 549 feet 0 inchStation Battery Room
F-8
8.1 Turbine BuildingElevation 517 feet 6 inchesClean and Dirty Oil Tank Room
F-10
8.2.1.A Turbine BuildingElevation 469 feet 6 inchesBasement Floor
F-9
8.2.2.A Turbine BuildingElevation 495 feet 0 inchBasement Floor
F-9
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2.2-7
Fire Zone Description F-Drawing8.2.5.A Turbine Building
Elevation 517 feet 6 inchesGround Floor - Eastern/Southern Area
F-8, F-10
8.2.5.B Turbine BuildingElevation 517 feet 6 inchesGround Floor - Condenser Area
F-10
8.2.6.A Turbine BuildingElevations 534 feet 0 inchand 538 feet 0 inch Mezzanine Floor - Eastern Area
F-8, F-13
8.2.6.B Turbine BuildingElevations 534 feet 0 inch and 538 feet 0 inchMezzanine Floor - Condenser Area
F-13
8.2.7 Turbine Building Elevation 549 feet 0 inchMezzanine Floor
F-8
9.0.A Turbine BuildingElevation 517 feet 6 inchesUnit 2 Diesel Generator Room
F-10
This fire area is located on the eastern side of the Turbine Building. It borders the Unit 1 Turbine Building and Fire Area TB-V (control room and AEER) on the east. The wall separating TB-I from Unit 1 is unrated. The boundaries between TB-I and TB-V are 3-hour rated barriers. The walls separating TB-I and TB-II are nonrated substantial shield walls (see Section 5.2 of the Exemption Requests, F.P.R. Volume 4). TB-I borders TB-III only along portions of the Unit 3 cable tunnel. The tunnel is separated from this zone by a reinforced concrete barrier except for a locked closed manhole (see Section 5.2 of the Exemption Requests, F.P.R. Volume 4). The barrier between this fire area and TB-IV is not rated. However, TB-IV contains no safe shutdown equipment or cables. The wall between TB-I and RB2-II is an equivalent 3-hour rated barrier (see Section 3.3 of the Exemption Requests, F.P.R. Volume 4). Two of the fire zones which comprise Fire Area TB-I are enclosed by equivalent 3-hour rated barriers (Fire Zones 8.1 and 9.0.A). The walls forming the exterior are unrated except for the walls near the transformer which carry a 3-hour rating to an exterior exposure fire. The door in these walls is unrated.
The safe shutdown analysis is given in Section 4.8. A more detailed analysis of the fire zones comprising this fire area is contained in the Fire Hazards Analysis Section 4.8 (F.P.R. Volume 1).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-8
2.2.9 Fire Area TB-II
Fire Area TB-II is composed of the following zones:
Fire Zone Description F-Drawing
8.2.5.C Turbine BuildingElevation 517 feet 6 inchesGround Floor - Common Area
F-10, F-11
8.2.6.C Turbine BuildingElevation 534 feet 0 inchMezzanine Floor - Common Area
F-13, F-14
This fire area is located in the central area of the turbine and is separated from Fire Areas TB-I and TB-III by substantial shield walls which are not rated (see Section 5.2 of the Exemption Requests, F.P.R. Volume 4). The walls separating Reactor Building Fire Areas RB2-II and RB3-II from TB-II are equivalent 3-hour rated walls (see Sections 3.3 and 4.2 of the Exemption Requests, F.P.R. Volume 4). The floor separating this fire area from TB-IV is not rated. The wall adjoining the Radwaste Building is composed of substantial concrete or concrete block and is not rated.
The safe shutdown analysis for this fire area is in Section 4.9 of this report. A more detailed analysis of the fire zones comprising this fire area is in the Fire Hazards Analysis Section 4.9 (F.P.R. Volume 1).
2.2.10 Fire Area TB-III
Fire Area TB-III is composed of the following zones:
Fire Zone Description F-Drawing6.1 Turbine Building
Elevation 538 feet 0 inchDC Panel Room
F-14
7.0.B Turbine BuildingElevation 551 feet 0 inchStation Battery Room
F-14
8.2.1.B Turbine BuildingElevation 469 feet 6 inchesBasement Floor
F-9
8.2.2.B Turbine BuildingElevation 495 feet 0 inchBasement Floor
F-9
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2.2-9
Fire Zone Description F-Drawing8.2.4 Turbine Building
Elevation 502 feet 6 inchesUnit 3 Cable Tunnel
F-12
8.2.5.D Turbine BuildingElevation 517 feet 6 inchesGround Floor - Condenser Area
F-11
8.2.5.E Turbine BuildingElevation 517 feet 6 inchesGround Floor - Western/Southern Area
F-11
8.2.6.D Turbine BuildingElevations 534 feet 0 inch and 538 feet 0 inchMezzanine Floor - Condenser Area
F-14
8.2.6.E Turbine BuildingElevations 534 feet 0 inchand 538 feet 0 inch Mezzanine Floor-Western Area
F-14
9.0.B Turbine BuildingElevation 517 feet 6 inchesUnit 3 Diesel Generator Room
R-11
This fire area is located on the western side of the Turbine Building. The portion of TB-III, which is exposed to the exterior, is unrated except for walls in the northwest corner which are 3-hour rated from the exterior. TB-III borders TB-I only along portions of the Unit 3 cable tunnel. The tunnel is separated from TB-I by a reinforced concrete barrier except for one locked access manhole (see Section 5.2 of the Exemption Requests, F.P.R. Volume 4). The walls separating TB-III and TB-II are substantial unrated shield walls (see Section 5.2 of the Exemption Requests, F.P.R. Volume 4). The floor separating TB-III from TB-IV is unrated. The wall between TB-III and RB3-II is an equivalent 3-hour rated barrier (see Section 4.2 of the Exemption Requests, F.P.R. Volume 4). Contained within this fire area and separated by equivalent 3-hour barriers from it is Fire Zone 9.0.B.
The safe shutdown report is given in section 4.10. A more detailed analysis of the fire zones comprising this fire area is contained in the Fire Hazards Analysis Section 4.10 (F.P.R. Volume 1).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-10
2.2.11 Fire Area TB-IV
Fire Area TB-IV is composed of the following zones:
Fire Zone Description F-Drawing
8.2.8.A Turbine BuildingElevation 561 feet 6 inchesMain Operating Floor
F-8, F-16, F-17
8.2.8.B Turbine BuildingElevation 581 feet 4 inchesVent Floor
F-15
8.2.8.C Turbine BuildingElevation 601 feet 4 inchesVent Floor
F-15
8.2.8.D Turbine BuildingElevation 549 feet 0 inchNorth Turbine Room Vent Floor
F-22, F-23
14.2 Turbine BuildingElevations 549 feet 0 inch,571 feet 0 inch and 590 feet 0 inchUnit 2 Off-Gas Recovery Rooms
F-22
14.3 Turbine BuildingElevations 549 feet 0 inch,571 feet 0 inch and 590 feet 6 inchUnit 3 Off-Gas Recovery Room
F-23
This fire area contains the Turbine Building main operating floor, the vent floors, and the off-gas recovery rooms. This fire area is separated from the Unit 2 and Unit 3 Reactor Buildings by an equivalent 3-hour rated barrier on the south (see Sections 3.3 and 4.2 of the Exemption Requests, F.P.R. Volume 4). On the north, east, and top, this fire area is exposed to the exterior. The portion of this fire area which contacts the Radwaste Building is an unrated wall.
This fire area contains no safe shutdown equipment. A more detailed analysis of the fire zones comprising this fire area is contained in the Fire Hazard Analysis Section 4.11, (F.P.R. Volume 1).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
2.2-11
2.2.12 Fire Area TB-V
Fire Area TB-V is composed of the following zones:
Fire Zone Description F-Drawing
2.0 Turbine BuildingElevation 534 feet 0 inchMain Control Room
F-8
6.2 Turbine BuildingElevation 517 feet 6 inchesAuxiliary Electric Equipment
F-8
This fire area contains the control room and the auxiliary electric equipment room (AEER) and is located at the eastern end of the Unit 2 Turbine Building. This fire area is surrounded by 3-hour rated barriers. This fire area is open to the Unit 1 control room. The Unit 1 control room is also surrounded by a substantial unrated concrete wall. The exposed structural steel in the floor has been protected to a 3-hour rating. The control room and AEER are separated by a substantial noncombustible barrier.
The safe shutdown analysis for this fire area can be found in Section 4.12 of this report. A detailed analysis of the fire zones comprising this fire area is in the Fire Hazards Analysis Section 4.12 (F.P.R. Volume 1).
2.2.13 Crib House Fire Area
The Units 2 and 3 Crib House is physically separated from the rest of the Unit 2 and 3 structures. The Crib House is shown on F-18. The exterior of the building is constructed of reinforced concrete and unprotected metal siding which contains windows and vents and is therefore unrated. The basement of the Crib House is surrounded by reinforced concrete which is a missile barrier.
The safe shutdown analysis can be found in Section 4.13. A detailed description of the Crib House is in the Fire Hazards Analysis Section 4.13 (F.P.R. Volume 1).
2.2.14 Radwaste Building Fire Area
The Radwaste Building fire area is composed of the following zones:
Fire Zone Description F-Drawing14.1 Radwaste Building Area F-19, F-20, F-2114.5 Radwaste Solidification Building Area F-19, F-2014.6 Maximum Recycle Radwaste Building Area F-19, F-20
The Radwaste Building is designed to process and store Units 2 and 3 radioactive effluent. This
DRESDEN 2&3 AMENDMENT 18JUNE 2011
2.2-12
fire area is separated from the Unit 2 and Unit 3 Turbine Building by an unrated wall. The majority of the exterior walls carry no fire rating; a few though are rated for an exterior exposure fire.
There is no safe shutdown equipment or cabling located in the Radwaste Building. This building is designed so that radiological releases after a major fire are controlled.
A detailed analysis of the fire zones comprising this fire area is in the Fire Hazards Analysis Section 4.14 (F.P.R. Volume 1).
2.2.15 Miscellaneous Outside Structures
The following miscellaneous outside structures are found at Dresden.
Fire Zone Description F-Drawing14.4 Off-Gas Filter Building -
18.1.1 Unit 3 Main Power Transformer F-2518.2.1 Unit 3 Auxiliary Transformer F-2518.3.1 Unit 3 Reserve Auxiliary Transformer F-2518.1.2 Unit 2 Main Power Transformers F-2418.2.2 Unit 2 Auxiliary Transformer F-2418.3.2 Unit 2 Reserve Auxiliary Transformer F-2418.4 Auxiliary Boiler House F-25
- Unit 1 Plant Structures -18.6 U2 125VDC Alternate Battery Room -
18.7.1 Isolation Condenser Pumphouse – North Cubicle
F-353
18.7.2 Isolation Condenser Pumphouse – South Cubicle
F-353
Each of these structures is physically separated from the Unit 2 & 3 part of the plant except for the Unit 1 plant structures. The Unit 1 plant structures are separated from the Unit 1, 2 & 3 control room by a substantial unrated concrete wall. The exposed structural steel in the floor has been protected to a 3-hour rating. No rated barriers separate the Unit 2 & 3 Turbine Building from Unit 1. The Unit 1 structures can be considered Fire Area TB-I for safe shutdown analysis purposes. With the exception of the Isolation Condenser Pumphouse fire zones (18.7.1 & 18.7.2), no safe shutdown equipment or cables are located in these fire zones. A detail of the miscellaneous outside structures is found in Fire Hazards Analysis Section 4.15 (F.P.R. Volume 1).
0 l 1.1.2.E,
© 1.1.2.S.A 1SO-COND
Access froM Unit 3 up ladders __. froM 570 ft
9 © 1.1.2.4 1.1.2.5.B
8 © 1.1.2.3 t.1.2.5.C
~ © 8 9.0.C
l
DG 2/3 1.1 .2 .2
[X]
© 8 8 HPCI 11.2.1 1.1 .2.1
1\.2.3 LPCI
1.Heuvy lines identify fire areu boundries 2. Alphonuneric code in circle identifies hot shutdown po th.
AMENDMENT 12
--613'
(5 l.t.2.5.D
--589'
8
--570'
8 rx: lnstrunentotion
typical or four
545'6'
[X]
© SCP 1.3.2
8 11.2.c LPCi
517'6'
476'6' Bosenent
DRESDEN STATION Units 2 8. 3
FIGURE 2 .2-1
APPENDIX R SHUTDOVN PATHS FOR
DRESDEN UNIT 2 REACTOR BUILDING
l ® 1.1.t.6
0 1.1.\.5.A ISO-COND
Access f,-oM Unit 2 up ladders ---,. --frOM 570 f't
8 0 1.\.1.4
\.1.\.5.B
e ® \.1.1.S.C
1.1.1.3
~
0 8 9.0.C
1.1.\.2
2/3 DG
[XI
0 8 8 HPCI II.I.I t.J.1.1
11.1.3 LPCI
1.Heo.vy lines identif'y Fire o.reo. boundries
2. Alpho.nuneric code in circle identif'ies hot shutdown po th.
~
AMENDMENT 12
-613'
8 \.1.\.5.D
-589'
0
-570'
e [XI lnstr-ur-,ento. tion
Ctypicol or rou, )
8 0 SCP TIP 1.3.I 1.4.\
8 \\.\.2 LPCI_
-545'6·
- 517'6·
- 476'6· · Bo.senent
DRESDEN STATION Units 2 & 3
FIGURE 2.2-2
APPENDIX R SHUTDOVN PATHS FOR
DRESDEN UNIT 3 REACTOR BUILDING
L
Al
7.0.B
Al
6.1
Al
9 .0.B
AMENDMENT 12
Gv 8 .2.8 Turbine Operating Floor
~ c§3) 8.2.6.D and E 8 .2.6.C
~ E
8 .2.5.C
Unit 3 Cable Tunnel
~ .--~----549' 8 .2 .6 .A and B ~
--1 .... 2 .. ·011111iic,..R,.. .... _ 534'
~ 8.2.5.A ond B
8 .2.4
~ 6.2 AEER
----•-517'6'
'---------------------------::::::=t::::::::-----• -- 502'6'
l. Hea.vy lines identify fire area. boundries
2. AlphanuMeric cocle in circle identifies hot
shutdown path
Bl
9.0.A
DRESDEN STATION Units 2 & 3
FIGURE 2.2-3
APPENDIX R SHUTDOVN PATHS FOR
DRESDEN UNITS 2 &. 3 TURBINE BU[LDING
(
N.E. N.E.
2-1301-17 2-1301-20
VENT TO ATMOSPHERE
EMERG. AC
VENT TD MAIN STEAM
r
UNIT 3 SERVICE ___ _
l F.P.SYSTE~ V~TCR PUMPS SERVICE VATER PUMP 213-3901
SERVICE VATER PUMP 2B-3901
"'- ti'• I - I ~TRAINE"!--------------------'
SERVICE M•IJ-4399-7• TD UNIT 3
250Vclc:
SERVICE VATER PUMP 2A-3901
,,..
AMENDMENT 12
'--• '4----------------.------------~'4-----ISOLAT!ON CONDENSER
2-4399-7•,-------------'-----------,
250Vdc
ISOLATION CONDENSER MAKEUP PUMP 2/3-•3122A
2/38-3303 CONTAMINATED
CONDENSATE STORAGE TANI(
,2so.0O0 GALLON
DC M
2-1301-3
ISOLATION CONDENSER MAKEUP PUMP 2/3-43122B
2/JB-33O3 CONTAMINATED
CONDENSATE STORAGE TANI(
i?S0,000 GALLON
z:=::>'u 2}ro HPCI U3 PUMPS
hM~ '?.FtiW.fcftAL./I~K T-105B
2-1301-2
Mil
DRESDEN STATION UNITS 2 & 3
FIGURE 3.1-1
UNIT 2 ISOLATION CONDENSER
SYSTEM SKETCH CSHEET I OF' 2)
r
N.E. N.E.
3-1301-20
VENT TO ATMOSPHERE
EMERG. AC l!iQJ
3-1301-10
VENT TD MAIN STEAM
SERVICE
) t.P.SYSTE~ w'~TER PUMPS
~
SERVICE \IATER PUMP JB-3901
SERVICE IJATER PUMP 3B-3901
.,_.
AMENDMENT 12
2-4399-7• ~ 250Vdc TO UNTITIO~ CONDENSER ~ a !SOLA \~~ ;:=~=r======7 ~
3-4399-74,_.---------~----------,
250Vdc
ISOLATION CONDENSER MAKEUP PUMP 2/J-43l22A
2/38-3303 CONTAMINATED
CONDENSATE STORAGE TANK
:2so.ooo GALLON
!tm) DC
3-1301-3
ISOLAT!DN CONDENSER MAl<E:UP PUMP 2/3-43122B
2/3B-3303 CONT AMlNATED
CONDENSATE STORAGE TANK
250,000 GALLON
LJ.U 2}ro HPCI U3 PUMPS
LEAN DEMINERALIZED AiER SiORAGE TANK
T-105B
3-1301-2 Mg
DRESDEN STATION UNITS 2 L 3
rmuRE ::i.1-1
UNIT 3 ISOLATION CONDENSER
SYSTEM SKCTCH (SHE£'T 2 or 2)
2/3-4199-345
,----------- ------------, 1 CROSS CONNECTION I
I I I I
TD UNIT 113 I
' 3 • or~CC::s 1 I
2/3-3999r 213-3999-348 I I I I I I
1.349 L l H..,..._--1µr-., I
I I I I I I I I I I I I I I I I
'~ I :;, , ....
~ a.. a.. ::i
"' ~ u u p:a ....
,~ l l i---17 L.O. ,u e L,C,
L.O.
2-3999-348
2-3999-358
2-3999-359
I 2-38371 -8-500 I
CRD PUMP OIL CODL£RS
2-38371 -B-501 I
~
I I
UNIT M2 SY Dl!i:CHARGE
HEADER I CDDUNG IJATtR f'DR t..------ CRD PUMPS ___________ J
L.O.
CONDENSATE STORAGE
TANI<
CONDENSER HDTw'D.L
Turbine Building
Fire Main
MOZ-0301-2B
ROD DR!VE w'ATER PUMP 28-302-3
2/3-0301-16• L.0.
R,O.
2/3-0301-172 L.O.
CROSS TIE: TD UNlT 3
2/J-0301-163
2/3-0301-162
F'LD\J CONTROL STATION
CHARGING VATER LINE f.O.
CV2-0305;.126 (TYPICAL Of 177>
DRESDEN STATION UNITS 2 & 3
r'JGURE 3.1-2
AMENDMENT 22
TD REACTOR VIA ROD
llRJVE UNITS TYPICAL Dr 177>
UNIT 2 CONTRDL. ROD DRIVE SYSTEM SKETCH
~)
~----------r------------, I I
: CROSS CONNECTIDN TD UNIT 112 11
I CRD PUMP OIL catx.tRS I
I f 2/3-3999-3•8 I
I 2/3·3999 I
I r-349 I
I I-IIMl--+Lf"- I I
I
I I
I S\I SUPPLY I
I HEADER I
I I
I I
I I
I I
I I
I ~ I
I a. I
I !5 I
I I,') 1-...&.--..J--.,,,=---,,,,_ I I ::S 3-38371
I 8 -B-500 I
2/3-4199-345
LO.
CONDENSATE STORAGE
TANI<
CCND£NSER HDnl(LL
I l!I I
I 1-CRD PUMP
I Otl
I z COOLERS
I~ 3-3837 1
J t-I
1 ~ 1--L-..1 .__,,_-.,;;1;~=-;;;;i -B-501 I
I > I I u L.0, I
I~ I
I ,.. 3·3999-348 I
I I
1 I
I L,C, 3-3999-358 J
I I
I I
I I
I l-ml!-1a-+--I I
I I
I 3-3999-359 J
I OOT~ I
: S',J D[SCHARGt I I
H(ADtR I
I I
~-----------------------j
Turbine Building
Fire Main
DRIVE \JAT(R flLT£RS
MD3-030l-2B
ROD DRIVE \IATCR PUMP 31-302-3
2/3-D301-172 L.O.
R.D.
i?/3-0301-164 L.O.
CROSS m: TD ~IT 2
2/3-0301-163
A03-03D2-6A
CHARCilNCi \JATER LINE
CV2-0305~126 (TYPICAL or 177)
DRESDEN STATI•N UNITS 2 8. 3
fIGUR£ 3.1-2
AMENDMENT 22
UNIT 3 CONTflOL ROD DRJVE SYSTEM Sl<£TCH
<SMEt_T Z_)
<C .Ill I _,..,,.,
HYll!>VIQ JHl1 J1!lNIS JO QNV JV Nl'IClhllHS 10<
C-l'C Jl!fll~IJ
C 1 Z SllNn N0l1\'1S N30S3~Q
r
Zl lNJHONJiiY
,:nn
., .,, , . ...,..., ~ ....... , ...... liCI c1J.'1% iOh
·~~-<; U IICI Wt 110 l•lnJl"lill l• .. nNWJIIAC,11 '!a-. 1aru .._._ 111'11 ll,CJ:al fl.'4JBa
J'C"7nt-a. ...
~-~-.. ~<y~J..,.¾-y~l~'r~ b r r -<, ..:c6 U All U. , ... ::<}:<f-6 -...·UII »AUl..:Ci..:;.(~ 11·•11 D»l•U n .. ,
,:nn I ,. I l •• ( ~( I I ,.__ ____ ___. I
I min I
I I I I , _____ -_____ __J
a.la: -J•~=~ AIK t ~ ·.a-ti• ,~f-:a: a.•""'"'MUE C -.0 •u'fl "'"
--
•SDI/ SuPP\. • rROM MCC P9-2
688JD
2•151 2<150
1251/ DC IATT[Rf 12
6729' 67l95 67296
~
UNIT 2+UNIT 3
•eav SLPI'\. • rRO< uov sl.f'f'I. • rRO< • BDV SuPPL • rROH HCC JB-2
HCC ze- 2 I MCC J9-2
22281
2•156 2'155
I I
I I
J2~
77592
125V DC 77001
IATT[RY IJ
77596 77D0J 77'97
AMENDMENT
UNIT 2 I UNIT 3 411GV SI.J'PI. f 410V SUPPi. • •DOV SUPPL f
rRO< HCC 28-2 rR•M MCC 29•2 rRCM MCC 39·2
mvoc ~i~ mvoc IATT[Rf 12 !Al![Rf 13
~
12
•8DV SlPPI. Y rROM MCC 38-2
'7289 77387 7'169
67291 I 77386 "~'1 i '"" I 312-2D 372-19
IPSY IE ,men ~ I()
.. l I Jr ~,. .. , 7290 7738, I 67292 7738'
67293 7&171 "" -~ + "'" w ., ''.'.'.J
2<196 24197
67'•5 67~• 7
n IP,V nc MAIN air lfA•I
6)NC
6) N0 *) NC
f ._,.,.,
1r,v DC IAUCIT IUf II fl/V, D I 0 ,,c .. ., .. ,..,,,
I «n DIV I ' IOf-Cfn
~ J72• 2I
NC
.2.
I ~:ffl "~~~~=m IPlt!Ul_y.__1111
I
I I I I I l
fiJ 11'V DC
I ,cv .,,,..
) l,C
I ~ .. r-=-i-:r------1~--f:i
)hC u) NO t ,, ICSl. IUI ,. .. , cnt IIV fl) i )~b1lrf~;c 1nv m: u •CV IVC'A f•
Ill.--~ l?,V DC D1tr. ,.,.,__ •f Cll tV.11
,~fl 1 I I
)NC ;::) NC I I 23980 _ 1 l
IP'5V DC ., • l(V
S\ilfA r,..1_y___
I l 1 1P'5V D:' Af oll'V l\ltil1I' P4•1
IP1Y IIC AT • .,,, l'\ICA Pt
tP,v -~_!!_111.V I~ ,1
,~ ., ~ i
I
I I
I I
I
Af UY
~ I I 1 inv IE•• •rtV IVCA )4
I I
l 1 33980 1nv DC •t UV -~-~~,
1!'5Y a: AT 4WN I~ 31
IP1V DC At_ 4rY n,,:'a >t•t
I IPSY DC AT •tw tvta >t
125V DC SHUTDOVN SYSTCH
l
I I 1
1
r- ~g-\,m m~;,... p-'\,--, N NO
~~~ ~~~
J<196 ]4197
Ill IIU ..... ,..., IIC ,u ., I <en. DIV, Ill
I I I
(102
I I 1 IL a.or.
) ,..., DC.
J.:__te:1:~
IP'I ~-·" !4179 2080 2'181 2•102
IL ..... I ,...,DC. !: .. !!~ .. CIU
2•090 mn l •091 2,091 e4oe, e404JO e40,2
IL a.or. ,..., DC.
]4081
3:88~ ]4092 ]• 080 ]4082 ]4089 34091
tee •nun
J!I~ 34181 J418l
1i.1. kDC.. r,o Y DC RC:C U ctss. IIY. U, f [01 r' Dill
1,L a.or. , ,..., DC. o,
!:_!!'1111 2 I.Pl ...._ toJ•U
:?SOV DC SHUTDOVN SYSTCH
LCGCND
- rtcD SCGH[NTS APPLICAILC ID HOT s,rc Sl(!Tllll\lN PATHS
- - AL T[INA!t rctD SlVICCS NO! APP\.ICAILC 10 HO! S.,-t Sl(l!DQ\IN PATHS
- • - IOl.WDAR, LlhC JtTVt[N TVO IJ'rflTS
DRESDEN ST A iION Units 2 &. 3
F"IGURE 3.1-3
CSHEE T c! OF" c!)
HOT SHUTDOVN AC AND DC SINGLE LINE DIAGRAMS
r
HOTVELL
DRAIN PUMP
2-2301-6
AIR EXHAUST rAIII
2-2301 -14
_...
SUPPRESSION TO SBGT SYSTEM I .. POOL
(TEST LIND
2-2301-57 AUX COOLING VATER PUMP
2-2301 -10
FROM FEED VATER HEATERS
2-2301 2-2301 -9 -8
-35 2-2301-36
.....
AMENDME1'T 12
DRESDEN STATION UNITS 2 &. 3
r!GURE 3.1-4
UNIT 2 HIGH PRESSURE COOLANT INJECTION
(SH((T I or 2)
r
a! w t/1 z w 0 z • u
HOT\JELL
CONDENSATE STORAGE TANK 2/3 B-3303
r.JR CXHr.UST rAN
TO SBGT SYSTEM
3-2301-57 AUX COOLING \JATER PUMP
3-2301 -14
,-
SUPPRESSION
I 111 .. POOL CTEST LINO
FROM FEED \JATER HEATERS
3-2301 3-2301 -9 -8
3-2301 -10
3-2301-36
~
AMENDMENT 12
DRESDEN STATION UNITS 2 8. 3
rJGURE :1.1-•
UNIT 3 HIGH PRESSURE
COOLANT INJECTION
(SHEET 2_or 2)
( ,... ,-
AMENDMENT 12
,. w "' " w :t
• .J Q. Q. ::,
"' "' w 15 • u :,: 0
!? u Q. .J .... u (1.
r 8
rROM CRIB HOUSE F"ROM CRIB HOUSE
11;.-v,w-u-.iiuu
_____ ;.._
2·5700•30B
CCS\J PUMP COOttll CCSV PUMP C•• L(II
CCS\J PUMP Si~~o\'~~~
2c-1s01- ••
2·1501-18B 2-1501-19B 2·1501-19A 2·1501-IBA
~ ~ ~ ~ I I ~ ~ ~ I I · ~
H• 2·1501
•20A
2•1501-328
~ \:AHB[R·; \ CHAHBC~ ~
2-l501•3i!A
HO] I Ri
2·15 ./ I '-- 2 1501-!JA
Mnl I I I Lf'i:d&EiNT ( (=7]j LW'i!J8[,.NT j I I IMO
..:J INJCCT ION PUMP INJCCT l•N PUMP t;_:,
2• 1501-118 MO
2•1501•11A
2- 1501 - 5 i!-)SOl-SB
2B-1503 2D-1502 -+-.C,,.::}--.J ~ l!A-1502 I I I I !A-1,0]
CONlAJNHCNT LP COOLANT
LP CO•L,-NT CON1•1NNC•T
CODLING INJ(Cll•N PUMP
IN.JCCfTON PUMP Clll.lHCi
HCA! t----------~ M[AT
(XCHANG(II E=::=!!=!!=9 • ----~------le===~ tXCHAl<!',U
2-1501•3B 2·1501-5A
~ -- TO C\J DISCH. HDR. TO C\J DISCH. HDII.
DRESDEN STATION UNITS 2 & 3
FIGURE 3.1-5
UNIT 2 LPCI-TOIIUS CODLING HODC
CSHCCT I or 2)
"' IJ 0 C
!f • i ~ .. "' w .J 0 0 u
g "' u .. ~ u !l: g A
r
~ i ,. o! ~ Ol w a 0 u :I: • 0
"' u ll.
~ u ll. r
E
38-1503 CONT A!NMENT
~e~l!NG EXCHANCCR
3-1501-188
MO
3-1501-328
MO
3-1501-:JD MO
f"ROM CRIB HOUSE
3-1501-198
MO
3-1501 -208
HO --'
3-1501-139
ui1c;:-dae~NT INJCC~ ION PUHP
Li0clr°CANT
INJECT l~N PUMP
TO C\I DISCH. HOR.
,..
3•1501-5A
f"ROM CRIB HOUSE
ll•ISOl LP C[D.AHI
IHJCCllON P\MP
:IA•J,0! LP CO'.J..ANT
IN.l:CflOH PUP
3-1501-19A MO
HD '---
3-1501-!JA
3-1501-18A --, HD
3-l50l-32A
iio
HO '--
3-1501-IIA
~
AMENDMENT 12
~ .. 'i!
i .. Ol
a ~ ~ ~
~ E
JA-1503 E~TAJNM(NT H ~llNG
----~-----7======d E CHANGER
3-1501-lA
HD
10 C\I DISCH. HOR. DRESDEN STATION
UNITS 2 L 3
f"IGURE 3.1-5
UIIIT 3 LPCI-TDRUS CODLING MDDC
!SH((T_ ·2 Ill" 2)
r
fR•M
DIESEL ruEL • IL STORAGE: TANK 2-5201 CIS,000 GAU
DIESEL OIL TRANStER PUHP 2-5203
750 GAL DIESEL • IL DAY TANK 2-5202
ruEL OIL RETURN
DIESEL ENGINE 2-5210
~
,ROH TURBINE BUILDING VENT
PRIMARY AIR COMPRESSOR L RECEIVER 2-520'.l
DIESEL START UP AIR
GENERATOR
VE:NTILA TING ,AN 2-5790 <60,000C,H)
7 I I I I I I I
_____ J
COOLING DIESEL IJATER EXHAUST TO STAND PIPE
] I lt4
~
AMENDMENT 12
~~~~Rs~i~ICE~ 2/J-J'.lJJ-500
DI "" I • 4 '
vHf/i ,;l',\i;'"° [II~ i•m ,:fil',Ji'v mmt
Z·J90JB UMPS '''' e,,e INTAKE •LUME ------+--
IN CRIB HOUSE
,ROH 2C/c'D CCSIJ PUMPS
HPCI 11 LPCI 11 LPCI
~gg~ER ~gg~ER ~gg~ER I I DRESDEN ST AT ION 2-51•1 2-5746A 2-57469 Units 2 g. 3
F"IGURE 3.1-6
HEADER UNIT 2 DIESEL GENERATOR DISCHARGE I (SHEET l or 3)
FROM INTAKE f"LUME IN CRIB HOUSE
DIESEL ruEL OIL STORAGE TANK 3-5201 (15,000 GAU
DIESEL OIL TRANSrER PUMP 3-5203
750 GAL DIESEL OIL DAY TANK 3-5202
ruEL OIL RETURN
DIESEL ENGINE 3-5210
,.,-.
rROM TURBINE BUil DING VENT
PRIMARY AIR COMPRESSOR L RECEIVER 3-5209
DIESEL START UP AIR
GENERATOR
VENTILATING rAN 3-5790 (60,000CrM)
7 I
I I I I I
I
_____ J
COOLING 'JATER
DIESEL EXHAUST
TO STAND PIPE
AMENDMENT 12
f------'------+---.---...,...----------,..----IM~--- tROM 2/3 DIESEL CODLING 'JATER PUMP
2/3-3933-501
DIESEL COOLING VATER PUMP 3-39038
rROM SERVICE VATER HEADER
rROM 3A/3B CCSV PUMPS
rROM 3C/30 CCSV PUMPS
HPCI 11 LPCI 11 LPCI ROOM ROOM ROOM
COOLER COOLER COOLER
3-5747 3-5746A 3-574681 I DRESDEN Units 2 B. 3
FIGURE 3.1-6
~
STATION
DISCHARGE
I UNIT 3 DIESEL GENERATOR HEADER
(SHEET 2 or 3)
r
f"R•M INTAKE rLUME IN CR! B HOUSE
DIESEL ruEL OIL STORAGE TANK e/3-5201
,,,.
--. -- -- -- -- -- -- -- --
DIESEL OIL TRANSrER PUMP 213-5203
750 GAL DIESEL OIL DAY TANK 213-5202
ruEL OIL RETURN
DIESEL ENGINE 2/3-5210
PRIMARY AIR COMPRESSOR L RECEIVER 2/3-5209
DIESEL START UP AIR
GENERATOR
VENTILATING rAN 2/3-5790
7 I I I I I I I
_____ J
DIESEL COOLING \/ATER PUMP 2/3-39038
CODLING DIESEL ~ATER EXHAUST TD ST AND PIP(
TD UNIT 3 TD UNIT 2
HPC!/LPC! ROOM HPC!/LPCI ROOM C•• L(R SUPPLY H(ADER COOLER SUPPLY HEADER
,-
AMENDMENT 12
DRESDEN STATION Units 2 8. 3
r!GURE 3.1-6
UNIT 2/3 DIESEL GENERATOR
(SHEET 3 OF 3)
r
2-l00l-4A
2-1001-4B
o.c.
2- 100!-4C
DRYVELL
2A-I002 SHUTDO\JN PUMP
rcv-2-1001-37ACL•>
28-1002 SHUT DD\JN PUMP
2C-1003 SHUTDO'JN HEAT EXCHANGER 2C-l002
SHUTDO'JN PUMP
rev 2-1001-31c2 CLO)
-4A
~
2-100!-IA
DRY'JELL
2-1001-lB
REACTOR RECIRCULATING PUMP2A-202
'2-0202-SA
REACTOR 2-201
2-1001-5B
~
AMENDMENT 12
DRESDEN STATION UNITS 2 L 3
r!GURE 3.2-1
UNIT 2 SHUTDOVN COOLlNG
(SHECT I or 2)
r
3-JOOJ-4A
3-1001-4B
D.C. MO
3-IOOJ-4C
DRY\JELL
JA-1002 SHUTOO\JN PUMP
rcv-3-!00!-37A<LD>
3B-1003 SHUTOO\JN HEAT EXCHANGER
39-1002 SHUTOO\JN PUMP
JC-1002 SHUTDO\JN PUMP
rev -J-1001-J1c <LO>
,..
D.C.
3-1001-!A
DRY\JELL
3- 1001-1B REACTOR
3-201
3-1001-5B
,,,,.
AMENDMENT 12
DRESDEN STATl•N UNITS Z L 3
f!GURE 3.Z-l
UNIT 3 SHUTDC\JN COOLING
(SHEET 2 or 2)
(
2A-1002
D BEARING COOLER
DRY\,/ELL
DRY\,/ELL
TO DRY\,/ELL LOADS
SHUT 00\,/N COOLING PUMPS
2B-1002
D
2-3702
2c-1002
D BEARING COOLER
2-3701
r ,-..
AMENDMENT 12
SHUTOO\,/N COOLING HEAT EXCHANGERS
§1[ 2:1_
COOLING IJATER EXPANSION TANK
2-:'U03_
COOLING \,/ATER PUMP 2A-3701
DRESDEN STATION UNITS 2 &. 3
FIGURE 3.2-2
UNIT 2 RBCC\I SYSTEM
CSHEET I Of" 2)
r
3A-1002
0 BEARING COOLER
DRY'w'ELL
DRYIJELL
TO DRYIJELL LOADS
SHUT DOIJN COOLING PUMPS
3B-1002
0 3C-1002
0 BEARING COOLER
~ ~
AMENDMENT 12
SHUTDOIJN COOLING HEAT tXCHANGERS
~ 3:i
TO OTHO HCAT CXCHANG(~S
rROM UNIT 2
COOLING \JATER EXPANSION TANK
3-3703
COOLING \JATER PUMP 3B-370l
CODLING w'ATER HEAT EXCHANGERS
JA-3702
JB-3702
DRESDEN STATION UNITS 2 L 3
r!GURE 3.2-2
UNIT 3 RBCCw' SYSTEM
(SHEET 2 or 2)
r
/
L.P. SERVICE \JATER PUMP
3-A-3901
, .. i/~/
SERVICE \JATER STRAINER
REACTOR BLDG. COOLING \JATER HEAT EXCHANGER (TYPICAL)
2A-3702
! ru u , I V
q >o u. u (7\
I- M
L.P. SERVICE \JATER PUMP
3-B-3901
----/~/ ~
/
SERVICE \JATER STRAINER
r
SERVICE IJATER PUMP
2/3-3901
SERVICE IJATER PUMP
2-B-3901
---l/~/
SERVICE \JATER STRAINER
GROUND FLOOR
! ru ~ , I V
o >o i..: u (7\
I- M
2B-3702 2/3-3702
! ru cc , I V
q >o u. u Cl'
I- M
3A-3702
! M ~ • I V
q > 0 u. u Cl'
I- M
SERVICE \JATER PUMP
2-A-3901
,,... ,MENDMENT 12
GROUND FLOOR
3B-3702
! M IXl I v >o u (7\ I- M
DRESDEN STATION Units 2 8. 3
F"IGURE 3.2-3
SERVICE \JATER SYSTEM
I
l
l
!.! ________ !·
! ---r-0; :, I •·
: .
-------
I --:~ •: i_. l
__ .,.
.. T _, _J '
,_j f
~ i~! ~ ' - ---.· •\'.l
; l .. . ,
'' - ' -•ii,)
r I ... •
·t!
~!:::·:~~~:: ~/ "ff''llli' j!
J;Ji
!! tHtJiflt_~~l~~ti!
· ! ~• ~•••'!U~!I!
. 'lll"'lll!IH(l
z 0 t=n < I- od Cl)N
z .. l,J ..
Oc en :,
"' a: 0
u 0 :,: O<
.,. :,: C: -;::; """' . <
"' u- ... cco 0
M z:w .., :x::
0:: o- .... :::, o .... .., "' .... .., ;:;: :::,w ;;; :c-'
"'"' o:'.: _,.,, 0 u
,.. ,-._ ~
•eov SUl'PLY r•OH MCC 29-2
UNIT 2 + UNIT 3
ceov SLPPLY n:tOM 48DV SuPPL "t rRO'f 480V SlflPLY rROH MCC 38-2
6893D
2'"' 2<15D
HCC 28-2 I MCC 39-2
125V DC BATTtOY 12
6729< 67295 67296
22281
2<156 2<155
IP5V IC .. TT[" an It CDIV, IJ
)372-D<
I 32~ I
I I "~'1 77592
I 312-19
I Q NC
I
770D1 12511 DC BATT[RY 13
1 '"" 775'6 7700] 77597
372-20
,.,v..,tAntn ~ MO M ll UIIY U 0
AMENDMENT 12
UNIT C! I UNIT 3 <BOV SUPPi. y •8DV SU'P\. y •8DV SLPPLY
r1111< HCC ee-2 rROH HCC 29-2 rAOH HCC 39-2 I
250V DC ~ 1-! 250V DC BATT[AY 12 IATT[AY 13
76171 76172 A02
-hJ'-o:~..P-'\ NC )AQI
'728~ 67289
I 67290 67291 I 67292 67293
~:_,.3/" ·+' I
,aav SUPP\.T rR04 HCC 38-2
''.:]
7617D 76169
ti 1nv DC ""'" kn l!A•I t: NC ttn a,v I ' lrOf•UII CCU DIV I & frOf·CISI
~ 372-21
L '"'L a.ar. ...., oc ""c u I ccn. 11v. 111 I
2<196 2<197
67545 675• 7
6)NC 0) !,(] *) NC
f +-""'
~ NO ~NC ~NC
1)~2-D3 'S)-:1:2-01
3237'
3237,
I I I I l
f; IP,Y DC "° ,,U l(V
',wr.r
ll'SV DC Af
.fCV JVGII f •
13::~o"' ltL m-13 I NO NC
£tn1- 11v.m9 ,. l(l M Ill '
b, NO ~ NC I
.. r=rf :ri;: 1. 1\1 ,, ,~ it ~ n
I\J
)NC
I l I I
I
,·rr~- I I 23980 l j ~y IC T 41t:Y
I I
I ' 1 1
~
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DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-1
3.0 METHODOLOGY AND SELECTION OF APPENDIX R SAFE SHUTDOWN FUNCTIONS, SYSTEMS, AND COMPONENTS AND THEIR ASSOCIATED CIRCUITS
3.1 Description of Methods and Paths to Achieve and Maintain Hot Shutdown
Two primary systems have been selected as the minimum set of systems which can achieve hot shutdown regardless of the location of the fire and concurrent with a loss of offsite power. These two systems are:
1. The isolation condenser system, and
2. The high pressure coolant injection (HPCI) system.
These systems are those which normally would be initiated in the event of a loss of offsite ac power.
Subsection 3.1.1 contains descriptions of the operation of the isolation condenser and HPCI hot shutdown methods and details how the required hot shutdown functions are accomplished.
Five different (though not unrelated) Appendix R hot shutdown paths per unit were identified at the Dresden Station. Four of the paths per unit utilize the respective unit's isolation condenser. These differ only in that they employ different power trains, diesel generators, CRD pumps, and/or operating methods. The fifth path per unit is the HPCI/LPCI method of shutdown. Table 3.1-2 outlines the differences between the Appendix R hot shutdown paths. Detailed descriptions of the shutdown paths are provided in Subsection 3.1.2.
3.1.1 Hot Shutdown Methods
3.1.1.1 Isolation Condenser Method
The isolation condenser method for achieving and maintaining hot shutdown is used in nearly all of the fire zones at Dresden 2 and 3. Figure 3.1-1 shows system arrangement. This method was chosen because it relies on a minimum of power-operated equipment. In addition, it is the normal emergency method initiated upon a loss of offsite power event. The isolation condenser can be operated locally by manual actions or automatically from the control room. For fire areas involving a large number of isolation condenser circuits, solutions were determined that minimize the use of electric power in the affected unit. Differences between the eight alternate shutdown paths using the isolation condenser are described in Table 3.1-2.
3.1.1.1.1 Reactivity Control
Credit is assumed for reactor trip and verification of control rod insertion in the control room even for a postulated event that requires evacuation of the control room. This rapid action would be initiated prior to evacuation, should it be necessary. Any fire directly affecting the Reactor Protection System (RPS) or Control Rod Drive (CRD) control and fail safe circuitry will cause a
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-2
reactor trip even if not manually initiated from the control room. No attempt is made to ensure the availability of neutron monitoring instrumentation since control rod insertion is sufficient to ensure subcriticality (boration is not required). Upon loss of power the control rods are designed to be driven in automatically, and, in case of fire damage to the logic circuitry, the system is designed to fail in the safe position (control rods fully inserted).
3.1.1.1.2 Reactor Coolant Makeup
Since the isolation condenser is a closed cooling system for the reactor, large amounts of makeup water to the reactor vessel are not needed. The isolation condenser method of hot shutdown utilizes the Control Rod Drive (CRD) Hydraulic System to provide makeup to the reactor (see Figure 3.1-2). One of the two control rod drive pumps per unit will provide all reactor make up due to leakage and shrinkage during cooldown (see Subsection 7.2.1.2). Each CRD pump takes a suction from the condensate storage tank and the condenser hotwell and pumps water through a piping system consisting of two manual valves and one motor operated valve until reaching the CRD flow control station. At this point, the flow path branches into two parallel paths, each containing an air-operated flow control valve (AO-302-6A&B). These two valves fail closed on loss of instrument air (instrument air is lost with loss of offsite power). This prevents cooling and drive water flow from reaching the CRD hydraulic units by this method. However, the charging water line branches off of the main CRD line upstream of the flow control station. Flow through this line is unaffected. This charging line, which normally charges the scram accumulator water tank, provides a flow path to the control rod drives (and, through leakage through the drive, to the reactor) when the inlet scram valve (CV-305-126) opens. This valve and the outlet scram valves (CV-305-127) open on any scram. These valves fail open upon loss of instrument air.
The flow path from the charging line to the reactor would be defeated if the scram was reset, i.e., the inlet and outlet scram valves were closed. However, the reset can only be accomplished with instrument air available to close those valves. If instrument air is available, then the cooling water flow path to the reactor (via the control rod drives) is available because the air-operated flow control valves will be opened.
The control rod drive pump’s discharge pressure can be monitored locally on mechanical indicators PI2(3)-302-73A and PI2(3)-302-73B.
Local control pushbutton stations have been installed for the control rod drive pumps. The control rod drive water headers for the two units are connected with a crosstie line (as shown on Figure 3.1-2) which is normally isolated by manual valves. The valves are located on the mezzanine level of the Turbine Building in an area with accessibility to either set of pumps. (See Subsection 6.2.3.2.) Therefore, a fire in one unit will not prevent the other unit's pump from supplying makeup water to the affected unit.
The control rod drive pumps can be cooled by either service water or fire water (see Subsection 3.1.1.1.6) if normal cooling from the TBCCW system is lost.
DRESDEN 2&3 AMENDMENT 14JUNE 2003
3.1-3
3.1.1.1.3 Reactor Pressure Control and Decay Heat Removal
Initial pressure control and decay heat removal for the reactor is normally supplied by the electromatic relief valves. However, the target rock valve (mechanical mode) and mechanical safety valves on the steam lines will provide these functions if operation of the relief valves has been affected by a fire.
The long-term (up to 72 hours) reactor pressure control and decay heat removal system is the isolation condenser system. The isolation condenser is sized to handle the total decay heat load 8.8 minutes after scram.
The isolation condenser consists of two tube bundles in a large water-filled shell. The reactor steam flows through the tubes, is condensed, and returns to the reactor vessel.
The water in the shell is boiled off and vented to the atmosphere. The vent line to the main stream line is isolated upon initiation of the condenser. When reactor pressure rises to or above 1,070 psig for at least 15 seconds, automatic initiation of the isolation condenser is achieved by opening normally closed valve MO2(3)-1301-3.
If a fire has affected automatic operation of the accessible isolation condenser valves MO2(3)-1301-2 and MO2(3)-1301-3 (Valve MO2(3)-1301-2 is normally open), the operators will remove power from the appropriate motor control centers so that the valves may then be opened by use ofhandwheels. Normally open valves MO2(3)-1301-1 and MO2(3)-1301-4 are located in the drywell, and are, therefore, not accessible for manual operation. In the event a fire causes these valves to spuriously close, a new alternate 480-V power feed to each of these valves is provided along with a local control station, also isolation switches have been installed for the normal control and power cables. (See Subsections 6.2.1.4 and 6.2.2.4.) If the valves spuriously close, the alternate feed will be energized and the valves opened. The operator will then deenergize the valves in the open position. Valve MO2(3)-1301-3 will be manually throttled to control the cooldown.
Valves AO2(3)-1301-17 and AO2(3)-1301-20 fail in the closed position which isolates theisolation condenser steam line vent as required. The most likely effect of a fire in the controls to these valves is the failure of the valves in the desired position. However, even if this does not occur, the operator can isolate the line by closing manual valve 2(3)-1301-16 located near the isolation condenser. Therefore, power is not required to initiate the isolation condenser unless a fire spuriously closes the inboard valves. In this case, the alternate power feed will be used to reopen the valves.
Normally, makeup to the isolation condenser will be supplied from the clean demineralized water storage tank via two 1,350 gpm diesel driven isolation condenser makeup water pumps (the preferred source). To initiate flow, the Control Room operator will start one of the diesel driven makeup pumps, and recirc flow back to the clean demineralized water storage tank. The operator then admits cooling water to the isolation condenser by opening normally closed valve MO2(3)-4399-74. MO2(3)-4399-74 is a DC powered valve.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-4
With no makeup, the water stored above the isolation condenser tubes is depleted in 20 minutes after initiation of the condenser. The isolation condenser level is normally monitored in the control room on level indicator LI2(3)-1340-2. The operator can locally monitor the level in the isolation condenser on an existing sight glass by opening four manual valves. As shown on Figure 3.1-1, either of the two isolation condenser makeup pumps can supply makeup water to either unit's isolation condenser through the normally open tie line. Therefore, a fire in one unit will not prevent the other unit's pump from supplying makeup water.
To initiate makeup flow, the operator will start one of the diesel driven makeup pumps and open valve MO2(3)-4399-74. This valve is located near the isolation condenser and is accessible for manual operation if necessary. Each isolation condenser makeup pump is capable of supplying 1350 gpm (less approximately 400 gpm for pump min. flow) at a discharge head of 240 ft. A flow rate of 350 gpm is sufficient to balance the boil off due to the removal of decay heat 35 minutes after scram. Therefore, one isolation condenser makeup pump is sufficient to provide the makeup requirements of both units (but not simultaneously). Isolation condenser makeup pump discharge pressure is read in the isolation condenser makeup pump A & B rooms respectively (Fire Zones 18.7.1 and 18.7.2) on pressure indicator PI 2/3-4341-150A and 2/3-4341-150B. Station procedures assure that adequate makeup water for both the isolation condenser shell side and the RPV is available. Clean demineralized water storage level is normally monitored in the MCR or MUDs control room with local, alternative monitoring at the tank’s drain valve using the dedicated pressure gauge from the SSD Cart.
Should it become apparent that long-term operation (up to 72 hours) of the isolation condenser is necessary, the operator will establish makeup to the isolation condenser from the service water system. Any one of the five service water pumps can supply makeup water to either unit's isolation condenser through the common fire water supply header. Therefore, a fire in either unit will not prevent the other unit's pump from supplying makeup water. In the event that the service water system cannot maintain flow to the isolation condenser, the two fire pumps (Unit 2/3 Fire Pump, 2/3 4102 and Unit 1 Fire Pump, K124) will automatically start.
To establish makeup flow, the operator will open valves MO2(3)-1301-10 and MO2(3)- 4102 from the fire header. Due to the length of time involved (at least two hours) before service water is necessary, the fire is assumed to be out and any suppression systems that may have activated are manually isolated from the main header. Service water header pressure is normally monitored in the control room on pressure indicator PI2/3-3904-4. The service water pump discharge pressure can be monitored on local mechanical instruments PI2/3-3941-29, PI2-3941-8A, PI2-3941-8B, PI2/3-3941-8C, PI3-3941-8A and PI3-3941-8B. The operator can locally monitor the pressure in the fire header on mechanical indicator PI2/3-4141-4A located in the Crib House.
The isolation condenser makeup pumps can be operated locally from Panels 2223-126A and 2223-126B located in Fire Zones 18.7.1 and 18.7.2. Also, local control capability has been provided for the service water pumps (see Subsections 6.2.1.2 and 6.2.2.2).
3.1.1.1.4 Suppression Pool Cooling
Because the suppression pool is not used as a heat sink except for the first few minutes, suppression pool cooling is not a necessary hot shutdown function when the isolation condenseris utilized. The isolation condenser is designed to handle the total heat load 8.8 minutes after
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-5
scram; at this time steam release to the suppression pool will cease, if the isolation condenser has been initiated. The isolation condenser must be initiated within a maximum of 30 minutes after scram (see Subsection 7.2.1.2). The pool temperature will remain under 120ºF if discharge to the pool is terminated within 30 minutes after scram. (See G.E. Task Report T-0611, F.P.P.D.P. Volume 13.)
3.1.1.1.5 Process Monitoring Instrumentation
Reactor Water Level and Pressure
Reactor level and pressure are normally monitored in the control room on various instruments which are fed from two independent divisions. The operator can also locally monitor reactor level and pressure in the Reactor Building on instrument racks 2202(3)-5 and 2202(3)-6 on the 545-foot elevation or 2202(3)-7 and 2202(3)-8 at the 517-foot elevation. Reactor temperature can be determined from saturation tables that are included with the safe shutdown procedure.
Suppression Pool Level and Temperature
Suppression pool level and temperature are not necessary for the isolation condenser method of hot shutdown (see Subsection 3.1.1.1.4).
Isolation Condenser Level
Isolation condenser level can be monitored in the control room or at the isolation condenser on a sight glass (see Subsections 3.1.1.1.3 and 6.2.1.1).
Diagnostic Instrumentation for Shutdown Systems
Discharge pressure indication is provided for the CRD pumps, isolation condenser makeup, and service water pumps (see Subsections 3.1.1.1.2, 3.1.1.1.3, and 3.1.1.1.6).
Level Indicator for Tanks
The condensate storage tank level is normally monitored in the control room or the operator can locally monitor Tank Level. Level indication is determined locally via a pressure gauge for the clean demineralized water storage tank (see Subsection 3.1.1.1.3).
3.1.1.1.6 Support
Power for the isolation condenser shutdown method is provided by one of the emergency diesel generators. The ac and dc power supplies to the hot shutdown equipment are shown on Figure 3.1-3. The diesel will normally start automatically upon a loss of offsite power. In case a fire affects the automatic operation or the control room manual operation of the diesel generators, the 2/3 diesel generator can be isolated from the control room and started locally by the operators (see Subsection 6.2.3.1.2). For the case when the isolation condenser is operated manually, the 2/3 diesel generator will supply the necessary power to the unaffected unit and mechanical crossties will be utilized for shutdown as previously discussed. Table 3.1-1 demonstrates that one diesel generator is capable of supplying the loads necessary to shut down both units
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-6
simultaneously. The dedicated diesel generator (2 or 3) is necessary only when the fire directly affects the 2/3 diesel generator; for instance, a fire in the 2/3 diesel generator room or at the 2/3 diesel generator cooling water pump in the Crib House. In each of these cases, the dedicated diesel generator can supply all necessary loads.
Each diesel generator is supported by the following auxiliaries (see Figure 3.1-6, Sheets 1, 2, and 3):
1 - diesel generator fuel transfer pump2 - diesel generator room ventilation fan3 - diesel generator cooling water pump
Each diesel generator is supplied from a 750-gallon day tank, which in turn is supplied from a 15,000-gallon fuel oil storage tank. The technical specifications require a minimum of 10,000 gallons of diesel fuel stored on site for each diesel, a one hour fuel supply (245 gallons) in each diesel day tank and additional diesel fuel to be obtained and delivered to the site within an 8-hour period. The diesel loading requirements for hot and cold shutdown are listed in tables 3.1-1 and 3.2-3. The minimum required 10,205 gallons is enough diesel fuel for 72 hours of safeshutdown operation.
The diesel generator cooling water pump, fuel oil transfer pump, and ventilation fan normally start automatically when the diesel is started. Provisions have been made so the operator can start these auxiliaries locally for the 2/3 diesel generator (see Subsection 6.2.3.1.4).
The switchgear breakers are normally controlled from the control room or picked up automatically. For most fire areas, the necessary power is supplied by the other unit. Therefore, the necessary breaker control is still available in the control room. However, a fire in the control room or auxiliary electric equipment room could affect breaker control for both units. Local breaker control capability is installed for the 4-kV switchgear diesel feed breakers, the 4-kV switchgear normal feed breakers, the 4-kV to 480-V switchgear feed breakers, and the feeds to the control rod drive pumps, service water pumps and condensate transfer pumps (The 2A and 3A condensate transfer pumps are no longer credited for SSD) (see Subsections 6.2.1.2, 6.2.1.3, 6.2.2.2, and 6.2.2.3). Sufficient flexibility exists in the 125-Vdc system such that the operator can supply control power from either unit.
The service water system, in addition to being utilized as part of the decay heat removal function as makeup water to the isolation condenser (see Subsection 3.1.1.1.3), is used to cool the control rod drive pumps. The pumps are normally cooled by the Turbine Building closed cooling water system. Since several operator actions would be required to power this system in the event of a loss of offsite power, a new cooling line to each pump is routed from the service water system. The fire main is tied into the service water and may be used to cool the pumps as well. These lines are normally isolated by manual valves and will only be placed in service if necessary due to fire-induced damage and loss of offsite power (see Subsections 6.2.1.7 and 6.2.2.7). Cooling to the control rod drive pumps must be initiated with 1-1/2 hours of pump start.
The isolation condenser makeup pumps are each powered by their own diesel powered driver (2/3-43123A and 2/3-43123B). Each diesel engine is a 175 bhp, self-cooled engine. Each engine is supplied by a 75 gallon day tank (reference 2) which is, in turn, supplied by the 15,000 gallon Unit 2 fuel oil storage tank. The Unit 2 fuel oil transfer pump is used to transfer fuel from the storage tank to the day tank. The tank can be manually filled. Enough fuel is in the day tank to supply each engine for 8 hours. Additional diesel fuel can be obtained and delivered to the site within an 8 hour period.
If one of the diesel driven makeup pumps runs out of fuel, the other pump may be started to provide makeup water.
DRESDEN 2&3 AMENDMENT 21JUNE 2017
3.1-7
3.1.1.2 High Pressure Coolant Injection (HPCI) Method
The HPCI method of shutdown is used only for a fire on the isolation condenser floor of the Reactor Building, the isolation condenser pipe chase, and the TIP Room (Unit 3) or shutdown cooling pump room (Unit 2). Such a fire could disable the valves to the isolation condenser. The HPCI system will be used by the operator to control reactor pressure and maintain reactor water level. All of the necessary operator actions are available in the control room including instrument monitoring. Figures 3.1-4 and 3.1-5 show system arrangement.
3.1.1.2.1 Reactivity Control
Credit is assumed for reactor trip and verification of control rod insertion in the control room even for a postulated event that requires evacuation of the control room. This rapid action would be initiated prior to evacuation, should it be necessary. Any fire directly affecting control rod drive control circuits will cause a reactor trip even if not manually initiated from the control room. No attempt is made to ensure the availability of neutron monitoring instrumentation since control rod insertion is sufficient to ensure subcriticality (boration is not required). Upon loss of power the control rods are designed to be driven in automatically, and, in case of fire damage to the logic circuitry, the system is designed to fail in the safe position (control rods fully inserted).
3.1.1.2.2 Reactor Coolant Makeup
The HPCI system consists of a steam turbine driven pump that can take suction from either the suppression pool or the condensate storage tank and pump water to the reactor vessel. (See Figure 3.1-4.) The steam that runs the turbine comes from the reactor and is exhausted to the suppression pool. The HPCI system automatically initiates on low-low water level signal (-59 inches) or can be manually initiated from the control room.
The HPCI pump injects water from the condensate storage tank to the reactor vessel. The HPCI system pumps makeup water to the reactor at a rate of 5,600 gpm. The operator can manually operate the flow controller in the control room.
Condensate storage tank level is normally monitored in the control room on level indicators LI2/3-3341-3 and LI2/3-3341-4. Level can be monitored on mechanical indicators LI2/3-3341-77A and LI2/3-3341-77B located in the Turbine Building in the southeast corner of the Unit 2 reactor feed pump room. Water can also be added to the reactor vessel via the control rod drivepumps. If long-term operation of the HPCI system depletes the condensate storage supply, the operator will align the suction with the suppression pool by opening valves MO2(3)-2301-35 and MO2(3)-2301-36. The HPCI suction is automatically shifted to the suppression pool when the condensate storage tank contains less than 10,000 gallons. HPCI suction from the suppression pool has been evaluated as acceptable for pool temperatures up to 165°F, which is sufficient for the Appendix R shutdown transient. HPCI pump discharge pressure can be monitored in the control room on pressure indicator PI2(3)-2340-2 and locally on mechanical indicator PI2(3)-2357.
DRESDEN 2&3 AMENDMENT 21JUNE 2017
3.1-8
3.1.1.2.3 Reactor Pressure Control and Decay Heat Removal
Reactor pressure control and decay heat removal are accomplished by the HPCI turbine, being driven by reactor vessel steam, in conjunction with the electromatic relief valves 2(3)-0203-3B through 2(3)-0203-3E. The HPCI turbine steam supply line, the target rock valve, and the electromatic relief valves discharge to the suppression pool.
3.1.1.2.4 Suppression Pool Cooling
Continued operation of the HPCI system can result in heatup of the suppression pool water (see Subsection 3.1.1.2.3). One division of LPCI/CCSW is sufficient to remove decay heat from the suppression pool. (See Figure 3.1-5, Sheets 1 and 2.) The Division II LPCI/CCSW system was selected for this analysis. The operator will manually place the LPCI/CCSW system into operation in the torus cooling mode from the control room, thus maintaining the water temperature within acceptable limits. The operator will throttle flow as appropriate to obtain the desired cooling. Each LPCI pump is capable of providing a flow of 5,000 gpm. Each CCSW pump is capable of providing a flow of 3,500 gpm.
LPCI pump discharge pressure can be monitored on mechanical indicators PI2(3)-1501-48C and PI2(3)-1501-48D. CCSW pump discharge pressure can be monitored on mechanical indicators PI2(3)-1501-59C and PI2(3)-1501-59D. LPCI flow can be monitored on control room recorder 2(3)-1540-7 and flow indicator 2(3)-1540-11A & B. CCSW flow can be monitored on control room indicator FI2(3)-1540-1B. However, no credit is taken in this analysis for availability on control room LPCI or CCSW flow indication.
3.1.1.2.5 Process Monitoring Instrumentation
Reactor Level and Pressure
Reactor level and pressure are normally monitored in the control room on various instruments which are fed from two independent divisions. The operator can also locally monitor reactor level and pressure in the Reactor Building on instrument racks 2202(3)-7 and 2202(3)-8 at 517-foot elevation. Reactor temperature can be determined from saturation tables that are included with the safe shutdown procedure. However, no credit is taken in this analysis for availability of control room reactor level or reactor pressure indication.
Suppression Pool Level and Temperature
Suppression pool level indication is available in the control room on LI2(3)-1602-3. The
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-9
suppression pool temperature monitoring system is available as described in the Dresden Nuclear Power Station Units 2&3 NRC Docket Numbers 50-237 and 50-249 Plant Unique Analysis Volume 1 Section 1-5.2.
Isolation Condenser Level
The isolation condenser is not utilized for this shutdown method (see Subsection 3.1.1.2).
Diagnostic Instrumentation for Shutdown Systems.
Discharge pressure indication is provided for the HPCI, LPCI, and CCSW pumps (see Subsections 3.1.1.2.2. and 3.1.1.2.4).
Level Indication for Tanks
Level indication is provided for the condensate storage tank (see Subsection 3.1.1.2.2).
3.1.1.2.6 Support
The ac and dc power supplies to hot shutdown equipment are shown on Figure 3.1-3.
The necessary loads for the HPCI shutdown method will be supplied by the dedicated diesel generator (2 or 3). The HPCI valves and auxiliary pumps are powered from the 250-Vdc battery. Action is required by the operator to place the Division II 250-V battery charger into operation for long-term HPCI use. All other electrical distribution will be in service automatically upon loss of offsite power; however, the operator may shed loads from the diesel that are not necessary for safe shutdown. All of the necessary breakers will be operated from the control room. LPCI/CCSW lineup for torus cooling is also controlled from the control room. All LPCI/CCSW equipment is powered by 4-kV and 480-V power. 125-Vdc power is used for breaker control and HPCI control.
The HPCI and LPCI pump room coolers are supplied with cooling water from the service water or containment cooling service water pumps. (See Figure 3.1-6, Sheets 1 and 2.) The operator will place the HPCI room cooler in operation and verify that the LPCI room cooler is in service. The operator will also verify that the CCSW room coolers, which are fed by the CCSW pumps, are in service.
3.1.1.2.6.1 HVAC Systems
The HVAC systems at Dresden Station were reviewed using the following criteria to determine their impact on safe shutdown.
1. If the area was served by safety-related ventilation, that ventilation was necessary for safe shutdown.
2. If the area was served only by a non-safety-related ventilation system, the equipment in the
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-10
area was qualified for loss of ventilation conditions. The conditions resulting from a design-basis accident will be the same or worse than the conditions in the event of a fire.
3.1.2 Description of Hot Shutdown Paths
3.1.2.1 Shutdown Path A
Shutdown path A is the normal isolation condenser shutdown method for Unit 2. No alternative shutdown system modifications are necessary for this path. All automatic and manual control capability is available from the control room. This path is used to shutdown Unit 2 for a fire on the refueling floor of the Reactor Building (Fire Zone 1.1.2.6) and Fire Area TB-IV, if shutdown is required. Sections 4.2 and 4.11 describe application of shutdown path A in those two fire areas, respectively. These floors contain no safe shutdown equipment or cabling, therefore, shutdown may not be warranted for fires occurring on these floors. The path is also utilized for a fire in the Crib House (Fire Zone 11.3) if the 2/3 diesel generator cooling water pump is not damaged. Section 4.13 describes application of shutdown path A for a fire in the Crib House.
Table 3.1-3 lists the equipment utilized for shutdown path A.
3.1.2.2 Alternative Shutdown Path A1
Alternative shutdown path A1, a variation of the normal isolation condenser shutdown method, utilizes the Unit 2 pumps and power train via mechanical crossties to shut down Unit 3. The A1 shutdown path is available to shut down Unit 3 for a fire in Fire Area RB3-II and the Western Zone Group of the Turbine Building (TB-III). (Note that shutdown path B is used to shutdown Unit 3 for a fire on the Unit 3 Refuel Floor although it is part of Fire Area RB3-II). Sections 4.5 and 4.10 describe shutdown method A1 for the fire in Fire Areas RB3-II and TB-III.
Fires in these fire areas have the potential for damaging the power and control cables to required isolation condenser valves used for makeup to the isolation condenser, and the CRD pumps and discharge valves used to provide for reactor vessel makeup for Unit 3. However, Unit 2 would be unaffected by fires in those areas and therefore the Unit 2 equipment is available for use. The manual actions required for this shutdown path are identified in Table 7.3-2. Table 3.1-4 lists the equipment utilized by shutdown path A1. Modifications made to ensure the availability of this path are identified in Sections 4.5 and 4.10.
3.1.2.3 Alternative Shutdown Path A2
Alternative shutdown path A2 is a variation of the normal isolation condenser shutdown method for Unit 2 (shutdown path A). Shutdown path A2 is available to shut down Unit 2 for a fire in Fire Area TB-V or Fire Area TB-II (Central Zone Group of the Turbine Building).
The major difference between the A2 path and the normal path A is that the A2 path requires a number of manual actions by the operators due to the possibility that fire in the areas utilizing A2 would damage the power and control cables to required Unit 2 isolation condenser valves and/or pumps used for isolation condenser makeup and CRD pumps and/or valves used for reactor
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-11
vessel inventory makeup. Manual operations are identified in Tables 7.3-1, 7.3-2 and 7.3-3. In addition, a fire in the areas where the use of path A2 is postulated has the potential for affecting both units. In those areas where required Unit 2 equipment may be damaged by a fire but where only Unit 2 is affected, other paths (mainly B1) are available.
Section 4.12 describes the use of shutdown path A2 for a fire in TB-V. Section 4.9 describes the use of shutdown path A2 for a fire in TB-II. The above subsections also identify all modifications made to ensure the availability of this shutdown path. Table 3.1-5 lists the equipment utilized by shutdown path A2.
3.1.2.4 Shutdown Path B
Shutdown path B is the normal isolation condenser shutdown method for Unit 3. No alternative shutdown system modifications are necessary for this path. All automatic and manual control capability is available for the control room. This path utilizes Unit 3 power and support equipment along with the Unit 3 isolation condenser. This path is used for the shutdown of Unit 3 for a fire on the refueling floor of the Reactor Building (Fire Zone 1.1.1.6) and Fire Area TB-IV, if shutdown is required. Sections 4.5 and 4.11 describe application of shutdown path B in these two areas, respectively. These floors contain no safe shutdown equipment or cabling, therefore, shutdown may not be warranted for fires occurring on these floors. The path is also utilized for a fire in the Crib House (Fire Zone 11.3) if the 2/3 diesel generator cooling water pump is not damaged. Section 4.13 describes application of shutdown path B for a fire in the Crib House.
Table 3.1-6 lists the equipment utilized by shutdown path B.
3.1.2.5 Alternative Shutdown Path B1
Alternative shutdown path B1, a variation of the normal isolation condenser shutdown method, utilizes the Unit 3 pumps and power train via mechanical crossties to shut down Unit 2. The Unit 2 isolation condenser is used with this shutdown method. The B1 shut down path is available to shut down Unit 2 for a fire in Fire Area RB2-II and Fire Area TB-1.(Note that shutdown path A is used to shutdown Unit 2 for a fire on the Unit 2 Refuel Floor although it is part of Fire Area RB2-II.) Sections 4.2 and 4.8 describe shutdown method B1 for a fire in Fire Areas RB2-II and TB-I.
Fires in these areas have the potential for damaging the power and control cables to required isolation condenser valves and pumps used for makeup to the isolation condenser and the CRD pumps and discharge valves used to provide for reactor vessel makeup for Unit 2. However, Unit 3 would be unaffected by fires in those areas and therefore the Unit 3 equipment is available for use. In addition, the Unit 2 isolation condenser makeup valves could be manually operated to enable the isolation condenser makeup pumps to provide makeup water to the isolation condenser. Fire in these areas also have the potential to render inoperable the Unit 2 fuel oil transfer pump which supplies fuel oil to the isolation condenser makeup pump diesel oil day tanks. These tanks, however, can fuel the diesel engines for greater than 8 hours. Additional fuel can be brought on site within 8 hours and the day tanks can be manually filled.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-12
If one of the diesel driven makeup pumps runs out of fuel, the other pump may be started to provide makeup water.
The manual actions required for this shutdown path are identified in Table 7.3-2. Table 3.1-7 liststhe equipment utilized by shutdown path B1. Modifications made to ensure the availability of this path are outlined in Section 4.2 and 4.8.
3.1.2.6 Alternative Shutdown Path B2
Alternative shutdown path B2 is a variation of the normal isolation condenser shutdown method for Unit 3 (shutdown path B). Shutdown path B2 is available to shut down Unit 3 for a fire in Fire Area TB-V and Fire Area TB-II.
The major difference between the B2 path and the normal path B is that the B2 path requires a number of manual actions by the operators due to the possibility that fire in the areas utilizing path B2 would damage the power and control cables to required Unit 3 isolation condenser valves and/or pumps used for isolation condenser makeup, and CRD pumps and/or valves used for reactor vessel inventory makeup. Manual operations are identified in Tables 7.3-1, 7.3-2, and 7.3-3. In addition, a fire in the areas where the use of path B2 is postulated has the potential for affecting both units. In those areas where required Unit 3 equipment may be damaged by a fire but where only Unit 3 is affected, other paths (mainly A1) are available.
Section 4.12 describes the use of shutdown path B2 for a fire in TB-V. Section 4.9 describes the use of shutdown path B2 for a fire in TB-II. The above sections also identify all modifications made to ensure the availability of this shutdown path. Table 3.1-5 lists the equipment utilized by shutdown path B2.
3.1.2.7 Shutdown Path C
Shutdown path C is the only Appendix R shutdown path for Unit 2 that does not utilize the isolation condenser. This path is employed only when a fire directly affects the isolation condenser, the isolation condenser valves, and/or the Division I electrical penetration area (Fire Zone 1.3.2); i.e., when a fire occurs in RB2-I.
This path, using the HPCI and LPCI/CCSW systems, is totally independent of Fire Area RB2-I and all necessary automatic and manual actions can be performed from the control room.
Table 3.1-8 lists the equipment utilized by shutdown path C.
3.1.2.8 Shutdown Path D
Shutdown path D is the only Appendix R shutdown path for Unit 3 that does not utilize the isolation condenser. This path is employed only when a fire directly affects the isolation condenser, the isolation condenser valves, and/or the Division I electrical penetration area (Fire Zone 1.4.1); i.e., when a fire occurs in RB3-I.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-13
This path, using the HPCI and LPCI/CCSW systems, is totally independent of Fire Area RB3-I and all necessary automatic and manual actions can be performed from the control room.
Table 3.1-9 lists the equipment utilized by shutdown path D.
3.1.2.9 Shutdown Path E
Shutdown path E differs from the Unit 2 isolation condenser shutdown path A in that it utilizes the dedicated diesel generator 2 (Electrical Division II) to power the necessary equipment rather than the 2/3 diesel generator (Electrical Division I). As a result, Division II equipment is utilized rather than Division I.
Shutdown path E is available to shut down Unit 2 for a fire in Fire Area RB 2/3 and in the Crib House (Fire Zone 11.3) if the cooling water pump for the 2/3 diesel generator is affected. Sections 4.7 and 4.13, respectively, describe the application of shutdown path E in these areas.
All automatic and manual actions required for this shutdown method can be performed from the control room, except for those items listed in Sections 4.7 and 4.13.
Table 3.1-10 lists the equipment utilized by shutdown path E.
3.1.2.10 Shutdown Path F
Shutdown path F differs from the Unit 3 isolation condenser shutdown path B in that it utilizes the dedicated diesel generator 3 (Electrical Division II) to power the necessary equipment rather than the 2/3 diesel generator (Electrical Division I). As a result, Division II equipment is utilized rather than Division I.
Shutdown path F is available to shut down Unit 3 for a fire in Fire Area RB 2/3 and the Crib House (Fire Zone 11.3) if the cooling water pump for the 2/3 diesel generator is affected. Sections 4.7 and 4.13, respectively, describe the application of shutdown path F in these areas.
All automatic and manual actions required for this shutdown method can be performed from the control room, except for those items listed in the above sections.
Table 3.1-11 lists the equipment utilized by shutdown path F.
DRESDEN 2&3 AMENDMENT 14JUNE 2003
3.1-14
TABLE 3.1-1
DIESEL GENERATOR(1) LOADING FOR HOT SAFE SHUTDOWN(2)(4)
Loads (Each) Bhp No.Net bhp Required
Service Water Pump(s) 1 950 950Emergency ac Lighting 2 30 60480-V Transformer Losses 2 15 30Essential Instrumentation and Battery Charger 2 141 282Diesel Auxiliaries (Cooling Water Pump, Fuel Transfer Pump, and Vent Fan and Starting Air Compressor) 1 147.5 147.5Control Rod Drive Pump(s) 2 250 500 Total 1969.5
kW required = bhp x .746 / .93 (motor Eff) = 1580 kW
(1) Each DG is rated at 2600 kW at 0.8 power factor and for 10% overload for 2000 hoursper year.
(2) Simultaneous hot shutdown of both Unit 2 and Unit 3 on one diesel generator is assumed.
(3) Data from Table 8.3-3 of UFSAR or nameplate .
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-15
TABLE 3.1-2
OUTLINE OF APPENDIX R SHUTDOWN PATHS
ShutdownPath
Unit Shutdown
Major Shutdown System
Electrical Power Train To Be
Utilized*
Diesel Generator
To Be Used
Manual Operations Required
A Unit 2 Isolation Condenser Unit 2 Swing NoA1 Unit 3 Isolation Condenser Unit 2 Swing YesA2 Unit 2 Isolation Condenser Unit 2 Swing YesB Unit 3 Isolation Condenser Unit 3 Swing NoB1 Unit 2 Isolation Condenser Unit 3 Swing YesB2 Unit 3 Isolation Condenser Unit 3 Swing YesC Unit 2 HPCI/LPCI Unit 2 Unit 2 N/AD Unit 3 HPCI/LPCI Unit 3 Unit 3 N/AE Unit 2 Isolation Condenser Unit 2 Unit 2 NoF Unit 3 Isolation Condenser Unit 3 Unit 3 No
* Crossties are provided in the service water, condensate transfer, and control rod drive water piping such that the opposite unit can also be serviced by the unaffected unit's pumps. Normally closed, manually operated valves must be opened to establish the CRD water crosstie. Procedures have been developed to utilize this capability.
DRESDEN 2&3 AMENDMENT 19JUNE 2013
* Spurious operation concern only3.1-16
TABLE 3.1-3
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH AEquipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 2A-302-3 8.2.2.AControl Rod Drive Hydraulic Units 1.1.2.2*Electromatic Relief Valves 2-203-3B through E 1.2.2Isolation Condenser 2-1302 1.1.2.5.AIsolation Condenser Valve MO2-1301-1 1.2.2Isolation Condenser Valve MO2-1301-2 1.1.2.5.BIsolation Condenser Valve MO2-1301-3 1.1.2.5.CIsolation Condenser Valve MO2-1301-4 1.2.2Isolation Condenser Valve MO2-1301-10 1.1.2.5.AIsolation Condenser Valve MO2-4102 1.1.2.5.AIsolation Condenser Valve 2-1301-16 1.1.2.5.AIsolation Condenser Valve AO2-1301-17 1.1.2.5.AIsolation Condenser Valve AO2-1301-20 1.1.2.5.A*RWCU Valve MO2-1201-2 1.1.2.3*RWCU Valve MO2-1201-3 1.1.2.3Service Water Pump 2A-3901 11.3*Target Rock Valve 2-203-3A 1.2.2Safety Valves 1.2.2*Main Steam Isolation Valve 2-203-1A 1.2.2*Main Steam Isolation Valve 2-203-1B 1.2.2*Main Steam Isolation Valve 2-203-1C 1.2.2*Main Steam Isolation Valve 2-203-1D 1.2.2*Main Steam Isolation Valve 2-203-2A 8.2.5.A*Main Steam Isolation Valve 2-203-2B 8.2.5.A*Main Steam Isolation Valve 2-203-2C 8.2.5.A*Main Steam Isolation Valve 2-203-2D 8.2.5.AService Water Cooling to CRD Pump Valve 2-3999-360 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-361 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-357 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-348 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-349 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-358 8.2.2.A
DRESDEN 2&3 AMENDMENT 16JUNE 2007
3.1-17
TABLE 3.1-3
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH AEquipment Location By Fire Zone
TBCCW Cooling to CRD Pumps 2-3899-205 8.2.2.ATBCCW Cooling to CRD Pumps 2-3899-204 8.2.2.ACRD Discharge Valve MO2-0301-2A 8.2.2.ADrive Water Filter Inlet Valve 2-301-9A 1.1.2.2Drive Water Filter Inlet Valve 2-301-9B 1.1.2.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 2-1301-644 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-633 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-634 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-39 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-40 1.1.2.5.AIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank A 2/3-5215B 18.7.2Demineralized Water Tank T-105B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isolation Condenser Supply Isolation Valve MO2-4399B-74 1.1.2.5.AISCO Makeup Room A Damper 2/3-57854A 18.7.1ISCO Makeup Room B Damper 2/3-57854B 18.7.2DG Fuel Oil Transfer Pump 2-5203 9.0.ADG Fuel Oil Storage Tank 2-5201 OutsideUnit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124A OutsideTBCCW Heat Exchanger Outlet Isolation Valves2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-18
TABLE 3.1-3
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH AEquipment Location By Fire Zone
3-3904-500 8.2.6.CTurbine Oil Cooler Outlet Isolation Valves2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENTDiesel Generator 2/3 9.0.CDG Cooling Water Pump 2/3-3903 11.3DG Vent Fan 2/3-5790 9.0.CDG Fuel Oil Transfer Pump 2/3-5203 9.0.C4-kV Bus 23 8.2.6.A4-kV Bus 23-1 1.1.2.34-kV SWGR 40 9.0.C480-V Bus 28 1.1.2.4480-V MCC 28-1 1.1.2.2480-V MCC 28-3 8.2.6.A250-Vdc Battery 3 7.0.B250-Vdc Turbine Building MCC 3 6.1250-Vdc MCC 2A 1.1.2.4250-Vdc MCC 2B 1.1.2.4125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 7.0.A125-Vdc Main Bus 2A-1 7.0.AControl Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2250 Vdc MCC 2A 1.1.2.4250 Vdc MCC3 6.1250 Vdc MCC 2B 1.1.2.4250 V Battery #3 7.0.BControl Panel 902-3 2.0Control Panel 923-1 2.0480 V MCC 29-2 8.2.5.A
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-19
TABLE 3.1-3
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH AEquipment Location By Fire Zone
480 V Bus 29 1.1.2.4125-Vdc Distribution Panel 2 1.1.2.4
INSTRUMENTATIONCondensate Storage Tank Level Indicator 2/3-3341-77A & B 8.2.5.AService Water Pressure Indicator 2-3941-8A 11.3Reactor Local Instrumentation LI2-263-151A & B 1.1.2.2Reactor Local Instrumentation PI2-263-139A & B 1.1.2.2Reactor Local Instrumentation PI2-263-60A & B 1.1.2.3Reactor Local Instrumentation LI2-263-59A & B 1.1.2.3Diesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-4341-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-4341-25 18.7.2ISCO Makeup Pump Flow Indicator 2/3-4341-152 18.7.1Fire Protection System Pressure Indicator PI 2/3-4141-4A 11.3
DRESDEN 2&3 AMENDMENT 19JUNE 2013
! Spurious operation concern only3.1-20
TABLE 3.1-4
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A1Equipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 2A-302-3 8.2.2.AControl Rod Drive Hydraulic Units 1.1.1.2*Electromatic Relief Valves 3-203-3B through E 1.2.1Isolation Condenser 3-1302 1.1.1.5.AIsolation Condenser Valve MO3-1301-1 1.2.1Isolation Condenser Valve MO3-1301-2 1.1.1.5.BIsolation Condenser Valve MO3-1301-3 1.1.1.5.CIsolation Condenser Valve MO3-1301-4 1.2.1Isolation Condenser Valve MO3-1301-10 1.1.1.5.AIsolation Condenser Valve MO3-4102 1.1.1.5.AIsolation Condenser Valve 3-1301-16 1.1.1.5.AIsolation Condenser Valve AO3-1301-17 1.1.1.5.AIsolation Condenser Valve AO3-1301-20 1.1.1.5.A*RWCU Valve MO3-1201-2 1.1.1.3*RWCU Valve MO3-1201-3 1.1.1.3*RWCU Valve PCV-3-1217 1.1.1.3Service Water Pump 2A-3901 11.3*Target Rock Valve 3-203-3A 1.2.1Safety Valves 1.2.1*Main Steam Isolation Valve 3-203-1A 1.2.1*Main Steam Isolation Valve 3-203-1B 1.2.1*Main Steam Isolation Valve 3-203-1C 1.2.1*Main Steam Isolation Valve 3-203-1D 1.2.1*Main Steam Isolation Valve 3-203-2A 8.2.5.E*Main Steam Isolation Valve 3-203-2B 8.2.5.E*Main Steam Isolation Valve 3-203-2C 8.2.5.E*Main Steam Isolation Valve 3-203-2D 8.2.5.EService Water Cooling to CRD Pump Valve 2-3999-360 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-361 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-357 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-348 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-349 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-358 8.2.2.A
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-21
TABLE 3.1-4
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A1Equipment Location By Fire Zone
TBCCW Cooling to CRD Pumps 2-3899-205 8.2.2.A
TBCCW Cooling to CRD Pumps 2-3899-204 8.2.2.A
CRD Discharge Valve MO2-0301-2A 8.2.2.A
Drive Water Filter Inlet Valve 3-301-9A 1.1.1.2
Drive Water Filter Inlet Valve 3-301-9B 1.1.1.2
Condensate Storage Tank Discharge Valves 2/3-3346-500 Outside
Condensate Storage Tank Discharge Valves 2/3-3327-A-500 Outside
Condensate Storage Tank Discharge Valves 2/3-2301-12 Outside
Service Water Connection to Fire System 2-3906 11.3
Isolation Condenser Sightglass 3-1301-644 1.1.1.5.A
Isolation Condenser Sightglass Isolation Valves 3-1300-202 1.1.1.5.A
Isolation Condenser Sightglass Isolation Valves 3-1300-203 1.1.1.5.A
Isolation Condenser Sightglass Isolation Valves 3-1301-39 1.1.1.5.A
Isolation Condenser Sightglass Isolation Valves 3-1301-40 1.1.1.5.A
CRD Cross-tie Valve 2/3-0301-162 8.2.6.C
CRD Cross-tie Valve 2/3-0301-163 8.2.6.C
Isolation Condenser Makeup Pump 2/3-43122A 18.7.1
Isolation Condenser Makeup Pump 2/3-43122B 18.7.2
Diesel Oil Day Tank A 2/3-5215A 18.7.1
Diesel Oil Day Tank B 2/3-5215B 18.7.2
Demineralized Water Tank T-105B Outside
Isolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1
Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2
Isolation Condenser Supply Isolation Valve MO3-4399-74 1.1.1.5.A
ISCO Makeup Room A Damper 2/3-57854A 18.7.1
ISCO Makeup Room B Damper 2/3-57854B 18.7.2
DG Fuel Oil Transfer Pump 2-5203 9.0.A
DG Fuel Oil Storage Tank 2-5201 Outside
Unit 2/3 Diesel Fire Pump 2/3-4102 11.3
Unit 1 Fire Pump K124A Outside
TBCCW Heat Exchanger Outlet Isolation Valves
2-3904-501 8.2.6.C
3-3904-501 8.2.6.C
2-3904-500 8.2.6.C
3-3904-500 8.2.6.C
Turbine Oil Cooler Outlet Isolation Valves
2-3906-500 8.2.6.C
3-3906-500 8.2.6.C
DRESDEN 2&3 AMENDMENT 19JUNE 2013
3.1-22
TABLE 3.1-4
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A1Equipment Location By Fire Zone
2-3906-501 8.2.6.C3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENTDiesel Generator 2/3 9.0.CDG Cooling Water Pump 2/3-3903 11.3DG Vent Fan 2/3-5790 9.0.CDG Fuel Oil Transfer Pump 2/3-5203 9.0.C4-kV SWGR 23 8.2.6.A4-kV SWGR 23-1 1.1.2.34-kV SWGR 40 9.0.C480-V Bus 28 1.1.2.4480-V MCC 28-1 1.1.2.2480-V MCC 28-2 8.2.6.A480-V MCC 28-3 8.2.6.A125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 7.0.A125-Vdc Main Bus 2A-1 7.0.A125-Vdc Distribution Panel 2 1.1.2.4CRD Local Start Panel 2252-76 8.2.2.AControl Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2250 Vdc MCC 2 6.1250 Vdc MCC 3A 1.1.1.4250 Vdc MCC 3B 1.1.1.4250 V Battery #2 7.0.AControl Panel 902-3 2.0Control Panel 923-1 2.0480 V MCC 29-2 8.2.5.A480 V Bus 29 1.1.2.4
INSTRUMENTATIONService Water Pressure Indicator 2-3941-8A 11.3Reactor Local Level Instrumentation LI3-263-151A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-139A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-60A & B 1.1.1.3Reactor Local Level Instrumentation LI3-263-59A & B 1.1.1.3
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-23
TABLE 3.1-4
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A1Equipment Location By Fire Zone
Condensate Storage Tank Level Indicator 2/3-3341-77A & B 8.2.5.AFire Protection Systems Pressure Indicator PI 2/3-4141-4A 11.3Diesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-4341-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-4341-25 18.7.2ISCO Makeup Pump Flow Indicator 2/3-4341-152 18.7.1
DRESDEN 2&3 AMENDMENT 19JUNE 2013
* Spurious operation concern only3.1-24
TABLE 3.1-5
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A2/B2Equipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 2A-302-3 8.2.2.AControl Rod Drive Hydraulic Units 1.1.2.2*Electromatic Relief Valves 2-203-3B through E 1.2.2Isolation Condenser 2-1302 1.1.2.5.AIsolation Condenser Valve MO2-1301-1 1.2.2Isolation Condenser Valve MO2-1301-2 1.1.2.5.BIsolation Condenser Valve MO2-1301-3 1.1.2.5.CIsolation Condenser Valve MO2-1301-4 1.2.2Isolation Condenser Valve MO2-1301-10 1.1.2.5.AIsolation Condenser Valve MO2-4102 1.1.2.5.AIsolation Condenser Valve 2-1301-16 1.1.2.5.AIsolation Condenser Valve AO2-1301-17 1.1.2.5.AIsolation Condenser Valve AO2-1301-20 1.1.2.5.A*RWCU Valve MO2-1201-2 1.1.2.3*RWCU Valve MO2-1201-3 1.1.2.3Service Water Pump 2A-3901 11.3*Target Rock Valve 2-203-3A 1.2.2Safety Valves 1.2.2*Main Steam Isolation Valve 2-203-1A 1.2.2*Main Steam Isolation Valve 2-203-1B 1.2.2*Main Steam Isolation Valve 2-203-1C 1.2.2*Main Steam Isolation Valve 2-203-1D 1.2.2*Main Steam Isolation Valve 2-203-2A 8.2.5.A*Main Steam Isolation Valve 2-203-2B 8.2.5.A*Main Steam Isolation Valve 2-203-2C 8.2.5.A*Main Steam Isolation Valve 2-203-2D 8.2.5.AService Water Cooling to CRD Pump Valve 2-3999-360 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-361 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-357 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-348 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-349 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-358 8.2.2.ATBCCW Cooling to CRD Pumps 2-3899-205 8.2.2.A
DRESDEN 2&3 AMENDMENT 13JUNE 2001
* Spurious operation concern only3.1-25
TABLE 3.1-5
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A2/B2
Equipment Location By Fire ZoneTBCCW Cooling to CRD Pumps 2-3899-204 8.2.2.ACRD Discharge Valve MO2-0301-2A 8.2.2.ADrive Water Filter Inlet Valve 2-301-9A 1.1.2.2Drive Water Filter Inlet Valve 2-301-9B 1.1.2.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 2-1301-644 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-633 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-634 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-39 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-40 1.1.2.5.AControl Rod Drive Pump 3A-302-3 8.2.2.BControl Rod Drive Hydraulic Units 1.1.1.2*Electromatic Relief Valves 3-203-3B through E 1.2.1Isolation Condenser 3-1302 1.1.1.5.AIsolation Condenser Valve MO3-1301-1 1.2.1Isolation Condenser Valve MO3-1301-2 1.1.1.5.BIsolation Condenser Valve MO3-1301-3 1.1.1.5.CIsolation Condenser Valve MO3-1301-4 1.2.1Isolation Condenser Valve MO3-1301-10 1.1.1.5.AIsolation Condenser Valve MO3-4102 1.1.1.5.AIsolation Condenser Valve 3-1301-16 1.1.1.5.AIsolation Condenser Valve AO3-1301-17 1.1.1.5.AIsolation Condenser Valve AO3-1301-20 1.1.1.5.A*RWCU Valve MO3-1201-2 1.1.1.3*RWCU Valve MO3-1201-3 1.1.1.3Service Water Pump 3A-3901 11.3*Target Rock Valve 3-203-3A 1.2.1Safety Valves 1.2.1*Main Steam Isolation Valve 3-203-1A 1.2.1*Main Steam Isolation Valve 3-203-1B 1.2.1*Main Steam Isolation Valve 3-203-1C 1.2.1*Main Steam Isolation Valve 3-203-1D 1.2.1*Main Steam Isolation Valve 3-203-2A 8.2.5.E*Main Steam Isolation Valve 3-203-2B 8.2.5.E
DRESDEN 2&3 AMENDMENT 19JUNE 2013
* Spurious operation concern only3.1-26
TABLE 3.1-5
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A2/B2
Equipment Location By Fire Zone*Main Steam Isolation Valve 3-203-2C 8.2.5.E*Main Steam Isolation Valve 3-203-2D 8.2.5.EService Water Cooling to CRD Pump Valve 3-3999-360 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-361 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-357 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-348 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-349 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-358 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-205 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-204 8.2.2.BCRD Discharge Valve MO3-0301-2A 8.2.2.BDrive Water Filter Inlet Valve 3-301-9A 1.1.1.2Drive Water Filter Inlet Valve 3-301-9B 1.1.1.2Isolation Condenser Sightglass 3-1301-644 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-202 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-203 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-39 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-40 1.1.1.5.AIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank B 2/3-5215B 18.7.2Demineralized Water Tank T-105B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isolation Condenser Supply Isolation Valve MO2-4399-74 1.1.2.5.AIsolation Condenser Supply Isolation Valve MO3-4399-74 1.1.1.5.AISCO Makeup Room A Damper 2/3-57854A 18.7.1ISCO Makeup Room B Damper 2/3-57854B 18.7.2DG Fuel Oil Transfer Pump 2-5203 9.0.ADG Fuel Oil Storage Tank 2-5201 OutsideUnit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124A Outside
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-27
TABLE 3.1-5
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A2/B2Equipment Location By Fire Zone
TBCCW Heat Exchanger Outlet Isolation Valves2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C3-3904-500 8.2.6.CTurbine Oil Cooler Outlet Isolation Valves2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENTDiesel Generator 2/3 9.0.CDG Cooling Water Pump 2/3-3903 11.3DG Vent Fan 2/3-5790 9.0.CDG Fuel Oil Transfer Pump 2/3-5203 9.0.C4-kV SWGR 23 8.2.6.A4-kV SWGR 23-1 1.1.2.34-kV SWGR 40 9.0.C480-V Bus 28 1.1.2.4480-V MCC 28-1 1.1.2.2480-V MCC 28-3 8.2.6.A125-Vdc Battery 2 7.0.A125-Vdc Battery Bus #2 7.0.A125-Vdc Main Bus 2A-1 7.0.A125-Vdc Distribution Panel 2 1.1.2.4125-Vdc Main Bus 3A 6.1125-Vdc Distribution Panel 3 1.1.1.4125-Vdc Battery 3 7.0.B125-Vdc Battery Bus #3 6.14-kV SWGR 33 8.2.6.E4-kV SWGR 33-1 1.1.1.3480-V Bus 38 1.1.1.4480-V MCC 38-1 1.1.1.2
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-28
TABLE 3.1-5
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH A2/B2Equipment Location By Fire Zone
ELECTRICAL EQUIPMENT480-V MCC 38-3 8.2.6.E125-Vdc Main Bus 3 8.2.6.E125-Vdc Main Bus 3A-1 8.2.6.E480 V MCC 29-2 8.2.5.A480 V Bus 29 1.1.2.4Control Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2250 Vdc MCC 2A 1.1.2.4250 Vdc MCC 2B 1.1.2.4250 V Battery #3 7.0.B250 Vdc MCC 3 6.1250 Vdc MCC 3A 1.1.1.4250 Vdc MCC 3B 1.1.1.4250 Vdc MCC 2 7.0.A250 V Battery #2 7.0.A
INSTRUMENTATIONLocal Mechanical Reactor Level Indicators 1.1.2.2Local Mechanical Reactor Pressure Indicators 1.1.2.2Service Water Pressure Indicator 2-3941-8A 11.3Service Water Pressure Indicator 3-3941-8A 11.3Fire Protection System Pressure Indicators PI 2/3-4141-4A 11.3Reactor Local Level Instrumentation LI2-263-151A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-139A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-60A & B 1.1.2.3Reactor Local Level Instrumentation LI2-263-59A & B 1.1.2.3Condensate Storage Tank Level Indicator 2/3-3341-77A & B 8.2.5.ADiesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-4341-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-4341-25 18.7.2ISCO Makeup Pump Flow Indicator 2/3-4341-152 18.7.1
DRESDEN 2&3 AMENDMENT 19JUNE 2013
! Spurious operation concern only3.1-29
TABLE 3.1-6
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH BEquipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 3A-302-3 8.2.2.BControl Rod Drive Hydraulic Units 1.1.1.2*Electromatic Relief Valves 3-203-3B through E 1.2.1Isolation Condenser 3-1302 1.1.1.5.AIsolation Condenser Valve MO3-1301-1 1.2.1Isolation Condenser Valve MO3-1301-2 1.1.1.5.BIsolation Condenser Valve MO3-1301-3 1.1.1.5.CIsolation Condenser Valve MO3-1301-4 1.2.1Isolation Condenser Valve MO3-1301-10 1.1.1.5.AIsolation Condenser Valve MO3-4102 1.1.1.5.AIsolation Condenser Valve 3-1301-16 1.1.1.5.AIsolation Condenser Valve AO3-1301-17 1.1.1.5.AIsolation Condenser Valve AO3-1301-20 1.1.1.5.A*RWCU Valve MO3-1201-2 1.1.1.3*RWCU Valve MO3-1201-3 1.1.1.3Service Water Pump 3A-3901 11.3*Target Rock Valve 3-203-3A 1.2.1Safety Valves 1.2.1*Main Steam Isolation Valve 3-203-1A 1.2.1*Main Steam Isolation Valve 3-203-1B 1.2.1*Main Steam Isolation Valve 3-203-1C 1.2.1*Main Steam Isolation Valve 3-203-1D 1.2.1*Main Steam Isolation Valve 3-203-2A 8.2.5.E*Main Steam Isolation Valve 3-203-2B 8.2.5.E*Main Steam Isolation Valve 3-203-2C 8.2.5.E*Main Steam Isolation Valve 3-203-2D 8.2.5.EService Water Cooling to CRD Pump Valve 3-3999-360 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-361 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-357 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-348 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-349 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-358 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-205 8.2.2.B
DRESDEN 2&3 AMENDMENT 13JUNE 2001
**If available, however not credited3.1-30
TABLE 3.1-6
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B
Equipment Location By Fire ZoneTBCCW Cooling to CRD Pumps 3-3899-204 8.2.2.BCRD Discharge Valve MO3-0301-2A 8.2.2.BDrive Water Filter Inlet Valve 3-301-9A 1.1.1.2Drive Water Filter Inlet Valve 3-301-9B 1.1.1.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 3-1301-644 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-202 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-203 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-39 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-40 1.1.1.5.AIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank B 2/3-5215B 18.7.2Demineralized Water Tank T-105B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isolation Condenser Supply Isolation Valve MO3-4399-74 1.1.1.5.AISCO Makeup Room A Damper 2/3-57854A 18.7.1ISCO Makeup Room B Damper 2/3-57854B 18.7.2**DG Fuel Oil Transfer Pump 2-5203 9.0.A**DG Fuel Oil Storage Tank 2-5201 OutsideUnit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124 OutsideTBCCW Heat Exchanger Outlet Isolation Valves2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C3-3904-500 8.2.6.CTurbine Oil Cooler Outlet Isolation Valves2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C
DRESDEN 2&3 AMENDMENT 19JUNE 2013
**If available, however not credited3.1-31
TABLE 3.1-6
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B
Equipment Location By Fire Zone3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENT Location By Fire ZoneDiesel Generator 2/3 9.0.CDG Cooling Water Pump 2/3-3903 11.3DG Vent Fan 2/3-5790 9.0.CDG Fuel Oil Transfer Pump 2/3-5203 9.0.C4-kV SWGR 33 8.2.6.E4-kV SWGR 33-1 1.1.1.3480-V Bus 38 1.1.1.4480-V Bus 39 1.1.1.4480-V MCC 38-1 1.1.1.2480-V MCC 38-3 8.2.6.E480-V MCC 38-4 1.1.1.2250-Vdc Battery 2 7.0.A250-Vdc Turbine Building MCC 2 7.0.A250-Vdc MCC 3A 1.1.1.4250-Vdc MCC 3B 1.1.1.4125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 7.0.A125-Vdc Battery 3 7.0.B125-Vdc Battery Bus 3 6.1125-Vdc Main Bus 3A 8.2.6.E125-Vdc Main Bus 3A-1 6.1125-Vdc Distribution Panel 3 1.1.1.4120/240-V Essential Service Distribution Panel 903-49 6.2120/240-V Instrument Bus 903-50 6.2CRD Local Start Panel 2253-76 8.2.2.BADS Inhibit Switch 2.0Control Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2Control Panel 903-3 2.0Control Panel 923-1 2.0**480 V MCC 29-2 8.2.5.A
DRESDEN 2&3 AMENDMENT 22JUNE 2019
**If available, however not credited3.1-32
TABLE 3.1-6
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B
Equipment Location By Fire Zone**480 V Bus 29 1.1.2.4
INSTRUMENTATIONService Water Pressure Indicator 3-3941-8A 11.3Reactor Local Level Instrumentation LI3-263-151A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-139A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-60A & B 1.1.1.3Reactor Local Level Instrumentation LI3-263-59A & B 1.1.1.3Fire Protection System Pressure Indicator PI2/3-4141-4A 11.3Condensate Storage Tank Level Indicator 2/3-3341-77A & B 8.2.5.ADiesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-4341-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-4341-25 18.7.2ISCO Makeup Pump Flow Indicator 2/3-4341-152 18.7.1
DRESDEN 2&3 AMENDMENT 19JUNE 2013
* Spurious operation concern only3.1-33
TABLE 3.1-7
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B1Equipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 3A-302-3 8.2.2.BControl Rod Drive Hydraulic Units 1.1.2.2*Electromatic Relief Valves 2-203-3B through E 1.2.2Isolation Condenser 2-1301 1.1.2.5.AIsolation Condenser Valve MO2-1301-1 1.2.2Isolation Condenser Valve MO2-1301-2 1.1.2.5.BIsolation Condenser Valve MO2-1301-3 1.1.2.5.CIsolation Condenser Valve MO2-1301-4 1.2.2Isolation Condenser Valve MO2-1301-10 1.1.2.5.AIsolation Condenser Valve MO2-4102 1.1.2.5.AIsolation Condenser Valve 2-1301-16 1.1.2.5.AIsolation Condenser Valve AO2-1301-17 1.1.2.5.AIsolation Condenser Valve AO2-1301-20 1.1.2.5.A*RWCU Valve MO2-1201-2 1.1.2.3*RWCU Valve MO2-1201-3 1.1.2.3*RWCU Valve PCV-2-1217 1.1.2.3Service Water Pump 3A-3901 11.3*Target Rock Valve 2-0203-3A 1.2.2Safety Valves 1.2.2Unit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124 A Outside*Main Steam Isolation Valve 2-203-1A 1.2.2*Main Steam Isolation Valve 2-203-1B 1.2.2*Main Steam Isolation Valve 2-203-1C 1.2.2*Main Steam Isolation Valve 2-203-1D 1.2.2*Main Steam Isolation Valve 2-203-2A 8.2.5.A*Main Steam Isolation Valve 2-203-2B 8.2.5.A*Main Steam Isolation Valve 2-203-2C 8.2.5.A*Main Steam Isolation Valve 2-203-2D 8.2.5.AService Water Cooling to CRD Pump Valve 3-3999-360 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-361 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-357 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-348 8.2.2.B
DRESDEN 2&3 AMENDMENT 13JUNE 2001
** If available, however not credited3.1-34
TABLE 3.1-7
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B1Equipment Location By Fire Zone
Service Water Cooling to CRD Pump Valve 3-3999-349 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-358 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-205 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-204 8.2.2.BCRD Discharge Valve MO3-0301-2A 8.2.2.BDrive Water Filter Inlet Valve 2-0301-9A 1.1.2.2Drive Water Filter Inlet Valve 2-0301-9B 1.1.2.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 2-1301-644 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-633 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-634 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-39 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-40 1.1.2.5.ACRD Cross-tie Valve 2/3-0301-162 8.2.6.CCRD Cross-tie Valve 2/3-0301-163 8.2.6.CIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank B 2/3-5215B 18.7.2Demineralized Water Tank T-105B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isolation Condenser Supply Isolation Valve MO2-4399-74 1.1.2.5.AISCO Makeup Room A Damper 2/3-57854A 18.7.1ISCO Makeup Room B Damper 2/3-57854B 18.7.2**DG Fuel Oil Transfer Pump 2-5203 9.0.A**DG Fuel Oil Storage Tank 2-5201 OutsideTBCCW Heat Exchanger Outlet Isolation Valves2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C3-3904-500 8.2.6.C
DRESDEN 2&3 AMENDMENT 13JUNE 2001
** If available, however not credited3.1-35
TABLE 3.1-7
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B1
Equipment Location By Fire Zone
Turbine Oil Cooler Outlet Isolation Valves2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENTDiesel Generator 2/3 9.0.CDG Cooling Water Pump 2/3-3903 11.3DG Vent Fan 2/3-5790 9.0.CDG Fuel Oil Transfer Pump 2/3-5203 9.0.C4-kV SWGR 33 8.2.6.E4-kV SWGR 33-1 1.1.1.34-kV SWGR 40 9.0.C480-V Bus 38 1.1.1.4480-V MCC 38-1 1.1.1.2480-V MCC 38-2 8.2.6.E480-V MCC 38-3 8.2.6.E125-Vdc Main Bus 3A-1 6.1125-Vdc Battery 3 7.0.B125-Vdc Battery Bus 3 6.1125-Vdc Main Bus 3A 8.2.6.E125-Vdc Distribution Panel 3 1.1.1.4Control Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2250 Vdc MCC3 6.1250 Vdc MCC2A 1.1.2.4250 Vdc MCC2B 1.1.2.4250 V Battery #3 7.0.BControl Panel 902-3 2.0Control Panel 923-1 2.0**480V MCC 29-2 8.2.5.A
DRESDEN 2&3 AMENDMENT 22JUNE 2019
** If available, however not credited3.1-36
TABLE 3.1-7
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH B1Equipment Location By Fire Zone
**480V Bus 291.1.2.4
INSTRUMENTATIONService Water Pressure Indicator 3-3941-8A 11.3Reactor Local Level Instrumentation LI2-263-151A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-139A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-60A & B 1.1.2.3Reactor Local Level Instrumentation LI2-263-59A & B 1.1.2.3Condensate Storage Tank Level Indicators 2/3-3341-77A & B 8.2.5.AFire Protection System pressure Indicator PI 2/3-4141-4A 11.3Diesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-4341-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-4341-25 18.7.2ISCO Makeup Pump Flow Indicator 2/3-4341-152Control Rod Drive Pump Suction GagePI 3-302-50 A(B)
18.7.18.2.2.B
DRESDEN 2&3 AMENDMENT14JUNE 2003
* Spurious operation concern only3.1-37
TABLE 3.1-8COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH C
Equipment Location ByFire Zone
MECHANICAL EQUIPMENT
Containment Cooling Service Water Pump 2C (2-1501-44C) 8.2.2.AContainment Cooling Service Water Pump 2D (2-1501-44D) 8.2.2.AContainment Cooling Service Water Pump Air Cooler 2C (2-5700-30C) 8.2.2.AContainment Cooling Service Water Pump Air Cooler 2D (2-5700-30D) 8.2.2.A*Electromatic Relief Valves MO2-203-3B through E 1.2.2* Safety Valves 1.2.1HPCI Pump and Turbine 2-2302/2-2301 11.2.3HPCI Auxiliary Oil Pump 2-2303-AOP 11.2.3HPCI Condensate Pump 2-2320-GSLO 11.2.3HPCI Condenser Air Exhaust Fan 2-2320-GSEF 11.2.3HPCI Cooling Water Pump 2-2301-57 11.2.3HPCI Emergency Air Cooler 2-5747 11.2.3HPCI Emergency Bearing Oil Pump 2-2303-EOP 11.2.3HPCI Oil Tank Heater2-2303-HTR 11.2.3HPCI Valve MO2-2301-10 11.2.3HPCI Valve MO2-2301-14 11.2.3HPCI Valve MO2-2301-15 11.2.3HPCI Valve MO2-2301-3 11.2.3HPCI Valve MO2-2301-35 11.2.3HPCI Valve MO2-2301-36 11.2.1HPCI Valve MO2-2301-4 1.2.2HPCI Valve MO2-2301-5 1.1.2.1HPCI Valve MO2-2301-6 11.2.3HPCI Valve MO2-2301-8 8.2.5.AHPCI Valve MO2-2301-9 11.2.3LPCI Pump 2C (2-1502-C) 11.2.1LPCI Pump 2D (2-1502-D) 11.2.1LPCI Emergency Air Cooler 2-5746B 11.2.1LPCI Valve MO2-1501-11B 11.2.1LPCI Valve MO2-1501-13B 1.1.2.1LPCI Valve MO2-1501-18B 1.1.2.1LPCI Valve MO2-1501-19B 1.1.2.1LPCI Valve MO2-1501-20BLPCI Valve MO2-1501-21B
1.1.2.11.1.2.2
LPCI Valve MO2-1501-32B 11.2.1LPCI Valve MO2-1501-38B 11.2.1
DRESDEN 2&3 AMENDMENT 13JUNE 2001
* Spurious operation concern only3.1-38
TABLE 3.1-8
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH C
EquipmentLocation ByFire Zone
LPCI Valve MO2-1501-3B 11.2.1LPCI Valve MO2-1501-5C 11.2.1LPCI Valve MO2-1501-5D 11.2.1*Target Rock Valve MO2-203-3A 1.2.2*Main Steam Isolation Valve 2-203-1A 1.2.2*Main Steam Isolation Valve 2-203-1B 1.2.2*Main Steam Isolation Valve 2-203-1C 1.2.2*Main Steam Isolation Valve 2-203-1D 1.2.2*Main Steam Isolation Valve 2-203-2A 8.2.5.A*Main Steam Isolation Valve 2-203-2B 8.2.5.A*Main Steam Isolation Valve 2-203-2C 8.2.5.A*Main Steam Isolation Valve 2-203-2D 8.2.5.A
ELECTRICAL EQUIPMENTDiesel Generator 2 9.0.ADG Cooling Water Pump 2-3903 11.3DG Vent Fan 2-5790 9.0.ADG Fuel Oil Transfer Pump 2-5203 9.0.A4-kV SWGR 24 8.2.6.A4-kV SWGR 24-1 1.1.2.3480-V Bus 29 1.1.2.4480-V MCC 29-1 1.1.2.2480-V MCC 29-2 8.2.5.A480-V MCC 29-4 1.1.2.2480-V MCC 29-7 1.1.2.2250-Vdc Battery 3 7.0.B250-Vdc Turbine Building MCC 3 6.1250-Vdc MCC 2A 1.1.2.4250-Vdc MCC 2B 1.1.2.4125-Vdc Battery 3 7.0.B125-Vdc Battery Bus 2 6.1125-Vdc Main Bus 3A 8.2.6.E125-Vdc Reserve Bus 2 7.0.A125-Vdc Reserve 2B 7.0.A125-Vdc Reserve 2B-1 7.0.A
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-39
TABLE 3.1-8
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH C
EquipmentLocation ByFire Zone
120/240-V Essential Service Distribution Panel 902-49 6.2120/240-V Instrument Bus 902-50 6.2
INSTRUMENTATIONReactor Local Level Instrumentation LI2-263-59A & B 1.1.2.3Reactor Local Pressure Instrumentation PI2-263-60A & B 1.1.2.3Reactor Local Level Instrumentation LI 2-263-151A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-139A & B 1.1.2.2
DRESDEN 2&3 AMENDMENT 14JUNE 2003
* Spurious operation concern only3.1-40
TABLE 3.1-9
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH D
EquipmentLocation By Fire Zone
MECHANICAL EQUIPMENTContainment Cooling Service Water Pump 3C (3-1501-44C) 8.2.2.BContainment Cooling Service Water Pump 3D (3-1501-44D) 8.2.2.BContainment Cooling Service Water Pump Air Cooler 3C (3-5700-30C) 8.2.2.BContainment Cooling Service Water Pump Air Cooler 3D (3-5700-30D) 8.2.2.B*Electromatic Relief Valves MO3-203-3B through E 1.2.1*Target Rock Valve 3-203-3A 1.2.1Safety Valves 1.2.1HPCI Pump and Turbine 3-2302/3-2301 11.1.3HPCI Auxiliary Oil Pump 3-2303-AOP 11.1.3HPCI Condensate Pump 3-2320-GSLO 11.1.3HPCI Condenser Air Exhaust Fan 3-2320-GSEF 11.1.3HPCI Cooling Water Pump 3-2301-57 11.1.3HPCI Emergency Air Cooler 3-5747 11.1.3HPCI Emergency Bearing Oil Pump 3-2303-EOP 11.1.3HPCI Oil Tank Heater 3-2303-HTR 11.1.3HPCI Valve MO3-2301-10 11.1.3HPCI Valve MO3-2301-14 11.1.3HPCI Valve MO3-2301-15 11.1.3HPCI Valve MO3-2301-3 11.1.3HPCI Valve MO3-2301-35 11.1.3HPCI Valve MO3-2301-36 1.1.1.1HPCI Valve MO3-2301-4 1.2.1HPCI Valve MO3-2301-5 1.1.1.1HPCI Valve MO3-2301-6 11.1.3HPCI Valve MO3-2301-8 8.2.5.EHPCI Valve MO3-2301-9 11.1.3LPCI Pump 3C 3-1502-C 11.1.1LPCI Pump 3D 3-1502-D 11.1.1LPCI Emergency Air Cooler 3-5746B 11.1.1LPCI Valve MO3-1501-11B 11.1.1LPCI Valve MO3-1501-13B 1.1.1.1LPCI Valve MO3-1501-18B 1.1.1.1LPCI Valve MO3-1501-19B 1.1.1.1LPCI Valve MO3-1501-20BLPCI Valve MO3-1501-21B
1.1.1.11.1.1.2
DRESDEN 2&3 AMENDMENT 16JUNE 2007
* Spurious operation concern only3.1-41
TABLE 3.1-9
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH D
EquipmentLocation By Fire Zone
LPCI Valve MO3-1501-32BLPCI Valve MO3-1501-38B
11.1.11.1.1.1
LPCI Valve MO3-1501-3B 11.1.1LPCI Valve MO3-1501-5C 11.1.1LPCI Valve MO3-1501-5D 11.1.1*Main Steam Isolation Valve 3-203-1A 1.2.1*Main Steam Isolation Valve 3-203-1B 1.2.1*Main Steam Isolation Valve 3-203-1C 1.2.1*Main Steam Isolation Valve 3-203-1D 1.2.1*Main Steam Isolation Valve 3-203-2A 8.2.5.E*Main Steam Isolation Valve 3-203-2B 8.2.5.E*Main Steam Isolation Valve 3-203-2C 8.2.5.E*Main Steam Isolation Valve 3-203-2D 8.2.5.E
ELECTRICAL EQUIPMENTDiesel Generator 3 9.0.BDG Cooling Water Pump 3-3903 11.3DG Vent Fan 3-5790 9.0.BDG Fuel Oil Transfer Pump 3-5203 9.0.B4-kV SWGR 34 8.2.6.E4-kV SWGR 34-1 1.1.1.3480-V Bus 39 1.1.1.4480-V MCC 39-1 1.1.1.2 480-V MCC 39-2 8.2.6.C 480-V MCC 39-7 1.1.1.2 250-Vdc Battery 2 7.0.A250-Vdc Turbine Building MCC 2 7.0.A250-Vdc MCC 3A 1.1.1.4250-Vdc MCC 3B 1.1.1.4125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 6.1125-Vdc Main Bus 2A-1 7.0.A125-Vdc Reserve Bus 3B-1 6.1125-Vdc Reserve 3A 8.2.6.E125-Vdc Reserve Bus 3B 6.1125-Vdc Distribution Panel 3 1.1.1.4
DRESDEN 2&3 AMENDMENT 22JUNE 2019
* Spurious operation concern only3.1-42
TABLE 3.1-9
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH D
ELECTRICAL EQUIPMENT
120/240-V Instrument Bus 903-50 6.2 120-240-V Essential Service Distribution Panel 903-49 6.2
EquipmentLocation By Fire Zone
INSTRUMENTATIONReactor Local Level Instrumentation LI3-263-59A & B 1.1.1.3Reactor Local Pressure Instrumentation PI3-263-60A & B 1.1.1.3
DRESDEN 2&3 AMENDMENT 19JUNE 2013
*Spurious operation concern only3.1-43
TABLE 3.1-10
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH EEquipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 2B-302-3 8.2.2.AControl Rod Drive Hydraulic Units 1.1.2.2*Electromatic Relief Valves 2-203-3B through E 1.2.2Isolation Condenser 2-1302 1.1.2.5.AIsolation Condenser Valve MO2-1301-1 1.2.2Isolation Condenser Valve MO2-1301-2 1.1.2.5.BIsolation Condenser Valve MO2-1301-3 1.1.2.5.CIsolation Condenser Valve MO2-1301-4 1.2.2Isolation Condenser Valve MO2-1301-10 1.1.2.5.AIsolation Condenser Valve MO2-4102 1.1.2.5.AIsolation Condenser Valve 2-1301-16 1.1.2.5.AIsolation Condenser Valve AO2-1301-17 1.1.2.5.AIsolation Condenser Valve AO2-1301-20 1.1.2.5.AService Water Pump 2B-3901 11.3*Target Rock Valve 2-203-3A 1.2.2Safety Valves 1.2.2*Main Steam Isolation Valve 2-203-1A 1.2.2*Main Steam Isolation Valve 2-203-1B 1.2.2*Main Steam Isolation Valve 2-203-1C 1.2.2*Main Steam Isolation Valve 2-203-1D 1.2.2*Main Steam Isolation Valve 2-203-2A 8.2.5.A*Main Steam Isolation Valve 2-203-2B 8.2.5.A*Main Steam Isolation Valve 2-203-2C 8.2.5.A*Main Steam Isolation Valve 2-203-2D 8.2.5.AService Water Cooling to CRD Pump Valve 2-3999-360 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-361 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-357 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-348 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-349 8.2.2.AService Water Cooling to CRD Pump Valve 2-3999-358 8.2.2.ATBCCW Cooling to CRD Pumps 2-3899-205 8.2.2.ATBCCW Cooling to CRD Pumps 2-3899-204 8.2.2.ACRD Discharge Valve MO2-0301-2B 8.2.2.A
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-44
TABLE 3.1-10
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH EEquipment Location By Fire Zone
Drive Water Filter Inlet Valve 2-0301-9A 1.1.2.2Drive Water Filter Inlet Valve 2-0301-9B 1.1.2.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 2-1301-644 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-633 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-634 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-39 1.1.2.5.AIsolation Condenser Sightglass Isolation Valves 2-1301-40 1.1.2.5.AIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank A 2/3-5215B 18.7.2Demineralizer Water Tank T 105-B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isocondenser Supply Isolation Valve MO2-4399-74 1.1.2.5.AISCO Makeup Pump Room A Damper 2/3-57854A 18.7.1ISCO Makeup Pump Room A Damper 2/3-57854B 18.7.2DG Fuel Oil Transfer Pump 2-5203 9.0.ADG Fuel Oil Transfer Pump 2-5201 OutsideUnit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124A OutsideTBCCW Heat Exchanger Outlet Isolation Valves2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C3-3904-500 8.2.6.CTurbine Oil Cooler Outlet Isolation Valves2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C3-3906-501 8.2.6.CConcentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.1-45
TABLE 3.1-10
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH EEquipment Location By Fire Zone
ELECTRICAL EQUIPMENTDiesel Generator 2 9.0.ADG Cooling Water Pump 2-3903 11.3DG Vent Fan 2-5790 9.0.ADG Fuel Oil Transfer Pump 2-5203 9.0.A4-kV SWGR 24 8.2.6.A4-kV SWGR 24-1 1.1.2.3480-V Bus 28 1.1.2.4480-V Bus 29 1.1.2.4480-V MCC 28-1 1.1.2.2480-V MCC 29-2 8.2.5.A250-Vdc Battery 3 7.0.B250-Vdc Turbine Building MCC 3 6.1250-Vdc MCC 2A 1.1.2.4250-Vdc MCC 2B 1.1.2.4125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 7.0.A125-Vdc Battery 3 7.0.B125-Vdc Battery Bus 3 6.1125-Vdc Main Bus 2A-1 7.0.A125-Vdc Reserve Bus 2B 7.0.A125-Vdc Bus 2B-1 7.0.A125-Vdc Main Bus 3A 8.2.6.E125-Vdc Reserve Bus 2 7.0.A125-Vdc Distribution Panel 2 1.1.2.4Control Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2Control Panel 902-3 2.0Control Panel 923-1 2.0
INSTRUMENTATIONService Water Pressure Indicator 2-3941-8A 11.3Reactor Local Level Instrumentation LI2-263-151A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-139A & B 1.1.2.2Reactor Local Pressure Instrumentation PI2-263-60A & B 1.1.2.3Reactor Local Level Instrumentation LI2-263-59A & B 1.1.2.3Condensate Storage Tank Level Indicators 2/3-3341-77A and B 8.2.5.ADiesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-46
TABLE 3.1-10
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH EEquipment Location By Fire Zone
Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-5241-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-5241-25 18.7.2ISCO Makeup Pump Flow indicator 2/3-4341-152 18.7.1Fire Protection System Pressure Indicator PI 2/3-4141-4A 11.3
DRESDEN 2&3 AMENDMENT 19JUNE 2013
* Spurious operation concern only3.1-47
TABLE 3.1-11
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH FEquipment Location By Fire Zone
MECHANICAL EQUIPMENTControl Rod Drive Pump 3B-302-3 8.2.2.BControl Rod Drive Hydraulic Units 1.1.1.2*Electromatic Relief Valves 3-203-3B through E 1.2.1Isolation Condenser 3-1302 1.1.1.5.AIsolation Condenser Valve MO3-1301-1 1.2.1Isolation Condenser Valve MO3-1301-2 1.1.1.5.BIsolation Condenser Valve MO3-1301-3 1.1.1.5.CIsolation Condenser Valve MO3-1301-4 1.2.1Isolation Condenser Valve MO3-1301-10 1.1.1.5.AIsolation Condenser Valve MO3-4102 1.1.1.5.AIsolation Condenser Valve 3-1301-16 1.1.1.5.AIsolation Condenser Valve AO3-1301-17 1.1.1.5.AIsolation Condenser Valve AO3-1301-20 1.1.1.5.AService Water Pump 3B-3901 11.3*Target Rock Valve 3-203-3A 1.2.1Safety Valves 1.2.1*Main Steam Isolation Valve 3-203-1A 1.2.1*Main Steam Isolation Valve 3-203-1B 1.2.1*Main Steam Isolation Valve 3-203-1C 1.2.1*Main Steam Isolation Valve 3-203-1D 1.2.1*Main Steam Isolation Valve 3-203-2A 8.2.5.E*Main Steam Isolation Valve 3-203-2B 8.2.5.E*Main Steam Isolation Valve 3-203-2C 8.2.5.E*Main Steam Isolation Valve 3-203-2D 8.2.5.EService Water Cooling to CRD Pump Valve 3-3999-360 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-361 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-357 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-348 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-349 8.2.2.BService Water Cooling to CRD Pump Valve 3-3999-358 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-205 8.2.2.BTBCCW Cooling to CRD Pumps 3-3899-204 8.2.2.BCRD Discharge Valve MO3-0301-2B 8.2.2.B
DRESDEN 2&3 AMENDMENT 13JUNE 2001
** If available, however not credited3.1-48
TABLE 3.1-11
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH FEquipment Location By Fire Zone
Drive Water Filter Inlet Valve 3-0301-9A 1.1.2.2Drive Water Filter Inlet Valve 3-0301-9B 1.1.2.2Condensate Storage Tank Discharge Valves 2/3-3346-500 OutsideCondensate Storage Tank Discharge Valves 2/3-3327-A-500 OutsideCondensate Storage Tank Discharge Valves 2/3-2301-12 OutsideService Water Connection to Fire System 2-3906 11.3Isolation Condenser Sightglass 3-1301-644 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-202 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1300-203 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-39 1.1.1.5.AIsolation Condenser Sightglass Isolation Valves 3-1301-40 1.1.1.5.AIsolation Condenser Makeup Pump 2/3-43122A 18.7.1Isolation Condenser Makeup Pump 2/3-43122B 18.7.2Diesel Oil Day Tank A 2/3-5215A 18.7.1Diesel Oil Day Tank A 2/3-5215B 18.7.2Demineralizer Water Tank T 105-B OutsideIsolation Condenser Makeup Pump Driver 2/3-43123A 18.7.1Isolation Condenser Makeup Pump Driver 2/3-43123B 18.7.2Isocondenser Supply Isolation Valve MO2-4399-74 1.1.2.5.AISCO Makeup Pump Room A Damper 2/3-57854A 18.7.1ISCO Makeup Pump Room A Damper 2/3-57854B 18.7.2**DG Fuel Oil Transfer Pump 2-5203 9.0.A**DG Fuel Oil Transfer Pump 2-5201 OutsideUnit 2/3 Diesel Fire Pump 2/3-4102 11.3Unit 1 Fire Pump K124 OutsideTBCCW Heat Exchanger Outlet Isolation Valve2-3904-501 8.2.6.C3-3904-501 8.2.6.C2-3904-500 8.2.6.C3-3904-500 8.2.6.CTurbine Oil Cooler Outlet Isolation Valve2-3906-500 8.2.6.C3-3906-500 8.2.6.C2-3906-501 8.2.6.C3-3906-501 8.2.6.C
DRESDEN 2&3 AMENDMENT 13JUNE 2001
* If available, however not credited3.1-49
TABLE 3.1-11
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH FEquipment Location By Fire Zone
Concentrator Condenser Outlet Isolation Valves2/3-3999-241 8.2.6.C2/3-3999-240 8.2.6.C
ELECTRICAL EQUIPMENTDiesel Generator 3 9.0.BDG Cooling Water Pump 3-3903 11.3DG Vent Fan 3-5790 9.0.BDG Fuel Oil Transfer Pump 3-5203 9.0.B4-kV SWGR 34 8.2.6.E4-kV SWGR 34-1 1.1.1.3480-V Bus 38 1.1.1.4480-V Bus 39 1.1.1.4480-V MCC 38-1 1.1.1.2480-V MCC 39-2 8.2.6.C250-Vdc Battery 2 7.0.A250-Vdc Turbine Building MCC 2 7.0.A250-Vdc MCC 3A 1.1.1.4250-Vdc MCC 3B 1.1.1.4125-Vdc Battery 2 7.0.A125-Vdc Battery Bus 2 7.0.A125-Vdc Battery 3 7.0.B125-Vdc Battery Bus 3 6.1125-Vdc Main Bus 2A-1 7.0.A125-Vdc Reserve Bus 3B 6.1125-Vdc Reserve Bus 3B-1 6.1125-Vdc Main Bus 3A 8.2.6.E125-Vdc Distribution Panel 3 1.1.1.4Control Panel 2223-126A 18.7.1Control Panel 2223-126B 18.7.2Control Panel 902-3 2.0Control Panel 923-1 2.0**480V MCC 29-2 8.2.5.A**480V Bus 29 1.1.2.4250Vdc MCC 3A 1.1.1.4250Vdc MCC 3B 1.1.1.4250Vdc MCC 2 7.0.A
DRESDEN 2&3 AMENDMENT 22JUNE 2019
3.1-50
TABLE 3.1-11
COMPONENTS REQUIRED FOR ALTERNATIVE SHUTDOWN PATH FEquipment Location By Fire Zone
250 V Battery #2 7.0.A
INSTRUMENTATIONService Water Pressure Indicator 3-3941-8B 11.3Reactor Local Level Instrumentation LI3-263-151A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-139A & B 1.1.1.2Reactor Local Pressure Instrumentation PI3-263-60A & B 1.1.1.3Reactor Local Level Instrumentation LI3-263-59A & B 1.1.1.3Condensate Storage Tank Level Indicators 2/3-3341-77A and B 8.2.5.ADiesel Day Tank A Level Indicator 2/3-5241-22 18.7.1Diesel Day Tank B Level Indicator 2/3-5241-24 18.7.2Clean Demineralizer Tank Drain Valve 2/3-4399-193 and pressure gauge
Outside
Diesel Day Tank A Level Transmitter 2/3-5241-23 18.7.1Diesel Day Tank B Level Transmitter 2/3-5241-25 18.7.2ISCO Makeup Pump Flow indicator 2/3-4341-152 18.7.1Fire Protection System Pressure Indicator PI 2/3-4141-4A
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-1
3.2 Description of Methods to Achieve and Maintain Cold Shutdown
Cold shutdown is defined in the Dresden Technical Specifications as that condition in which the reactor mode switch is in the shutdown position, no core alterations are being performed, and the reactor coolant temperature is equal to or less than 212∀F. This analysis considers those systems and components necessary to bring the reactor from hot shutdown to cold shutdown and to maintain the cold shutdown condition.
Three different cold shutdown trains are available at Dresden 2&3. These trains are shown below:
1. Shutdown Cooling- Shutdown Cooling System- RBCCW- Service Water
2. LPCI/CCSW Division I3. LPCI/CCSW Division II
Of these, the shutdown cooling path is the normal path used by the station. This path was preferred and utilized in this analysis wherever possible. The use of LPCI as a backup to the shutdown cooling system for achieving and maintaining cold shutdown was addressed by the NRC in the SEP Review of Safe Shutdown Systems. It was also proposed as an alternative in Dresden 2&3, Fire Protection Safe Shutdown Analysis Supplement 1, Cold Shutdown Analysis, January 1980 (F.P.P.D.P. Historical Volume). No advantage with regard to cable separation was gained from analyzing the availability of both LPCI/CCSW Divisions. Therefore, because LPCI/CCSW Division II was also analyzed for hot shutdown, it was chosen. Each of these two methods is described in this section.
The cold shutdown procedures are a continuation of the process of bringing the reactor from an operating status to safe shutdown. Since cold shutdown follows hot shutdown, reactivity control will not be addressed. Reactor coolant level is maintained above the core by both of the shutdown systems employed at the Dresden Station by injecting water into the RPV. Only the following items will be discussed for each of the cold shutdown methods:
1. Reactor Pressure Control and Decay Heat Removal
2. Suppression Pool Cooling
3. Process Monitoring Instrumentation
4. Support Functions
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-2
3.2.1 Shutdown Cooling Method
3.2.1.1 Reactor Pressure Control and Decay Heat Removal
The shutdown cooling system would be started as soon as the reactor coolant system has been sufficiently cooled (T<350∀F) and depressurized. Depressurization can be achieved by the main condenser through the turbine bypass valves, isolation condenser, HPCI or the electromatic relief valves. A system sketch of the Shutdown Cooling System (SDCS) is shown in Figure 3.2-1. All mechanical equipment associated with this method of shutdown is identified in Table 3.2-1. The SDCS design was based upon decreasing reactor coolant system temperatures to 125∀F within 24 hours after reactor shutdown. The system consists of three partial-capacity loops. FSAR Subsection 10.4.2 states that all three are necessary to perform the cooling function. However, plant operating experience has shown that at only eight hours after normal (main condenser) shutdown commencement, when the SDCS would normally be put into service and after reactor coolant system temperature has decreased to 350∀F, only one pump and one heat exchanger (comprising one loop) are necessary to cool down. Thus, there is substantial excess capacity.
As seen in Figure 3.2-1, the SDCS pumps take suction from the reactor recirculation loops through motor-operated valves 1001-1A and 1001-1B. These valves are inside containment. They are ac-powered from 480-Volt ac MCC 28-1 (38-1) which can be supplied from the emergency diesel generators. They are closed until initiation requirements (reactor coolant system temperature less than 350∀F) are met and operator action is taken.
The two inlet lines join in one header outside of containment. This header feeds three separate loops. Each loop has a dc-powered motor-operated pump inlet isolation valve (1001-2A, 1001-2B or 1001-2C), a centrifugal pump rated at 6,750 gpm at "full operation", a heat exchanger, and a dc-powered motor-operated pump outlet isolation valve (1001-4A, 1001-4B or 1001-4C). Downstream of the pump outlet isolation valves, and still outside containment, the three branches again feed a common header. This common header divides into two return lines, each containing an ac-powered motor-operated isolation valve (1001-5A and 1001-5B). Each return line penetrates the containment and rejoins the reactor coolant system through connections into one division of the Low Pressure Coolant Injection (LPCI) system. Each LPCI division connects to one of the reactor recirculation loops. Although the capability exists to permit flow from and to both recirculation loops simultaneously, normally only one loop is selected for such service. Either recirculation loop valve(s) 0202-5A(B) or 0202-4A(B) must be closed to prevent back flow through the reactor recirculating pump.
The SDCS cannot normally be put into service until various interlocks are met. The first of these is a temperature interlock on all four ac-powered isolation valves (1001-1A and 1001-1B and 1001-5A and 1001-5B), which will not allow their opening until reactor coolant system temperature, sensed on both recirculation loops, has decreased to less than 350∀F. The dc suction valves (1001-2A, 1001-2B, 1001-2C) will also shut to isolate the SDCS (with check valves on the discharge side), if system temperature, again sensed on the recirculation loops, increases to 350∀F. Additionally, each pump has interlocks to prevent operation until the following conditionsare met: 1) Inlet temperature, as measured in its branch line, must be less than 350∀F, and 2) pump suction pressure must be greater than 4 psig. If these conditions are not met, then
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-3
The SDCS pumps cannot be started. Also, the pumps will trip upon temperature increase to 350∀For if suction pressure decreases to less than 4 psig. The system also isolates on a Group III signal, + 8 reactor water level.
Power to the ac-isolation valves (1001-1A(B) and 1001-5A(B)) is provided from 480-Volt MCC 28-1 (38-1), and to the pumps from 4-kV buses 23-1 (33-1) (Pumps 2A (3A) and 2C (3C)) and 24-1 (34-1) (Pump 2B (3B)). Each of these is capable of being supplied from the emergency dieselgenerators. DC power to the three branch suction isolation valves, 1001-2A, 1001-2B, and 1001-2C and the 1001-4A and 1001-4B branch discharge isolation valves is obtained from 250-Volt DCReactor Building MCC 2 (3), (Bus 2A (3A)). Power for the remaining dc discharge valve 1001-4C is supplied from 250-Volt DC Reactor Building MCC 2 (3) (Bus 2B (3B)).
Recirculation loop valves MO2 (3)-0202-4A and MO2 (3)-0202-5A are fed from MCC 28-7(38-7). Valves MO2 (3)-0202-4B and MO2 (3)-0202-5B are fed from MCC 29-7(39-7).
The heat exchangers of the SDCS are cooled by water from the Reactor Building Closed Cooling Water (RBCCW) system. The heat exchangers of the RBCCW are in turn cooled by the SW system (see Subsection 3.2.1.4). The RBCCW system sketch is shown on Figure 3.2-2.
3.2.1.2 Suppression Pool Cooling
The shutdown cooling method of bringing the reactor to cold shutdown does not employ the suppression pool as a heat sink. Therefore, no pool cooling is needed during this phase of safe shutdown.
3.2.1.3 Process Monitoring Instrumentation
3.2.1.3.1 Reactor Water Level and Pressure
Reactor level and pressure are normally monitored in the control room on various instruments, which are fed from two independent divisions. The operator can also locally monitor reactor level and pressure in the Reactor Building on instrument racks 2202(3)-5 and 2202(3)-6 at the 546-foot elevation or 2202(3)-7 and 2202(3)-8 at the 517-foot elevation. Reactor pressure is used to determine the saturation temperature in the vessel. When the vessel pressure is reduced, a meter will be attached to a drywell penetration to measure the recirculation loop (A+B) temperature, vessel shell temperature and shell flange temperature if control room indication is unavailable.
3.2.1.3.2 Suppression Pool Level and Temperature
Suppression pool level and temperature are not necessary for the shutdown cooling method of cold shutdown because the suppression pool is not employed as a heat sink for this method of cold shutdown.
3.2.1.3.3 Diagnostic Instrumentation for Shutdown Systems
Local mechanical discharge pressure indication is provided for the shutdown cooling pumps, RBCCW pumps, and service water pumps.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-4
3.2.1.4 Support Functions
The major mechanical auxiliary systems to the shutdown cooling system are the RBCCW and service water systems. Each of the three RBCCW pumps will deliver 8,800 gpm (FSAR Section 10.10). Although the SAR states that two pumps (and heat exchangers) are needed for the cooldown and shutdown modes of operation, plant experience has shown that only one pump and heat exchanger combination is necessary in the assumed scenario. Any combination of one pump with one heat exchanger is possible because of the piping and valving arrangement and any of the loads to be cooled can be isolated, when feasible and necessary, to increase cooling to essential heat loads.
The RBCCW path to the shutdown cooling system heat exchangers begins at the discharge of the three RBCCW pumps which are in parallel branches. Pump 2A (3A) is powered from the 4-kV ac Bus 23-1 (33-1) while pumps 2/3 (not credited) and 2B (3B) receive power from the 4-kV ac bus 24-1 (34-1). These buses can be supplied from the emergency diesel generator. Pump 2/3 is unique in that its discharge can also be routed (through a normally locked-closed valve) to provide cooling to the RBCCW system of Dresden 3 (which has only two pumps and two heat exchangers).
The three pump discharge lines join into a header which feeds all of the components to be cooled (other than SDCS heat exchangers, this includes the drywell coolers, the SDCS pumps, fuel pool heat exchangers, non-regenerative heat exchangers of the reactor water cleanup system, and various other loads). There is an ac-powered motor-operated isolation valve (3704) on the discharge of the SDCS heat exchangers. This valve is supplied power from MCC 29-1 (39-1) which can be fed from the diesel generator. It also is accessible for manual operation if necessary.
Flow to cool the SDCS pumps is routed through a normally-open ac powered motor-operated inlet isolation valve (3701) which also serves to allow flow to or isolate flow from other loads to be cooled. This valve is supplied power from MCC 28-1 (38-1) and is also accessible for manual operation.
Discharge of RBCCW from the cooled components is routed to one header, which feeds the three RBCCW heat exchangers. The cooled heat exchanger effluent (service water is the cooling medium) feeds a single header from which the RBCCW pumps draw suction.
The RBCCW system pressure is lower than that of both the components being cooled and the service water-cooling medium, meaning that any intersystem leakage at the heat exchangers would be leakage into the RBCCW system. This prevents radioactive material from the cooled components from escaping to the environment through the ultimate cooling medium. It also prevents impurities in the cooling medium from entering the reactor coolant system.
As noted above, the RBCCW system is cooled by the service water (SW) system. The SW system sketch is shown in Figure 3.2-3. This system has five pumps, two of which are powered from Dresden 2 buses, two from Dresden 3 buses, and one from both Dresden 2 and 3 buses. All five pumps, with operator action, can be supplied power from the emergency diesel generators. Pump 2A (3A) is powered from bus 23 (33), Pump 2B (3B) from bus 24 (34), and Pump 2/3
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-5
from either bus 24 or bus 34. All five pumps are located in the Crib House and are rated at 15,000 gpm each. A common header connects the Dresden 2 and Dresden 3 systems. All valves in the service water piping which lead to or from the RBCCW heat exchangers are manual with the exception of air-operated temperature control valves on each heat exchanger. These valves fail open on loss of air.
The power distribution equipment necessary to support the shutdown cooling systems and its auxiliaries is shown on Figure 3.2-4 and listed on Table 3.2-2. The load calculation (Table 3.2-3) using FSAR load data shows that one diesel per unit is needed for achieving cold shutdown. It is conservatively assumed for the purpose of this load analysis that two shutdown cooling pumps, two RBCCW pumps, and one service water pump are necessary to achieve and maintain cold shutdown for one unit. As noted in Subsection 3.2.1.1, station operating experience has shown that only one pump is necessary.
While achieving and maintaining cold shutdown was not considered in the design basis of the diesel generators as described in FSAR Table 8.2.2, Table 3.2-3 shows that the diesel generators have adequate capacity available to carry the shutdown system loads.
Each diesel generator is supported by the following auxiliaries (see Figure 3.1-6):
1. Diesel generator fuel transfer pump2. Diesel generator room ventilation fan3. Diesel generator cooling water pump
Each diesel generator is supplied from a 750-gallon day tank which in turn is supplied from a 15,000-gallon fuel oil tank. The technical specifications require a minimum of 10,000 gallons of diesel fuel supply on site for each diesel. The diesel fuel supply of 10,000 gallons will supply each diesel generator with a minimum of two days of full load operation or about four days at ½ load. Additional diesel fuel can be obtained and delivered to the site within an 8-hour period (Technical Specifications, Page B3/4.9-8).
3.2.2 LPCI/CCSW Division II Method
3.2.2.1 Reactor Pressure Control and Decay Heat Removal
If the SDCS was inoperable for any reason (valve failure, damage to SDCS pumps, failure of RBCCW or SW), the Low Pressure Coolant Injection (LPCI) system could be used to inject cooling water into the core once the injection initiation limits (350 psig) are met. The LPCI/CCSW system sketch is shown on Figure 3.2-5 Sheets 1 and 2. The mechanical equipment necessary to maintain and achieve shutdown by this method is given in Table 3.2-4. These systems are low pressure, high volume systems capable of providing substantial volumes of cooling water to the core. Not too much detail will be devoted to the individual systems here because each is safety-grade and is taken into account in the Dresden 2&3 SAR Loss-of-Coolant Accident (LOCA) Analysis, Chapter 6. The pumps in each system are powered from "emergency" buses, all motor-operated valves inside containment are powered from "emergency" MCCs and all valves outside containment are accessible for manual operation.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-6
Reactor vessel pressure will be reduced by opening the electromatic relief valves allowing steam to flow to the pressure suppression chamber (torus) where it will be quenched. The LPCI system will be throttled to maintain reactor vessel level between +8 and +40 inches as measured from instrument zero. LPCI Division II will be used to inject water into the reactor from the torus via the "B" recirculation loop.
As the core cools (decay heat decreases), a path will be established which will allow reactor vessel water to flow to the torus. Water will flow out the `A' recirculation loop, through the inoperative shutdown cooling system by opening the normally closed isolation valve.
The output of the shutdown cooling system will be directed into the LPCI Division I piping. LPCI valves will be aligned to allow the water to backflow into the LPCI test line, which discharges into the torus.
The electromatic relief valves will remain energized to assure that vessel pressure will not increase more than 2 psi above the drywell pressure.
3.2.2.2 Suppression Pool Cooling
The suppression pool water is pumped through the containment cooling heat exchangers. After cooling, the water is injected into the reactor vessel.
The containment cooling service water system (CCSW) provides cooling water to the tube side of the CCSW heat exchangers (see Figure 3.2-5). The CCSW is an open cycle system with the pumps taking suction from the Crib House. The water is pumped through the heat exchanger and then discharged to the 48-inch service water discharge header.
Pumps C&D are fed from bus 24 (34). Bus 24 (34) can be fed by the diesel generators. All valves are outside containment and are accessible for manual operation if necessary. The CCSW pump room coolers for pump C recycle water from the CCSW pump discharge piping through the pump room cooler coils to the pump suction piping. A blower circulates room air through the cooling coils. Blowers C and D are fed from MCC 29-2 (39-2). Pump D does not have an associated room cooler.
3.2.2.3 Process Monitoring Instrumentation
3.2.2.3.1 Reactor Level and Pressure
Reactor level and pressure are normally monitored in the control room on various instruments which are fed from two independent divisions. The operator can also locally monitor reactor level and pressure in the Reactor Building on instrument racks 2202(3)-5 and 2202 (3)-6 at the 546-foot elevation or 2202(3)-7 and 2202(3)-8 at the 517-foot elevation. Reactor pressure is used to determine the saturation temperature in the vessel. When the vessel pressure is reduced, a meter will be attached to a drywell penetration to measure the recirculation loop temperature, vessel shell temperature and shell flange temperature if control room indication is unavailable.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-7
3.2.2.3.2 Suppression Pool Level and Temperature
Suppression pool temperature and level indication are available in the control room. Local level indication is available in the LPCI Division II corner rooms. Torus water temperature can be determined locally by taking the temperature of a grab sample or by using a surface pyrometer on the torus bottom.
3.2.2.3.3 Diagnostic Instrumentation for Shutdown Systems
Local mechanical discharge pressure indication is provided for the LPCI and CCSW pumps.
3.2.2.4 Support Systems
The following support systems are necessary for operation of the LPCI/CCSW system to achieve and maintain cold shutdown:
1. LPCI and CCSW Room Coolers2. Auxiliary Power.
The LPCI and CCSW room cooler fans are fed from a 480-V MCC which is capable of being powered by the emergency diesel generator. Water is provided to the LPCI room cooler from the containment cooling service water or service water pumps. Water for the CCSW room cooler is taken from the pump discharge and routed through the cooler to the pump suction as shown on Figure 3.2-5.
The electrical system to support the LPCI/CCSW system is shown on Figure 3.2-4 and listed in Table 3.2-5. The load calculations using FSAR load data show that one diesel generator per unit is needed to achieve cold shutdown. It is conservatively assumed for the purpose of this analysis that a full train of LPCI and CCSW pumps (i.e., two LPCI pumps and two CCSW pumps) are necessary to achieve and maintain cold shutdown.
Achieving and maintaining cold shutdown was not considered in the design basis of the diesel generator as described in the FSAR Table 8.2-2. However, Table 3.2-6 shows that adequate capacity is available using the diesel generator.
The loading for 2-LPCI-2-CCSW Pumps situation is similar to that calculated for an accident situation in FSAR Table 8.2-1. Each diesel generator is designed for 2,600 kW at 0.8 power factor. Normal loss of offsite power loads also include four drywell cooling blowers (300 bhp total), the RBCCW system (300 bhp), and a service water pump (1,000 bhp). These loads can be added to the diesel generator without exceeding the design capability but only after the residual heat load has been reduced to where one LPCI pump and one CCSW pump are adequate.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-8
Each diesel generator is supported by the following auxiliaries (see Figure 3.1-6):
1. Diesel generator fuel transfer pump2. Diesel generator room ventilation fan3. Diesel generator cooling water pump
Each diesel generator is supplied from a 750-gallon day tank which in turn is supplied from a 15,000-gallon fuel oil tank. The technical specifications require a minimum of 10,000 gallons of diesel fuel supply on site for each diesel. The diesel fuel supply of 10,000 gallons will supply each diesel generator with a minimum of two days of full load operation or about four days at ½ load. Additional diesel fuel can be obtained and delivered to the site within an 8-hour period (Technical Specifications, Page B3/4.9-8).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-9
TABLE 3.2-1
SHUTDOWN COOLING METHOD - COLD SHUTDOWN EQUIPMENT
I. Primary Loop Active Mechanical Components
A. Shutdown Cooling Pumps
2A-1002 3A-10022B-1002 3B-10022C-1002 3C-1002
B. Valves Outside Containment
1. Shutdown Cooling Pump Suction Valves
MO2-1001-2A (N.C.) MO3-1001-2A (N.C.)MO2-1001-2B (N.C.) MO3-1001-2B (N.C.)MO2-1001-2C (N.C.) MO3-1001-2C (N.C.)
2. Shutdown Cooling Pump Discharge Valves (To Common Header)
MO2-1001-4A (N.C.) MO3-1001-4A (N.C.)MO2-1001-4B (N.C.) MO3-1001-4B (N.C.)MO2-1001-4C (N.C.) MO3-1001-4C (N.C.)
3. Shutdown Cooling Pump Common Header Discharge Valves (To Recirc Loop)
MO2-1001-5A (N.C.) MO3-1001-5A (N.C.)MO2-1001-5B (N.C.) MO3-1001-5B (N.C.)
C. Valves Inside Containment
1. Shutdown Cooling Pump Suction Valves
MO2-1001-1A (N.C.) MO3-1001-1A (N.C.)MO2-1001-1B (N.C.) MO3-1001-1B (N.C.)
2. Recirculation Loop Valves
MO2-0202-4A (N.O.) MO3-0202-4A (N.O.)MO2-0202-4B (N.O.) MO3-0202-4B (N.O.)MO2-0202-5A (N.O.) MO3-0202-5A (N.O.)MO2-0202-5B (N.O.) MO3-0202-5B (N.O.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-10
TABLE 3.2-1 (Continued)
SHUTDOWN COOLING METHOD - COLD SHUTDOWN EQUIPMENT
II. Secondary Loop Active Mechanical Components
A. Reactor Building Closed Cooling Water(RBCCW) Pumps
2A-3701 3A-37012B-3701 3B-3701
B. Valve Connecting Shutdown Cooling HXs to RBCCW System
MO2-3704 (N.C.) MO3-3704 (N.C.)
III. Active Support Components
A. Service Water Pumps
2A-3901 3A-3901 2/3-39012B-3901 3B-3901
IV. Potential Spurious Signal Valves
A. In-Line Valves Outside Containment That Must Remain in Initial Configuration
1. RBCCW Discharge Valve
MO2-3701 (N.O.) MO3-3701 (N.O.)
2. Valves Allowing Service Water Flow Through RBCCW HXs
TCV-2-3904A (N.O.) TCV-3-3904A (N.O.)TCV-2-3904B (N.O.) TCV-3-3904B (N.O.)TCV-2-3904C (N.O.)
B. Boundary Valves Outside Containment That Must Remain in Initial Configuration
RBCCW Valves: MO2-3702 (N.O.) MO3-3702 (N.O.)MO2-3703 (N.O.) MO3-3703 (N.O.)
(Note: Both valves for a given unit must be open to provide cooling water to drywell coolers and recirculating pumps.)
C. Boundary Valve Inside Containment That Must Remain in Initial Configuration
RBCCW Valves: MO2-3706 (N.O.) MO3-3706 (N.O.)
(Note: This valve must be open to provide cooling water to drywell coolers and recirculating pumps.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-11* Used if offsite power is available.
TABLE 3.2-2SHUTDOWN COOLING METHOD - POWER DISTRIBUTION EQUIPMENT
Unit 22/3 Diesel Generator2/3 Diesel Generator Water Pump2/3 Diesel Generator Vent Fan2/3 Diesel Generator Fuel Transfer Pump2 Diesel Generator2 Diesel Generator Cooling Water Pump2 Diesel Generator Vent Fan2 Diesel Generator Fuel Transfer PumpReserve Auxiliary Transformer 22*4-kV SWGR 234-kV SWGR 23-14-kV SWGR 244-kV SWGR 24-1480-V Bus 28480-V Bus 29480-V MCC 28-1480-V MCC 28-2480-V MCC 28-7480-V MCC 29-1480-V MCC 29-2480-V MCC 29-7250-Vdc Battery 3250-Vdc Battery Charger 3250-Vdc Turbine Building MCC 3250-Vdc MCC 2A250-Vdc MCC 2B125-Vdc Battery 2125-Vdc Battery 3125-Vdc Battery Charger 2125-Vdc Battery Charger 3125-Vdc Turbine Building Main Bus 2125-Vdc Turbine Building Main Bus 3125-Vdc Reserve Bus 2125-Vdc Distribution Panel 2120/240-V Essential Service Distribution Panel 902-49120/240-V Instrument Bus 902-50
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-12* Used if offsite power is available.
TABLE 3.2-2 SHUTDOWN COOLING METHOD - POWER DISTRIBUTION EQUIPMENT
UNIT 32/3 Diesel Generator2/3 Diesel Generator Cooling Water Pump2/3 Diesel Generator Vent Fan2/3 Diesel Generator Fuel Transfer Pump3 Diesel Generator3 Diesel Generator Cooling Water Pump3 Diesel Generator Vent Fan3 Diesel Generator Fuel Transfer PumpReserve Auxiliary Transformer 32*4-kV SWGR 334-kV SWGR 33-14-kV SWGR 344-kV SWGR 34-1480-V Bus 38480-V Bus 39480-V MCC 38-1480-V MCC 38-2480-V MCC 38-7480-V MCC 39-2480-V MCC 39-7250-Vdc Battery 2250-Vdc Battery Charger 2250-Vdc Turbine Building MCC 2250-Vdc MCC 3A250-Vdc MCC 3B125-Vdc Battery 2125-Vdc Battery 3125-Vdc Battery Charger 2125-Vdc Battery Charger 3125-Vdc Turbine Building Main Bus 2125-Vdc Turbine Building Main Bus 3125-Vdc Reserve Bus 3125-Vdc Distribution Panel 3120/240-V Essential Service Distribution Panel 903-49120/240-V Instrument Bus 903-50
DRESDEN 2&3 AMENDMENT 16 JUNE 2007
3.2-13
TABLE 3.2-3
SHUTDOWN COOLING METHOD -DIESEL GENERATOR (1)(2) LOADING FOR COLD SHUTDOWN
Conservative 2-Train Operation
Normal Experience1- Train Operation
Loadsbhp(4)
each No.est. bhp required No.
est. bhp required
Shutdown Cooling Pump 500 2 1000 1 500
RBCCW Pump 270 2 540 1 270
Service Water Pump 950 1 950 1 950
Emergency ac Lighting 30 1 30 1 30
480-V Transformer Losses 15 1 15 1 15
Essential Instrumentation and Battery Charger
141 1 141 1 141
Diesel Auxiliaries (Cooling Water Pump, Fuel Transfer Pump, and Starting Air Compressor and Vent Fan)
Control Rod Drive Pump(s)
147.5
250
1
1
147.5
250
1
1
147.5
250
----3073.5bhp
--------2303.5bhp
kW required bhp x .746 .93 (motor eff.)
2465 kW 1848 kW
(1) Each diesel-driven standby diesel generator is sized at 2600 kW at 0.8 power factor and for 10% overload for 2000 hours per year.
(2) One diesel generator per unit is needed for cold shutdown.
(3) Data from UFSAR Table 8.3.-3 or nameplate.
DRESDEN 2&3 AMENDMENT 16 JUNE 2007
3.2-14
TABLE 3.2-4
LPCI/CCSW DIVISION II METHOD - COLD SHUTDOWN EQUIPMENT
I. Primary Active Mechanical Components
A. LPCI Pumps ECCS Keep Fill Pump
2C-1502 3C-1502 2-1401-4 3-1401-4
2D-1502 3D-1502
B. 1. Valve Allowing Flow to Core
MO2-1501-22B (N.C.) MO3-1501-22B (N.C.)
2. Hx Bypass Valve
MO2-1501-11B (N.O.) MO3-1501-11B (N.O.)
3. Minimum Flow Valve
MO2-1501-13B (N.O.) MO3-1501-13B (N.O.)
4. Valves Allowing Flow to Suppression Pool
MO2-1501-22A (N.C.) MO3-1501-22A (N.C.)
5. Valves Allowing flow to ECCS Keep Fill Pump
2-1402-3AMO3 3-1402-3BC. Valves Inside Containment
1. Target Rock Valves:
2-203-3A 3-203-3A
2. Electromatic Relief Valves:
2-203-3B 3-203-3B2-203-3C 3-203-3C2-203-3D 3-203-3D2-203-3E 3-203-3E
3. Shutdown Cooling Pump Suction Valves
MO2-1001-1A (NC) MO3-1001-1A (NC)
MO2-1001-1B (NC) MO3-1001-1B (NC)
4. Recirculation Loop Valves
MO2-0202-4A (NO) MO3-0202-4A (NO)
MO2-0202-4B (NO) MO3-0202-4B (NO)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-15
TABLE 3.2-4
LPCI/CCSW DIVISION II METHOD - COLD SHUTDOWN EQUIPMENT
II. Active Support Components
A. Containment Cooling Service Water (CCSW) Pumps
2C-1501-44 3C-1501-442D-1501-44 3D-1501-44
B. CCSW Pump Coolers
2-5700-30C 2-5700-30D 3-5700-30C 3-5700-30D
C. CCSW HX Discharge Valve
MO2-1501-3B (N.C.) MO3-1501-3B (N.C.)
D. LPCI Emergency Air Cooler
2-5746B 3-5746B
E. Diesel Generator Cooling Water Pump
2-3903B 2/3-3903B 3-3903B
III. Potential Spurious Signal Valves
A. In-Line Valves Required to Remain in Initial Configuration
1. Valve Allowing Flow to Core
MO2-1501-21A (N.O.) MO3-1501-21A (N.O.)MO2-1501-21B (N.O.) MO3-1501-21B (N.O.)
2. LPCI Pump Suction Valves
MO2-1501-5C (N.O.) MO3-1501-5C (N.O.)MO2-1501-5D (N.O.) MO3-1501-5D (N.O.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-16
TABLE 3.2-4
LPCI/CCSW DIVISION II METHOD - COLD SHUTDOWN EQUIPMENT
B. Boundary Valves Required to Remain in Initial Configuration
1. Valves Allowing Containment Spray
MO2-1501-27A (N.C.) MO3-1501-27A (N.C.)MO2-1501-28A (N.C.) MO3-1501-28A (N.C.)MO2-1501-27B (N.C.) MO3-1501-27B (N.C.)MO2-1501-28B (N.C.) MO3-1501-28B (N.C.)
(Note: Both valves associated with a given unit must open to allow flow to containment spray.)
2. Valves Allowing Flow to Spray Ring Header in Suppression Pool
MO2-1501-18A (N.C.) MO3-1501-18A (N.C.)MO2-1501-19A (N.C.) MO3-1501-19A (N.C.)MO2-1501-18B (N.C.) MO3-1501-18B (N.C.)MO2-1501-19B (N.C.) MO3-1501-19B (N.C.)
(Note: Both valves associated with a given unit must open to allow flow to suppression spray ring header.)
3. Valves Allowing Flow to Suppression Pool
MO2-1501-38B (N.C.) MO3-1501-38B (N.C.)MO2-1501-20B (N.C.) MO3-1501-20B (N.C.)
(Note: Both valves associated with a given unit would have to open to allow flow to the suppression pool.)
DRESDEN 2&3 AMENDMENT 16JUNE 2007
3.2-17* Used if offsite power is available.
TABLE 3.2-5LPCI-CCSW DIVISION II METHOD - POWER DISTRIBUTION EQUIPMENT
UNIT 22/3 Diesel Generator2/3 Diesel Generator Cooling Water Pump2/3 Diesel Generator Vent Fan2/3 Diesel Generator Fuel Transfer Pump2 Diesel Generator2 Diesel Generator Cooling Water Pump2 Diesel Generator Vent Fan2 Diesel Generator Fuel Transfer PumpReserve Auxiliary Transformer 22*4-kV SWGR 234-kV SWGR 23-1480-V Bus 28480-V MCC 28-14-kV SWGR 244-kV SWGR 24-1480-V Bus 29480-V MCC 29-2480-V MCC 29-4480-V MCC 29-7125-Vdc Battery 3125-Vdc Battery Charger 3125-Vdc Turbine Building Main Bus 3120/240-V Essential Service Distribution Panel 902-49UNIT 32/3 Diesel Generator2/3 Diesel Generator Cooling Water Pump 2/3 Diesel Generator Vent Fan2/3 Diesel Generator Fuel Transfer Pump3 Diesel Generator3 Diesel Generator Cooling Water Pump3 Diesel Generator Vent Fan
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.2-18* Used if offsite power is available.
TABLE 3.2-5 LPCI-CCSW DIVISION II METHOD - POWER DISTRIBUTION EQUIPMENT
3 Diesel Generator Fuel Transfer PumpReserve Auxiliary Transformer 32*4-kV SWGR 344-kV SWGR 34-1480-V Bus 39480-V MCC 39-1480-V MCC 39-2480-V MCC 39-7125-Vdc Battery 2125-Vdc Battery Charger 2125-Vdc Turbine Building Main Bus 2125-Vdc Turbine Building Reserve Bus 3120/240-V Essential Service Distribution Panel 903-49
DRESDEN 2&3 AMENDMENT 16JUNE 2007
3.2-19
TABLE 3.2-6
LPCI/CCSW DIVISION II METHOD -DIESEL GENERATOR (1) (2) LOADING FOR COLD SHUTDOWN
2-LPCI/2-CCSW Pumps
Necessary
1-LPCI/1-CCSWPumps
Necessary
Loads bhp (4) No.est. bhp. No.
est. bhp.
LPCI Pumps 700 2 1400 1 700
CCSW Pumps 500 2 1000 1 500
Emergency ac Lighting 30 30 30
480-V Transformer Losses 27 27 27
Essential Instrumentation and Battery ChargerKeep Fill Pump
141
7.5
141
7.5
141
7.5Diesel Generator Aux. including ECCS Pump Room Coolers 155.5 155.5 155.5
AC Power Operated Valves 147 147 147
Drywell Cooling Blowers 75 -- 4 300 (3)
RBCCW System 300 -- 1 270 (3)
Service Water Pump 950 ---------
2908 bhp
1 950(3)
------3228 bhp
kW required bhp x .746 .93 (motor eff.)
2333 kW 2589 kW
(1) Each diesel-driven standby diesel generator is sized at 2600 kW at .8 power factor and for 10% overload for 2000 hours per year.
(2) One diesel generator per unit is needed for cold shutdown.
(3) These loads are not considered part of the minimum system for safe cold shutdown, however, they are included here because of the desirability of reestablishing drywell cooling if the system is available and the diesel generator can handle the load.
(4) Data from UFSAR Tables 8.3-2 and 8.3-3 or nameplate.
DRESDEN 2&3 AMENDMENT 16JUNE 2007
3.3-1
3.3 Associated Circuits
In the subsequent clarification to Generic Letter 81-12 (see Section 1.4), in regard to associated circuits, the NRC identified three categories of associated circuits whose fire induced failure could affect safe shutdown:
1. Common Power Source (see Section 3.3.2)2. Common Enclosure (see Section 3.3.3)3. Spurious Operation (see Section 3.3.4)
The circuits that may affect the normal automatic and manual operation of safe shutdown systems and components identified in Section 3.1 and 3.2 due to fire-induced faults were identified using the electrical schematic and wiring diagrams. These circuits include the normal control and power circuits for safe shutdown components (required circuitry) and the interlocks between the safe shutdown component control circuit and other circuits (fire protection associated circuitry).
Figure 3.3-1 shows a typical cabling diagram and Figure 3.3-2 shows a typical schematic diagram which both illustrate required, associated and nonassociated circuitry. In Figure 3.3-2, the contacts of Relay B2 are used in the operation of Pumps 1A and 1B which are safe shutdown equipment. This makes Cables 15A, 15B, 16A, 16B, 17A and 17B shown in Figure 3.3-1 required circuitry. Relay B2 will not operate unless Relay A2 and Pressure Switch PS2 operates. Relay B2 will also not operate without power. This makes Cables 7, 8 and 10 associated circuitry. Relay A2 will not operate unless Pressure Switch PS5 operates and there is power to Relay A2. This makes Cables 14 and 11 associated circuitry.
In addition, a ground on Cables 5, 10, 12 or 13 would blow the fuses at Panel A removing power from Relay A2. A ground on Cables 9 or 10 would blow the fuses at Panel B removing power from Relay B2. This makes Cables 5, 9, 12 and 13 also associated circuitry. Circuit malfunctions on any of these associated cables would lead to the loss of a safe shutdown function.
Cables 1, 2, 3, 4 and 6 in Figures 3.3-1 and 3.3-2 do not affect the operation of Pumps 1A and 1B and are considered non-associated circuitry.
After determining cables of concern (required and associated circuitry), the physical routing of these cables was determined by examining the Cable Tabulations and Cable Tray Diagrams. Thecables for each component and their physical locations were documented in Appendix A of this volume for hot shutdown. Also, the resolution to each concern is documented in Appendix A.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.3-2
3.3.1 Assumptions for Circuit Failures
Fire damage to electrical power and control cables is assumed to cause either one or a combination of the following circuit failures:
1. Short -Individual conductors within a cable short to each other.
2. Ground -Individual conductors within a cable are grounded to the supporting raceway or other grounded structure.
3. Open -Individual conductors within a cable lose electrical continuity.
4. Hot Short -Individual conductor(s) within a cable are shorted to individual conductor(s) of a different cable. This type of short includes the case of one deenergized circuit becoming energized by shorting to an external source of electrical power through independent conductor-to-conductor shorts.
For the analysis of potential spurious operations, two types of hot short conditions are considered of sufficiently low likelihood that they are not credited as producing spurious component actuations. These are:
1. Three-phase ac power circuit cable-to-cable faults matching each phase-to-phase (4-kV and 480-V).
2. Two-wire ungrounded 125-V/250-V dc circuits cable-to-cable faults positive to positive and negative to negative.
Cable-to-cable connections between one de-energized and one energized power circuit could cause spurious operations. In the case of the three-phase ac circuits, three electrically independent cable-to-cable shorts (hot shorts) matching phases must occur without ground, opens or shorts within a cable in order to power the associated device. Similarly, for the two-wire ungrounded dc circuit, two electrically independent cable-to-cable shorts (hot shorts), positive to positive and negative to negative, must occur without shorts within a cable.
The NRC staff has acknowledged that the events described for types (1) and (2) above have a sufficiently low probability of occurrence to permit exclusion of such conditions from consideration (Federal Register, Vol. 48, No. 86 at 19963). The basis for excluding the cable short conditions listed in types (1) and (2) as a credible cause of spurious operations is that multiple cable-to-cable electrically independent faults are required in order for spurious operations to occur.
With respect to three-phase power cables, in order for a motor to be activated in forward or reverse, it would be necessary for two cables to become severed, and then for all three conductors of those two cables to become independently connected in any combination. It would also requirethat one of the cables be connected to a power source and the other to a motor. This type of
DRESDEN 2&3 AMENDMENT 13JUNE 2001
3.3-3
failure is considered to be incredible and is not considered in the analysis.
With respect to two-wire ungrounded dc power circuit faults, in order for a device to be activated, either of the following would have to occur:
1. The cables would have to be severed and then two wires of one connected to two wires of the other. It would also require that one of the cables be connected to a power source and the other to a susceptible device.
2. The cable to the equipment in question would have to fail such that one wire goes to ground and the other hot shorts to another dc wire of the same polarity. If a ground exists on the battery of the opposite polarity (the grounded leg of the equipment), then the equipment would be activated.
Both case (1) and (2) are considered highly incredible and are not considered in the analysis.
3.3.2 Common Power Source
Circuits sharing a common power source are isolated from essential equipment by breakers, fuses, or other isolation devices. Coordinated fault protection is addressed in Section 5.5.
3.3.3 Common Enclosure
Circuits that share a common enclosure with essential circuits will not provide a path for fire propagation out of a fire area or zone group since the areas are generally enclosed by substantial barriers to fire which have all electrical penetrations sealed or the circuits are clearly separated from the other zone groups due to other features. On the ground floor of the Turbine Building, no physical boundary exists along the access corridor between TB-I, TB-II, and TB-III. In this part of the plant, automatic fire detection, automatic suppression, wrapping of selected cable trays, and physical distance provide assurance that the fire will not propagate via the cables. (See Exemption Requests, F.P.R. Volume 4, and Section 2.0 of this report.)
Also sharing a common enclosure with safe shutdown circuits are cables connected to control power and current transformers. The effects upon safe shutdown circuits of faults on these cables are presented in Section 5.3.
3.3.4 Spurious Operation
The spurious operation of the plant components and their associated electrical equipment (safe shutdown or otherwise) from fire-induced spurious circuit malfunctions could affect safe shutdown capability by leading to a loss of a safe shutdown function. The effects of spurious valve operation are analyzed in Section 5.1 and the effects of spurious operation of breakers are addressed in Section 5.2.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.0-1
4.0 SAFE SHUTDOWN ANALYSIS
The hot and cold shutdown equipment and cabling in each fire area or equivalent was examined in this analysis. The physical location of safe shutdown equipment and cabling is shown on the F-drawings. For hot shutdown, damage to all electrical (including cable) and mechanical components within the fire area under consideration was assumed except where physically protected by fire barriers. For cold shutdown, damage to all electrical and mechanical equipment within each fire area is conservatively assumed except for the reactor buildings. In the reactor buildings, all electrical cable and components except for motor operators are assumed damaged in each fire area. All mechanical components and motor operators are assumed damaged only if they are located within the same fire zone. Justification for this assumption is provided in Section 3.8 and 4.10 of the Exemption Requests (F.P.R. Volume 4). For each fire area, a shutdown path composed of all mechanical equipment independent of that fire area was identified. While cable routing was considered in this selection, it was not always possible to select a shutdown path independent of all electrical cables in an area. If a cable necessary to operate or associated with equipment in that shutdown path was routed through the fire area under consideration, it was considered a discrepancy.
The disposition of each cable discrepancy was evaluated using the electrical schematic diagrams to identify an appropriate solution of each problem. The various types of solutions proposed for safe shutdown included, but are not limited to:
-local control and isolation capability,-local mechanical indicators,-mechanical piping crossties,-manual valve operation,-alternate power feeds for inaccessible valves.
Repair procedures are generally identified for each discrepancy for cold shutdown unless a modification was identified for hot shutdown. The resolution of each hot shutdown cable discrepancy on a fire area basis is documented in Appendix A. Specific modifications resulting from these resolutions are discussed in Section 6.0. The specific manual actions and cold shutdown repairs are listed in Section 7.0.
The following sections of this chapter present the hot and cold shutdown analysis on an area-by-area basis. Table 4.0-1 summarizes the fire area and the hot and cold safe shutdown path for each fire zone.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
* No shutdown cable or equipment is located in this zone. All methods of shutdown are available
** Drywell is inerted, no fire postulated. All methods of shutdown are available.4.0-2
TABLE 4.0-1APPENDIX R HOT SHUTDOWN PATHS BY FIRE ZONE
Fire Zone
Fire Area/Equivalent Area/
Zone Group
HotShutdown
Path
Cold Shutdown
Path
Cold ShutdownDG (Note 1)Availability
Safe Shutdown AnalysisSection
1.1.1.1 RB3-II A1 SC 2/3, 2 4.51.1.1.2 RB3-II A1 SC 2/3, 2 4.51.1.1.3 RB3-II A1 LPCI Div. II 2/3, 2 4.51.1.1.4 RB3-II A1 SC 2/3, 2 4.5
1.1.1.5.A RB3-I D SC 2/3, 2, 3 4.41.1.1.5.B RB3-I D SC 2/3, 2, 3 4.41.1.1.5.C RB3-I D SC 2/3, 2, 3 4.41.1.1.5.D RB3-II A1* SC 2/3, 2, 3 4.51.1.1.6 RB3-II B* SC 2/3, 2, 3 4.51.2.1 Drywell B** SC 2/3, 2, 3 4.61.2.2 Drywell A** SC 2/3, 2, 3 4.31.3.1 RB3-II A1 LPCI Div.II 2/3, 2 4.51.3.2 RB2-I C LPCI Div. II 2/3, 3 4.11.4.1 RB3-I D SC 2/3, 2 4.4
1.1.2.1 RB2-II B1 SC 2/3, 3 4.21.1.2.2 RB2-II B1 SC 2/3, 3 4.21.1.2.3 RB2-II B1 LPCI Div.II 2/3, 3 4.21.1.2.4 RB2-II B1 SC 2/3, 3 4.2
1.1.2.5.A RB2-I C SC 2/3, 2, 3 4.11.1.2.5.B RB2-I C SC 2/3, 2, 3 4.11.1.2.5.C RB2-I C SC 2/3, 2, 3 4.11.1.2.5.D RB2-II B1* SC 2/3, 2, 3 4.21.1.2.6 RB2-II A* SC 2/3, 2, 3 4.2
2.0 TB-V A2 and B2 SC 2/3, 2, 3 4.126.1 TB-III A1 SC 2/3, 2 4.106.2 TB-V A2 and B2 SC 2/3, 2, 3 4.12
7.0.A.1 TB-I B1 SC 2/3, 3 4.87.0.A.2 TB-I B1 SC 2/3, 3 4.8
AMENDMENT 14JUNE 2003
DRESDEN 2&3
* No shutdown cable or equipment is located in this zone. All methods of shutdown are available
** Drywell is inerted, no fire postulated. All methods of shutdown are available.4.0-3
TABLE 4.0-1APPENDIX R HOT SHUTDOWN PATHS BY FIRE ZONE
Fire Zone
Fire Area/Equivalent Area/
Zone Group
HotShutdown
Path
Cold Shutdown
Path
Cold ShutdownDG (Note 1)Availability
Safe Shutdown AnalysisSection
7.0.A.3 TB-I B1 SC 2/3, 3 4.87.0.B TB-III A1 SC 2/3, 2 4.108.1 TB-I B1* SC 2/3, 2, 3 4.8
8.2.1.A TB-I B1 SC 2/3, 3 4.88.2.1.B TB-III A1 SC 2/3, 2 4.108.2.2.A TB-I B1 SC 2/3, 3 4.88.2.2.B TB-III A1 SC 2/3, 2 4.108.2.4 TB-III A1 SC 2/3, 2 4.10
8.2.5.A TB-I B1 SC 2/3, 3 4.88.2.5.B TB-I B1 SC 2/3, 3 4.88.2.5.C TB-II A2 and B2 SC 2/3, 2 4.98.2.5.D TB-III A1 SC 2/3, 2 4.108.2.5.E TB-III A1 SC 2/3, 2 4.108.2.6.A TB-I B1 SC 2/3, 3 4.88.2.6.B TB-I B1 SC 2/3, 3 4.88.2.6.C TB-II A2 and B2 SC 2/3, 2 4.98.2.6.D TB-III A1 SC 2/3, 2 4.108.2.6.E TB-III A1 SC 2/3, 2 4.108.2.7 TB-I B1 SC 2/3, 3 4.88.2.8 TB-IV A and B* SC 2/3, 2, 3 4.119.0.A TB-I B1 SC 2/3, 3 4.89.0.B TB-III A1 SC 2/3, 2 4.109.0.C RB 2/3 E and F SC 2, 3 4.711.1.1 RB3-II A1 SC 2/3, 2 4.511.1.2 RB3-II A1 SC 2/3, 2 4.511.1.3 RB 2/3 F SC 2, 3 4.711.2.1 RB2-II B1 SC 2/3, 3 4.211.2.2 RB2-II B1 SC 2/3, 3 4.211.2.3 RB 2/3 E SC 2, 3 4.711.3 Crib House A,B,E,F SC 2/3, 2, 3 (Note 2) 4.1314.1 Radwaste A and B* SC 2/3, 2, 3 4.14
AMENDMENT 20JUNE 2015
DRESDEN 2&3
* No shutdown cable or equipment is located in this zone. All methods of shutdown are available
** Drywell is inerted, no fire postulated. All methods of shutdown are available.4.0-4
TABLE 4.0-1APPENDIX R HOT SHUTDOWN PATHS BY FIRE ZONE
Fire Zone
Fire Area/Equivalent Area/
Zone Group
HotShutdown
Path
Cold Shutdown
Path
Cold ShutdownDG (Note 1)Availability
Safe Shutdown AnalysisSection
14.2 TB-IV A and B* SC 2/3, 2, 3 4.1114.3 TB-IV A and B* SC 2/3, 2, 3 4.1114.4 Misc A and B* SC 2/3, 2, 3 4.1514.5 Radwaste A and B* SC 2/3, 2, 3 4.1414.6 Radwaste A and B* SC 2/3, 2, 3 4.14
18.1.1 Misc A and B* SC 2/3, 2, 3 4.1518.1.2 Misc A and B* SC 2/3, 2, 3 4.1518.2.1 Misc A and B* SC 2/3, 2, 3 4.15
18.2.2 Misc A and B* SC 2/3, 2, 3 4.15
18.3.1 Misc A and B* SC 2/3, 2, 3 4.15
18.3.2 Misc A and B* SC 2/3, 2, 3 4.15
18.4 Misc A and B* SC 2/3, 2, 3 4.1518.6 Misc A and B* SC 2/3,2,3 4.15
18.7.1 Misc E and F SC 2/3,2,3 4.1518.7.2 Misc E and F SC 2/3,2,3 4.15Unit 1
StructuresMisc A and B* SC 2/3, 2, 3 4.15
Note 1: a. 2/3 diesel generator implies that Division I power is available for cold shutdown.
b. 2 diesel generator or 3 diesel generator implies that Division II power is available for cold shutdown.
c. One diesel generator must be available for cold shutdown for each unit if offsite power is lost (i.e., 2 of 3).
Note 2. Two of three diesel generator cooling water pumps will be available for cold shutdown depending on location of the fire in the crib house lower level.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.1-1
4.1 Unit 2 Reactor Building Fire Area RB2-I
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-3 (Fire Zone 1.3.2), F-4 (Fire Zone 1.1.2.5.C), F-5 (Fire Zone 1.1.2.5.B) and F-6 (Fire Zone 1.1.2.5.A).
4.1.1 Hot Shutdown Analysis
For a fire in RB2-I, HPCI system shutdown path C (Table 3.1-8) will be used to shut down the unit. Diesel Generator 2 will be used to power essential equipment. The electromatic relief valves are available for initial pressure control except in Fire Zone 1.3.2. In this zone, the target rock valve and the safety valve are available for pressure control. The LPCI system and containment cooling water system are available for suppression pool cooling. All necessary equipment may be operated from the control room. Reactor pressure and level are monitored at local indicators. Instruments for Torus temperature and level are monitored in the control room. This fire area contains no essential or associated cable for HPCI shutdown path C.
4.1.2 Cold Shutdown Analysis
For the cold shutdown analysis, the Unit 2 reactor building was analyzed as a single fire area. This analysis is in Section 4.2 which follows
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.2-1
4.2 Unit 2 Reactor Building Fire Area RB2-II
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-2 (Fire Zones 11.2.1, 11.2.2 and 1.1.2.1), F-3 (Fire Zone 1.1.2.2), F-4 (Fire Zone 1.1.2.3), F-5 (Fire Zone 1.1.2.4), F-6 (Fire Zone 1.1.2.5.D) and F-7 (Fire Zone 1.1.2.6).
4.2.1 Hot Shutdown Analysis
Alternative isolation condenser shutdown path B1 (Table 3.1-7) is used to shut down Unit 2 using Unit 3 equipment and interunit crossties independent of this fire area. Since the Unit 2 4-kV switchgear, 480-V switchgear, 250-V MCC's and 125-V reactor building distribution center with their associated cables are located in this fire area, the 2/3 diesel generator is used to power essential equipment via the Unit 3 power train. Control rod drive pump 3A is available for reactor water makeup. The electromatic relief valves may not be available for initial pressure control but the target rock valve and safety valves are available if necessary. Makeup to the isolation condenser is available from either isolation condenser makeup pump. Service water pump 3A is available for cooling of the CRD pumps and for makeup to the isolation condenser if long-term operation of the isolation condenser is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source. Local instruments are used to monitor Reactor Pressure and Reactor Vessel water level. See Subsection 3.1.1.1.5 of this report.
The control rod drive pump and service water pump are powered from Unit 3 and are available to support Unit 2 shutdown through mechanical crossties. The bus duct from the 2/3 diesel generator to 4-kV switchgear 23-1 is routed in this area. A fault on the bus duct would not affect operation of the diesel generator because a 4-kV breaker in the diesel generator room would isolate this feed from the diesel generator. The 2/3 diesel generator would remain available to provide power via Unit 3 (see Subsection 6.2.3.1). All cables routed in this area that could affectcontrol and excitation of the 2/3 diesel generator and associated circuits can be isolated in the diesel generator room and panels have been installed to permit local starting and operation of the 2/3 diesel generator. Redundant 125-Vdc control power is available from Unit 3. Redundant power feeds to the 2/3 diesel generator auxiliaries (room ventilation fan and fuel oil transfer pump) area are available from Unit 3. Local transfer switches have been installed in the 2/3 diesel generator room to isolate the Unit 2 feeds. (See Subsection 6.2.3.1)
Cables and power supplies for the Unit 2 isolation condenser valves are located in this fire area. All isolation condenser motor-operated valves are independent of this fire area and are accessible for manual operation except for valves MO2-1301-1 and MO2-1301-4 which are located in the drywell. The normal power feeds to these drywell valves are routed through Fire Zone 1.1.2.2 from 480-V MCC 28-1 to the drywell penetrations in Fire Zone 1.3.2 (part of RB2-I). To ensure that these valves will be open as required for safe shutdown, alternate power feeds have been routed to the Unit 2 drywell penetrations in Fire Zone 1.3.2 from Unit 3 (see Subsection 6.2.1.4). The normal access to valves MO2-1301-2 and MO2-1301-3, located in the isolation condenser pipe chase (RB2-I), is through the fire doors to the pipe chase at 41/M on both the 545-foot 6-inch elevation and the 570-foot 0-inch elevation. Access to the pipe chase is also available fromElevation 589 feet 0 inches in Fire Area RB2-I. Intervening grating has been cut and access
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-2
ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area (see Subsection 6.2.1.6). Vent valves AO2-1301-17 and AO-1301-20 fail in the closed position. In the event these valves fail to close, manual valve 2-1301-16 may be closed to isolate this line. Manual operation of valves MO2-4399-74, MO2-4102 and MO2-1301-10 may be required to add makeup water to the isolation condenser.
480V Bus 29 which supplies power to the Unit 2 fuel oil transfer pump could potentially be affected by a fire in this area. If isolation condenser makeup is required for more than 8 hours after shutdown is initiated, the diesel oil day tanks for the isolation condenser makeup pumps can be manually refilled.
If one of the diesel makeup pumps runs out of fuel, the other pump may be started to provide water.
Associated cables routed in this zone include LPCI circuits, core spray circuits, primary containment isolation circuits, and main steam isolation circuits. The LPCI and core spray circuitry is associated with the 4-kV power distribution. However, since the Unit 3 power train is used for this zone, faults on these circuits will not affect safe shutdown. The primary containmentisolation, and main steam isolation circuits are associated with isolation condenser valves. However, the drywell valves will be controlled from the alternate power source by isolating the automatic circuitry and the power train to the remaining valves will be deenergized and the valves operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown. Spurious auto blowdown initiation is prevented by manual operation of the ADS auto-blowdown inhibit switch installed at the MCB (see Subsection 6.2.1.8) and spurious operation of the individual relief valves is prevented by placing the handswitch of the Electromatic relief valves (ERV’s) and the Target Rock safety/relief valve control switches in the "OFF" positions and by racking out the circuit breakers that supply 125-Vdc power to the valves.
Cable discrepancies within RB2-II and their resolutions are presented in Appendix A. A discussion of the instrumentation available to the operators is in Subsection 3.1.1.1.5.
The refueling floor of Fire Zone 1.1.2.6 and Fire Zone 1.1.2.5.D contains no safe shutdown equipment or cabling but is considered part of Fire Area RB2-II. Therefore, the isolation condenser shutdown path A (Table 3.1-3), which would normally be used in case of loss of offsite power, can be utilized for a postulated fire in these fire zones.
There are no cable discrepancies in Fire Zone 1.1.2.6.
4.2.2 RB2-I and RB2-II Cold Shutdown Analysis
A significant amount of electrical and mechanical equipment necessary for cold shutdown is located in the Unit 2 reactor building Fire Areas RB2-I and RB2-II. The reactor building is divided into fire zones by floor elevations and rated fire barriers on a particular floor. These floor slabs present a substantial barrier to the spread of fire. However, they are not fire rated. Additionally, the combustible loading is low and area-wide automatic fire detection would ensure
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-3
that the fire was detected and extinguished before it spread to adjacent floor elevations disabling
the mechanical components and their operators. See the Fire Hazards Analysis, Sections 4.1 and 4.2 (F.P.R. Volume 1) and Section 3.8 of the Exemption Requests (F.P.R. Volume 4) for detailed justification for this assumption.
The mechanical and electrical equipment necessary for cold shutdown located by fire zone is identified in Table 4.2-1.
The location of cable and equipment in the reactor building is shown on the drawings listed below.
Fire ZoneF Series
Drawings Cold Shutdown Method1.1.2.1 F-2 Shutdown Cooling1.1.2.2 F-3 Shutdown Cooling1.1.2.3 F-4 LPCI1.1.2.4 F-5 Shutdown Cooling
1.1.2.5.A,B,C,D F-4, F-5, F-6 Shutdown Cooling1.1.2.6 F-7 Shutdown Cooling1.3.2 F-3 LPCI11.2.1 F-2 Shutdown Cooling11.2.2 F-2 Shutdown Cooling
In the Unit 2 reactor building fire area, the shutdown cooling system can be used for cold shutdown in every fire zone except for the mezzanine floor, Fire Zone 1.1.2.3 (Fire Area RB2-II) and the shutdown cooling pump room, Fire Zone 1.3.2 (Fire Area RB2-I). On the mezzanine floor, the presence of the RBCCW pumps precludes the use of the shutdown cooling system (see Subsection 3.2.1). In the shutdown cooling pump room, the presence of the shutdown cooling pumps preclude the use of the shutdown cooling systems.
Table 4.2-2 identifies the manual actions and repairs necessary to achieve cold shutdown using shutdown cooling. The actions identified in this table conservatively assume the loss of all electrical cable and equipment in the Unit 2 reactor building. Electrical power is provided to Unit 2 equipment by temporary connections to switchgear and motor control centers in Unit 3. Manual handwheel operation of accessible valves is assumed. Modifications identified in the hot shutdown analysis provide capability to operate the 2/3 diesel generator independent of fire damage in Unit 2 (see Subsection 6.2.3.1); also, diesel generator 3 and its auxiliaries are independent of the Unit 2 reactor building.
Table 4.2-3 identifies the manual actions and repairs necessary to achieve cold shutdown using the LPCI method for Fire Zones 1.1.2.3 and 1.3.2.
Redundant mechanical components of the selected cold shutdown path are located in the same
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-4
fire zone in two instances. The justification for why a fire will not affect both redundant
components is given below.
1. Basement Floor (Fire Zone 1.1.2.1)
Valves MO2-1001-5A, MO2-1001-5B, MO2-3702, and MO2-3703 are located in this fire zone and are associated with the shutdown cooling method. The shutdown cooling method would still be available based on the following justification.
MO2-1001-5AMO2-1001-5B
These valves are located 180! apart on opposite sides of the torus. These valves are in separate loops. As stated in Sub-section 3.2.1, only one loop is normally used. Therefore, only one of the two valves needs to be opened. They can be handwheel operated. A single fire would not disable mechanical operation of both valves due to the physical separation, lowcombustible loading, and lack of intervening combustibles. See Fire Hazards Analysis Section 4.2 (F.P.R. Volume 1) and Section 3.8 of the Exemption Requests (F.P.R. Volume 4).
MO2-3702MO2-3703
These valves are normally open and must remain so. The only associated cables in this zone are from the limit switch and the 480-V power cable. A fault in the limit switch and 480-V power cable cannot cause valves to change position.
2. Mezzanine Floor (Fire Zone 1.1.2.3)
LPCI valves MO2-1501-27B and MO2-1501-28B are located in this zone and are associated withthe LPCI/CCSW method. The LPCI/CCSW method would still be available based on the following justification.
LPCI Valve MO2-1501-27BLPCI Valve MO2-1501-28B
These valves are in the piping to the containment spray header and are not needed for the LPCI cold shutdown system. They are normally closed and both must spuriously open to have an adverse effect on cold shutdown. The simultaneous opening of two normally closed motor-operated valves in series is not postulated except in a high-low pressure interface. This is not a high-low pressure interface.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-5
TABLE 4.2-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 2 REACTOR BUILDINGFIRE AREAS RB2-I AND RB2-II
Fire Zone 1.1.2.1
Shutdown Cooling
1. SC Valve MO2-1001-5A2. SC Valve MO2-1001-5B3. RBCCW Valve MO2-37024. RBCCW Valve MO2-3703
LPCI, Div. II
1. LPCI Valve MO2-1501-22B2. LPCI Valve MO2-1501-20B3. LPCI Valve MO2-1501-38B4. LPCI Valve MO2-1501-18B5. LPCI Valve MO2-1501-19B6. LPCI Valve MO2-1501-13B
Fire Zone 1.1.2.2
Electrical Equipment
1. 480-V MCC 28-12. 480-V MCC 29-13. 480-V MCC 29-44. 480-V MCC 29-75. 480-V MCC 28-7
LPCI, Div. II
1. LPCI Valve MO2-1501-21B
Fire Zone 1.1.2.3
Electrical Equipment
1. 4-kV SWGR 23-12. 4-kV SWGR 24-1
AMENDMENT 20JUNE 2015
DRESDEN 2&3
4.2-6
TABLE 4.2-1COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 2 REACTOR BUILDING
FIRE AREAS RB2-I AND RB2-II
Shutdown Cooling
1. SC Heat Exchangers 2A-1003, 2B-1003, 2C-1003 2. RBCCW Pumps 2A-3701, 2B-37013. RBCCW Heat Exchangers 2A3702, 2B37024. RBCCW Valve MO2-37015. RBCCW Valve MO2-37046. Service Water Valve TCV-2-3904A7. Service Water Valve TCV-2-3904B8. Service Water Valve TCV-2-3904C9. SC Valve MO2-1001-4A10. SC Valve MO2-1001-4B11. SC Valve MO2-1001-4C
LPCI, Div. II
1. LPCI Valve MO2-1501-27B2. LPCI Valve MO2-1501-28B
Fire Zone 1.1.2.4
Electrical Equipment
1. 480-V SWGR 282. 480-V SWGR 293. 250-Vdc Reactor Building MCC 2A4. 250-Vdc Reactor Building MCC 2B5. 125-Vdc Reactor Building Distribution Panel
Fire Zones 1.1.2.5.A, 1.1.2.5.B, and 1.1.2.5.C
NONE
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-7
TABLE 4.2-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 2 REACTOR BUILDINGFIRE AREAS RB2-I AND RB2-II
Fire Zone 1.1.2.6
Fire Zone 1.3.2
Shutdown Cooling
1. SC Pumps 2A-1002, 2B-1002, 2C-10022. SC Valves MO2-1001-2A, MO2-1001-2B, MO2-1001-2C3. Electrical Division I Penetrations
Fire Zone - 11.2.1
LPCI, Div. II
1. LPCI Pump 2C-15022. LPCI Pump 2D-15023. LPCI Emergency Air Cooler 2-5746B4. LPCI Valve MO2-1501-3B5. LPCI Valve MO2-1501-5C6. LPCI Valve MO2-1501-5D7. LPCI Valve MO2-1501-11B8. LPCI Valve MO2-1501-32B
Fire Zone 11.2.2
NONE
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-8
TABLE 4.2-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN THE UNIT 2 REACTOR BUILDING
Component Manual Action/Repair
MECHANICAL EQUIPMENT
Shutdown Cooling Pumps
2A-10022B-1002*2C-1002
A temporary power cable connection for two pumps to SWGR 33-1 or 34-1 on the Unit 3 side can be provided. A procedure to manually start pumps at SWGR is available. (See Subsection 7.4.1 for details.)
Shutdown Cooling Valves
MO2-1001-2AMO2-1001-2BMO2-1001-2CMO2-1001-4AMO2-1001-4BMO2-1001-4CMO2-1001-5AMO2-1001-5B
MO2-1001-1AMO2-1001-1B
Disable feed and manually position the valve.
A temporary power cable from an operable 480-V MCC to the drywell penetration can be provided. A procedure to locally operate valves from the MCC is available. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO2-0202-4AMO2-0202-4B
A temporary power cable from an operable 480-V MCC to the drywell penetrations can be provided. A procedure to locally operate valves from the MCC is available. (See Subsection 7.4.1 for details.)
RBCCW Pumps
2A-37012B-3701
A temporary power cable connection for two pumps to SWGR 33-1 or 34-1 in Unit 3 can be provided. A procedure to start pumps at the SWGR is available. (See Subsection 7.4.1 for details.)
RBCCW Valves
MO2-3701MO2-3704
Disable the feed and manually position the valve.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-9
TABLE 4.2-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN THE UNIT 2 REACTOR BUILDING
Component Manual Action/Repair
MO2-3702MO2-3703MO2-3706
Spurious operation concern only. This valve is normally open for drywell cooling. The drywell cooling function, while important, is not considered essential to cold shutdown. (See Subsection 7.4.1 for details.)
Service Water Pumps
2A-39012B-3901
Unit 3 service water pumps 3A-3901, 3B-3901, and 2/3-3901, which are powered from SWGR 33 and 34, are available independent of the Unit 2 reactor building. The normal feeds to SWGR 23 and 24 are disabled.
TCV-2-3904ATCV-2-3904BTCV-2-3904C
Spurious operation concern. These valves fail open, which is the position necessary for cold shutdown.
ELECTRICAL EQUIPMENT
Division I The 2/3 diesel generator is operable from the 2/3 diesel generator room (Fire Zone 9.0.C, Fire Area RB-2/3). See Subsections 4.2.1 and 6.2.3.1 for the modifications identified in the Hot Shutdown Analysis to ensure this operability. All other Unit 3 Division I components and associated circuits are independent of the Unit 2 reactor building except for 4-kV Buses 23-1 to 33-1 breaker interlock control cables which can be manually isolated at SWGR.
Division II All Unit 3 diesel generator and Unit 3 Division II components and associated circuits are independent of the Unit 2 reactor building.
250-Vdc Primary feed to Unit 3 is from Unit 2, however, a secondary feed can be made from TB 250- Vdc MCC#3. Unit 2 250-V valve can be operated manually.
125-Vdc Unit 2 motor operators will be temporarily connected to Unit 3 switchgear for power and control via temporary power cable connections as described above. Therefore, no 125-Vdc to Unit 2 in necessary. All Unit 3 125-Vdc is independent of the Unit 2 reactor building.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-10
TABLE 4.2-3
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE LPCI/CCSW SYSTEM ASSUMING A FIRE IN THE UNIT 2 REACTOR BUILDING
Component Manual Action/Repair
MECHANICAL EQUIPMENT
LPCI Pumps
2C-15022D-1502
A temporary cable connection for the pumps to SWGR 33-1 or 34-1 in Unit 3 can be provided. Procedures to manually start pumps at the SWGR are available. (See Subsection 7.4.1 for details.)
CCSW Pumps
2C-1501-442D-1501-44
These pumps will be powered by a temporary feed from SWGR 33 and 34 if normal power feed to the pump cannot be established (see Subsection 7.4.1 for details.
LPCI Valves
MO2-1501-22BMO2-1501-3B
MO2-1501-21BMO2-1501-5CMO2-1501-5DMO2-1501-27BMO2-1501-28BMO2-1501-18BMO2-1501-19BMO2-1501-38BMO2-1501-20BMO2-1501-11BMO2-1501-32BMO2-1501-13B
Disable the feed and manually position the valve.
Of concern in regard to spurious operation only. Disable the feed and manually position the valve.
Target Rock/ElectromaticRelief Valves
2-203-3A2-203-3B2-203-3C2-203-3D2-203-3E
Temporary 125-Vdc power connection to the drywell penetration can be provided. Procedures to manually operate these valves are available. (See Subsection 7.4.1 for details.)
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.2-11
TABLE 4.2-3
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE LPCI/CCSW SYSTEM ASSUMING A FIRE IN THE UNIT 2 REACTOR BUILDING
Component Manual Action/Repair
CCSW Pump Coolers
2-5700-30A2-5700-30B
A temporary cable connection can be provided to an operable 480-V MCC in Unit 3. Procedures to locally start cooler fans are available. (See Section 7.4.1 for details.)
LPCI Emergency Air Cooler
2-5746B A temporary cable connection can be provided to an operable 480-V MCC in Unit 3. Procedures to locally start cooler fans are available. (See Section 7.4.1 for details.)
ELECTRICAL EQUIPMENT
Division I The 2/3 diesel generator is operable from the 2/3 diesel generator room (Fire Zone 9.0.C, Fire Area RB-2/3). See Subsections 4.2.1 and 6.2.3.1 for the modifications identified in the Hot Shutdown Analysis to ensure this operability. All other Unit 3 Division I components and associated circuits are independent of the Unit 2 reactor building except for 4-kV Bus 33-1 to 23-1 breaker interlock control cables which can be manually isolated at SWGR.
Division II All Unit 3 diesel generator and Unit 3 Division II components and associated circuits are independent of the Unit 2 reactor building.
250-Vdc Primary feed to Unit 3 is from Unit 2, however, a secondary feed can be made from TB 250-Vdc MCC#3. Unit 2 250-V valve can be operated manually.
125-Vdc Unit 2 motor operators will be temporarily connected to Unit 3 switchgear for power and control via temporary power cable connection as described above. Therefore, no 125-Vdc to Unit 2 is necessary. All Unit 3 125-Vdc is independent of the Unit 2 reactor building.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9 .
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.3-1
4.3 Unit 2 Primary Containment (Fire Area 1.2.2)
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-3 through F-6.
4.3.1 Hot Shutdown Analysis
The Unit 2 primary containment (Zone 1.2.2) is separated from the rest of the reactor building by a 3-hour rated fire barrier. The primary containment is inerted, thus, a fire cannot start and a safe shutdown can be achieved and maintained using any of the shutdown methods.
4.3.2 Cold Shutdown Analysis
The Technical Specifications require that the drywell be inerted during normal reactor operation. Therefore, no fire is postulated. The mechanical equipment associated with cold shutdown located in the drywell is identified in Table 4.3-1.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.3-2
TABLE 4.3-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE DRYWELLFire Zone 1.2.2 Fire Zone 1.2.1Shutdown Cooling Shutdown Cooling1. Recirculation Loop A Valves 1. Recirculation Loop A ValvesMO2-0202-4AMO2-0202-5A
MO3-0202-4AMO3-0202-5A
2. Recirculation Loop B Valves 2. Recirculation Loop B ValvesMO2-0202-4BMO2-0202-5B
MO3-0202-4BMO3-0202-5B
3. RBCCW Valve MO2-3706 3. RBCCW Valve MO3-37064. SC Valves 4. SC ValvesMO2-1001-1AMO2-1001-1B
MO3-1001-1AMO3-1001-1B
LPCI DIV. II LPCI DIV. II1. Target Rock Valve 2-203-3A 1. Target Rock Valve 3-203-3A2. Electromatic Relief Valves 2. Electromatic Relief Valves2-203-3B2-203-3C2-203-3D2-203-3E
3-203-3B3-203-3C3-203-3D3-203-3E
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.4-1
4.4 Unit 3 Reactor Building Fire Area RB3-I
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-3 (Fire Zone 1.4.1), F-4 (Fire Zone 1.1.1.5.C), F-5 (Fire Zone 1.1.1.5.B) and F-6 (Fire Zone 1.1.1.5.A).
4.4.1 Hot Shutdown Analysis
For a fire in RB3-I, the HPCI system shutdown path D (Table 3.1-9), will be used to shut down the unit. Diesel generator 3 will be used to power essential equipment. Control rod drive pump 3B is available for reactor water makeup if the operator chooses to use the HPCI turbine for steam condensing only. The electromatic relief valves are available for initial pressure control except for Fire Zone 1.4.1. In this zone the target rock valve and the safety valves are available for pressure control. The LPCI system and containment cooling service water system are available for suppression pool cooling.
All necessary equipment may be operated from the control room. Local instrumentation is used for monitoring Reactor Pressure and Reactor Water Level indication. This fire area contains no essential or associated cables for the HPCI shutdown path D.
4.4.2 Cold Shutdown Analysis
For the cold shutdown analysis, the Unit 3 reactor building was analyzed as a single fire area in Section 4.5.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.5-1
4.5 Unit 3 Reactor Building Fire Area RB3-II
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-2 (Fire Zones 1.1.1.1, 11.1.1, and 11.1.2), F-3 (Fire Zones 1.1.1.2 and 1.3.1), F-4 (Fire Zone 1.1.1.3), F-5 (Fire Zone 1.1.1.4), F-6 (Fire Zone 1.1.1.5.D) and F-6 (Fire Zone 1.1.1.6).
4.5.1 Hot Shutdown Analysis
Isolation condenser shutdown path A1 (Table 3.1-4) is used to shut down Unit 3 using Unit 2 equipment and interunit crossties independent of this fire area. Since the Unit 3 4-kV switchgear, 480-V switchgear, 250-V MCC's and 125-V reactor building distribution center are located in this fire area, the 2/3 diesel generator is used to power essential equipment via the Unit 2 power train. Control rod drive pump 2A is available for reactor water makeup. The electromatic relief valves are not available for initial pressure control but the target rock valve and safety valves are available. Makeup to the isolation condenser is available from either isolation condenser makeup pump. Service water pump 2A is available for cooling of the CRD pump and for makeup to the isolation condenser, if long-term operation is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source. Local instruments are used to monitor Reactor Pressure and Reactor Vessel Water level. Instruments for monitoring Torus temperature and level are available in the control room.
The necessary control rod drive pump and service water pump are powered from Unit 2 and are available to support Unit 3 shutdown through mechanical crossties. The bus duct from the 2/3 diesel generator to 4-kV switchgear 33-1 is routed in this area. A fault on the bus duct would not affect operation of the diesel generator because a 4-kV breaker in the diesel generator room would isolate this feed from the diesel generator. The 2/3 diesel generator would remain available to provide power via Unit 2 (see Subsection 6.2.3). All Unit 3 cables routed in this area that could affect control and excitation of the 2/3 diesel generator and its auxiliaries are isolated in the diesel generator room to permit local starting and operation. Cables to the 2/3 diesel generator from Unit 2 and the bus duct from the 2/3 diesel generator to SWGR 23-1 pass through the corner of Fire Zone 1.1.1.2 nearest to the diesel generator room. These cables are provided with a 1-hour fire wrap. See Subsections 6.2.3.1.5 and 6.3.3.2 and Section 4.7 of the Exemption Requests (F.P.R. Volume 4). Redundant 125-Vdc control power is available from Unit 2. Redundant power feeds to the 2/3 diesel generator auxiliaries (room ventilation fan and fuel oil transfer pump) are available from Unit 2. Local transfer switches have been installed in the 2/3 diesel generator room to isolate the Unit 3 feeds. See Subsection 6.2.3.1.
Cables and power supplied for Unit 3 isolation condenser valves are located in this fire area. All isolation condenser motor-operated valves are independent of this fire area and are accessible for manual operation except for valves MO3-1301-1 and MO3-1301-4 which are located in the drywell. The normal power feeds to these drywell valves are routed through Fire Zone 1.1.1.2 from 480-V MCC 38-1 to the drywell penetrations in Fire Zone 1.4.1 (part of RB3-I). To ensure that these valves will be open as required for safe shutdown, alternate power feeds have been routed to Unit 3 drywell penetrations in Fire Zone 1.4.1 from Unit 2 (see Subsection 6.2.2.4). The normal access to valves MO3-1301-2 and MO3-1301-3, located in the isolation condenser pipe chase (RB3-I), is through fire doors located at roughly 47/M on both the 545-foot 6-inch
AMENDMENT 19JUNE 2001
DRESDEN 2&3
4.5-2
elevation and the 570-foot 0-inch elevation. Access to the pipe chase is also available from the 589-foot 0-inch elevation in Fire Area RB3-I. Intervening grating has been cut and access ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area (see Subsection 6.2.2.6). Vent valves AO3-1301-17 and AO3-1301-20 fail in the closed position. In the event these valves fail to close, manual valve 3-1301-16 may be closed to isolate this line. Manual operation of valves MO3-4399-74 or MO3-4102 and MO3-1301-10 may be required to add makeup water to the isolation condenser.
Associated cables routed in this zone include LPCI circuits, core spray circuits, primary containment isolation circuits, and main steam isolation circuits. The LPCI and core spray circuitry are associated with the 4-kV power distribution. However, since the Unit 2 power train is used for this zone, faults on these circuits will not affect safe shutdown. The primary containment isolation, and main steam isolation circuits are associated with isolation condenser valves. However, the drywell valves will be controlled from the alternate power source by isolating the automatic circuitry and the power train to the remaining valves will be deenergized and the valves operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown. Spurious auto blowdown initiation is prevented by manual operation of the ADS Auto-blowdown Inhibit Switch installed at the MCB (see Subsection 6.2.2.8) and spurious operation of the individual relief valves is prevented by placing the handswitch of the Electromatic relief valves (ERV’s) and the Target Rock safety/relief valve control switches in the "OFF" position and by racking out the circuit breakers that supply 125-Vdc power to these valves.
Cable discrepancies within RB3-II and their resolution are presented in Appendix A. A discussion of the instrumentation available to the operators is in Subsection 3.1.1.1.5.
The refueling floor of Fire Zone 1.1.1.6 and Fire Zone 1.1.1.5.D contains no safe shutdown equipment or cabling but is considered part of Fire Area RB3-II. Therefore, the isolation condenser shutdown path B (Table 3.1-6), which would normally be used in case of loss of offsite power, can be utilized for a postulate fire in these fire zones.
There are no cable discrepancies in Fire Zone 1.1.1.6.
4.5.2 RB3-I and RB3-II Cold Shutdown Analysis
A significant amount of electrical and mechanical equipment necessary for cold shutdown is located in the Unit 3 reactor building Fire Areas RB3-I and RB3-II. The reactor building is divided into fire zones by floor elevations and rated fire barriers on a particular floor. These floor slabs present a substantial barrier to the spread of fire. However, they are not fire rated. Additionally, the combustible loading is low and area-wide automatic fire detection would ensure that the fire was detected and extinguished before it spread to adjacent floor elevations disabling the mechanical components and their operators. See the Fire Hazards Analysis, Sections 3.4 and 3.5 (F.P.R. Volume 1), and Section 4.10 of the Exemption Requests (F.P.R. Volume 4) for a detailed justification of this assumption.
The mechanical and electrical equipment necessary for cold shutdown and located by fire zone
AMENDMENT 19JUNE 2001
DRESDEN 2&3
4.5-3
are identified in Table 4.5.1. The cable and equipment in the reactor building are shown on the drawings listed below.
Fire ZoneF Series Drawings
Cold Shutdown Method
1.1.1.1 F-2 Shutdown Cooling
1.1.1.2 F-3 Shutdown Cooling
1.1.1.3 F-4 LPCI
1.1.1.4 F-5 Shutdown Cooling
1.1.1.5.A,B,C,D F-4, F-5, F-6 Shutdown Cooling
1.1.1.6 F-7 Shutdown Cooling
1.3.1 F-3 LPCI
1.4.1 F-3 Shutdown Cooling
11.1.1 F-2 Shutdown Cooling
11.1.2 F-2 Shutdown Cooling
In the Unit 3 reactor building fire areas, the shutdown cooling system can be used for cold shutdown in every fire zone except for the mezzanine floor, Fire Zone 1.1.1.3 (Fire Area RB3-II) and the shutdown cooling pump room, Fire Zone 1.3.1 (Fire Area RB3-II). On the mezzanine floor, the presence of the RBCCW pumps precludes the use of the shutdown cooling system. In the shutdown cooling pump room, the presence of the shutdown cooling pumps precludes the use of the shutdown cooling systems.
Table 4.5-2 identifies the manual actions and repairs necessary to achieve cold shutdown using shutdown cooling. The actions identified in this table conservatively assume the loss of all electrical cable and equipment in the Unit 3 reactor building. Electrical power to Unit 3 equipment is provided by temporary connections to switchgear and motor control centers in Unit 2. Manual handwheel operation of accessible valves is assumed. Modifications identified in the hot shutdown analysis Subsection 6.2.3.1 provide capability to operate the 2/3 diesel generator independent of fire damage in Unit 3. Also, Unit 2 diesel generator and auxiliaries are independent of the Unit 3 reactor building.
Table 4.5-3 identifies the manual actions and repairs necessary to achieve cold shutdown using the LPCI method.
Additionally, redundant mechanical components of the selected cold shutdown path are in the same fire zone in two instances. The justification for why a fire will not affect both redundant components is given below.
AMENDMENT 13JUNE 2001
DRESDEN 2&3
4.5-4
1. Basement Floor (Fire Zone 1.1.1.1)
Valves MO3-1001-5A, MO3-1001-5B, MO3-3702, and MO3-3703 are located in this fire zone and are associated with the shutdown cooling method. The shutdown cooling method would still be available based on the following justification.
MO3-1001-5AMO3-1001-5B
These valves are located 180! apart on opposite sides of the torus. These valves are in separate loops; as stated in Subsection 3.2.1 only one loop is normally used. Therefore, only one of the two valves needs to be opened. They can be handwheel operated. A single fire would not disable mechanical operation of both valves due to the physical separation, low combustible loading, and lack of intervening combustibles. See Fire Hazards Analysis, Subsection 3.5.1 (F.P.R. Volume 1).
MO3-3702MO3-3703
These valves are normally open and must remain so. The only cables in this zone are from the limit switches and the 480-V power cable. A fault in the limit switch and 480-V power cable cannot cause these valves to change position.
2. Ground Floor (Fire Zone 1.1.1.2)
LPCI Valves MO3-1501-27B and MO3-1501-28B are located in this fire zone and are associated with the LPCI/CCSW method. The LPCI/CCSW method would still be available based on the following justification.
LPCI Valve MO3-1501-27BLPCI Valve MO3-1501-28B
These valves are in the piping to the containment spray header and are not needed for the LPCI cold shutdown system. They are to have an adverse effect on cold shutdown. The simultaneous opening of two normally closed motor-operated valves in series is not credible and is not postulated except in a high-low pressure interface. This is not a high-low pressure interface.
DRESDEN 2&3 AMENDMENT 16JUNE 2007
4.5-5
TABLE 4.5-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 3 REACTOR BUILDINGFIRE AREAS RB3-I AND RB3-II
Fire Zone 1.1.1.1
Shutdown Cooling
1. SC Valve MO3-1001-5A2. SC Valve MO3-1001-5B3. RBCCW Valve MO3-37024. RBCCW Valve MO3-3703
LPCI, Div. II
1. LPCI Valve MO3-1501-22B2. LPCI Valve MO3-1501-20B3. LPCI Valve MO3-1501-38B4. LPCI Valve MO3-1501-18B5. LPCI Valve MO3-1501-19B6. LPCI Valve MO3-1501-13B
Fire Zone 1.1.1.2
Electrical Equipment
1. 480-V MCC 38-12. 480-V MCC 39-13. 480-V MCC 39-74. 480-V MCC 38-7
LPCI, Div. II
1. LPCI Valve MO3-1501-21B2. LPCI Valve MO3-1501-27B3. LPCI Valve MO3-1501-28B
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-6
TABLE 4.5-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 3 REACTOR BUILDINGFIRE AREAS RB3-I AND RB3-II
Fire Zone 1.1.1.3
Electrical Equipment
1. 4-kV SWGR 33-12. 4-kV SWGR 34-1
Shutdown Cooling
1. SC Heat Exchangers 3A-1003, 3B-1003, 3C-10032. RBCCW Pumps 3A-3701, 3B-37013. RBCCW Heat Exchangers 3A-3702, 3B-37024. RBCCW Valve MO3-37015. RBCCW Valve MO3-37046. Service Water Valve TCV-3-3904A7. Service Water Valve TCV-3-3904B8. SC Valve MO3-1001-4A9. SC Valve MO3-1001-4B10 SC Valve MO3-1001-4C
Fire Zone - 1.1.1.4
Electrical Equipment
1. 480-V SWGR 382. 480-V SWGR 393. 250-Vdc Reactor Building MCC 3A4. 250-Vdc Reactor Building MCC 3B5. 125-Vdc Reactor Building Distribution Panel 3
Fire Zones 1.1.1.5.A, 1.1.1.5.B, and 1.1.1.5.C
NONE
Fire Zone 1.3.1
Shutdown Cooling
1. SC Pumps 3A-1002, 3B-1002, 3C-10022. SC Valves MO3-1001-2A, MO3-1001-2B, MO3-1001-2C
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-7
TABLE 4.5-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE UNIT 3 REACTOR BUILDINGFIRE AREAS RB3-I AND RB3-II
Fire Zone 1.4.1
Electrical Division I Penetrations
Fire Zone - 11.1.1
LPCI, Div. II
1. LPCI Pump 3C-15022. LPCI Pump 3D-15023. LPCI Emergency Air Cooler 3-5746B4. LPCI Valve MO3-1501-3B5. LPCI Valve MO3-1501-5C6. LPCI Valve MO3-1501-5D7. LPCI Valve MO3-1501-11B8. LPCI Valve MO3-1501-32B
Fire Zone 11.1.2
NONE
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-8
TABLE 4.5-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN THE UNIT 3 REACTOR BUILDING
Component Manual Action/Repair
MECHANICAL EQUIPMENT
Shutdown Cooling Pumps
3A-10023B-1002*3C-1002
A temporary cable connection for two pumps to SWGR-23-1 or 24-1 on the Unit 2 side can be is available. (See Subsection 7.4.1 for details.)
* Loop C is normally connected to fuel pool cooling.
Shutdown Cooling Valves
MO3-1001-2AMO3-1001-2BMO3-1001-2C
MO3-1001-4AMO3-1001-4BMO3-1001-4C
MO3-1001-5AMO3-1001-5B
MO3-1001-1AMO3-1001-1B
Disable feed and manually position the valve.
A temporary power cable from an operable 480-V MCC to Unit 3 drywell penetration can be provided. A procedure to locally operate valves is available. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO3-0202-4AMO3-0202-4B
A temporary power cable from an operable 480-V MCC to Unit 3 drywell penetrations can be provided. (See Subsection 7.4.1 for details.)
RBCCW Pumps
3A-37013B-3701
A temporary power cable connection for two pumps to SWGR 23-1 or 24-1 in Unit 2 can be provided. A procedure to start pumps at the SWGR is available. (See Subsection 7.4.1 for details.)
RBCCW Valves
3A-37013B-3701
Disable the feed and manually position the valve.
MO3-3706MO3-3702MO3-3703
This valve are normally open for drywell cooling. The drywell cooling function, while important, is not considered essential to cold shutdown. (See Subsection 7.4.1 for details.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-9
TABLE 4.5-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN THE UNIT 3 REACTOR BUILDING
Component Manual Action/Repair
Service Water Pumps
3A-39013B-3901
Unit 2 service water pumps 2A-301, 2B-3901, and 2/3-3901, which are powered from SWGR 23 and 24, are available independent of the Unit 3 reactor building. The normal feed to SWGR 33 and 34 are disabled.
TCV-3-3904ATCV-3-3904BTCV-3-3904C
Spurious operation concern. These valves fail open, which is the position necessary for cold shutdown.
ELECTRICAL EQUIPMENT
Division I The 2/3 diesel generator is operable from the 2/3 diesel generator room (Fire Zone 9.0.C, Fire Area RB-2/3). See Subsection 4.5.1, 6.2.3.1, and 6.3.3.2 for the modifications identified in the Hot Shutdown Analysis to ensure this operability. All other Unit 2 Division I components and associated circuits are independent of the Unit 3 reactor building except for the 4-kV Buses 33-1 and 23-1 breaker interlock control cables which can be manually isolated at SWGR.
Division II All Unit 2 diesel generator and Unit 2 Division II components and associated circuits are independent of the Unit 3 reactor building.
250-Vdc Primary feed to Unit 3 is from Unit 2, however, a secondary feed can be made from TB 250-Vdc MCC#3. Unit 2 250-V valve can be operated manually.
125-Vdc Unit 3 motor operators will be temporarily connected to Unit 2 switchgear for power and control via temporary power cable connections as described above. Therefore, no 125-Vdc to Unit 3 is necessary. All Unit 2 125-Vdc is independent of the Unit 3 reactor building.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-10
TABLE 4.5-3
ACTION TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE LPCI/CCSWSYSTEM ASSUMING A FIRE IN THE UNIT 3 REACTOR BUILDING
Component Manual Action/Repair
MECHANICAL EQUIPMENT
LPCI Pumps
3C-15013D-1501
A temporary cable connection for the pumps to SWGR 23-1 or 24-1 in Unit 2 can be provided. Procedures to manually start pumps at the SWGR are available. (See Section 7.4.1 for details.)
CCSW Pumps
3C-1501-443D-1501-44
These pumps will be powered by a temporary feed from SWGR 23 and 24 if normal power feed to the pump cannot be established (see Subsection 7.4.1. for details).
LPCI Valves
MO3-1501-22BMO3-1501-3B
Disable the feed and manually position the valve.
MO3-1501-21BMO3-1501-5CMO3-1501-5DMO3-1501-27BMO3-1501-28BMO3-1501-18BMO3-1501-19BMO3-1501-38BMO3-1501-20BMO3-1501-11BMO3-1501-32BMO3-1501-13B
Of concern in regard to spurious operation only. Disable the feed and manually position the valve.
Target Rock/Electromatic Relief Valves
3-203-3A3-203-3B3-203-3C3-203-3D3-203-3E
Temporary 125-Vdc power connection can be provided. Procedures to manually operate these valves are available. (See Section 7.4.1 for details.)
CCSW Pump Coolers
3-5700-30A3-5700-30B
A temporary cable connection can be provided to an operable 480-V MCC in Unit 2. Procedures to locally start cooler fans are available. (See Section 7.4.1 for details.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.5-11
TABLE 4.5-3
ACTION TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE LPCI/CCSWSYSTEM ASSUMING A FIRE IN THE UNIT 3 REACTOR BUILDING
Component Manual Action/RepairLPCI Emergency Air Cooler
3-5746B A temporary cable connection can be made to an operable 480-V MCC in Unit 2. Procedures to locally start cooler fans are available. (See Section 7.4.1 for details.)
ELECTRICAL EQUIPMENT
Division I The 2/3 diesel generator is operable from the 2/3 diesel generator room (Fire Zone 9.0.C, Fire Area RB-2/3). See Subsections 4.5.1, 6.2.3.1, and 6.3.3.2 for the modifications identified in the Hot Shutdown Analysis to ensure this operability. All other Unit 2 Division I components and associated circuits are independent of the Unit 3 reactor building except for the 4-kV Bus 33-1 and 23-1 breaker interlock control cables which can be manually isolated at SWGR.
Division II All Unit 2 diesel generators and Unit 2 Division II components and associated circuits are independent of the Unit 3 reactor building.
250-Vdc Primary feed to Unit 3 is from Unit 2, however, a secondary feed can be made from TB 250-Vdc MCC#3. Unit 2 250-V valve can be operated manually.
125-Vdc Unit 3 motor operators will be temporarily connected to Unit 2 switchgear for power and control via temporary power cable connection as described above. Therefore, no 125-Vdc is necessary. All Unit 2 125-Vdc is independent of the Unit 3 reactor building.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordanceRPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.6-1
4.6 Unit 3 Primary Containment (Fire Area 1.2.1)
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-3 through F-6.
4.6.1 Hot Shutdown Analysis
The Unit 3 primary containment (Area 1.2.1) is separated from the rest of the reactor building by a 3-hour rated fire barrier. The primary containment is inerted, thus, a fire cannot start and a safe shutdown can be achieved and maintained using any of the shutdown methods.
4.6.2 Cold Shutdown Analysis
The Technical Specifications require that the drywell be inerted during normal reactor operation. Therefore, no fire is postulated. The mechanical equipment associated with cold shutdown located in the drywell is identified in Table 4.3-1.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.7-1
4.7 2/3 Diesel Generator and HPCI Rooms (Fire Area RB-2/3)
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-2 (Fire Zones 11.1.3 and 11.2.3) and F-3 (Fire Zone 9.0.C).
4.7.1 Hot Shutdown Analysis
For a fire in Fire Area RB-2/3, which contains the 2/3 diesel generator room and the Unit 2 and Unit 3 HPCI rooms, isolation condenser shutdown paths E and F (Tables 3.1-10 and 3.1-11) will be used to shut down Units 2 and 3, respectively. Unit 2 and 3 diesel generators are used to power essential equipment. Control rod drive pumps 2B and 3B are available for reactor water makeup. The electromatic relief valves are available for initial pressure control, if necessary. Both isolation condenser makeup pumps are available for makeup to the isolation condenser. Service water pump 2B or 3B is available for cooling the CRD pumps and for makeup to the isolation condensers if long-term operation is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source.
All necessary equipment may be operated from the control room. Local instrumentation is used for monitoring Reactor Pressure and Reactor Water level. This area contains no essential or associated cables for shutdown methods E and F except for cables associated with the alternate feeds to the isolation condenser inboard valves. Since the controls for the alternate feeds are located in the 2/3 diesel generator room, the valves may be spuriously closed. To defeat this possibility, the isolation switch in Fire Zones 1.3.2 and 1.4.1 must be manually switched to the isolation position so that control is retained in the control room. In addition, the Division I switchgear 28(38) must be tied to the Division II switchgear 29(39) to ensure power to the inboard valves (Division I) and the dedicated diesel generator auxiliaries (Division II) simultaneously.
4.7.2 Cold Shutdown Analysis
The shutdown cooling method of cold shutdown is available independent of this fire zone. As seen on Table 4.7-1, only equipment associated with the 2/3 diesel generator is located in this zone. The Unit 2 and Unit 3 diesel generators are available and are independent of this zone.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.7-2
TABLE 4.7-1COLD SHUTDOWN EQUIPMENT CONTAINED IN FIRE AREA RB-2/3
Fire Zone - 9.0.C
Cold Shutdown Equipment Contained in the Fire Zone:
1. 2/3 Diesel Generator 2/3-52102. 2/3 Diesel Generator Supply Fan 2/3-57903. 2/3 Diesel Generator Fuel Oil Transfer Pump 2/3-5303
Fire Zone 11.1.3 NONE
Fire Zone 11.2.3 NONE
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.8-1
4.8 Turbine Building Eastern Zone Group (Fire Area TB-I)
Safe shutdown equipment and cabling located in these fire areas are shown on Drawings F-8 (Fire Zones 7.0.A, 8.2.5.A, 8.2.6.A, and 8.2.7), F-9 (Fire Zones 8.2.1.A and 8.2.2.A), F-10 (Fire Zones 8.1, 8.2.5.A, 8.2.5.B, and 9.0.A), and F-13 (Fire Zones 8.2.6.A and 8.2.6.B).
4.8.1 Hot Shutdown Analysis
For a fire in TB-I, the Eastern Zone Group of the turbine building, isolation condenser path B1 (Table 3.1-7) can be used to shut down Unit 2. Cable discrepancies in this zone group are associated with Unit 2 4-kV, 480-V, 250-Vdc, and 125-Vdc power. Also, the 4-kV switchgears 23 and 24, 480-V MCC's 25-2, 26-1, 28-2, 28-3, and 29-2, and the Unit 2 125-Vdc turbine building main and reserve buses are located in this area. Additional control cable discrepancies are associated with Unit 3. These cables originate in the control room and are in risers that pass outside of the control room and AEER to the Unit 3 cable tunnel. They are associated with the controls to breakers associated 4-kV Switchgear 33, 4-KV Switchgear 33-1, and 480-V Switchgear 38. The risers and pull boxes containing these cables are provided with 1-hour fire wraps. In addition, the area in the vicinity of the risers has suppression and detection systems installed. Therefore, the 2/3 diesel generator is used to power essential equipment via the Unit 3 power train. Control rod drive pump 3A is available for reactor water makeup via a mechanical crosstie. The electromatic relief valves may not be available for initial pressure control but the target rock valve and safety valves are available if necessary. Makeup to the isolation condenser is available from both isolation condenser makeup pumps. Service water pump 3A is available for cooling the CRD pump and for makeup to the isolation condenser if a long-term operation of the isolation condenser is necessary. Local instruments can be used to monitor reactor conditions.Additionally, the Fire Protection header has been connected to the CRD pump line as an alternate cooling source.
The necessary control rod drive pump and service water pump are powered from Unit 3 and are available to support Unit 2 shutdown through mechanical crossties. The isolation condenser makeup pumps can be operated locally from panels 2223-126A and 2223-126B located in fire zones 18.7.1.and 18.7.2. All cables routed in this zone group that could affect control and excitation of the 2/3 diesel generator and its auxiliaries were isolated in the diesel generator room to permit local starting and operation (see Subsection 6.2.3). Redundant 125-Vdc control power is available from Unit 3. Redundant power feeds to the 2/3 diesel generator auxiliaries (room ventilation fan and fuel oil transfer pump) are available from Unit 3. Local controls have been installed to isolate these feeds from possible spurious signals which might be a result of a fire in RB2-II (see Subsection 6.2.3.1). All isolation condenser valves are located in the reactor building and are accessible for manual operation except valves MO2-1301-1 and MO2-1301-4 which are located in the drywell. Since a fire in TB-I would affect the Unit 2 power train and control cable to all isolation condenser valves, alternate power feeds to the inaccessible valves have been installed independent of this zone group to ensure that the valves will be open as required for safe shutdown. The routing of these new cables is discussed in Subsection 6.2.1.4. The normal access to valves MO2-1301-2 and MO2-1301-3, located in the isolation condenser pipe chase (RB2-I), is through the fire doors to the pipe chase at 41/M on both the 545-foot-6-inch elevation and the 570-foot 0-inch elevation. Access to the pipe chase is also available from Elevation 589
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-2
feet 0 inches in Fire Area RB2-I. Intervening grating has been cut and access ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area (see Subsection 6.2.1.6). Vent valves AO2-1307-17 and AO2-1301-20 fail in the closed
position. In the event these valves fail to close, manual valve 2-1301-16 may be closed to isolate the line. Manual operation of valves MO2-4399-74 or MO2-4102 and MO2-1301-10 may be required to add makeup water to the isolation condenser.
The Unit 2 fuel oil transfer pump is located in this fire area and could potentially be affected by a fire in this area. If isolation condenser makeup is required for longer than 8 hours after shutdown is initiated, the diesel oil day tanks for the isolation condenser makeup pumps can be manually filled.
If one of the diesel makeup pumps runs out of fuel, the other pump may be started to provide makeup water.
Associated cables routed in this zone include LPCI circuits, core spray circuits, primary containment isolation circuits, process radiation monitoring circuits, and main steam isolation circuits. The LPCI and core spray circuitry is associated with the 4-kV power distribution. However, since the Unit 3 power train is used for this zone, faults on these circuits will not affect safe shutdown. The primary containment isolation, process radiation monitoring and main steam isolation circuits are associated with isolation condenser valves. However, the drywell valves will be controlled from an alternate location by isolating the automatic circuitry and the power train to the remaining valves will be deenergized and the valves operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown. Spurious auto blowdown initiation is prevented by manual operation of the ADS Auto-blowdown Inhibit Switch. This switch is installed at the MCB (See Subsection 6.2.1.8). Spurious operation of the individualrelief valves is prevented by placing the handswitch of the Electromatic Relief Valves (ERV’s) and the Target Rock Safety/Relief valve control switches in the “OFF” position and by removing power to these valves by pulling the fuses at auxiliary equipment room panel 902-32.
Cable discrepancies within TB-I and their resolutions are presented in Appendix A.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-3
4.8.2 Cold Shutdown Analysis
The shutdown cooling system is available for shutting down Unit 2 as a result of a fire in any of the zones within the Eastern Zone Group. As seen on Table 4.8-1, no mechanical equipment associated with the shutdown cooling method is located in this zone group.
A significant amount of cable and electrical equipment is located in this area as seen on the drawings listed below:
Fire Zone F Series Drawings7.0.A F-88.1 F-108.2.1.A F-98.2.2.A F-98.2.5.A F-8, F-108.2.5.B F-108.2.6.A F-8, F-138.2.6.B F-138.2.7 F-89.0.A F-10
Table 4.8-2 lists the repairs necessary to establish onsite power and to establish operability of Unit 2 shutdown cooling method equipment. Both the 2/3 diesel generator and the Unit 3 diesel generator can be made operable.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-4
TABLE 4.8-1COLD SHUTDOWN EQUIPMENT CONTAINED IN FIRE AREA TB-I
Fire Zone 7.0.A.1
Electrical Equipment
1. 125-V Battery Charger 22. 125-V Battery Charger 2A3. Turbine Building 125-Vdc Main Bus 24. Battery Charger 2/35. Turbine Building 250-Vdc MCC 26. 250-V Battery Charger 27. Turbine Building 125-V Reserve Bus 2Fire Zone 7.0.A.2
Electrical Equipment
1. 125-V BatteriesFire Zone 7.0.A.3
Electrical Equipment
1. 250-V BatteriesFire Zone 8.2.1.A
NONE
Fire Zone 8.2.2.A
LPCI Div. II
1. CCSW Pump 2C-1501-442. CCSW Pump 2D-1501-443. CCSW Pump Cooler 2-5700-30C4. CCSW Pump Cooler 2-5700-30D
Fire Zone 8.2.5.A
Electrical Equipment
1. MCC 29-2
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-5
TABLE 4.8-1COLD SHUTDOWN EQUIPMENT CONTAINED IN FIRE AREA TB-I
Fire Zone 8.2.5.B
NONEFire Zone - 8.2.6.A
Electrical Equipment
1. 480-V MCC 28-22. 4-kV SWGR 233. 4-kV SWGR 244. 480-V MCC 28-3Fire Zone 8.2.6.B
NONE
Fire Zone 8.2.7
NONEFire Zone 9.0.A
Electrical Equipment
1. Unit 2 Diesel Generator 2-52102. Unit 2 Diesel Generator Supply Fan 2-57903. Unit 2 Diesel Generator Fuel Oil Transfer Pump 2-5203
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-6
TABLE 4.8-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-I
Component Manual Action/RepairMECHANICAL EQUIPMENTShutdown Cooling Pumps
2A-10022B-10022C-1002
These pumps can be powered from SWGR 23-1 and 24-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
Shutdown Cooling Valve
MO2-1001-2AMO2-1001-2BMO2-1001-2CMO2-1001-4AMO2-1001-4BMO2-1001-4CMO2-1001-5AMO2-1001-5B
MO2-1001-1AMO2-1001-1B
Disable the feed and manually position the valve.
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO2-0202-4AMO2-0202-4BMO2-0202-5AMO2-0202-5B
Procedures are available to make repairs to isolate existing control circuits and locally operate the valves at the MCC. Power is available to Division I and Division II MCC's as described below. (See Subsection 7.4.1 for details.)
RBCCW Pumps
2A-37012B-3701
These pumps can be powered from SWGR 23-1 and 24-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
RBCCW Valves
MO2-3701MO2-3704
Disable the feed and manually position the valve.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-7
TABLE 4.8-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-I
Component Manual Action/RepairMO2-3702MO2-3703MO2-3706
Spurious operation concern only. Procedures are available to isolate existing control circuits and operate at MCC.
Service Water Pumps
2A-39012B-39012/3-3901
TCV-2-3904ATCV-2-3904BTCV-2-3904C
The power and control to the two Unit 3 service water pumps are unaffected by the fire.
Spurious operation concern only. These valves fail in the open position.
ELECTRICAL EQUIPMENTDivision I ac Power System Control and operation of the 2/3 diesel generator is ensured
in the hot shutdown analysis for TB-I. All 2/3 diesel generator components and auxiliaries and SWGR breakers have isolation and manual control capability installed. (See Subsections 4.8.1 and 6.2.3.1.) 125-Vdc control power can be established as discussed below. Procedures exist to ensure the availability of Division I ac power.
Division II ac Power System Unit 2 diesel generator and its auxiliaries may not be operable. However, Division II power can be provided to Unit 2 via the crosstie between SWGR 34-1 and 24-1. Procedures are available to establish the crosstie between SWGR 34-1 and 24-1. Unit 3 Division II power is available independent of Unit 2 Eastern Zone Group (TB-I) except for the following associated cables. 125-Vdc control power to 4-kV and 480-V SWGR can be established as discussed below. Procedures exist to ensure the availability of Division II ac Power.
Division I 125-VdcControl Power System
A temporary 125-V power cable connection must be from unit 3 reactor building 125-V distribution panel 3 to the Unit 2 reactor building 125-V distribution panel 2 to establish control power to SWGR 23-1, 24-1, 28 and 29. A procedure is available to ensure the availability of 125-Vdc power to Unit 3.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.8-8
TABLE 4.8-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 2 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-I
Component Manual Action/Repair250-Vdc Power System A fire in the Eastern Zone Group could disable normal
250-Vdc power to both Units 2&3. A procedure is available to establish reserve feed to Unit 3. (See Subsection 7.4.1) Unit 2 250-Vdc power-oriented valves have handwheel operation capability.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.9-1
4.9 Turbine Building Central Zone Group (Fire Area TB-II)
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-10 (Fire Zone 8.2.5.C), F-11 (Fire Zone 8.2.5.C), F-13 (Fire Zone 8.2.6.C) and F-14 (Fire Zone 8.2.6.C).
4.9.1 Hot Shutdown Analysis
For a fire in TB-II, the Central Zone Group, shutdown of Units 2 and 3 can be accomplished with shutdown paths A2 and B2 (Tables 3.1-5 and 3.1-8) which utilize Unit 2 and 3 equipment and are powered by the 2/3 diesel generator.
Cable discrepancies in this zone group include cables associated with Unit 2 480-Vac power, 2/3 diesel generator control metering and excitation, 2/3 diesel generator room supply fan and 2/3 diesel generator cooling water pump. Unit 3 cable discrepancies include cable associated with 4-kV, 480-V and 125-Vdc power. However, the required circuit breakers can be isolated by existing isolation switches at the switchgear to prevent spurious signal that may result from a fire in the control cables. The switchgear can then be operated locally, if necessary. (See Subsections6.2.1.2 and 6.2.2.2.) Transfer switches in 2/3 diesel generator auxiliary power feed cable prevent a fault in Unit 2 cable from affecting the Unit 3 feed. The 2/3 diesel generator can be started and controlled locally in Fire Zone 9.0.C (see Subsection 6.2.3.1). The Unit 3 feeds to the 2/3 diesel generator auxiliaries are protected by a 1-hour barrier and automatic suppression and detection in Fire Area TB-II and will be available to provide power to the auxiliaries for a fire in this area. (See Subsection 6.3.4.4.)
The electromatic relief valves may not be available for initial pressure control but the target rock valve and safety valves are available if necessary. Control rod drive pumps 2A and 3A are available for reactor water makeup. Both isolation condenser makeup pumps are available for makeup to the isolation condenser. Service water pump 2A (or 3A not required/credited) is available for cooling the CRD pumps and for makeup to the isolation condensers if long term operation is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source. The control rod drive pump can be operated from the control room. Reactor pressure and level can be monitored through local indicators in the reactor building.
The 2/3 diesel generator feed breaker control logic has been modified to allow the operator to supply power to both Units Division I swtichgear 23-1 and 33-1 simultaneously by manually overriding the unit selection logic (see Subsection 6.2.3.2.6).
Control cables for isolation condenser valves MO2(3)-1301-2, MO2(3)-1301-3, MO2(3)-1301-10, and MO2(3)-4102 are located in this fire area. All of these valves are located in the reactor building and are accessible for manual operation. The normal access to valves MO2(3)-1301-2 and MO2(3)-1301-3, located in the isolation condenser pipe chase (RB2(3)-I), is through the fire doors to the pipe chase at 41/M (47/M for Unit 3) on both the 545-foot 6-inch elevation and 570-foot 0-inch elevation. Access to the pipe chase is also available from Elevation 589 feet 0 inches in Fire Area RB2(3)-I. Intervening grating has been cut and access ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-2
(see Subsections 6.2.1.6 and 6.2.2.6). Cables for valves MO3-1301-1 and MO3-1301-4 are located in this fire area. These valves are in the drywell and are not accessible for manual operation. However, alternate feeds have been installed to these valves independent of this fire area. These feeds, operated from Fire Zone 9.0.C, can be used to open the inboard valves in the event that faults on the cables in TB-II cause them to spuriously close (see Subsection 6.2.3.1.6). Vent valves AO3-1301-17 and AO3-1301-20 fail in the closed position as required for safe shutdown. In the event that they fail to close, manual valve 3-1301-16 may be locally closed to isolate this line. Manual operation of valves MO2-4399-74, MO3-4399-74, MO2-4102, MO2-1301-10, MO3-4102 and MO3-1301-10 may be required to add makeup feedwater to the isolation condensers. Power and control cables for CRD Pump Discharge Valve MO2-0301-2B are located in this fire area. This valve is located in Fire Zone 8.2.2.A and available for manual operation if required.
Cables from 480V Bus 29 which energize 480V MCC 29-2 are routed through this fire area. A fire in this area could potentially affect these cables rendering the Unit 2 fuel oil transfer pump inoperable. If isolation condenser makeup is required at times greater than 8 hours after shutdown is initiated, the diesel oil day tanks for the isolation condenser makeup pumps can be manually refilled.
If one of the diesel makeup pumps runs out of fuel, the other pump may be started to provide makeup water.
The control cable for breakers feeding 480-V MCC 38-1 and 38-4 is located in this area. This control switch has been moved to Fire Area RB2/3 and the cable in the turbine building is no longer used (see Subsection 6.2.3.1.3).
Associated cables routed in this zone include Unit 2 and Unit 3 LPCI circuits, core spray circuits, primary containment isolation circuits, process radiation monitoring circuits, and main steam isolation circuits. The LPCI and core spray circuitry is associated with the 4-kV powerdistribution. However, since local control and isolation capability is provided, faults on these circuits will not affect safe shutdown (see Subsections 6.2.1.1 and 6.2.2.2). The primary containment isolation, process radiation monitoring, and main steam isolation circuits are associated with isolation condenser valves. However, the drywell valves will be controlled from an alternate location by isolating the automatic circuitry and the power train to the remaining valves will be deenergized and the valves operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown.
Cable discrepancies in Fire Area TB-II and their resolutions are presented in Appendix A.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-3
4.9.2 Cold Shutdown Analysis
The shutdown cooling system is available for shutting down both units as a result of a fire in any of the zones within the Central Zone Group. As seen in Table 4.9-1, no mechanical equipment associated with the shutdown cooling method is located in this zone group. However, MCC 39-2 and a significant amount of cable and electrical equipment are located in this zone group as seen on the drawings listed below:
Fire Zone F Series Drawings8.2.5.C F-10, F-118.2.6.C F-13, F-14
The repairs necessary to establish operability of both Unit 2 and Unit 3 shutdown cooling equipment are listed in Table 4.9-2. The presence of MCC 39-2 which feeds the Unit 3 diesel generator auxiliaries precludes using the Unit 3 diesel generator as an onsite power source. However, Table 4.9-2 indicates that both the 2/3 diesel generator and the Unit 2 diesel generator can be made operable.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-4
TABLE 4.9-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN FIRE AREA TB-II
Fire Zone 8.2.5.C
NONE
Fire Zone 8.2.6.C
Electrical Equipment
1. 480-V MCC 39-2
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-5
TABLE 4.9-2
ACTION TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-II
Component Manual Action/RepairUNIT 2 MECHANICAL EQUIPMENTShutdown Cooling Pumps
2A-10022B-10022C-1002
These pumps can be powered from SWGR 23-1 and 24-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
Shutdown Cooling Valve
MO2-1001-2AMO2-1001-2BMO2-1001-2CMO2-1001-4AMO2-1001-4BMO2-1001-4CMO2-1001-5AMO2-1001-5B
MO2-1001-1AMO2-1001-1B
Disable the feed and manually position the valve.
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO2-0202-4AMO2-0202-4BMO2-0202-5AMO2-0202-5B
Procedures are available to make repairs to isolate existing control circuits and locally operate the valves at the MCC. Power is available to Division I and Division II MCC's as described below. (See Subsection 7.4.1 for details.)
UNIT 3 MECHANICAL EQUIPMENTShutdown Cooling Pumps
3A-10023B-10023C-1002
These pumps can be powered from SWGR 33-1 and 34.1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-6
TABLE 4.9-2
ACTION TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-II
Component Manual Action/RepairShutdown Cooling Valves
MO3-1001-2AMO3-1001-2BMO3-1001-2C
MO3-1001-4AMO3-1001-4BMO3-1001-4C
MO3-1001-5AMO3-1001-5B
Disable the feed and manually position the valve.
Shutdown Cooling Valves
MO3-1001-1AMO3-1001-1B
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO3-0202-4AMO3-0202-4BMO3-0202-5AMO3-0202-5B.
Procedures are available to make repairs to isolate existing control circuits and locally operate the valves at the MCC. (See Subsection 7.4.1 for details.)
RBCCW Pumps
3A-37013B-3701
These pumps can be powered from SWGR 33-1 and 34-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
RBCCW Valves
MO3-3701MO3-3704
MO3-3702MO3-3703MO3-3706
Disable the feed and manually position the valve.
Spurious operation concern only. Procedures are available to isolate existing control circuits and operate at the MCC.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-7
TABLE 4.9-2
ACTION TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-II
Component Manual Action/RepairService Water Pumps
3A-39013B-3901
TCV-3-3904ATCV-3-3904BTCV-3-3904C
Power and control to Unit 2 Service Water Pumps are unaffected by the fire. NOTE: Pump 3A-3901 is available (not required/credited) due to modifications provided to ensure hot shutdown capability. (See Subsections 4.9.1, 6.2.2.2, 6.2.3.1, and 6.3.4.4.)
Spurious operation concern only. These valves fail in the open position, which is the position necessary for cold shutdown.
UNITS 2&3 ELECTRICAL EQUIPMENTDivision I ac PowerSystem (Unit 3)
All 2/3 diesel generator components and auxiliaries and Division I SWGR breakers have isolation and manual control capabilities installed. Protection including 1-hour wrap and suppression and detection is provided to all Unit 3 Division I cables in this fire area except for control cable 31561 which controls breaker 252-385 A and MCC 38-7. (See Subsections 4.9.1, 6.2.2.2, 6.2.3.1, and 6.3.4.4.) Procedures are available to isolate these circuits and locally control the breakers. 125-Vdc breaker control power is available as described below. Procedures exist to ensure the availability of Division I ac power.
Division II ac PowerSystem (Unit 2)
Procedures exist to ensure the availability of Division II ac power where required.
125-Vdc Control PowerSystem
Procedures exist to ensure the availability of 125-Vdc power where required.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.9-8
TABLE 4.9-2
ACTION TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-II
Component Manual Action/Repair250-Vdc Power System A fire in the Central Zone Group could disable normal 250-
V power to both Units 2 and 3.
250-Vdc to Units 2 RX Building 250-V MCC 2 can be established by closing the reserve feed breaker from TB 250-V MCC 2 to RB 250-Vdc MCC 2A until the battery is depleted because cables to both battery chargers could be affected.
250-Vdc to Unit 3 RX Building 250-Vdc MCC 3 can be established by closing the reserve feed breaker from TB 250-Vdc to Unit 3 RX Building 250-Vdc MCC 3 can be established by closing the reserve feed breaker from TB 250-Vdc MCC 3 to RB 250-Vdc MCC 3A.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.10-1
4.10 Turbine Building Western Zone Group (Fire Area TB-III)
Safe shutdown equipment and cabling located in this fire area are shown on Drawings F-9 (Fire Zones 8.2.1.B and 8.2.2.B), F-11 (Fire Zones 8.2.5.D, 8.2.5.E and 9.0.B), F-12 (Fire Zone 8.2.4) and F-14 (Fire Zones 6.1, 7.0.B, 8.2.6.D and 8.2.6.E).
4.10.1 Hot Shutdown Analysis
For a fire in TB-III, the Western Zone Group of the turbine building, isolation condenser path A1 (Table 3.1-4) can be used to shut down Unit 3. Cable discrepancies in this area are associated with Unit 3 4-kV, 480-V, 250-Vdc, and 125-Vdc power. Also, the 4-kV switchgears 33 and 34, 480 MCC's 35-2, 36-1, 38-2 and 38-3, and Unit 3 125-Vdc turbine building main and reserve buses are located in this area. Therefore, the 2/3 diesel generator is used to power essential equipment via the Unit 2 power train. Control rod drive pump 2A is available for reactor water makeup via a mechanical crosstie. The electromatic relief valves may not be available for initial pressure control but the target rock valve and safety valves are available if necessary. Makeup to the isolation condenser is available from both isolation condenser makeup pumps. Service water pump 2A is available for cooling the CRD pump and for makeup to the isolation condenser if a long-term operation of the isolation condenser is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source. Local instruments can be used to monitor reactor conditions.
The necessary control rod drive pump and service water pump are powered from Unit 2 and are available to support Unit 3 shutdown through mechanical crossties. All cables routed in this zone group that could affect control and excitation of the 2/3 diesel generator and its auxiliaries were isolated in the diesel generator room to permit local starting and operation (see Subsection 6.2.3.1). Redundant 125-Vdc control power is available from Unit 3. Redundant power feeds to the 2/3 diesel generator auxiliaries (room ventilation fan and fuel oil transfer pump) are available from Unit 2. Local controls have been installed to isolate these feeds from possible spurious signals which might be a result of a fire in this area (see Subsection 6.2.3.1).
All isolation condenser valves are located in the reactor building and are accessible for manual operation except valves MO3-1301-1and MO3-1301-4 which are located in the drywell. Since a fire in TB-II would affect the Unit 3 power train and control cable to all isolation condenser valves, alternate power feeds to these valves have been installed independent of this zone group to ensure that the valves will be open as required for safe shutdown. The routing of these new cables is discussed in Subsection 6.2.2.4. The normal access to valves MO3-1301-2 and MO3-1301-3, located in the isolation condenser pipe chase (RB3-I), is through the fire doors located at roughly 47/M on both the 545-foot 6-inch elevation and the 570-foot 0-inch elevation. Access to the pipe chase is also available from the 589-foot 0-inch elevation in Fire Area RB3-I. Intervening grating has been cut and access ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area (see Subsection 6.2.2.6). Vent valves AO3-1301-17 and AO3-1301-20 fail in the closed position. In the event these valves fail to close, manual valve MO3-1301-16 may be closed to isolate the line. Manual operation of valves MO3-4399-74 or MO3-4102 and MO3-1301-10 may be required to add makeup water to the isolation condenser.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.10-2
Associated cables routed in this zone include LPCI circuits, core spray circuits, primary containment isolation circuits, process radiation monitoring circuits, and main steam isolation circuits. The LPCI and core spray circuitry is associated with the 4-kV power distribution. However, since the Unit 2 power train is used for this zone, faults on these circuits will not affect safe shutdown. The primary containment isolation, process radiation monitoring, and main steam isolation circuits are associated with isolation condenser valves. However, the drywell valves will be controlled from the alternate power source by isolating the automatic circuitry and the power train to the remaining valves will be deenergized and the valves operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown. Spurious auto blowdown initiation is prevented by manual operation of the ADS Auto-blowdown Inhibit Switch installed at the MCB (see Subsection 6.2.2.8) and spurious operation of the individual relief valves is prevented by placing the handswitch of the Electromatic Relief Valves (ERV’s) and the Target Rock Safety/Relief valve control switches in the “OFF” position and by removing power to these valves by pulling fuses at Panel 2203-32.
Cable discrepancies within TB-III and their resolutions are presented in Appendix A.
4.10.2 Cold Shutdown Analysis
The shutdown cooling system is available for shutting down Unit 3 as a result of a fire in any of the zones within the Western Zone Group. As seen in Table 4.10.1, no mechanical equipment associated with the shutdown cooling method is located in this zone group.
However, a significant amount of cable and electrical equipment is located in this area as seen on the drawings listed below:
Fire Zone F Series Drawings6.1 F-147.0.B F-148.2.1.B F-98.2.4 F-128.2.5.D F-118.2.5.E F-118.2.6.D F-148.2.6.E F-149.0.B F-11
Table 4.10-2 lists the repairs necessary to establish onsite power and to establish operability of Unit 3 shutdown cooling method equipment. Both the 2/3 diesel generator and the Unit 2 diesel generator can be made operable.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
TABLE 4.10-1
COLD SHUTDOWN EQUIPMENT IN THE WESTERN ZONE GROUP
Fire Zone 6.1
Electrical Equipment
1. 125-V Battery Charger 32. 125-V Battery Charger 3A3. Turbine Building 125-Vdc Main Bus 34. Turbine Building 125-V Reserve Bus 35. 250-Vdc Battery Charger 36. Turbine Building 250 MCC 3
Fire Zone 7.0.B
Electrical Equipment
1. 125-V Batteries2. 250-V Batteries
Fire Zone 8.2.1.B
NONE
Fire Zone 8.2.2.B
LPCI, Div. II
1. CCSW Pump 3C-1501-442. CCSW Pump 3D-1501-443. CCSW Pump Cooler 3-5700-30C4. CCSW Pump Cooler 3-5700-30D
Fire Zone 8.2.4
NONE
Fire Zone 8.2.5.D
NONE
Fire Zone 8.2.5.E
NONE
4.10-3
DRESDEN 2&3 AMENDMENT 13JUNE 2001
Fire Zone 8.2.6.D
NONE
Fire Zone 8.2.6.E
Electrical Equipment
1. 480-V MCC 38-32. 480-V MCC 38-23. 4-kV SWGR 334. 4-kV SWGR 34
Fire Zone 9.0.B
Electrical Equipment
1. Unit 3 Diesel Generator 3-52102. Unit 3 Diesel Generator Supply Fan 3-57903. Unit 3 Diesel Generator Fuel Oil Transfer Pump 3-503
4.10-4
DRESDEN 2&3 AMENDMENT 13JUNE 2001
TABLE 4.10-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-III
Component Manual Action/Repair MECHANICAL EQUIPMENTShutdown Cooling Pumps
3A-10023B-10023C-1002
These pumps can be powered from SWGR 33-1 and 34-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
Shutdown Cooling Valves
MO3-1001-2AMO3-1001-2BMO3-1001-2CMO3-1001-4AMO3-1001-4BMO3-1001-4CMO3-1001-5AMO3-1001-5B
Disable the feed and manually position the valve.
MO3-1001-1AMO3-1001-1B
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO3-0202-4AMO3-0202-4BMO3-0202-5AMO3-0202-5B
Procedures are available to make repairs to isolate existing control circuits and locally operate the valves at the MCC. (See Subsection 7.4.1 for details.)
RBCCW Pumps
3A-37013B-3701
These pumps can be powered from SWGR 33-1 and 34-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
RBCCW Valves
MO3-3701MO3-3704
Disable the feed and manually position the valves.
4.10-5
DRESDEN 2&3 AMENDMENT 13JUNE 2001
TABLE 4.10-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-III
Component Manual Action/Repair MO3-3702MO3-3703MO3-3706
Spurious operation concern only.
Service Water Pumps
3A-39013B-3901
The power and control to the two Unit 2 service water pumps are unaffected by the fire.
TCV-3-3904ATCV-3-3904BTCV-3-3904C
Spurious operation concern only. These valves fail in the open position which is the position necessary for cold shutdown.
ELECTRICAL EQUIPMENTDivision I ac Power System All 2/3 diesel generator components and auxiliaries and
Division I SWGR breakers have isolation and manual control capability installed. (See Subsections 4.10.1 and 6.2.3.1.) Power to these components via Unit 2 is still available. 125-Vdc DC control power to 4-kV and 480-V SWGR is available as discussed below.
Division II ac Power System The Unit 3 diesel generator and auxiliaries may not be operable. However, Division II power can be provided to Unit 3 via the tie between SWGR 34-1 and 24-1. Procedures are available to establish the tie between SWGR 24-1 and 34-1. (See Subsection 7.4.1 for details.) The Unit 2 diesel generator is independent of this area. 125-Vdc control power to 4-kV and 480-V SWGR is available as discussed below.
125-Vdc Power System A temporary 125-V power cable connection must be established from Unit 2 reactor building 125-V distribution panel 2 to the Unit 3 reactor building 125-V distribution panel 3 to establish control power to SWGR 33-1, 34-1, 38 and 39. 125-Vdc power is available to Unit 2 except for the 125-Vdc reserve Bus 2 feed cables 32374 and 32375. (See Subsection 7.4.1 for details.)
A procedure is available to manually establish an alternate feed to the 125-V reserve bus 2B-1 from the Unit 2 125-V main bus 2 by closing a normally open tie breaker 125-V main bus. (See Subsection 7.4.1 for details.)
4.10-6
DRESDEN 2&3 AMENDMENT 13JUNE 2001
TABLE 4.10-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNIT 3 USING THE SHUTDOWNCOOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-III
Component Manual Action/Repair 250-Vdc Power System A fire in the Western Zone Group would disable normal
250-V power to both Units 2&3. A procedure is available to establish reserve feed to Unit 2 (see Subsection 7.4.1). Unit 3 250-Vdc powered valves have handwheel operation capability.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
4.10-7
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.11-1
4.11 Turbine Building Main Floor (Fire Area TB-IV)
4.11.1 Hot Shutdown Analysis
The main operating floor of the turbine building, Fire Area TB-IV, contains no Unit 2 safe shutdown equipment or cabling. No Unit 3 safe shutdown equipment is located in TB-IV and instrument cables are the only safe shutdown cabling located there. Therefore, isolation condenser path A for Unit 2 (Table 3.1-3) and path B for Unit 3 (Table 3.1-6), which would normally be used in case of loss of offsite power, can be used if shutdown is required as a result of a fire in Fire Area TB-IV. All major fire hazards in this zone are protected. Should a fire start on this floor, it is highly unlikely that it could spread to lower elevations where it could damage safe shutdown equipment.
4.11.2 Cold Shutdown Analysis
No cold shutdown equipment or cable is located in this area.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.12-1
4.12 Control Room and AEER (Fire Area TB-V)
Safe shutdown equipment and cabling located in this fire area are shown on Drawing F-8 (Fire Zones 2.0 and 6.2).
4.12.1 Hot Shutdown Analysis
A fire in the control room and auxiliary electrical equipment room fire area (TB-V) has the potential for causing the loss of control of all motor-operated equipment associated with both units. Shutdown of Unit 2 and Unit 3 can be accomplished with shutdown paths A2 and B2 (Tables 3.1-5 and 3.1-8) which utilize Unit 2 and Unit 3 equipment powered from the 2/3 diesel generator.
Control rod drive pumps 2A and 3A are available for reactor water makeup. The electromatic relief valves may not be available for initial pressure control but the target rock valve and safety valves are available if necessary. Both isolation condenser makeup pumps are available for makeup to the isolation condenser. Service water pump 2A is available to cool the CRD pump and for either Unit 2 or Unit 3 isolation condenser makeup if long-term operation is necessary. Additionally, the Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source. Local instruments will be used to monitor reactor conditions and support systems.
Cable discrepancies in this area include control functions associated with 4-kV and 480-V power for both units. However, the required circuit breakers can be isolated by existing isolation switches at the switchgear to prevent spurious signals which might result from a control room fire. (See Subsections 6.2.1.2 and 6.2.2.2.) The switchgear can then be operated locally, if necessary. The diesel generator will also be started and controlled locally. Local control stations have been provided for the diesel fuel transfer pump, diesel cooling water pump, and diesel room vent fan. (See Subsection 6.2.3.1.)
The 2/3 diesel generator feed breaker control logic has been modified to allow the operator to supply power to both Unit’s Division I switchgear 23-1 and 33-1 simultaneously by manually overriding the unit selection logic. (See Subsection 6.2.3.1.6.)
Control cables for the control rod drive pumps, CRD discharge valves, isolation condenser makeup pumps, and service water pumps are located in this area. Local pushbutton stations have been installed for the control rod drive pumps. The isolation condenser pumps can be operated locally from panels 2223-126A and 2223-126B located in fire zones 18.7.1 and 18.7.2. These local controls will isolate faults on control room cables. Local isolation and control capability have also been installed for the service water pumps. (See Subsections 6.2.1.2, 6.2.1.3, 6.2.2.2 and 6.2.2.3). For the CRD discharge valves, 480 VAC power can be removed and valves manually operated in their local area.
Control cables to all isolation condenser valves are located in this area. All of these valves are accessible for manual operation except valves MO2(3)-1301-1 and MO2(3)-1301-4, which are
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-2
located in the respective drywells. To ensure that these valves will be open as required for the safe shutdown function in the event a fire in this area affects the normal power feeds, alternate feeds from an alternate power source have been installed along with local control capability located in the diesel generator 2/3 room as discussed in Subsection 6.2.1.4.
The normal access to valves MO2(3)-1301-2 and MO2(3)-1301-3, located in the isolation condenser pipe chase (RB2(3)-I), is through the fire doors to the pipe chase at 41/M (47/M for Unit 3) on both the 545-foot 6-inch elevation and 570-foot 0-inch elevation. Access to the pipe chase is also available from Elevation 589 feet 0 inches in Fire Area RB2(3)-I. Intervening grating has been cut and access ladders and platforms provided to ensure that these valves may be manually operated in the event of a fire in this area (see Subsections 6.2.1.6 and 6.2.2.6). Vent valves AO2-1301-17 and AO2-1301-20 fail in the closed position as required for safe shutdown. In the event these valves fail to close, manual valve 2-1301-16 may be locally closed to isolate this line. Manual operation of valves MO2-4399-74, MO3-4399-74, MO2-4102, MO2-1301-10, MO3-4102 and MO3-1301-10 may be required to add makeup feedwater to the isolation condensers.
Associated cables routed in this zone include LPCI circuits, core spray circuits, primary containment isolation circuits, process radiation monitoring circuits, and main steam isolation circuits. The LPCI and core spray circuitry is associated with the 4-kV power distribution. However, since the diesel generator and all necessary breakers will be operated locally, faults on these circuits will not affect safe shutdown. The primary containment isolation, process radiation monitoring, and main steam isolation circuitry are associated with isolation condenser valves. However, the drywell valves will be controlled locally from the alternate power source by isolating the automatic circuitry. The power train to the remaining valves will be operated manually. Therefore, faults on the associated circuitry will not prevent safe shutdown. Spurious auto blowdown initiation is prevented by manually tripping the 125-Vdc feeds to the auto blowdown logic at the 125-Vdc distribution panels in the turbine building. Additional protection from spurious auto blowdown is provided by placing the ADS “Auto Blowdown Inhibit” switch in the “INHIBIT” position and the ERV’s “Auto Blowdown MANUAL-OFF-AUTO” switch in the “OFF” position. These switches are located in the control room and they will be operated before control room evacuation (see Subsections 6.2.1.8 and 6.2.2.8).
Cable discrepancies in TB-V and their resolutions are presented in Appendix A.
4.12.2 Cold Shutdown Analysis
The shutdown cooling method is available for cold shutdown after a fire in this fire area. The equipment associated with cold shutdown and located in this area is identified in Table 4.12-1. Drawing F-8 shows the location of cable and equipment. No mechanical equipment necessary for the shutdown cooling method is located in this fire area. Only control equipment and cables are located in the control room (Fire Zone 2.0) and AEER (Fire Zone 6.2). Power cables to MCC 29-2 (Division II) and service water pump 2/3-3901 are routed through the AEER. The Unit 2 diesel generator auxiliaries are fed from MCC 29-2. Power to all Division I (2/3 diesel generator) equipment is available for Unit 2 and Division II (diesel generator 3) equipment for Unit 3. Table 4.12-2 lists the repairs necessary to control electrical equipment independent of these fire areas.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-3
TABLE 4.12-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN FIRE AREA TB-V
Fire Zone 6.2
1. 120/240 Essential Service Distribution Panel 902-492. 120/240 Instrument Bus 902-503. 120/240 Essential Service Distribution Panel 903-494. 120/240 Instrument Bus 903-50
Fire Zone 2.0
1. Control Panel 902-4 (Unit 2 Shutdown Cooling Controls)2. Control Panel 903-4 (Unit 3 Shutdown Cooling Controls)3. Control Panel 923-1 (Unit 2&3 RBCCW and Service Water Controls)4. Control Panel 902-8 (Unit 2 Auxiliary Power Controls)
Control Panel 903-8 (Unit 3 Auxiliary Power Controls)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-3
TABLE 4.12-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-V
Component Manual Action/Repair
UNIT 2MECHANICAL EQUIPMENT
Shutdown Cooling Pumps
2A-10022B-1002*2C-1002
These pumps can be powered from SWGR 23-1 and 24-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
*Loop C is normally connected to fuel pool cooling.
Shutdown Cooling Valve
MO2-1001-2AMO2-1001-2BMO2-1001-2CMO2-1001-4AMO2-1001-4BMO2-1001-4CMO2-1001-5AMO2-1001-5B
MO2-1001-1AMO2-1001-1B
Disable the feed and manually position the valve.
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO2-0202-4AMO2-0202-4B
Procedures are available to make repairs to isolate existing control circuits and locally operate the valves at the MCC. Power is available to Division I and Division II MCCs as described below. (See Subsection 7.4.1 for details.)
RBCCW Pumps
2A-37012B-3701
These pumps can be powered from SWGR 23-1 and 24-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-3
TABLE 4.12-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-V
Component Manual Action/Repair
RBCCW Valves
MO2-3701MO2-3704
Disable the feed and manually position the valve.
MO2-3702MO2-3703MO2-3706
Spurious operation concern only. Procedures are available to isolate existing control circuits and operate at MCC.
Service Water Pumps
2A-39012B-39012/3-3901
Local control capability exists for all service water pumps (see Subsections 4.12.1 and 6.2.1.2). Procedures areavailable to implement this capability.
TCV-2-3904ATCV-2-3904BTCV-2-3904C
Spurious operation concern only. These valves fail in the open position.
UNIT 3 MECHANICAL EQUIPMENT
Shutdown Cooling Pumps
3A-10023B-1002*3C-1002
These pumps can be powered from SWGR 33-1 and 34-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
*Loop C is normally connected to fuel pool cooling.
Shutdown Cooling Valves
MO3-1001-2AMO3-1001-2BMO3-1001-2C
MO3-1001-4AMO3-1001-4BMO3-1001-4C
MO3-1001-5AMO3-1001-5B
Disable the feed and manually position the valve.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-3
TABLE 4.12-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-V
Component Manual Action/Repair
MO3-1001-1AMO3-1001-1B
Procedures are available to make repairs to isolate existing control circuits and operate the valves locally at the MCC. (See Subsection 7.4.1 for details.)
Recirculation Piping Valves
MO3-0202-4AMO3-0202-4B
Procedures are available to make repairs to MO3-0202-5A circuits and locally operate the valves at the MCC. (See Subsection 7.4.1 for details.)
RBCCW Pumps
3A-37013B-3701
These pumps can be powered from SWGR 33-1 and 34-1. Division I and Division II power is available as described below. Procedures are available to locally operate the necessary breakers. (See Subsection 7.4.1 for details.)
RBCCW Valves
MO3-3701MO3-3704
Disable the feed and manually position the valve.
MO3-3702MO3-3703MO3-3706
Spurious operation concern only. Procedures are available to isolate existing control circuits and operate at the MCC.
Service Water Pumps
3A-39013B-3901
Local control capability exists for all service water pumps. (See Subsections 4.12.1 and 6.2.2.2.) Procedures are available to implement this capability.
TCV-3-3904ATCV-3-3904BTCV-3-3904C
Spurious operation concern only. These valves fail in the open position which is the position necessary for cold shutdown
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.12-3
TABLE 4.12-2
ACTIONS TO ACHIEVE COLD SHUTDOWN IN UNITS 2 AND 3 USING THE SHUTDOWN COOLING SYSTEM ASSUMING A FIRE IN FIRE AREA TB-V
Component Manual Action/Repair
UNIT 2&3 ELECTRICAL EQUIPMENT
Division I ac Power System All 2/3 diesel generator components and auxiliaries and Division I SWGR breakers have isolation and manual control capabilities installed. (See Subsections 4.12.1, 6.2.1.2, 6.2.2.2, and 6.2.3.1.) Repair procedures are available to establish local control for all other breakers. Procedures are available to implement this capability. All normal 125-V control power is available.
Division II ac Power System Power cables to MCC 29-2 are routed through the AEER. Therefore, the Unit 2 diesel generator is assumed to be unavailable.
Division II ac Power System Procedures are available to repair Unit 3 diesel generator control circuits and operate the diesel generator. Local breaker control is provided for breakers. (See Subsections 6.2.1.2 and 6.2.2.2.) All normal 125-V control power is available.
125-Vdc System The 125-Vdc system is not affected by a fire in this area.
250-Vdc System The 250-Vdc system is not affected by a fire in this area.
Process Monitoring Equipment
RPV Water Temp. Recirc Loop A If RPV water, shell and shell flange temperature indicatorsRPV Water Temp. Recirc Loop B are not available in the control room, then establishRPV Shell Temperature local indication monitoring capability in accordance RPV Flange Temperature with cold shutdown repair procedure DSSP-0200-T9.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.13-1
4.13 Crib House Fire Area 11.3
Safe shutdown equipment and cabling located in this fire area are shown on Drawing F-18.
4.13.1 Hot Shutdown Analysis
For the cribhouse, the dedicated shutdown path available depends on the location of the postulated fire. Fire protection measures have been taken in accordance with Appendix R to prevent the spread of fire from one area to another. These measures are described in the Fire Hazard Analysis (F.P.R. Volume 1), in Section 6.0, Proposed Modifications of this report, and in the Exemption Requests, Section 6.0 (F.P.R. Volume 4).
The analysis of the crib house can be divided into the following areas:A. Vicinity of the Unit 2 or Unit 3 diesel generator cooling water pumpsB. Vicinity of the 2/3 diesel generator cooling water pumpC. Vicinity of the service water pumps
Fire protection modifications have been made which ensure that either: 1) the 2/3 diesel generator cooling water pump is available, or 2) the 2 and 3 dedicated diesel generator cooling water pumps and at least one service water pump are available. See Subsection 6.3.5 for modifications made.
A. Unit 2 or Unit 3 Diesel Generator Cooling Water Pumps
For a fire in the crib house, isolation condenser shutdown path A (Table 3.1-3) will be used to shut down Unit 2 if the Unit 2 dedicated diesel generator cooling water pump (located on the lower level of the crib house) has been damaged. If the Unit 3 dedicated diesel generator cooling water pump (also located on the lower level of the crib house) has been damaged by a fire, isolation condenser shutdown path B (Table 3.1-6) will be used to shut down Unit 3.
The 2/3 diesel generator will be used to power the necessary equipment. The diesel will be cooled by the 2/3 diesel generator cooling water pump which remains free of fire damage as discussed in Subsection 6.3.5 of this report and Section 6.0 of the Exemption Requests (F.P.R. Volume 4). Control rod drive pumps 2A and 3A are available for reactor coolant makeup. The electromatic relief valves are available for initial pressure control, if necessary. Both isolation condenser makeup pumps are available to provide makeup to the isolation condenser. Service water pump 2A (or 3A not required/credited) is available to cool the CRD pumps and provide makeup to the isolation condensers if long-term operation is necessary. Additionally, The Fire Protection header has been connected to the CRD pump cooling line as an alt cooling source.
All necessary equipment can be operated from the control room. Local instrumentation is used to monitor Reactor Pressure and Reactor Water level.
Cable discrepancies in the crib house and their resolutions are presented in Appendix A.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
4.13-2
B. 2/3 DG Cooling Water Pump
Isolation condenser shutdown paths E and F will be used to shut down Unit 2 and Unit 3 respectively if the 2/3 diesel generator cooling water pump (located on the lower level of the cribhouse) has been damaged.
Diesel generators 2 and 3 will be used to power the necessary equipment. The diesel will be cooled by the dedicated cooling water pump which remains free of fire damage as discussed in Subsection 6.3.5 of this report and Section 6.0 of the Exemption Requests (F.P.R. Volume 4). Control rod drive pumps 2B and 3B are available for reactor coolant makeup. The electromatic relief valves are available for initial pressure control, if necessary. Both isolation condenser makeup pumps are available to provide makeup to the isolation condenser. Service water pump 2B or 3B is available to cool the CRD pumps and provide makeup to the isolation condensers if long-term operation is necessary. Additionally, The Fire Protection header has been connected to the CRD pump cooling line as an alternate cooling source.
All necessary equipment can be operated from the control room. Reactor instruments can be monitored in the control room.
C. Service Water Pumps
Only one of five service water pumps or backup fire water is needed to cool the CRD pumps for both units. The service water pumps are widely separated on the upper level of the crib house. A complete area suppression system is provided at this level. Curbs are provided to prevent combustible liquid spills from exposing more than half the floor simultaneously (see Subsection 6.3.5). The above measure ensures that at least one service water pump will be operable independent of a fire in this area. See Section 6.2 of the Exemption Requests (F.P.R. Volume 4).
4.13.2 Cold Shutdown Analysis
The shutdown cooling method is available for cold shutdown after a fire in this zone. Table 4.13-1 identifies mechanical and electrical equipment located in the zone. Drawing F-18 shows equipment and cable locations.
Hot shutdown fire protection measures described in the Fire Hazards Analysis, Section 4.13 (F.P.R. Volume 1), and the Cold Shutdown Exemption Requests, Section 6.2 (F.P.R. Volume 4) ensure that at least two service water pumps and two diesel generator cooling water pumps and their associated cable would not be damaged by a fire in this area.
The following fire protection measures ensure that at least two diesel generator cooling water pumps are available.
1. The transfer switch for the 2/3 diesel generator cooling water pump (see Subsection 6.2.3.1.4) in the crib house is protected with a 1-hour barrier. This modification, in conjunction with the addition of suppression and detection systems (discussed below), ensures that a fire affecting either of the dedicated diesel generator's cooling water pumps will not also disable the 2/3 diesel generator's cooling water pump.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.13-3
2. A curb is installed around the 2/3 diesel generator cooling water pump. This prevents the spread of any flammable liquids either from the 2/3 pumps to the dedicated cooling water pumps or from circulating water pumps to the 2/3 pump.
3. An automatic, open-head water suppression system is installed over the 2/3 diesel generator cooling water pump. As with the curbing, this modification aids in preventing a fire originating at the 2/3 pump from spreading and also prevents a fire outside the 2/3 pump region from affecting the 2/3 pump.
4. A thermal fire detection system is installed throughout the lower elevation of the crib house. This provides early warning of a fire in the region, allowing station personnel to respond rapidly and to extinguish a fire before significant damage can occur.
5. A ceiling level wet pipe sprinkler system is installed to protect the entire central area of the lower level (column/row 3.5-4.5/A-B). This provides additional assurance that a fire in the lower level would be quickly controlled and damage limited to one side of the crib house.
6. An open-head water spray system actuated by a linear thermal detector provides protection to all cable trays and conduit along the north, west, and east walls of the crib house.
The following fire protection measures ensure that at least two service water pumps will be available.
1. Curbs are installed along the entire length of column line B on the 509-foot 6-inch and 517-foot 6-inch elevations and along the entire length of column line 3.75 on the 509-foot 6-inch and 517-foot 6-inch elevations. The curbs prevent the spread of flammable liquids from the 517-foot 6-inch elevation of the upper level to the 509-foot 6-inch elevation as well as preventing the spread of flammable liquids from one side to the other on both elevations. In addition, the diesel fire pump day tank is enclosed in a curb with a drain line to the yard drain system to prevent diesel fuel oil from exposing the service water pumps.
2. A wet pipe sprinkler system is provided which covers the entire upper level of the crib house. This ensures that, should a fire start, it will be quickly contained so that at least two service water pumps and their cabling will remain free of fire damage.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.13-4
TABLE 4.13-1
COLD SHUTDOWN EQUIPMENT CONTAINED IN THE CRIB HOUSE
Fire Zone 11.3
Shutdown Cooling System
1. SW Pump 2A-39012. SW Pump 2B-39013. SW Pump 2/3-39014. SW Pump 3A-39015. SW Pump 3B-3901
Electrical Equipment
1. Unit 2 Diesel Generator Cooling Water Pump 2-3903B2. Unit 3 Diesel Generator Cooling Water Pump 3-3903B3. 2/3 Diesel Generator Cooling Water Pump 2/3-3903B
LPCI-Division II
1. Unit 2 Diesel Generator Cooling Water Pump 2-3903B2. Unit 3 Diesel Generator Cooling Water Pump 3-3903B
DRESDEN 2&3 AMENDMENT 13JUNE 2001
4.14-1
4.14 Radwaste Building (Fire Zones 14.1, 14.5 and 14.6)
The radwaste building contains no Unit 2 or Unit 3 hot or cold safe shutdown equipment or cabling.
DRESDEN 2&3 AMENDMENT 16JUNE 2007
4.15-1
4.15 Miscellaneous Structures
With the exception of the Isolation Condenser Pumphouse fire zones (18.7.1 & 18.7.2), the Dresden 2&3 miscellaneous structures contain no Unit 2 or Unit 3 hot or cold safe shutdown equipment or cabling. Therefore, the miscellaneous structures not physically attached to Dresden 2&3 structures would not affect safe shutdown.
4.15.1 Dresden Units 2&3 Safe Shutdown Analysis for a Dresden 1 Fire
The Dresden 2/3 structure connects to Unit 1 along column row 31, i.e., the Unit 2 turbine building east wall. This wall is generally constructed of unrated metal siding; however, the wall between the Auxiliary Electric Equipment Room and the Unit 1 Battery Room is 3-hour rated. The Unit 2/3 Control Room is isolated from adjacent Unit 1 areas by 3-hour rated walls, floor, and ceiling. The floor for the control room is supported on 3-hour fire protected structural steel. The combustible loading in the general area outside the Control Room is low except for directly under the control room, which has a concentration of cables, which are protected by automatic water-spray systems. Transient fire hazards in the area are administratively controlled.
If a fire were to start in the Unit 1 turbine building, it could affect Units 2 and 3 in two ways. The first would be a fire which would migrate from Unit 1 to the Unit 2 turbine building. This type of fire scenario would be no worse than a fire, which initiated in Unit 2 turbine building. An alternate shutdown path has been identified for a fire in the Unit 2 turbine building (Fire Area TB-I).
The second way a fire could affect Units 2 and 3 would be a fire that affected the Control Room. This fire could start in the Unit 1 Turbine Building near the control room or in adjacent areas at the same level as the control room. Fire rated construction of a 3-hour rating is provided to isolate the control room from a fire originating in these areas.
A fire of sufficient intensity could only occur under the Unit 1 Control Room floor. As statedbefore, the likelihood of a fire in the trays under the control room floor is remote due to administrative controls, automatic suppression systems and administrative control of ignition sources. Any fire in the Unit 1 Turbine Building near the Control Room would be detected by fire protection systems and quickly extinguished. In addition, structural steel in this area that supports the control room floor is protected with 3-hour rated fire proofing material.
A fire originating in the Unit 1 Turbine Building would have no greater effect on safe shutdown of Units 2 and 3 than a fire that originated in either the Control Room or the Unit 2 Turbine Building. For a fire in these areas, an alternate shutdown method has been identified which is independent of these areas.
DRESDEN 2&3 AMENDMENT 16JUNE 2007
4.15-2
4.15.2 Isolation Condenser Makeup Pump Rooms (Fire Zones 18.7.1 and 18.7.2)
These fire zones are separated from other fire areas by 3-hour rated barriers (See Fire Hazards Analysis Figure 3.3-27, Fire Protection Report, Volume 1). These fire zones contain equipment and cables used for Safe Shutdown paths A, A1, A2/B2, B, B1, E & F. Either IC make-up pump can be cross-tied to the Unit 2 or the Unit 3 Isolation Condenser. These pumps are the preferred source of Isocondenser makeup water. Additional means to provide Isocondenser makeup are identified in section 3.1.1.1.3 of the Safe Shutdown Report.
L
L
s... o+' (lJ U Vl d Vl (lJ (lJ
()! >
X I
AMENDMENT 12
DRESDEN ST AT ION UNITS 2 &c 3
.1-1 VALVES \/HOSE SPURIOUS OPERATION
COULD DEGRADE OPERABILITY OF SAFE SHUTDO\IN SYSTEMS
l
l
I > ........ (/)
2
~
> ~ (/)
L 0
..p u d Q; ~
__,
OJ lfl lfl OJ
>
D 2
D 2
AMENDMENT 12
DRESDEN STATION Units 2 &c 3
FIGURE 5.1-2
VALVES \./HOSE SPURIOUS OPERATION ~OULD CAUSE LOSS OFREACT•R INVENTORY
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.1-1
5.0 SUPPORTING ASSOCIATED CIRCUITS ANALYSIS
5.1 Valve Spurious Operation Analysis
5.1.1 Methodology
A review of the P&ID's was performed for Dresden Units 2&3 to assess the impact of spurious valve operation on the safe shutdown of the plant. Two cases were specifically considered. Case 1 examined those valves whose malfunction could impact the operation of the safe shutdown systems. Case 2 considered those valves whose malfunction could result in a loss of reactor inventory. The basis used in Cases 1 and 2 can be found illustrated in Figures 5.5-1 and 5.5-2, respectively. The Dresden 2 & 3 valves which fit either Case 1 or Case 2 are identified in Appendix B.
The assessment considered only electrically operated valve types which include Motor Operated (MO), Solenoid Operated (SO), Air Operated (AO), Pressure Controlled (PC), and Temperature Controlled (TC) Valves.
The concern over spurious operations or malfunctions of a valve or valve combination was resolved if any of the following criteria were met:
1. For valves where spurious operation was of concern, a valve combination was considered acceptable defense against adverse spurious operation if any of the following conditions were met: (a) there were two or more normally closed electrically operated valves in series and these valves did not constitute a high-low pressure interface; (b) there was at least one normally closed, manually operated valve in series; (c) there was a mechanically operated check valve in the line which would prevent flow in the undesirable direction; and (d) the impact of the adverse valve operation would not degrade safe shutdown capability.
2. The control and/or power for the valve or valve combination was independent of any fire area where credit was taken for a shutdown path which included the valve as a component.
3. Manual operation of the valves was acceptable for safe shutdown.
4. The control power for at least one normally closed valve in series was locked out.
For those valves or valve combinations where the above criteria did not apply, the following procedure was used to identify a means of preventing spurious operation, demonstrating that spurious operation cannot happen or identifying a means of defeating spurious operation:
1. Identify the schematics which show the valve controls and all associated circuits.
2. Study each schematic and identify all short circuits that can cause the unwanted effect. Note whether it is a short between two conductors in the same cable or if it requires two
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.1-2
separate cables to short together. List the cables involved. If the spurious operation cannot occur, state so and proceed to the next item.
3. If separate cables are involved, consult the cable tab to determine the extent of their common routing. List all common routing points.
4. Consider possible prefire actions to prevent spurious operation. These may entail a prescribed combination of control switch settings or the tripping of a breaker when not in use. Any recommended prefire action must not interfere with the automatic operation of an engineered safety feature.
5. If there are no acceptable prefire actions, consider postfire actions to be taken immediately upon determining that a fire in the vulnerable area is severe enough to require the use of alternate shutdown capability. Postfire actions are generally similar to prefire actions but because they are performed only upon detection of a severe fire, they do not affect normal operations. Repair procedures are not permitted for hot shutdown; therefore, any cutting of wires or pulling of fuses other than those normally pulled in the process of racking out breakers cannot be included in the postfire action.
6. Where no prefire nor postfire action is satisfactory, additional modifications will be necessary. These can include fire-retardant cable wraps, isolation switches, etc.
5.1.2 Results
Appendix B lists all valves considered under Case 1 or Case 2, the concern in regard to spurious valve operation, and the justification for no action or the prefire or postfire action taken.
Those valves for which a prefire or postfire action was considered to be necessary are listed in Table 5.1-1.
DR
ESD
EN 2
&3
AM
END
MEN
T 14
JUN
E 20
03
5.1-
3
TAB
LE 5
.1-1
POTE
NTI
AL
SPU
RIO
US
VA
LVE
OPE
RA
TIO
NS
THA
T C
OU
LD A
FFEC
T SA
FE S
HU
TDO
WN
FOR
WH
ICH
A P
REF
IRE
OR
PO
STFI
RE
AC
TIO
N W
AS
NEC
ESSA
RY
Pote
ntia
l Spu
rious
C
ompo
nent
Syst
emM
echa
nica
lD
raw
ings
Con
cern
with
Mal
func
tion
Res
olut
ion
AO
2(3)
-203
-1A
,B,C
,DA
O2(
3)-2
03-
2A,B
,C,D
MS
M-1
2,
M-3
45Sp
urio
us o
peni
ng w
ill re
sult
in lo
ss o
f re
acto
r coo
lant
thro
ugh
the
mai
n st
eam
lin
e.
A sp
urio
us si
gnal
will
cau
se o
nly
one
sole
noid
(e
ither
ac
or d
c) o
f a v
alve
to fa
il to
per
form
its
func
tion.
As a
resu
lt, fo
r a g
iven
fire
, one
MSI
V
on e
ach
stea
mlin
e co
uld
fail
to c
lose
, but
the
redu
ndan
t val
ve o
n ea
ch st
eam
line
wou
ld
isol
ate
the
line.
Targ
et R
ock
Val
ve2(
3)-2
03-3
Aor El
ectro
mat
ic R
elie
f V
alve
s 2(
3)-2
03-3
Bor 2(
3)-2
03-3
Cor 2(
3)-2
03-3
Dor 2(
3)-2
03-3
E
MS
M-1
2,M
-345
(sht
. 1)
Spur
ious
ope
ning
will
ven
t RPV
in
vent
ory
to su
ppre
ssio
n po
ol.
An
inhi
bit s
witc
h ha
s bee
n ad
ded
in p
anel
902
-3
(903
-3) t
o pr
even
t spu
rious
blo
wdo
wn
from
a
fire
outs
ide
Fire
Are
a TB
-V (C
ontro
l Roo
m a
nd
Aux
iliar
y El
ectri
c Eq
uipm
ent R
oom
or A
EER
A
rea)
(see
Sub
-sec
tions
6.2
.1.8
and
6.2
.2.8
).
For a
fire
in F
ire A
rea
TB-V
, spu
rious
bl
owdo
wn
is p
reve
nted
by
rem
ovin
g po
wer
to
the
AD
S lo
gic
by o
peni
ng c
ircui
t bre
aker
s at
the
125-
Vdc
Tur
bine
Bui
ldin
g m
ain
bus 2
A-1
(3
A-1
) dis
tribu
tion
pane
l and
at 1
25-V
dc
Turb
ine
Bui
ldin
g re
serv
e bu
s 2B
-1 (3
B-1
) di
strib
utio
n pa
nel.
To p
reve
nt sp
urio
us
oper
atio
n of
any
sing
le p
ress
ure
relie
f val
ve fo
r a
fire
in F
ire A
reas
RB
2-I,
RB
2-II,
TB
-I, T
B-
III, T
B-V
, RB
3-I o
r RB
3-II,
125
-Vdc
pow
er to
th
ese
valv
es is
rem
oved
by
eith
er tr
ippi
ng
brea
kers
or p
ullin
g fu
ses.
DR
ESD
EN 2
&3
AM
END
MEN
T 14
JUN
E 20
03
5.1-
3a
TAB
LE 5
.1-1
POTE
NTI
AL
SPU
RIO
US
VA
LVE
OPE
RA
TIO
NS
THA
T C
OU
LD A
FFEC
T SA
FE S
HU
TDO
WN
FOR
WH
ICH
A P
REF
IRE
OR
PO
STFI
RE
AC
TIO
N W
AS
NEC
ESSA
RY
Pote
ntia
l Spu
rious
C
ompo
nent
Syst
emM
echa
nica
lD
raw
ings
Con
cern
with
Mal
func
tion
Res
olut
ion
Rea
ctor
Hea
d V
ent
Val
ves
SO2(
3)-0
220-
46
SO2(
3)-0
220-
47
SO2(
3)-3
301
SO2(
3)-3
302
Hea
dV
ent
Con
dens
ate
M-2
6(S
HT.
1)M
-357
(SH
T.1)
M-1
5
Spur
ious
ope
ning
of H
ead
Ven
t Val
ves
coul
d re
sult
in lo
ss o
f inv
ento
ry.
Spur
ious
ope
ratio
n of
Hot
wel
l Mak
e-up
val
ves w
ould
cau
se d
rain
dow
n of
Th
e C
ST’s
.
A P
re-F
ire A
ctio
n to
pul
l fus
es h
asbe
en ta
ken
to p
reve
nt b
oth
valv
es fr
om si
mul
tane
ousl
y op
enin
g
DSS
P’s i
mpl
emen
t a p
ost f
ire a
ctio
n to
ass
ure
the
Hot
wel
l mak
e-up
val
ves a
re c
lose
d.
DR
ESD
EN 2
&3
AM
END
MEN
T 13
JUN
E 20
01
5.1-
4
TAB
LE 5
.1-1
POTE
NTI
AL
SPU
RIO
US
VA
LVE
OPE
RA
TIO
NS
THA
T C
OU
LD A
FFEC
T SA
FE S
HU
TDO
WN
FOR
WH
ICH
A P
REF
IRE
OR
PO
STFI
RE
AC
TIO
N W
AS
NEC
ESSA
RY
Pote
ntia
l Spu
rious
C
ompo
nent
Syst
emM
echa
nica
lD
raw
ings
Con
cern
with
Mal
func
tion
Res
olut
ion
MO
2(3)
-030
2-8
AO
2(3)
-030
2-6A
AO
2(3)
-030
2-6B
MO
2(3)
-030
1-2A
MO
2(3)
-030
1-2B
CR
DM
-34,
M
-357
M
-365
Spur
ious
clo
sure
pre
vent
s RPV
m
akeu
p fr
om c
oolin
g w
ater
line
dur
ing
shut
dow
n us
ing
the
isol
atio
n co
nden
ser.
Shou
ld M
O2(
3)-0
302-
8, b
oth
MO
2(3)
-030
1-2A
an
d M
O2(
3)-0
301-
2B, o
r bot
h A
O2(
3)-0
302-
6A a
nd A
O2(
3)-0
302-
6B c
lose
, mak
eup
wat
er
from
the
CR
D p
ump
via
CR
Dco
olin
g lin
e to
th
e R
PV c
ould
be
disr
upte
d. T
he A
O v
alve
s cl
ose
on lo
ss o
f air
(i.e.
, los
s of n
orm
al p
ower
). M
akeu
p w
ater
is st
ill a
vaila
ble
to th
e R
PV fr
om
the
othe
r uni
t's C
RD
pum
ps v
ia th
e cr
oss-
conn
ect v
alve
s 2/3
-030
1-16
2 an
d -1
63 to
the
char
ging
wat
er li
ne a
nd sc
ram
inje
ctio
n va
lves
C
V2(
3)-0
305-
126
(typi
cal o
f 177
). Th
ese
valv
es o
pen
for s
cram
and
fail
open
on
loss
of
pow
er. I
nstru
ctio
ns a
re in
clud
ed in
shut
dow
n pr
oced
ures
to in
sure
that
MO
-030
2-8,
MO
-03
01-2
A o
r MO
-030
1-2B
, and
eith
er A
O-0
302-
6A o
r AO
-030
2-6B
are
ope
n.M
O2(
3)-1
201-
1M
O2(
3)-1
201-
1AM
O2(
3)-1
201-
2M
O2(
3)-1
201-
3PC
V2(
3)-1
217
RW
CU
M-3
0,M
-361
Failu
re in
ope
n po
sitio
n m
ay c
ause
pr
essu
re to
bui
ld-u
p in
low
pre
ssur
e pi
ping
dow
nstre
am o
f PC
V-2
-121
7 (w
ith R
O) a
nd fl
uid
loss
to c
onde
nser
an
d/or
equ
ipm
ent d
rain
s via
the
relie
f va
lves
.
A p
ostfi
re a
ctio
n to
isol
ate
the
RW
CU
syst
em
by c
losi
ng n
orm
ally
ope
n va
lve
MO
2(3)
-120
1-2
and
verif
ying
clo
sed
man
ually
clo
sed
valv
e M
O2(
3)-1
201-
3 w
ill b
e do
ne to
pre
vent
loss
of
reac
tor c
oola
nt fr
om re
lief v
alve
s in
the
low
pr
essu
re p
ortio
n of
the
RW
CU
syst
em if
the
RW
CU
syst
em d
oes n
ot a
utom
atic
ally
isol
ate.
Fo
r fire
s in
Fire
Are
as R
B2-
II an
d R
B3-
II ai
r w
ill b
e re
mov
ed to
val
ve 2
(3)-
1217
to in
sure
R
WC
U is
olat
ion.
DR
ESD
EN 2
&3
AM
END
MEN
T 20
JUN
E 20
15
5.1-
5
TAB
LE 5
.1-1
POTE
NTI
AL
SPU
RIO
US
VA
LVE
OPE
RA
TIO
NS
THA
T C
OU
LD A
FFEC
T SA
FE S
HU
TDO
WN
FOR
WH
ICH
A P
REF
IRE
OR
PO
STFI
RE
AC
TIO
N W
AS
NEC
ESSA
RY
Pote
ntia
l Spu
rious
C
ompo
nent
Syst
emM
echa
nica
lD
raw
ings
Con
cern
with
Mal
func
tion
Res
olut
ion
MO
2(3)
-130
1-1
and
MO
2(3)
-130
1-4
ICM
-28,
M-3
59Sp
urio
us c
losu
re w
ill is
olat
e R
PV fr
om
isol
atio
n co
nden
ser.
NO
TE: M
O2(
3)-
1301
-1 a
nd M
O2(
3)-1
301-
4 ar
e in
the
dryw
ell a
nd in
acce
ssib
le.
An
alte
rnat
e fe
ed a
nd c
ontro
l arr
ange
men
t has
be
en d
evel
oped
for v
alve
s MO
2(3)
-130
1-1
and
MO
2(3)
-130
1-4
whi
ch a
re in
the
dryw
ell (
see
Subs
ectio
ns 6
.2.1
.4 a
nd 6
.2.2
.4).
MO
2(3)
-130
1-2
and
MO
2(3)
-130
1-3
ICM
-28,
M-3
59Fa
ilure
to o
pen
or sp
urio
us c
lose
pr
even
ts c
onde
nsed
stea
m fr
om
retu
rnin
g fr
om is
olat
ion
coil
to R
PV.
This
def
eats
nat
ural
circ
ulat
ion
path
.
The
Safe
Shu
tdow
n Pr
oced
ures
(DSS
Ps)
impl
emen
t ope
ning
MO
2(3)
-130
1-2
and
MO
2(3)
-130
1-3
shou
ld th
ey fa
il in
clo
sed
posi
tion.
MO
2(3)
-130
1-3
is n
orm
ally
clo
sed.
MO
2(3)
-130
1-10
or MO
2(3)
-410
2
ICM
-28,
M-3
59Sp
urio
us c
losu
re is
olat
es m
akeu
p to
is
olat
ion
cond
ense
r fro
m se
rvic
e w
ater
sy
stem
.
Thes
e no
rmal
ly c
lose
d va
lves
can
be
man
ually
op
ened
.
2(3)
-130
1-17
2(3)
-130
1-20
ICM
-28,
M-3
59Sp
urio
us fa
ilure
to o
pen
posi
tion
wou
ld
allo
w st
eam
to v
ent t
o th
e m
ain
stea
m
lines
.
A p
roce
dure
has
bee
n de
velo
ped
to in
sure
thes
e va
lves
are
clo
sed
or c
lose
man
ually
val
ve 2
(3)-
1301
-16.
MO
2(3)
-230
1-3
HPC
IM
-51,
M-3
34Sp
urio
us o
peni
ng o
f thi
s val
ve w
ould
re
sult
in lo
ss o
f rea
ctor
inve
ntor
y to
the
supp
ress
ion
pool
.
If th
e H
PCI p
ump
is n
ot d
eliv
erin
g w
ater
to th
e re
acto
r, ve
rify
clos
ed M
O2(
3)-2
301-
4or
trip
th
e H
PCI t
urbi
ne.
MO
2(3)
-230
1-14
HPC
IM
-51,
M-3
34Sp
urio
us o
peni
ng o
f thi
s val
ve c
ould
re
sult
in a
dra
in p
ath
for t
he C
ST to
the
toru
s.
Flow
from
the
CST
due
to sp
urio
us o
pera
tion
of
this
valv
e will
not
resu
lt in
hig
h w
ater l
evel
in th
e to
rus.
To
prev
ent d
rain
dow
n of
the
CST
’s th
e D
SSP’
s im
plem
ent a
pos
t fire
act
ion
to a
ssur
e th
is v
alve
rem
ains
clo
sed.
MO
2(3)
-439
9-74
ICM
-39,
M
369
Spur
ious
clo
sure
pot
entia
lly is
olat
es
mak
eup
to in
sola
tion
cond
ense
rTh
ese
norm
ally
clo
sed
valv
es c
an b
e m
anua
lly
open
ed.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.1-6
General Notes for Figure 5.1-1
1. Valves in the primary flow path for the safe shutdown system considered must remain in their normally open position or be capable of being opened.
2. Valves in lines that bypass the safe shutdown system must remain in their normally closed position or be capable of being closed.
3. Where multiple valves are in series, the postulated simultaneous failure of all valves in series is considered necessary for system failure.
All systems which require fluid flow for safe shutdown are considered including HPCI, isolation condenser, diesel fuel oil, diesel cooling water, service water, etc.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.1-7
General Notes for Figure 5.1-2
1. Where a mechanical check valve is in series with a motor operated valve, the check valve is assumed to preserve the isolation function independent of any operation of electrically operated valves downstream.
2. Where multiple valves in series perform the isolation function, the simultaneous opening of all valves must be postulated before system failure is assumed.
All systems that communicate with the reactor vessel were considered including SRVs, MS, HPCI, LPCI, shutdown cooling, RWCU, FW, etc.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.2-1
5.2 Spurious Breaker Operation Analysis
For major loads connected to the safety-related 4-kV switchgear, but not required for safe shutdown, procedures require observation of the breaker status prior to manually loading the diesel onto the bus. Any unwanted load that is closed will be manually tripped and its closing circuit fuse will be removed. After the diesel is loaded onto the bus, this same action will be taken as a precautionary measure for all other unwanted loads that could conceivably overload the diesel if they were to operate coincidentally with the required safe shutdown loads.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.3-1
5.3 Current Transformers/Control Power Transformer Analysis
5.3.1 Control Power Transformers
A concern was raised about the possibility of a secondary fire starting in a motor control center due to a short circuit on the control power transformer's secondary. The secondaries of Dresden motor control center control transformers are unfused and ungrounded. Field experience with shorted MCC control circuits indicates that considerable smoke is produced, but the primary winding shorts and trips the circuit breaker before any flame can erupt. It is unreasonable to assume that such a fire can propagate beyond an individual MCC bucket. Therefore, a safe shutdown can still be achieved.
5.3.2 Current Transformers
The current transformer (CT) circuits are special because they function as "current sources" rather than as "voltage sources." Most of the circuits in the station (including all of the power circuits and control circuits) are voltage sources; i.e., they maintain a reasonably constant voltage, while the current varies with the load. The nominal circuit voltage is never exceeded by more than a few percent regardless of any physical damage to the cables. But a CT does just the opposite. It maintains a reasonably constant current through its secondary circuit, in direct proportion to the primary current. The CT secondary produces as much voltage as necessary to force that constant current through the load.
In normal operation the CT secondary current passes through relay coils and meter movements having very low resistances, on the order of a few ohms. The CT secondary current (5A or less) produces less than 30 volts across such normal burdens.
As the burden resistance increases, so does the voltage that the CT must produce to maintain the desired current. In an open circuit (infinite resistance), the CT secondary voltage will theoretically become infinite. In practice, due to core saturation, the CT secondary voltage will be limited to some value ranging from 2-kV to approximately 25-kV. The exact value depends on the CT ratio and design. Smaller ratio CTs (the majority of CTs in the plant) will tend to produce voltages in the low end of this range. Since control board wiring is customarily hi-pot tested at 2-kV, smaller ratio CTs are no cause for concern. The large ratio CTs can exceed the hi-pot test voltage by an order of magnitude and can potentially cause insulation breakdown in equipment and cables.
Because the open-circuit voltage varies with the CT design, no broad generalization can be made regarding the range of CT ratios for which concern is warranted. Therefore, the possible consequences of a CT circuit insulation breakdown were investigated with respect to the continued functional integrity of nearby safe shutdown cables and equipment.
The investigation concluded that any conceivable insulation breakdown will result in a carbon track having a resistance on the order of 2 ohms. The CT secondary current will pass harmlessly through the carbon track, dropping the voltage to its normal (approximately 10 volts). The integrity of adjacent safety-related circuits is not threatened.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.4-1
5.4 Redundant Fusing of Control Circuits Analysis (IE Information Notice 85-09)
In IE Information Notice 85-09, the NRC is concerned about a possible scenario in which a hot shutdown circuit has an isolation switch, but has only one fuse common to both the local and remote control circuitry. Should a fire-induced fault on the remote circuit blow the fuse before the isolation switch is operated, the local control circuit will not function until the fuse is replaced.
Each safe shutdown equipment item for which local control is utilized was checked to determine whether a fault on the remote circuit (prior to isolation) can blow a fuse needed for local control. Several items were found to be deficient in this regard (see Table 5.4-1).
Dresden Station does not use a remote shutdown panel in performing safe shutdown procedures. The shutdown procedures have identified manual operation of switchgear and local control of equipment. A majority of the required safe shutdown circuits protected by a single fuse are 4-kV circuit breakers. These 4-kV breakers are equipped with local mechanical "TRIP" and "CLOSE" buttons that are good for one close and one trip without the benefit of control power. This stored energy within the switchgear is equivalent to redundant fusing since both require a manual action.
Some of the remaining identified circuits are 480-V breakers on buses 28 and 38. If the control circuit is found to be inoperable, then the circuit breaker may be manually closed.
The remaining circuits are associated with the inboard isolation condenser valves and the engine starting controls for the 2/3 diesel generator. For a fire in the reactor buildings where shutdown paths A1 and B1 are used, fuses (2) for the opposite unit's inboard isolation condenser valve isolation switches in the Unit 2 shutdown cooling pump room on the Unit 3 TIP room may need to be replaced. For a fire in the 2/3 diesel generator room where safe shutdown paths E and F are used, fuses (4) for both units' inboard isolation condenser valve isolation switches may have to be replaced. Procedures will require operators to be sent to these rooms to operate the isolation switches and replace fuses as necessary. Replacement fuses and fuse pullers will be maintained under surveillance in the proximity of these rooms and will be readily accessible if fuse replacement is necessary.
The remaining circuit for which fuse replacement (actually four fuses are replaced) will be the only available solution is the engine starting controls at the 2/3 diesel generator. The possibility of fuse replacement arises for a fire in the reactor buildings where safe shutdown paths A1 and B1 are used. Again, replacement fuses and fuse pullers will be maintained under surveillance in the proximity of these controls. An operator will be in the 2/3 diesel generator room to locally control the diesel generator and inboard isolation condenser valves for all paths which use the 2/3 diesel generator.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.4-2
Table 5.4-1
List of Circuits Per IEIN 85-09 Concerns Which May Require Manual Action Following a Fire
Time of Use(Minutes After Scram)
I 480-V Breakers
A. Bus 28 Main Feed 20
B. Bus 38 Main Feed 20
II Other
A. 2/3 Diesel Generator Local Controls (Engine Starting) 10
B. Isolation Condenser Valve MO2-1301-1 Isolation Switch 30
C. Isolation Condenser Valve MO2-1301-4 Isolation Switch 30
D. Isolation Condenser Valve MO3-1301-1 Isolation Switch 30
E. Isolation Condenser Valve MO3-1301-4 Isolation Switch 30
DRESDEN 2&3 AMENDMENT 13JUNE 2001
5.5-1
5.5 Coordinated Fault Protection Analysis
There has always been a known lack of coordination between the main feeds to the 480-V motor control centers and the branch circuits on those motor control centers. The main feed breakers, located at the 480-V switchgear buses (28, 29, 38 and 39) are equipped with instantaneous trip devices that will operate whenever they experience a fault current of 4800 A or more. These instantaneous trip devices enable the 480-V breakers to interrupt momentary faults greater than the maximum fault current available on the 480-V system. If these devices were changed to short-time delay trips, the interrupting ratings would be degraded to less than the available fault current. Thus, modifying the switchgear will not solve the problem. To prevent potential faults in the branch lines from affecting the 480-V MCCs and the 125-V and 250-Vdc systems, all loads that are not essential for safe shutdown will be tripped after the essential loads are started.
For Dresden all of the safe shutdown loads on a given bus are known to be free of fire induced faults whenever that bus is called upon to power safe shutdown loads. The non-safe shutdown loads that are also connected to the essential buses were not analyzed to determine if a high impedance fault could cause a tripping of the main feed breakers. The safe shutdown procedures address high impedance faults on non-safe shutdown loads by instructing the operator to pull the control power fuses for electrically-operated 4-kV switchgears (23, 24, 33, 34, 23-1, 24-1, 33-1 and 34-1) and 480-V switchgear (28, 29, 38 and 39) breakers that feed non-safe shutdown loads and then to manually trip all such loads. With the fuses pulled, the possibility of spurious closure of the breakers is eliminated. When a breaker at a motor control center is tripped, no further action is required to prevent spurious closure. The same is also true for manually-operated breakers at the 480-V switchgear buses. The tripping of unwanted loads needs to be performed for shutdown paths that use the affected unit's own power train.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.1-1
6.0 MODIFICATIONS 6.1 Introduction As a consequence of 1) the original hot shutdown analysis, the results of which are documented in the "Fire Protection Safe Shutdown Analysis Dresden Station Units 2&3," June 1978 (F.P.P.D.P. Volumes 1 and 2), 2) the 1982 Appendix R Evaluation, the results of which are documented in the Dresden 2&3 "Fire Protection Associated Circuits Analysis and Modifications Report," (F.P.P.D.P. Volumes 1 and 2), and 3) the 1984 Appendix R Reverification, the results of which are presented in this report, several modifications were identified. These modifications were implemented to upgrade the level of fire protection at the station and to satisfy, in conjunction with certain exemptions, the requirements of Appendix R. The modifications are of two general types: 1. Safe shutdown system or alternate shutdown modifications, e.g., rerouting of cables,
installation of local control capability, and installation of new electrical feeds; and 2. Fire protection system modifications, e.g., upgrading of barriers and installation of
detection systems. The safe shutdown system modifications and the circumstances giving rise to them are described in Section 6.2. The fire protection system modifications are described in Section 6.3. Table 6.1-1 contains the completion dates for all modifications identified in Sections 6.2 and 6.3.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.1-2
Table 6.1-1
Completion Schedule For Identified Modifications
Section
Modification
Completion
Date 6.2.1.1 Provide Local Isolation Condenser Water Level Indication Complete 6.2.1.2 Provide Local Breaker Control Complete 6.2.1.3 *Provide Local Control for Condensate Transfer Pump 2A (the 2A
pump is no longer credited for SSD) Complete
6.2.1.4 Provide Alternate Power Feeds to Inboard Isolation Condenser Valves Complete 6.2.1.5 Deleted 6.2.1.6 Provide Access to Valves in Isolation Condenser Pipe Chase Complete 6.2.1.7 Provide Secondary CRD Pump Cooling Water Complete 6.2.1.8 Provide ADS Inhibit Switch for Auto Blowdown Complete 6.2.2.1 Provide Local Isolation Condenser Water Level Indication Complete 6.2.2.2 Provide Local Breaker Control Complete 6.2.2.3 *Provide Local Control for Condensate Transfer Pump 3A (The 3A
pump is no longer credited for SSD) Complete
6.2.2.4 Provide Alternate Power Feeds to Inboard Isolation Condenser Valves Complete 6.2.2.5 Deleted 6.2.2.6 Provide Access to Valves in Isolation Condenser Pipe Chase Complete 6.2.2.7 Provide Secondary CRD Pump Cooling Water Complete 6.2.2.8 Provide ADS Inhibit Switch for Auto Blowdown Complete 6.2.3.1.1 Bifurcate 2/3 Diesel Generator Bus Duct Complete 6.2.3.1.2 Electrically Isolate 2/3 Diesel Generator and Auxiliaries Complete 6.2.3.1.3 Relocate Local Control Station for MCC 38-1 Main Feed Complete 6.2.3.1.4 Install Transfer Switch for 2/3 Diesel Generator Auxiliaries Complete 6.2.3.1.5 Reroute Unit 2 Cables for the 2/3 Diesel Generator and Auxiliaries Complete 6.2.3.1.6 Modification to 2/3 Diesel Generator Breakers Feeding 4kV SWGR Complete 6.2.3.2 CRD Pump Discharge Header Crosstie Piping Complete 6.2.4 Modification to Provide Access to Valves for Cold Shutdown Complete 6.2.5 Modification to provide alternate access to the Unit 2 CRD pumps Complete 6.2.6 Modification to Provide Motor Operators for CRD Pump Discharge
Valves MO2(3)-0301-2A(B) Complete
6.3.1.1 Provide Fire Detection in Unit 2 Reactor Building Complete 6.3.1.2.1 Modifications to Barriers Separating Fire Areas RB2-I and RB2-II Complete * Modification installed in 1997 credited the Diesel Driven Isolation
Condenser makeup pumps to deliver the preferred source of make-up water to the ISCO during a fire. Therefore, the condensate transfer pumps are no longer credited for SSD but still available.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.1-3
Table 6.1-1
Completion Schedule For Identified Modifications
Section
Modification
Completion
Date 6.3.1.2.2 Modifications to Barriers Separating Fire Areas RB2-II and RB 2/3 Complete 6.3.1.3 Provide Protection for Cables in Unit 2 Reactor Building Complete 6.3.2.1 Provide Fire Detection in Unit 3 Reactor Building Complete 6.3.2.2.1 Modifications to Barriers Separating Fire Areas RB3-I and RB3-II Complete 6.3.2.2.2 Modifications to Barriers Separating Fire Areas RB3-II and RB 2/3 Complete 6.3.2.2.3
Modification to Barriers Separating Fire Zone 1.3.1 and Fire Area RB3-II
Complete
6.3.2.3
Provide Protection for Cables in Unit 3 Reactor Building
Complete
6.3.3.1 Upgrade Barrier Between Units 2 and 3 Reactor Building
Complete
6.3.3.2 Protect the 2/3 Diesel Generator Unit 2 Bus Duct in Unit 3 Reactor Building with 1-Hour Barrier
Complete
6.3.3.3
Protect Unit 2 Power and Control Cables for the 2/3 Diesel Generator and Auxiliaries in the Unit 3 Reactor Building with 1-Hour Barrier
Complete
6.3.4.1
Provide Additional Fire Detection and Suppression Systems on the Ground and Mezzanine Floor Levels of Turbine Building
Complete
6.3.4.2
Provide Fire Suppression System on Unit 3 CRD Pump Floor
Complete
6.3.4.3 Seal All Penetrations to Fire Area TB-V
Complete
6.3.4.4 Protect Cable Tray in Ground Floor Access Corridor with 1-Hour Fire Barrier
Complete
6.3.4.5
Protect Cable Risers Adjacent to TB-V
Complete
6.3.5.1 Protect Diesel Generator 2/3 Cooling Water Pump Transfer Switch with 1-Hour Barrier
Complete
6.3.5.2
Provide Automatic Suppression and Detection Systems and Curbing in Lower Level of Crib House
Complete
6.3.5.3
Provide Curbing and Automatic Suppression in Upper Level of Crib House
Complete
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.2-1
6.2 Safe Shutdown System Modifications 6.2.1 Unit 2 Safe Shutdown System Modifications 6.2.1.1 Provide Local Isolation Condenser Water Level Indication A sight glass was installed on the isolation condenser to provide the operator with the capability of local visual monitoring of the shell side water level if the control room indicator LI-2-1340-2 is disabled. The sight glass is located at the isolation condenser on Elevation 589 feet in the Reactor Building and made operable by opening two hand operated valves. Since no cable separation analysis was performed for LI-2-1340-2, credit for the sight glass is taken throughout Dresden 2. This modification is used for alternative shutdown paths B1 and A2. This modification was identified during the 1978 hot shutdown analysis (see F.P.P.D.P. Volumes 1 and 2). 6.2.1.2 Provide Local Breaker Control Local breaker control is installed for the following Division I breakers: 1. 4-kV SWGR 2/3 diesel generator feed breaker to SWGR 23-1, 2. 4-kV SWGR tie breakers between SWGR 23-1 and SWGR 23, 3. 4-kV to 480-kV SWGR feed breakers from SWGR 23-1 to SWGR 28, 4. Feeds from SWGR 23 to control rod drive pump 2A, and 5. Feed from SWGR 23 to service water pump 2A. These modifications were installed to allow the operator to isolate faults in the normal breaker controls and to locally control the breaker at the switchgear. These modifications together with the electrical isolation and control capability provided for the 2/3 diesel generator and its auxiliaries (see Subsection 6.2.3.2) assure that onsite auxiliary electrical power is available to the control rod drive pump, the service water pump, and the condensate transfer pump (The 2A and 3A pumps are no longer credited for SSD). These modifications are applicable to Fire Area TB-Vwhich is composed of Fire Zones 2.0 (Control Room) and 6.2 (AEER). Fire Area TB-V contains control cables for both Units 2 and 3. Credit is taken for this modification in alternative shutdown path A2, for the above mentioned fire zones. This modification was identified as being needed during the 1978 hot shutdown analysis (see F.P.P.D.P. Volumes 1 and 2). Local breaker isolation and control is also installed for the following Division II breakers: 1. 4-kV SWGR Unit 2 diesel generator 2 feed breaker to SWGR 24-1, 2. 4-kV SWGR tie breakers between SWGR 24 and 24-1, 3. 4-kV to 480-V SWGR feed breaker from SWGR 24-1 to SWGR 29, 4. Feeds from SWGR 24 to control rod drive pump 2B, and 5. Feeds from SWGR 24 to service water pumps 2B and 2/3. However, no credit is taken in the current safe shutdown analysis for this capability.
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6.2.1.3 Provide Local Control for Condensate Transfer Pump 2A The local control capability has been provided for condensate transfer pump 2A. To locally control the pump, it is necessary to electrically isolate the normal control circuits to the pump. This isolation is accomplished by pulling one fuse at MCC 28-2 (see Exemption Requests, F.P.R. Volume 4). This modification together with local control of 2/3 diesel generator (see Subsection 6.2.3.1) and local breaker control (see Subsection 6.3.1.2) assure that power and control capability is available to the condensate transfer pumps. This modification is applicable to Fire Area TB-V which is composed of Fire Zones 2.0 (Control Room) and 6.2 (AEER.) This fire area contains control cables for both Units 2 & 3. Credit is no longer taken for this modification in alternate shutdown path A2 in the above mentioned fire zones. This modification was identified during the 1978 hot shutdown analysis. Similar isolation and control capability is installed for condensate transfer pump 2B. However, no credit is taken for either pumps’ capability in the current analysis. Note: The original 10CFR50 Appendix R analysis used the condensate transfer pump 2A to
supply the initial makeup water to the isolation condenser. Initial makeup to the isolation condenser is now provided by the isolation condenser makeup pumps. Therefore, CST transfer pump 2A is no longer credited for SSD.
6.2.1.4 Provide Alternate Power Feeds to Inboard Isolation Condenser Valves Alternate electrical power and control feeds have been installed on each of the two inboard, i.e., inside primary containment, isolation condenser valves MO2-1301-1 and MO2-1301-4. These valves are normally open and are required to remain open for isolation condenser operation. The possible spurious closure of these valves due to fire damage of their control circuits would defeat isolation condenser operation. Since the valves are located inside the inerted drywell, a manual operation to rectify the spurious operation is not feasible. The new alternate feeds were installed to provide means to override the effects of spurious signals on these valves (see Figure 6.2-1). These alternate feeds are routed through the Reactor Building torus area (Fire Zone 1.1.2.1) while the normal feeds to these valves are located on the next elevation up (Fire Zone 1.1.2.2). The alternate feeds are protected by a 1-hour fire wrap in Fire Zone 1.1.2.1 (see Subsection 6.3.1.3 for associated fire protection system modifications). The alternate control panels for the two Unit 2 inboard valves are located in the 2/3 diesel generator room (Fire Zone 9.0.C). This location was chosen because an operator would normally be at the 2/3 diesel generator control panels in the 2/3 diesel generator room in the event of a fire requiring shutdown. The alternate feeds for the Unit 2 valves are powered from Unit 3 480-V MCC 38-1, located in Fire Zone 1.1.1.2. A transfer switch has been installed in Fire Zone 1.3.2 (part of Fire Area RB2-I) where the cables to the inboard valves enter the drywell. This switch allows the valves to be opened if they spuriously close since it will select that power feed, normal or alternate, which is energized. (Assuming the Unit 2 electrical equipment has been damaged by the fire, the feed which would be energized would be the alternate feed from MCC 38-1.)
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This modification is applicable to Fire Areas RB2-II, TB-I, TB-II, and TB-V where control cables to MO2-1301-1 and MO2-1301-4 are routed. Credit is taken for this modification in alternate shutdown paths B1 and A2. An isolation switch is also installed in Fire Zone 1.3.2 to manually select the power feed to the inboard valves. If a fire in Unit 3 were to damage MCC 38-1 or the new controls in the 2/3 diesel generator room, a spurious signal could possibly close the Unit 2 valves via the newly installed alternate feed. To defend against this, an operator will enter Fire Zone 1.3.2 and set the isolation switch to its isolation position which will allow control to be established from the control room only. (A spurious signal from the 2/3 diesel generator room (Fire Area RB2/3) control panel or from MCC 38-1 (Fire Area RB3-II) would cause the transfer switch to take control away from the control room. The isolation position on the isolation switch would override the transfer switch thus returning control to the control room.) This capability is applicable to shutdown path E and Fire Areas RB2/3 and RB3-II where the alternate controls are located. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.1.5 (Deleted) 6.2.1.6 Provide Access to Valves in Isolation Condenser Pipe Chase An access ladder was provided in the isolation condenser pipe chase (Fire Zones 1.1.2.5.B and 1.1.2.5.C) to facilitate the manual operation of isolation condenser valves MO2-1301-2 and MO2-1301-3 which are located in Fire Zones 1.1.2.5.B and 1.1.2.5.C, respectively. The ladder allows access to the valves from the isolation condenser floor (Fire Zone 1.1.2.5.A, Reactor Building elevation 589 feet 0 inches) which is part of Fire Area RB2-I along with the pipe chase. The grating which acts as flooring between Fire Zones 1.1.2.5.A and 1.1.2.5.B and Fire Zones 1.1.2.5.B and 1.1.2.5.C was cut to allow installation of the ladder for access to the valves. Providing these means of access ensures that an operator can, if necessary, reach the valves without entering the area of the fire. This modification was identified in the 1984 reevaluation and is used in shutdown paths B1 and A2. 6.2.1.7 Provide Secondary CRD Pump Cooling Water The isolation condenser is a closed shutdown system, therefore, the only reduction in reactor water level is caused by shrinkage and leakage. A maximum of 25 gpm leakage is specified by technical specification limits. The CRD pumps are used to inject makeup water into the reactor when shutdown is achieved by using isolation condenser paths A, A1, A2, or E. The Unit 2 CRD pumps are located in Fire Zone 8.2.2.A on the 495-foot 0-inch elevation of the Turbine Building. The normal pump cooling water is supplied by the Turbine Building Closed Cooling Water (TBCCW) system. Upon loss of offsite power, several operator actions would be required to initiate the TBCCW system. Additionally, if the TBCCW system is damaged by a fire no CRD cooling water would be available. Therefore, an alternate source for cooling the CRD pumps has been installed from the service water system with a tie in from the fire main as an additional alternate cooling source. The service water system is capable of being powered from the onsite emergency ac system. The hot shutdown analysis demonstrates at
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least one of five pumps is available. Any one of the five service water pumps is capable of handling the necessary cooling loads for shutdown of both units. In order to initiate the service water flow to a CRD pump, the service water system must be initiated and the locked-closed manual valve to the specific CRD pump must be opened. The valves are located in the CRD pump room (Fire Zone 8.2.2.A) and thus are accessible for opening whenever the CRD pumps are available. This modification is applicable to isolation condenser paths A, A1, A2, or E. It is applicable to fire areas RB3-II, RB-2/3, TB-II, TB-III, TB-IV, TB-V, Radwaste Building, and Crib House. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.1.8 Provide Inhibit Switch for Auto Blowdown An ADS "Auto Blowdown Inhibit" switch has been added to MCB panel 902-3. This switch, if turned to "INHIBIT" while the previously existing key-operated ERV’s "MANUAL-OFF-AUTO" switch is in the "OFF" position, will prevent a spurious blowdown from occurring due to a fire anywhere outside of the Control Room and Auxiliary Electrical Equipment Room (Zones 2.0 and 6.2, Fire Area TB-V). For a fire in Fire Area TB-V, it is possible for hot shorts to occur which would defeat these switches. However, credit is taken for the operators to actuate these switches immediately after scramming the reactor. Once outside Fire Area TB-V, the operators are directed by shutdown procedures to manually trip all 125-Vdc feeds to the auto blowdown logic. This action is performed at the 125-Vdc distribution panels in the Turbine Building. This modification was identified in the 1984 reanalysis and is applicable to all fire areas. 6.2.2 Unit 3 Safe Shutdown System Modifications 6.2.2.1 Provide Local Isolation Condenser Water Level Indication A sight glass was installed on the isolation condenser to provide the operator with the capability of local visual monitoring of the shell side water level if the control room indicator LI-3-1340-2 is disabled. The sight glass is located at the isolation condenser on Elevation 589 feet in the Reactor Building and made operable by opening two hand operated valves. Since no cable separation analysis was performed for LI-3-1340-2, credit for the sight glass is taken throughout Dresden 3. This modification is used for alternative shutdown paths A1 and B2. This modification was identified during the 1978 hot shutdown analysis (see F.P.P.D.P. Volumes 1 and 2).
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6.2.2.2 Provide Local Breaker Control Local breaker control is installed for the following Division I breakers: 1. 4-kV SWGR 2/3 diesel generator feed breaker to SWGR 33-1, 2. 4-kV SWGR normal feed breakers to SWGR 33-1 and SWGR 33, 3. 4-kV to 480-V SWGR feed breakers from SWGR 33-1 to SWGR 38, 4. Feeds from SWGR 33 to control rod drive pump 3A, and 5. Feeds from SWGR 33 to service water pump 3A. These modifications were installed to allow the operator to isolate faults in the normal breaker controls and to locally control the breaker at the switchgear. These modifications together with the electrical isolation /control capability provided for the 2/3 diesel generator and its auxiliaries, (see Subsections 6.2.3.1 and 6.3.4.4), assure that onsite auxiliary electrical power is available to the control rod drive pump, the service water pump, and the condensate transfer pumps (the 2A and 3A pumps are no longer credited for SSD). These modifications are applicable to Fire Area TB-V which is composed of Fire Zones 2.0 (Control Room) and 6.2 (AEER). TB-V contains control cables for both Units 2 & 3. Credit is no longer taken for this modification in alternative shutdown path B2 for the above mentioned fire zones. This modification was identified as being needed during the 1978 hot shutdown analysis (see F.P.P.D.P. Volumes 1 and 2). Local breaker isolation and control is also installed for the following Division II breakers: 1. 4-kV SWGR Unit 3 diesel generator feed breaker to 34-1, 2. 4-kV SWGR tie breakers between SWGR 34 and 34-1, 3. 4-kV to 480-V SWGR feed breaker from SWGR 34-1 to SWGR 39, 4. Feed from SWGR 34 to control rod drive pump 2B, and 5. Feed from SWGR 34 to the service water pump 3B. However, no credit is taken in the current analysis for this capability. 6.2.2.3 Provide Local Control for Condensate Transfer Pump 3A The local control capability has been provided for condensate transfer pump 3A. To locally control the pump, it is necessary to electrically isolate the pump. This isolation is accomplished by pulling one fuse at MCC 38-2 (see Exemption Requests, F.P.R. Volume 4). This modification together with local control of diesel generators 2 & 3 (see Subsection 6.2.3.2) and local breaker control (see Subsection 6.2.2.2) assures that power and control capability is available to the condensate transfer pumps. This modification is applicable to Fire Area TB-V which is composed of Fire Zones 2.0 (Control Room) and 6.2 (AEER). This fire area contains control cables for both Units 2 & 3. Credit is no longer taken for this modification in alternate shutdown path B2 in the above mentioned fire zones. This modification was identified during the 1978 hot shutdown analysis (see F.P.P.D.P. Volumes 1 and 2). Similar isolation and control capability is installed for condensate transfer pump 3B. However, no credit is taken for either pumps’ capability in the current analysis.
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Note: The original 10CFR50 Appendix R analysis used the condensate transfer pump 3A to supply the initial makeup water to the isolation condenser. Initial makeup to the isolation condenser is now provided by the isolation condenser makeup pumps. Therefore, CST transfer pump 3A is no longer credited for SSD.
6.2.2.4 Provide Alternate Power Feeds to Inboard Isolation Condenser Valves Alternate electrical power and control feeds have been installed to each of the two inboard, i.e., inside primary containment, isolation condenser valves MO3-1301-1 and MO3-1301-4. These valves are normally open and are required to remain open for isolation condenser operation. The possible spurious closure of these valves due to fire damage to their control circuits would defeat isolation condenser operation. Since the valves are located inside the inerted drywell, manual operation to rectify the spurious operation is not feasible. The new alternate feeds were installed to upgrade the reliability of the isolation condenser system and provide means to override the effects of spurious signals on these valves (see Figure 6.2-1). These alternate feeds are routed through the Reactor Building torus area (Fire Zone 1.1.1.1) while the normal feeds to these valves are located on the next elevation up (Fire Zone 1.1.1.2). The alternate feeds are protected by a 1-hour fire wrap in Fire Zone 1.1.1.1 (see Subsection 6.3.2.3 for associated fire protection system modifications). The alternate control panels for the two Unit 3 inboard valves are located in the 2/3 diesel generator room (Fire Zone 9.0.C). This location was chosen because an operator would normally be at the 2/3 diesel generator control panels in the 2/3 diesel generator room in the event of a fire requiring shutdown. The alternate feeds for the Unit 3 valves are powered from Unit 2 480-V MCC 28-1, located in Fire Zone 1.1.2.2. A transfer switch has been installed in Fire Zone 1.4.1 (part of Fire Area RB3-I) where the cables to the inboard valves enter the drywell. This switch allows the valves to be opened if they spuriously close since it will select that power feed, normal or alternate, which is energized. (Assuming that Unit 3 electrical equipment has been damaged by the fire, the feed which would be energized would be the alternate feed from MCC 28-1.) This modification is applicable to Fire Areas RB3-II, TB-II, TB-III, and TB-V where control cables to MO3-1301-1 and MO3-1301-4 are routed. Credit is taken for this modification in alternate shutdown paths A1 and B2. An isolation switch is also installed in Fire Zone 1.4.1 to manually select the power feed to the inboard valves. If a fire in Unit 2 were to damage MCC 28-1 or the new controls in the 2/3 diesel generator room, a spurious signal could possibly close the Unit 3 valves via the newly installed alternate feed. To defend against this, an operator will enter Fire Zone 1.4.1 and set the isolation switch to its isolation position which will allow control to be established from the control room only. (A spurious signal from the 2/3 diesel generator room (Fire Area 9.0.C) control panel or from MCC 28-1 (Fire Area RB2-II) would cause the transfer switch to take control away from the control room. The isolation position on the isolation switch would override the transfer switch thus returning control to the control room.) This capability is applicable to shutdown path F and Fire Areas RB2/3 and RB2-II where the alternate controls are located. These modifications
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were identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.2.5 (Deleted) 6.2.2.6 Provide Access to Valves in Isolation Condenser Pipe Chase An access ladder was provided in the isolation condenser pipe chase (Fire Zones 1.1.1.5.B and 1.1.1.5.C) to facilitate the manual operation of isolation condenser valves MO3-1301-2 and MO3-1301-3 which are located in Fire Zones 1.1.1.5.B and 1.1.1.5.C, respectively. The ladder allows access to the valves from the isolation condenser floor (Fire Zone 1.1.1.5.A, Reactor Building elevation 589 feet 0 inches) which is part of Fire Area RB3-I along with the pipe chase. The grating which acts as flooring between Fire Zones 1.1.1.5.A and 1.1.1.5.B and Fire Zones 1.1.1.5.B and 1.1.1.5.C was cut to allow installation of the ladder for access to the valves. Providing these means of access ensures that an operator can, if necessary, reach the valves without entering the area of the fire. This modification was identified in the 1984 reevaluation and is used in shutdown paths A1 and B2. 6.2.2.7 Provide Secondary CRD Pump Cooling Water The isolation condenser is a closed shutdown system, therefore, the only reduction in reactor water level is caused by shrinkage and leakage. A maximum of 25 gpm leakage is specified by technical specification limits. The CRD pumps are used to inject makeup water into the reactor when shutdown is achieved by using isolation condenser paths B, B1, B2, or F. The Unit 3 CRD pumps are located in Fire Zone 8.2.2.B on the 495-foot 0-inch elevation of the Turbine Building. The normal pump cooling water is supplied by the Turbine Building Closed Cooling Water (TBCCW) system. Upon loss of offsite power, several operator actions would be required to initiate the TBCCW system. Additionally, if the TBCCW system is damaged by a fire, no CRD cooling water would be available. Therefore, an alternate source for cooling the CRD pumps has been installed from the service water system with a tie in from the fire main as an additional alternate cooling source. The service water system is capable of being powered from the onsite emergency ac system. The hot shutdown analysis demonstrates at least one of the five pumps is available. Any one of the five service water pumps is capable of handling the necessary cooling loads for shutdown of both units. In order to initiate the service water flow to a CRD pump, the service water system must be initiated and the locked-closed manual valve to the specific CRD pump must be opened. The valves are located in the CRD pump room (Fire Zone 8.2.2.B) and thus are accessible for opening whenever the CRD pumps are available. This modification is applicable to all isolation condenser paths B, B1, B2, and F that use the Unit 3 CRD pumps. It applies to Fire Areas RB2-II, RB-2/3, TB-I, TB-II, TB-IV, TB-V, Radwaste Building, and Crib House. This modification was identified in the Associated Circuits Report, June 1982 (see F.P.P.D.P. Volumes 1 and 2). 6.2.2.8 Provide Inhibit Switch for Auto Blowdown An ADS"Auto Blowdown Inhibit" switch has been added to MCB panel 903-3. This switch, if turned to "INHIBIT" while the previously-existing key-operated ERV’s "MANUAL-OFF-
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AUTO" switch is in the "OFF" position, will prevent a spurious blowdown from occurring due to a fire anywhere outside of the Control Room and Auxiliary Electrical Equipment Room (Zones 2.0 and 6.2, Fire Area TB-V). For a fire in Fire Area TB-V, it is possible for hot shorts to occur which would defeat these switches. However, credit is taken for the operators to actuate these switches immediately after scramming the reactor. Once outside Fire Area TB-V, the operators are directed by shutdown procedures to manually trip all 125-Vdc feeds to the auto blowdown logic. This action is performed at the 125-Vdc distribution panels in the Turbine Building. This modification was identified in the 1984 reanalysis and is applicable to all fire areas. 6.2.3 Units 2 and 3 Safe Shutdown System Modifications 6.2.3.1 2/3 Diesel Generator System Modifications Several modifications are proposed for the 2/3 diesel generator and Division 1 electrical distribution system. These modifications have three main purposes: 1. To ensure that faults on 2/3 diesel generator control cabling will not interfere with local
operation and control of the 2/3 diesel generator and its auxiliaries, 2. To ensure that a fire affecting the power feeds from the 2/3 diesel generator to one unit
will not affect the ability of the 2/3 diesel generator to feed the other unit, and 3. To ensure that the 2/3 diesel generator can feed both units when necessary. 6.2.3.1.1 Bifurcate 2/3 Diesel Generator Bus Duct The 2/3 diesel generator bus duct was bifurcated as shown in Figure 6.2-3. A new 4-kV SWGR has been installed in the diesel generator room and each branch is provided with breaker isolation. This modification prevents faults on one unit's 4-kV feed from affecting the feed to the other unit. Currently, a fault on the 4-kV feed to one unit could incapacitate the 2/3 diesel generator's ability to feed either unit. The Unit 2 bus duct branch was wrapped to an equivalent 1-hour level of protection for its entire routing in the Unit 3 Reactor Building (Fire Zone 1.1.1.2). (See Subsection 5.3.3.2.) This modification is necessary for alternate shutdown paths A1 and B1. It is applicable to Fire Areas RB2-II and RB3-II. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.3.1.2 Electrically Isolate 2/3 Diesel Generator and Auxiliaries The power and control cables for the 2/3 diesel generator fuel oil transfer pump and the 2/3 diesel generator room vent fan run to MCC's located in Fire Areas RB2-II and RB3-II (Fire Zones 1.1.1.2 and 1.1.2.2). The control cables for the 2/3 diesel generator cooling water pump are routed through Fire Areas RB2-II and RB3-II and into Fire Areas TB-I, TB-II, and TB-III. The control cables from the main control room to the 2/3 diesel generator are routed through Fire Areas TB-V, TB-III, and RB3-II. The isolation condenser shutdown paths utilized by the above fire areas (A1, A2, B1, B2) all make use of the 2/3 diesel generator. A fire in one of the above
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fire zones could cause a cable fault making the 2/3 diesel generator unavailable. To prevent this, the power and control cables from both units to the 2/3 diesel generator, the 2/3 diesel generator room vent fan, the 2/3 diesel generator fuel oil transfer pump, and the 2/3 diesel generator cooling water pump can be electrically isolated and locally controlled in the 2/3 diesel generator room. These modifications protect the diesel and its auxiliaries from faults on either unit's cabling. Additionally, these cables are wrapped in a 1-hour rated wrap as described in Subsection 5.3.3.3. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.3.1.3 Relocated Local Control Station for MCC 38-1 Main Feed The 480-V MCC's 38-1 and 28-1 are each capable of controlling and powering the 2/3 diesel generator fuel oil transfer pump and the 2/3 diesel generator room vent fan. MCC 38-1 is located in the Unit 3 Reactor Building in Fire Zone 1.1.1.2. MCC 28-1 is located in the Unit 2 Reactor Building in Fire Zone 1.1.2.2. Since MCC 38-1 and MCC 28-1 each had a local control station located in the Central Zone Group of the Turbine Building (TB-II) in Fire Zones 8.2.6.C and 8.2.5.C, respectively, a fire in TB-II could affect both local control stations thus affecting the two MCC's in the Reactor Buildings and potentially resulting in the loss of availability of the 2/3 diesel generator vent fan and fuel oil transfer pump. Fire Area TB-II makes use of the isolation condenser shutdown paths A2 and B2. In order to prevent such an event, the local control station for MCC 38-1 was relocated to the 2/3 diesel generator room (Fire Zone 9.0.C). This ensures that at least one source of power for the 2/3 diesel generator auxiliaries will be available for a fire in the Turbine Building. This modification was identified in the 1984 analysis. 6.2.3.1.4 Install Transfer Switch for 2/3 Diesel Generator Auxiliaries The 2/3 diesel generator cooling water pump is located in the Crib House (Fire Zone 11.3) and has both Unit 2 and Unit 3 power feeds available to it. Currently, these two feeds are interconnected at a junction box near the cooling water pump. A fault on one feed would result in making the pump inoperable. An automatic transfer switch was installed at the pump to eliminate the problem. The switch selects that feed which is energized and locks out the other feed. (See Figure 6.2-4.) This modification along with associated fire protection modifications in the Crib House including a 1-hour barrier around the transfer switch and related conduit (see Subsection 6.3.5) will ensure that either the 2/3 diesel generator cooling water pump or both cooling water pumps for the dedicated diesels will be available for a fire in the Crib House. In addition, the transfer switch protects the 2/3 diesel generator cooling water pump from fire related faults in the pump power cable in the Turbine Building. The feeds from the two units run through this building but are located in separate fire areas or protected (see Subsections 6.3.5.1 and 6.3.5.2) so that a fire could not affect both feeds except in the 2/3 diesel generator room itself. (The dedicated diesels are used for a fire in the 2/3 diesel generator room.) This modification was identified in the 1984 analysis
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A transfer switch also has been installed in the power cable connections to Unit 2 and Unit 3 at both the 2/3 diesel generator vent fan and the 2/3 diesel generator fuel oil transfer pump. Previously, both the Unit 2 and the Unit 3 power feeds were joined at a junction box near the equipment such that a fault in the Unit 2 or Unit 3 power feed would disable the equipment. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.3.1.5 Reroute Unit 2 Cables for the 2/3 Diesel Generator and Auxiliaries The Unit 2 power and control feeds to the 2/3 diesel generator and its auxiliaries (fuel oil transfer pump, cooling water pump, and vent fan) exit the 2/3 diesel generator room (Fire Zone 9.0.C) into Unit 3 Reactor Building Fire Zone 1.1.1.2. The cables were routed through this fire zone to approximately column L.5 before entering the Unit 2 Reactor Building. The cables have been rerouted so that they make a much shorter run through the Unit 3 Reactor Building thus entering the Unit 2 Reactor Building at approximately column N. In addition, these cables are protected by a 1-hour cable wrap (see Subsection 6.3.3.2) where they run on the Unit 3 side. These modifications ensure that a fire in RB3-II which would use shutdown path A1 will not prevent the 2/3 diesel generator from powering Unit 2 equipment which would in turn be used to shut down Unit 3. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.3.1.6 Modification to 2/3 Diesel Generator Breakers Feeding 4-kV SWGR The 2/3 breaker's control logic has been modified to allow the operator to supply power to both Units' Division I, 4-kV SWGR simultaneously by overriding the unit selection interlocks. Local operator action at SWGR's 23-1 or 33-1 is necessary. For shutdown paths A2 and B2 in fire areas TB-II and TB-V credit is taken for using the 2/3 diesel generator to supply auxiliary electric power to CRD pumps 2A and 3A and condensate transfer pumps 2A and 3A(the 2A and 3A pumps are no longer credited for SSD) simultaneously because simultaneous use of CRD pumps 2A and 3A and Condensate Transfer Pumps 2A and 3A is necessary. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.2.3.2 CRD Pump Discharge Header Crosstie Piping Since the isolation condenser is a closed cooling system for the reactor, large amounts of makeup water to the vessel are not needed. One of the control rod drive pumps taking suction from the condensate storage will provide all necessary makeup required due to primary coolant shrinkage or leakage. Crosstie piping was installed to connect the CRD pump discharge headers of the two units. This crosstie line is normally isolated by hand operated valves located in Fire Zone 8.2.6.C in the Central Zone Group. This valve is opened when the unaffected units CRD pumps are used for makeup to the affected unit's reactor vessel. This modification is necessary for alternate shutdown paths A1 and B1. It is applicable to Fire Areas RB2-I, RB3-II, TB-I, and TB-III. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2).
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6.2.3.3 Provide Air Vent Valves for the MSIV Air Lines MSIV supply air vent valves have been installed outside the exclusion area in the access corridor. These valves were installed to provide for positive closure of the MSIVs. The MSIVs are identified for immediate closure in the Appendix R safe shutdown procedures. This modification was identified as part of the 1984 analysis. 6.2.4 Modifications To Provide Access to Valves for Cold Shutdown Access galleries are provided for the following motor-operated valves located above the Unit 2 and 3 shutdown Cooling Heat Exchangers.
MO2-1001-4A MO3-1001-4A MO2-1001-4B MO3-1001-4B MO2-1001-4C MO3-1001-4C
Operation of these valves is required for cold shutdown. In the event a fire disables electrical feeds to these valves, cold shutdown can be achieved through manual valve operation. The galleries permit access to these valves for such operation. This modification was identified in the 1984 analysis. 6.2.5 Deleted
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6.3-1
6.3 Fire Protection System Modifications 6.3.1 Unit 2 Reactor Building Fire Protection System Modifications 6.3.1.1 Provide Fire Detection in Unit 2 Reactor Building Fire detection systems are installed which provide coverage for virtually all areas of the Unit 2 Reactor Building except for the refuel floor level. The installation of this additional detection has a twofold purpose: 1. To provide the operators with information which will assist them in determining what
shutdown paths are available in the event of a fire, and 2. To more closely conform to the criteria of Appendix R as clarified in NRC Generic Letter
83-33. The type of detection system and the area of coverage are given below by Unit 2 Reactor Building elevation. (The inerted drywell which runs through all elevations is not described.) Justification for the lack of complete area suppression and detection is provided in Sections 3.4 and 3.5 of the Exemption Requests (F.P.R. Volume 4). The addition of this detection was identified in the 1984 analysis. ELEVATION
DESCRIPTION OF FIRE DETECTION
476 feet 6 inches
There are three fire zones on this elevation.
Fire Zone 1.1.2.1, the torus area, is provided with linear thermal detection in and under all the cable trays routed in this zone. Since the cabling represents the only significant combustible material in the zone, this method of detection is sufficient to ensure that any fire would be detected.
Fire Zones 11.2.1 and 11.2.2, the southwest and southeast corner rooms, respectively, contain the LPCI and core spray equipment. They are also provided with a linear thermal fire detection system throughout.
517 feet 6 inches
Two fire zones, 1.1.2.2 and 1.3.2, are located on this elevation. Fire Zone 1.1.2.2 is provided with an ionization-type fire detection system. Photo electric detectors are used in Fire Zone 1.3.2 because of environmental conditions.
545 feet 6 inches
Two fire zones are located on this elevation, 1.1.2.5.C and 1.1.2.3.
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6.3-2
ELEVATION
DESCRIPTION OF FIRE DETECTION
Fire Zone 1.1.2.5.C, which is part of the isolation condenser pipe chase extending down from the 589-foot 0-inch elevation, does not contain any detection system. However, it is directly connected to Fire Zone 1.1.2.5.A at the 589-foot 0-inch elevation which is provided with ionization detection.
Fire Zone 1.1.2.3 which occupies the remainder of this elevation is provided with an ionization-type fire detection system everywhere except in the regenerative and nonregenerative heat exchanger areas which are separated from the rest of the zone by substantial shield walls.
570 feet 0 inches
Fire Zones 1.1.2.5.B and 1.1.2.4 are located on this elevation. Fire Zone 1.1.2.5.B, which is part of the isolation condenser pipe chase extending down from the 589-foot 0-inch elevation, does not contain a detection system. However, it is directly connected to Fire Zone 1.1.2.5.A on the 589-foot 0-inch elevation which is provided with ionization detection.
Fire Zone 1.1.2.4 occupies the remainder of this elevation except where the fuel pool extends down from the 613-foot 0-inch elevation. This fire zone is provided with an ionization-type detection system throughout except in the cleanup filter and demineralizer area which is separated from the rest of the zone by substantial shield walls. Fixed thermal linear detection which activates a preaction water spray system is provided around the open equipment hatch and stairwell in the ceiling. See Subsection 6.3.1.2.1.
589 feet 0 inches
Fire Zones 1.1.2.5.A and 1.1.2.5.D are located on this elevation.
Fire Zone 1.1.2.5.A is provided with an ionization-type fire detection system throughout except for the small fuel pool demineralizer area which is separated from the rest of the zone by shield walls.
Fixed thermal linear detection which activates a preaction water spray system is provided around the open equipment hatch and stairwell in the ceiling and floor. See Subsection 6.3.1.2.1. The rest of this elevation, exclusive of the areas occupied by the fuel storage pool and dryer separator storage area, is designated Fire Zone 1.1.2.5.D. This fire zone is currently provided with ionization detection over the standby liquid control area. Further detection was not deemed necessary due to the low combustible loading and lack of safe shutdown equipment and cabling in the zone.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-3
ELEVATION
DESCRIPTION OF FIRE DETECTION
613 feet 0 inches
This elevation is common to both Unit 2 and Unit 3 and is designated as Fire Zone 1.1.1.6/1.1.2.6. No detection is proposed for the zone since the high ceiling (approximately 45 feet) severely limits the effectiveness of any possible detection system. A linear thermal detection system is installed around the open equipment hatch and stairwell in the floor.
6.3.1.2 Upgrade Fire Barriers in Unit 2 Reactor Building Several barriers which separate areas containing equipment or cabling for different alternate shutdown paths have been upgraded to provide them with a complete (or equivalent) 3-hour fire rating. The subsections which follow describe the modifications made to upgrade these barriers. The modifications are grouped on the basis of which fire areas the modified barriers separate. These modifications were identified in the 1984 analysis. 6.3.1.2.1 Modifications to Barriers Separating Fire Areas RB2-I and RB2-II Fire Area RB2-I contains equipment necessary to the four isolation shutdown paths (A, B1, A2, and E) and Fire Area RB2-II contains equipment and cabling necessary to the other shutdown method, the HPCI shutdown path C. Because of this, it is necessary to keep a fire in either of these fire areas from spreading to and causing damage in the other fire area. The Appendix R required method for preventing this fire spread is providing complete 3-hour barriers between the fire areas. Because of this and the importance of the two fire areas, modifications have been made for upgrading all of the barriers separating the fire areas to a 3-hour rating (or equivalent, in the case of the 20-foot x 20-foot equipment hatchway, HVAC penetrations, a ladder opening, one mechanical penetration, and stairway between Fire Zones 1.1.2.5.A and 1.1.2.4). Justification, for all areas where a literal 3-hour barrier is not used, is provided in Sections 3.2 and 3.3 of the Exemption Requests (F.P.R. Volume 4). The following list describes the modifications. The list presents the fire zones which are separated by the barrier being modified.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-4
FIRE ZONES SEPARATED BY BARRIER (RB2-I ZONE/RB2-II ZONE)
DESCRIPTION OF BARRIER MODIFICATION
1.3.2/1.1.2.1, 1.1.2.2, 1.1.2.3
Penetrations in the barriers separating Fire Zone 1.3.2 from all other zones except for the louver to the steam chase and adjacent mechanical penetration, the mechanical penetration which contains three pipes and an HVAC duct in the ceiling and a 3' x 4' 3" opening in the floor, are sealed to a 3-hour fire rating. The mechanical penetration in the ceiling is protected by an automatic suppression system which provides a level of protection equivalent to a 3 hour barrier. Fire Zone 1.3.2 is the electrical Division I drywell cable penetration area. A fire in this zone could render the isolation condenser system inoperable if it resulted in the spurious closure of either valve MO2-1301-1 or MO2-1301-4. The primary and secondary electrical feeds to the valves are all Division I and located in the zone. Sealing the barriers surrounding Fire Zone 1.3.2 ensures that a fire inside, which could damage the four Unit 2 isolation condenser shutdown paths, could not damage the alternate HPCI shutdown path C which has no associated cabling or equipment inside Fire Zone 1.3.2. Conversely, a fire from outside could not enter Fire Zone 1.3.2 and damage both the inboard valve feeds.
1.1.2.5.C/1.1.2.3
All penetrations into the isolation condenser pipe chase are sealed to a 3-hour fire rating. This provides a complete 3-hour barrier between RB2-I and RB2-II at the 545-foot 6-inch elevation. This modification, in conjunction with others, ensures that: 1) isolation condenser valves in the pipe chase will not be damaged by a fire in RB2-II, and 2) an operator will be able to manually operate the isolation condenser valves in the pipe chase. Isolation condenser path B1 has been identified for use in the event of a fire in RB2-II.
1.1.2.5.B/1.1.2.4
All penetrations into the isolation condenser pipe chase are sealed to a 3-hour fire rating. This modification, in conjunction with others, ensures that: 1) isolation condenser valves in the pipe chase will not be damaged by a fire in RB2-II, and 2) an operator will be able to manually operate the isolation condenser valves in the pipe chase.
Isolation condenser path B1 has been identified for use in the event of a fire in RB2-II.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-5
FIRE ZONES SEPARATED BY BARRIER (RB2-I ZONE/RB2-II ZONE)
DESCRIPTION OF BARRIER MODIFICATION
1.1.2.5.A/1.1.2.4
HVAC ducts which penetrate the floor and connect Fire Zones 1.1.2.5.A and 1.1.2.4 are protected by sprinklers which will provide adequate protection in lieu of fire dampers. All penetrations from Fire Zone 1.1.2.4 to the isolation condenser floor above (Fire Zone 1.1.2.5.A) are sealed except for the 20-foot x 20-foot equipment hatch, a ladder opening, a mechanical penetration near the stairway, the stairway and three HVAC ducts.
These openings are protected by an automatic preaction water suppression system actuated by a linear thermal detector or wet pipe sprinklers which provide a level of protection equivalent to a 3-hour barrier. These modifications, along with the sealing of the isolation condenser pipe chase, ensure that: 1) a fire in RB2-II will not affect RB2-I thus ensuring that at least one of the four isolation condenser shutdown paths will be available for a fire in RB2-II, and 2) that a fire in RB2-I will be contained in that fire area and will not affect the HPCI shutdown path C which has components located in RB2-II.
1.1.2.5.A/1.1.2.5.D
A 3-hour fire door is installed between these two zones. The doorway represents the only opening in the wall between the zones. Though Fire Zone 1.1.2.5.D contains no safe shutdown equipment or cabling, the zone is part of RB2-II and a fire could conceivably travel from Fire Zone 1.1.2.4 through unsealed penetrations into Fire Zone 1.1.2.5.D. However, the 3-hour fire door prevents any such fire from propagating to RB2-I.
1.1.2.5.A/1.1.2.6
An automatic preaction suppression system actuated by a linear thermal detector will be installed around the 20-foot x 20-foot equipment hatch and open stairway between the two zones. Other unsealed openings are three HVAC ducts which are afforded protection by an automatic water suppression system and mechanical penetrations. Fire Zone 1.1.2.6, which is part of the refueling floor level, contains no safe shutdown equipment or cabling.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-6
6.3.1.2.2 Modifications to Barriers Separating Fire Areas RB2-II and RB-2/3 Fire Area RB-2/3 contains equipment and cabling required for shutdown path B1, in particular, the 2/3 diesel generator. This shutdown path has been identified for use in the event of a fire in RB2-II. Fire Area RB2-II contains electrical equipment used for the shutdown path E which has been identified for use in the event of a fire in Fire Area RB-2/3. Modifications were proposed to upgrade all of the barriers between these two fire areas to a 3-hour fire rating. The following list describes these modifications. The list presents the fire zones which are separated by the barrier being modified. FIRE ZONES SEPARATED BY BARRIER (RB2-II ZONE/RB-2/3 ZONE)
DESCRIPTION OF BARRIER MODIFICATION
1.1.2.2/9.0.C
A Class "A" fire door is installed at the entrance to the access hall leading to the 2/3 diesel generator room (Fire Zone 9.0.C) from Fire Zone 1.1.2.2.
11.2.1/11.2.3
All penetrations from the southwest corner room (Fire Zone 11.2.1) to the Unit 2 HPCI room (Fire Zone 11.2.3) are sealed to a 3-hour fire rating except for an HVAC duct which does not contain a fire damper (see Exemption Requests F.P.R. Volume 4).
6.3.1.3 Provide Protection for Cables in the Unit 2 Reactor Building The alternate power and control feeds to inboard isolation condenser valves MO2-1301-1 and MO2-1301-4 (see Subsection 6.2.1.4) are protected with a 1-hour fire barrier (i.e., 1-hour rated cable wrap) in Fire Area RB2-II. The alternate feeds are routed from MCC 38-1 to Fire Zone 1.1.2.1 of RB2-II (see Subsection 6.2.1.4). The feeds then run through Fire Zone 1.1.2.1 and up into Fire Zone 1.3.2, which is part of RB2-I. The protection for the cables is needed because both the normal feed and the new alternate feed are located in the same fire area. Even though the normal feeds are routed through RB2-II on elevations above Fire Zone 1.1.2.1, it is possible that a single fire, due to the presence of intervening combustibles, would damage the normal and alternate feeds if neither were protected. Because no automatic suppression is provided in Fire Zone 1.1.2.1, Appendix R requires that the cable be protected by a 3-hour barrier. However, the fire loading in the torus area (Fire Zone 1.1.2.1) is very light (less than 1,000 Btu/ft2) and a 1-hour barrier provides adequate protection, ensuring that the alternate feeds are available to open the inboard isolation condenser valves should they spuriously close. An exemption has been requested for the use of a 1-hour rather than 3-hour barrier. (See Section 3.7 of the exemption requests package.) This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2).
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-7
6.3.2 Unit 3 Reactor Building Fire Protection System Modifications 6.3.2.1 Provide Fire Detection in the Unit 3 Reactor Building Fire detection systems are installed which provide coverage for virtually all areas of the Unit 3 Reactor Building except for the refuel floor. The installation of the additional detection has a twofold purpose: 1. To provide the operators with information which assists them in determining what
shutdown paths are available in the event of a fire, and 2. To more closely conform to the criteria of Appendix R as clarified in NRC Generic Letter
83-33. The type of detection system and the area of coverage are given below by Unit 3 Reactor Building elevation. (The inerted drywell which runs through all elevations is not described.) Justification for lack of complete area suppression and detection is provided in Sections 4.3 and 4.4 of the Exemption Requests (F.P.R. Volume 4). These modifications were identified in the 1984 analysis. ELEVATION
DESCRIPTION OF FIRE DETECTION
476 feet 6 inches
There are three fire zones on this elevation.
Fire Zone 1.1.1.1, the torus area, is provided with linear thermal detection in and under all the cable trays routed in this zone. Since the cabling represents the only significant combustible material in the zone, this method of detection is sufficient to ensure that any fire would be detected.
Fire Zones 11.1.1 and 11.1.2, the southwest and southeast corner rooms, respectively, contain the LPCI and core spray equipment. They are also provided with a linear thermal fire detection system throughout.
517 feet 6 inches
Three fire zones, 1.1.1.2, 1.3.1, and 1.4.1, are located on this elevation. The general floor area (Fire Zone 1.1.1.2) is provided with an ionization fire detection system. Fire Zones 1.3.1 and 1.4.1 utilize photoelectric detectors because of the environmental conditions.
545 feet 6 inches
Two fire zones are located on this elevation, 1.1.1.5.C and 1.1.1.3.
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6.3-8
ELEVATION DESCRIPTION OF FIRE DETECTION
Fire Zone 1.1.1.5.C, which is part of the isolation condenser pipe chase extending down from the 589-foot 0-inch elevation, does not contain a detection system. However, it is directly connected to Fire Zone 1.1.1.5.A at the 589-foot 0-inch elevation which is provided with ionization detection.
Fire Zone 1.1.1.3, which occupies the remainder of this elevation, is provided with an ionization fire detection system everywhere except in the regenerative and nonregenerative heat exchanger areas, the cleanup recirculation pump rooms, and the cleanup decant pump phase separator room, which are separated from the rest of the zone by substantial shield walls.
570 feet 0 inches
Fire Zones 1.1.1.5.B and 1.1.1.4 are located on this elevation. Fire Zone 1.1.1.5.B, which is part of the isolation condenser pipe chase extending down from the 589-foot 0-inch elevation, does not contain a detection system. However, it is directly connected to Fire Zone 1.1.1.5.A on the 589-foot 0-inch elevation which is provided with ionization detection.
Fire Zone 1.1.1.4 occupies the remainder of this elevation except where the fuel pool extends down from the 613-foot 0-inch elevation. It is provided with an ionization detection system throughout except in the cleanup filter and demineralizer area which is separated from the rest of the zone by substantial shield walls. Fixed thermal linear detection which actuates a preaction water spray system is provided around the open equipment hatch in the ceiling. (See Subsection 6.3.2.2.1.)
589 feet 0 inches
Fire Zones 1.1.1.5.A and 1.1.1.5.D are located on this elevation.
Fire Zone 1.1.1.5.A is provided with an ionization fire detection system throughout except for the small fuel pool demineralizer area which is separated from the rest of the zone by shield walls.
Fixed thermal linear detection which activates operation of a water spray system is provided around the open equipment hatch in the ceiling and the floor. (See Subsection 6.3.2.2.1.) The rest of this elevation, exclusive of the areas occupied by the fuel storage pool and dryer separator storage area, is designated Fire Zone 1.1.1.5.D. This fire zone is currently provided with ionization detection over the standby liquid control area. Further detection was not deemed necessary due to the low combustible loading and lack of safe shutdown equipment and cabling in the zone.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-9
ELEVATION 613 feet 0 inches
DESCRITION OF FIRE DETECTION This elevation is common to both Unit 2 and Unit 3 and is designated as Fire Zone 1.1.1.6/1.1.2.6. No detection is proposed for the zone since the high ceiling (approximately 45 feet) severely limits the effectiveness of any possible detection system. A linear thermal detection system is installed around the open equipment hatch in the floor.
6.3.2.2 Upgrade Fire Barriers in the Unit 3 Reactor Building Several barriers which separate areas containing equipment or cabling for different alternate shutdown paths are being modified to provide them with a complete (or equivalent) 3-hour fire rating. The subsections which follow describe the modifications made to upgrade these barriers. The modifications are grouped on the basis of which fire areas the modified barriers separate. These modifications were identified in the 1984 analysis. 6.3.2.2.1 Modifications to Barriers Separating Fire Areas RB3-I and RB3-II Fire Area RB3-I contains equipment necessary to the four isolation shutdown paths (B, A1, B2, and F) and Fire Area RB3-II contains equipment and cabling necessary to the other shutdown method, the HPCI shutdown path D. Because of this, it is necessary to keep a fire in either of these fire areas from spreading to and causing damage in the other fire area. The Appendix R required method for preventing this fire spread is providing complete 3-hour barriers between the fire areas. Because of this and the importance of the two fire areas, modifications have been made, upgrading all of the barriers separating these fire areas to a 3-hour rating (or equivalent, in the case of the 20-foot x 20-foot equipment hatch, HVAC penetrations and ladder opening between Fire Zones 1.1.1.5.A and 1.1.1.4). Justification, for all areas where a literal 3-hour rated barrier is not used, is provided in Section 4.2 of the Exemption Requests (F.P.R. Volume 4). The following list describes the modifications. The list presents fire zones which are separated by the barrier being modified.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-10
FIRE ZONES SEPARATED BY BARRIER (RB3-I ZONE/RB3-II ZONE)
DESCRIPTION OF BARRIER MODIFICATION
1.4.1/1.1.1.1, 1.1.1.2, 1.1.1.3
Penetrations in the barriers separating Fire Zone 1.4.1 from all other zones are sealed to a 3-hour rating except an 8' 6" x 2' 3" opening in the floor covered by a steel plate with openings for pipe, and a mechanical penetration to the pipe chase. Fire Zone 1.4.1 is the electrical Division I drywell cable penetration area. A fire in this zone could render the isolation condenser system inoperable if it resulted in the spurious closure of either valve MO3-1301-1 or MO3-1301-4. The primary and secondary electrical feeds to the valves are all Division I and located in the zone. Sealing the barriers surrounding Fire Zone 1.4.1 ensures that a fire inside, which could damage the four Unit 3 isolation condenser shutdown paths, could not damage the alternate HPCI shutdown path D which has no associated cabling or equipment inside Fire Zone 1.4.1. Conversely, a fire from outside could not enter Fire Zone 1.4.1 and damage both the inboard valve feeds.
1.1.1.5.C/1.1.1.3
All penetrations into the isolation condenser pipe chase are sealed to a 3-hour fire rating. This provides a complete 3-hour barrier between RB3-I and RB3-II at the 545-foot 6-inch elevation. This modification, in conjunction with others, ensures that: 1) isolation condenser valves in the pipe chase will not be damaged by a fire in RB3-II, and 2) an operator will be able to manually operate the isolation condenser valves in the pipe chase. Isolation condenser path A1 has been identified for use in the event of a fire RB3-II.
1.1.1.5.B/1.1.1.4
All penetrations into the isolation condenser pipe chase are sealed to a 3-hour fire rating. This modification, in conjunction with others, ensures that: 1) isolation condenser valves in the pipe chase will not be damaged by a fire in RB3-II, and 2) an operator will be able to manually operate the isolation condenser valves in the pipe chase. Isolation condenser path A1 has been identified for use in the event of a fire in RB3-II.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-11
FIRE ZONES SEPARATED BY BARRIER (RB3-I ZONE/RB3-II ZONE)
DESCRIPTION OF BARRIER MODIFICATION
1.1.1.5.A/1.1.1.4
All penetrations from Fire Zone 1.1.1.4 to the isolation condenser floor above (Fire Zone 1.1.1.5.A) are sealed except for the 20-foot x 20-foot equipment hatch, HVAC penetrations, and ladder opening. These openings are protected by an automatic preaction water suppression system activated by a linear thermal detector or automatic wet pipe sprinklers which provide a level of protection equivalent to a 3-hour barrier. These modifications, along with sealing the isolation condenser pipe chase, ensures that: 1) a fire in RB3-II will not affect RB3-I, thus ensuring that at least one of the four isolation condenser shutdown paths will be available for a fire in RB3-II, and 2) that a fire in RB3-I will be contained in that fire area and will not affect the HPCI shutdown path D which has components located in RB3-II.
1.1.1.5.A/1.1.1.5.D
A 3-hour rated fire door is installed between these two zones. The doorway represents the only opening in the wall between the zones. Though Fire Zone 1.1.1.5.D contains no safe shutdown equipment or cabling, the zone is part of RB3-II and a fire could conceivably travel from Fire Zone 1.1.1.4 through unsealed penetrations into Fire Zone 1.1.1.5.D. However, the 3-hour rated fire door will prevent any such fire from propagating to RB3-I.
1.1.1.6/1.1.1.5.A
An automatic preaction suppression system actuated by a linear thermal detector is installed around the 20-foot x 20-foot equipment hatch between the two zones. Other unsealed openings are HVAC ducts two of which are afforded protection by the suppression system around the hatch and mechanical penetrations. Fire Zone 1.1.1.6, which is part of the refueling floor level, contains no safe shutdown equipment or cabling.
6.3.2.2.2 Modifications to Barriers Separating Fire Areas RB3-II and RB-2/3 Fire Area RB-2/3 contains equipment and cabling required for shutdown path A1, in particular, the 2/3 diesel generator. This shutdown path has been identified for use in the event of a fire in RB3-II. Fire Area RB3-II contains electrical equipment used for the shutdown path F which has been identified for use in the event of a fire in Fire Area RB-2/3. Modifications were proposed to upgrade all of the barriers between these two fire areas to a 3-hour fire rating. The following list describes these modifications. The list presents the fire zones which are separated by the barrier being modified. These modifications were identified in the 1984 analysis.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-12
FIRE ZONES SEPARATED BY BARRIER (RB3-II ZONE/RB-2/3 ZONE)
DESCRIPTION OF BARRIER MODIFICATION
11.1.2/11.2.3
All penetrations from the southeast corner room (Fire Zone 11.1.2) to the Unit 2 HPCI room (Fire Zone 11.2.3) are sealed to a 3-hour fire rating.
11.1.2/11.1.3
All penetrations from the southeast corner room (Fire Zone 11.1.2) to the Unit 3 HPCI room (Fire Zone 11.1.3) are sealed to a 3-hour fire rating and the access doorway between Fire Zones 11.1.2 and 11.1.3 is provided with a 3-hour rated fire door.
6.3.2.2.3 Modification to Barriers Separating Fire Zone 1.3.1 from Fire Area RB3-II The shutdown cooling pump room (Fire Zone 1.3.1) contains equipment necessary for cold shutdown. To assure that this equipment is not damaged by fire in Fire Area RB3-II exclusive of this fire zone the barriers separating the two were upgraded to a 3-hour rating or equivalent. The modifications include sealing mechanical penetrations, provide a 3-hour rated fire door and a 3-hour rated fire damper in the wall on the 517-foot 6-inch elevation. Modifications were made to the floor above Fire Zone 1.3.1 at the 545-foot 6-inch elevation which sealed mechanical penetrations and provided a suppression system over the large mechanical penetration which contains three pipes and an HVAC duct. 6.3.2.3 Provide Protection for Cables in the Unit 3 Reactor Building The alternate power and control feeds to inboard isolation condenser valves MO3-1301-1 and MO3-1301-4 (see Subsection 6.2.2.4) are protected with a 1-hour fire barrier (i.e., 1-hour rated cable wrap) in Fire Area RB3-II. The alternate feeds are routed from MCC 28-1 to Fire Zone 1.1.1.1 of RB3-II (see Subsection 6.2.2.4). The feeds then run through Fire Zone 1.1.1.1 and up into Fire Zone 1.4.1, which is part of RB3-1. The protection for the cables is needed because both the normal feeds and the new alternate feeds are located in the same fire area. Even though the normal feeds are routed through RB3-II on elevations above Fire Zone 1.1.1.1, it is possible that a single fire, due to the presence of intervening combustibles, could damage the normal and alternate feeds if neither were protected. Because no automatic suppression is provided in Fire Zone 1.1.1.1, Appendix R requires that the cable be protected by a 3-hour barrier. However, the fire loading in the torus area (Fire Zone 1.1.1.1) is very light (less than 1,000 Btu/ft2) and a 1-hour barrier provides adequate protection, ensuring that the alternate feeds are available to open the inboard isolation condenser valves should they spuriously close. An exemption has been requested for the use of a 1-hour rather than 3-hour barrier (see Section 4.6 of the Exemption Requests, F.P.R. Volume 4). This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2).
DRESDEN 2&3 AMENDMENT 14 JUNE 2003
6.3-13
6.3.3 Unit 2 and Unit 3 Reactor Buildings Fire Protection System Modifications 6.3.3.1 Upgrade Barrier Between Unit 2 and Unit 3 Reactor Buildings All penetrations in the common wall along column/row 44 separating the Unit 2 and Unit 3 Reactor Buildings are sealed to a 3-hour rating except for an unrated door between the Units 2 & 3 Reactor Building equipment drain tank rooms at elevation 476 feet 6 inches. This door is in the northwest corner of Unit 2 Fire Zone 1.1.2.1 and northeast corner of Unit 3 Fire Zone 1.1.1.1. This will prevent a fire from spreading from one Reactor Building to the other where alternate shutdown equipment and cabling are located. This modification was identified in the 1984 analysis. 6.3.3.2 Protect the 2/3 Diesel Generator Unit 2 Bus Duct in the Unit 3 Reactor Building with 1-
Hour Barrier The 2/3 diesel generator bus duct which feeds Unit 2 exits the 2/3 diesel generator room (Fire Zone 9.0.C) into Fire Zone 1.1.1.2 of the Unit 3 Reactor Building and runs through this zone and Fire Zone 1.1.1.3 before entering the Unit 2 Reactor Building. Since Unit 2 equipment powered by the 2/3 diesel generator would be used to shut down Unit 3 for a fire in Fire Area RB3-II (of which Fire Zone 1.1.1.2 and 1.1.1.3 are a part), the Unit 2 bus duct is protected against fire damage by a 1-hour fire barrier (cable wrap) where it is routed in the Unit 3 Reactor Building. (An exemption has been requested for the use of a 1-hour versus 3-hour barrier. See Section 4.7 of the Exemption Requests, F.P.R. Volume 4.) Thus, the Unit 2 feed from the 2/3 diesel generator will be unaffected by a fire in the Unit 3 Reactor Building. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2). 6.3.3.3 Protect Unit 2 Power and Control Cables for the 2/3 Diesel Generator and Auxiliaries in
the Unit 3 Reactor Building with 1-Hour Barrier The power and control cables for the 2/3 diesel generator, the 2/3 diesel generator cooling water pump, fuel oil transfer pump, and room vent fan from Unit 2 exit the 2/3 diesel generator room (Fire Zone 9.0.C) into Fire Zones 1.1.1.2 and 1.1.1.3 of the Unit 3 Reactor Building and run through only the southeast corner before entering the Unit 2 Reactor Building. Since Unit 2 equipment powered by the 2/3 diesel generator would be used to shut down Unit 3 for a fire in Fire Area RB3-II (of which Fire Zones 1.1.1.2 and 1.1.1.3 are a part. 3 diesel generator and its auxiliaries are protected with a 1-hour fire barrier (cable wrap) where they are routed in the Unit 3 Reactor Building. (An exemption has been requested for the use of a 1-hour versus 3-hour barrier. See Section 4.7 of the Exemption Requests, F.P.R. Volume 4). Thus, the Unit 2 feeds to the 2/3 diesel generator and its auxiliaries will be unaffected by a fire in the Unit 3 Reactor Building. This modification was identified in the Associated Circuits Report, June 1982 (F.P.P.D.P. Volumes 1 and 2).
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-14
6.3.4 Unit 2 and Unit 3 Turbine Building Fire Protection System Modifications 6.3.4.1 Provide Additional Fire Detection and Suppression Systems on the Ground and
Mezzanine Floor Levels of the Turbine Building Additional fire detection and suppression was installed on the ground and mezzanine floor levels of the Turbine Building. The type of detection and/or suppression and the area of coverage is given below for the two floor levels. Justification for the lack of complete area detection and suppression is provided in Section 5.3, 5.4, and 5.5 of the Exemption Requests (F.P.R. Volume 4). These modifications were identified in the 1984 analysis. FLOOR LEVEL
DESCRIPTION OF PROPOSED FIRE DETECTION/ SUPPRESSION
Ground (517 feet 6 inches)
An ionization fire detection system and a wet pipe sprinkler system were installed which protect the region bounded by column/rows 43-46.5/F-H and the corridor along row line G from column line 40 to 48. These systems provide separation between Fire Zone 8.2.5.A, 8.2.5.C, and 8.2.5.E.
The addition of these systems means that the entire ground floor of the Turbine Building is protected by fire detection and/or suppression except for: 1) the Unit 3 low pressure heater pull region, 2) the region bounded by column/ rows 45-48/C-E, and 3) the region bounded by 40-43/C-E. The latter two regions contain primarily condensate water treatment equipment and are not needed for safe shutdown.
Mezzanine (534 feet 0 inches and 538 feet 0 inches)
An ionization fire detection system is installed to protect all portions of Fire Zone 8.2.6.A not now covered by suppression or detection. An ionization fire detection system is also installed to protect all portions of Fire Zone 8.2.6.E not now covered by suppression or detection. The addition of these systems results in all portions of the mezzanine floor level being protected by fire detection and/or suppression except for the low pressure heater pull regions.
6.3.4.2 Provide Fire Suppression System on Unit 3 CRD Pump Floor The Unit 3 CRD pump floor on Elevation 495-feet 0-inches, Fire Zone 8.2.2.B, was provided with a wet pipe sprinkler system. This additional suppression in Fire Area TB-III helps ensure that a fire will not spread from TB-III to TB-II. This modification was identified in the 1978 analysis. 6.3.4.3 Seal All Penetrations for Fire Area TB-V Fire Area TB-V, the main control room and auxiliary electric equipment room, is the main control area for all functions of the plant. Although alternate shutdown paths have been identified to shut down Units 2 and 3, the loss of this fire area would require extensive manual operations.
DRESDEN 2&3 AMENDMENT 23 JUNE 2021
6.3-15
Therefore, measures, have been taken which ensure that this fire zone remains free of damage caused by an exterior fire. All penetrations in the boundary walls of Fire Area TB-V, which consists of Fire Zones 2.0 (control room) and 6.2 (auxiliary electrical equipment room), are sealed to a 3-hour fire rating. All ceiling penetrations from Fire Zone 2.0 (control room) are similarly sealed. This provides a 3-hour barrier between the Eastern Zone Group (TB-I) and TB-V. TB-I contains equipment and cabling for shutdown path A2 which would be used to shut down Unit 2 in the event of a fire in TB-V. Also, TB-V contains equipment and cabling to be used to shut down Unit 2 in the event of a fire in TB-I. This modification was identified in the 1984 analysis. 6.3.4.4 Protect Cable Tray in Ground Floor Access Corridor with 1-Hour Fire Barrier The cable tray which runs from 44.5/H north to 44.5/G and then west to 48/G on the 517-foot 6-inch elevation is enclosed in a 1-hour fire rated cable wrap. The primary reason for protecting this section of cable tray is that the tray contains the bus tie cable from 4-kV switchgear 33-1 to 4-kV switchgear 33 and cables associated with the 2/3 diesel generator auxiliaries. This bus tie is utilized for shutdown path B2 which would be employed for shutdown of Unit 3 for a fire in TB-II. The protection will cover the cabling for its entire run in Fire Zone 8.2.5.C (part of TB-II) and approximately 25 feet into Fire Zone 8.2.5.E (part of TB-III). In conjunction with the suppression and detection systems covering this region, the cable protection ensures that the cable is available for use after a fire in TB-II. This modification was identified in the 1984 analysis. 6.3.4.5 Protect Cable Risers Adjacent to TB-V The cable risers and pull boxes adjacent to TB-V contain Unit 3 control cables originating in either the control room or auxiliary equipment room and running into the Unit 3 cable tunnel. Some of the control cables contained in the risers are necessary to retain control room operability of several pieces of Unit 3 equipment. In order to assure the integrity of these control cables for a fire in the Unit 2 trackway area, a 1-hour fire wrap was installed over the risers and pull boxes. Automatic suppression and detection was also added in the area of the risers. The installation of this modification provides separation of alternative paths per the requirements of Section III.G.2.c of Appendix R to 10CFR50. 6.3.5 Unit 2 and Unit 3 Crib House Fire Protection System Modifications 6.3.5.1 Protect 2/3 Diesel Generator Cooling Water Pump Transfer Switch with 1-Hour Barrier The transfer switch and related conduits for the 2/3 diesel generator cooling water pump (see Subsection 6.2.3.1.4) in the Crib House are protected with a 1-hour barrier. Note that the firewrap was installed per Modification M12-3-84-105 and does not cover the flexible conduit (identified as 2” LX on Drawings 12E-2096C and F-220, Sheet 4) that leads to the pull box above the pump. This modification, in conjunction with the addition of suppression and detection systems (discussed below), ensures that a fire affecting either of the dedicated diesel generator's cooling water pumps will not also disable the 2/3 diesel generator's cooling water pump. This was identified in the 1984 analysis.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-16
6.3.5.2 Provide Automatic Suppression and Detection Systems and Curbing in the Lower Level
of Crib House The lower level of the Crib House (the circulating pump floor) contains all three diesel generator cooling water pumps. In order to accomplish safe shutdown without offsite power, the cooling water pumps for two diesels must be kept free of fire damage. This modification was identified in the Associated Circuits Analysis, June 1982 (F.P.P.D.P. Volumes 1 and 2). In order to ensure that these conditions are met for a fire in the Crib House, the following modifications were instituted. 1. A curb was installed around the 2/3 diesel generator cooling water pump. This will
prevent the spread of any flammable liquids either from the 2/3 pump to the dedicated cooling water pumps or circulating water pumps to the 2/3 pump.
2. An automatic, open-head water suppression system was installed over the 2/3 diesel
generator cooling water pump. As with the curbing, this modification aids in preventing a fire originating at the 2/3 pump from spreading and also prevents a fire outside the 2/3 pump region from affecting the 2/3 pump.
3. A photoelectric fire detection system was installed throughout the lower elevation of the
Crib House. This provides early warning of any fire in the region, allowing station personnel to respond rapidly in order to extinguish any fire before significant damage can occur.
4. A ceiling level wet pipe sprinkler system was installed to protect the entire central area of
the lower level (column/row 3.5-4.5/A-B). This provides additional assurance that a fire in the lower level would be quickly controlled and damage limited to one side of the Crib House.
5. An open-head water spray system actuated by a linear thermal detector provides
protection to all cable trays and conduit along the north, west, and east walls of the Crib House.
DRESDEN 2&3 AMENDMENT 13 JUNE 2001
6.3-17
6.3.5.3 Provide Curbing and Automatic Suppression in the Upper Level of the Crib House The upper level of the Crib House consists of two elevations: the 509-foot 6-inch elevation, where the five service water pumps are located, and the 517-foot 6-inch elevation, where the circulating water pump motors and service water pump cables are located. To achieve safe shutdown, at least two service water pumps and their associated cabling must be available. In order to ensure that this would be the case for a fire in Crib House, the following modifications were implemented to further augment the inherent separation between the five redundant service water pumps: 1. Curbs were installed along the entire length of column line B on the 509-foot 6-inch and
517-foot 6-inch elevations and along the entire length of column line 3.75 on the 509-foot 6-inch and 517-foot 6-inch elevations. The curbs prevent the spread of combustible liquids from the 517-foot 6-inch elevation of the upper level to the 509-foot 6-inch Elevation as well as preventing the spread of flammable liquids from one side to the other on both elevations. In addition, the diesel fire pump day tank is enclosed in a curb with a drain line to the yard drain system to prevent a diesel fuel oil spill from exposing the service water pumps.
2. A wet pipe sprinkler system was provided which covers the entire upper level of the Crib
House. This ensures that, should a fire start, it will be quickly contained so that at least two service water pumps and their associated cabling will remain free of fire damage.
r
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LOCAL CONTROLLER IN DIESEL GENERATOR 2/3 ROCH
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AMENDMENT 12
CONTROLLER IN HAIN CONTROL ROOM
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riru: VALL TYPICAL or UNIT-3 TIP ROCH AND UNIT-2 SHUTDOWN PUMP ROOM
INTERCONNECTING VIRING
DRESDEN ST A TIDN Units 2 8. 3
F"JGURE 6.2-1
ALTERNATE rEED TO INBOARD
ISOLATION CONDENSER VALVES
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AMENDMENT 12
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I 4l(V BUS 23-1
DRESDEN ST A TI•N Units 2 8. 3
rtGURE 6.2-3
DIESEL GENERATOR 2/3 BUS
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CABLE: 1132394 IN DUCT TUNNtL
TB-III CABLE: 132394 CIN CABLE: TUNNtU rLlt [L. 502'-6"
HCC 3B-3 fLR. [L. 538'-0"
CABLE 132394 fLR. EL. 517'-6"
D.G. 2/3 AUX. CONT. PNL.
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fLR. tL. 517'-6"
CABLE:1 22393
COMMON rDR UNIT 2 L 3
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AMENDMENT 12
rLR. tL. 539•-o· F~R~h~2~13-~0
•
AttR
• HEAVY LINES DENOTE 3-HR BARRIERS
DRESDEN STATION Units 2 8. 3
rJGURE 6.2-4
CABLE ROUTING DIAGRAM r•R 2/3
DIESEL GENERATOR COOLING \/ATER PUMP
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.1-1
7.0 Safe Shutdown Procedures
7.1 Introduction
The methods of achieving safe hot and cold shutdown at Dresden 2&3 are discussed in Section 3.0. Credit is taken for manual operation of pumps, valves, and electrical equipment for hot and cold shutdown. Procedures have been implemented to aid the operator in performing these actions as required by 10 CFR 50 Appendix R Section III.L.3 and III.L.5. These procedures are available at the station. The local and manual alternative shutdown actions for which credit is taken in the Safe Shutdown Analysis (Section 4.0 of this report) are listed in Table 7.3-1 by applicable fire zone. Cold shutdown repair procedures are identified in Section 4.0 on a fire area/zone basis. Cold shutdown repair procedures are identified in Sections 4.0 and 7.4. Materials necessary to make these repairs are delineated in Section 7.4. Emergency lighting in theform of 8-hour battery packs has been provided in areas where local operations occur and along access paths as described in Section 7.5. Communications capabilities for achieving alternative safe shutdown are discussed in Section 7.6. Access to safe shutdown equipment is discussed in Section 7.7.
Timeline data has been generated to support the alternative shutdown actions and is given in Section 7.2. Dresden Station personnel have walked down the procedures required for the alternative shutdown paths to ensure adequate manpower is available to accomplish the necessarymanual actions in the time available. The minimum manpower available at the station is described in Section 7.2.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
7.2-1
7.2 Timelines and Manpower Requirements
7.2.1 Timelines
The capability of the shutdown methods employed at Dresden 2 and 3 must meet Appendix R Section III.L.2 performance criteria. A calculation was performed to determine the amount of time available before the performance criteria were violated, specifically, the time available before the water level reaches top of active fuel.
AR #320066 documents the actual time required to perform time critical manual actions. The AR is listed in DFPPDP, Volume 6, Book 1, Section X for reference only.
7.2.1.1 HPCI
Credit is taken for the HPCI/LPCI system only in a limited number of fire areas (see Section 4.0). There are no cable discrepancies or equipment associated with this method of shutdown present in the areas of use. Therefore, normal initiation and control of the HPCI/LPCI systems from the control room is available for these areas.
An analysis performed by General Electric (see FPPDP Volume 6, Section X.12) demonstrates that active fuel will remain covered if the HPCI system is initiated in 30 minutes after reactor scram.
7.2.1.2 Isolation Condenser
The isolation condenser automatically initiates on RPV pressure at or above 1,070 psig for 15 seconds. The isolation condenser is sized to accommodate the full decay heat load 8.8 minutes after a scram. The isolation condenser can operate 20 minutes without shell makeup if the minimum level of 11,300 gallons is met. (See UFSAR Chapter 5 Subsection 4.6.3).
An analysis performed by General Electric (see FPPDP Volume 13) demonstrates that active fuel will remain covered if the CRD pumps are initiated 30 minutes after reactor scram.
7.2.2 Manpower
The required minimum number of operating staff on shift is addressed in the Dresden Technical Specifications. Administrative limits for minimum staffing can be found in OP-DR-101-111-1001.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-1
7.3 Procedures Relevant to Hot Shutdown
There are five redundant and alternate, though not unrelated, shutdown methods available at Dresden 2 and 3 (see Section 3.0). Four of these methods use the specific unit's isolation condenser. The fifth method uses the HPCI system to inject water into the RPV and the LPCI system to cool the suppression pool.
The following is a comparison of shutdown paths used to shut down Units 2 and 3.
Unit 2 Unit 3 MethodA B Isolation CondenserB1 A1 Isolation CondenserA2 B2 Isolation CondenserC D HPCI/LPCIE F Isolation Condenser
All operations associated with shutdown paths A, B, C, D, E, and F can be accomplished by the operators from the main control room and are considered redundant shutdown paths.
No alternative shutdown modifications or manual actions are proposed for these methods except those actions inherent in the assumption used in the analysis (e.g., loss of offsite power or spurious operation) that are generic to all paths. These actions are listed in Table 7.3-1.
Shutdown paths A1, A2, B1 and B2 are alternative shutdown paths. Table 7.3-2 lists, by fire area, the alternate shutdown path available and the manual actions that may be required to implement a shutdown path. Table 7.3-3 specifically lists the alternate shutdown actions necessary for a fire causing control room evacuation.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
7.3-2
TABLE 7.3-1
MANUAL ACTIONS INHERENT TO ASSUMPTIONSOF ANALYSIS OR SPURIOUS OPERATIONS
(These actions are not associated with a particular path or fire location and generally apply to all fire areas.)
I. Manual Actions Inherent to Assumptions of Analysis
1. Establish the service/fire water cooling for the CRD pumps. This action is necessitated by the assumption of loss of offsite power and the subsequent loss of TBCCW. It is applicable to all shutdown paths taking credit for using the CRD pumps for reactor makeup. (Paths A, A1, A2, B, B1, B2, E, F)
2. Verify valves 0302-6A, 0302-6B and 0302-8 are open. Valves 0302-6A & 6B fail close on loss of instrument air or due to a loss of off-site power. Valve 0302-8 could close due to a spurious signal, however CRD flow is still available with or without instrument air. The closure of these valves would cause loss of make-up water to the Reactor via the CRD cooling lines. However, the charging water line branches off of the main CRD line up stream of the FCV. Flow through this line is unaffected. Credit is taken in the analysis for the scram injection valves providing an alternate make-up water flow “Path” to the Reactor. An alternate make-up water “Source” is desirable (i.e. FW, HPCI) but NOT required.
It is applicable to all shutdown paths taking credit for using the CRD pumps for reactor water makeup. (Paths A, A1, A2, B, B1, B2, E and F)
2.A Verify that either valve 0301-2A or B are open, or open cross connect valves 2/3-0301-162 and 163 to ensure that reactor water makeup capability exists. This may require taking local control of 0301-2A or 2B by de-energizing their respective power source and manually operating the valves. (Paths A, A1, A2, B, B1, B2, E and F).
3. Close normally open breakers to 2/3 250-V battery charger from either MCC 29-2(Path C) or MCC 39-2 (Path D) to ensure long term 250-V power to HPCI from the dedicated diesel generator if offsite power is lost and 2/3 diesel generator is inoperable. (Paths C&D)
4. Monitor day tank and 15,000 gallon fuel oil tank level to ensure adequate fuel supplies are on site and to secure replacement fuel in a timely manner. No associated circuits for tank level indicator were included in the analysis. (All paths if offsite power is lost.)
DRESDEN 2&3 AMENDMENT 20JUNE 2015
7.3-3
5. Monitor pump amperage at local control station (if indication is not available in the control room). Ensure CRD pump Amps do not exceed 34 Amps to ensure pump operability/discharge pressure. No associated circuits for pump flow or pressure indicators were included in the analysis. (All paths)
6. Monitor isolation condenser level. No associated circuits for the isolation condenser level indicator were included in the analysis. This is applicable to all paths that take credit for the isolation condenser.
7. Monitor condensate storage tank level. No associated circuits for the condensate storage tank level were included in the analysis. (This is applicable to all shutdown paths.)
8. Open diesel driven fire pump day tank refill line Valve 3-5299-301 except for a fire in area TB-II, TB-III, RB3-II and Crib House. Monitor the day tank level.
II Manual Actions to Address Potential Adverse Spurious Operations
1. Remove power to the ADS control circuit at the 125V distribution panels for a control room and AEER (TB-V) fire. An ADS inhibit switch can be manually operated in the control room to prevent spurious auto blowdown for a fire outside the control room or AEER. See Subsections 6.2.1.8 and 6.2.2.8. This is a valve spurious operation concern.
For a fire in Fire Area TB-V, spurious blowdown is prevented by removing power to the ADS logic by opening circuit breakers at the 125-Vdc turbine building main bus 2A-1(3A-1) distribution panel and at the 125-Vdc turbine building reserve bus 2B-1 (3B-1) distribution panel. To prevent spurious operation of any single pressure relief valve for a fire in Fire Areas RB2-I, RB2-II, TB-I, TB-III, TB-V, RB3-I or RB3-II, 125-Vdc power to these valves is removed by either tripping breakers or pulling fuses.
2. Verify that the RWCU has automatically isolated. If necessary close normally open valve MO-2(3)-1201-2 and verify closed or close normally closed valve MO-2(3)-1201-3 or remove air to the main pressure control valve PCV-2(3)-1217. This is a valve spurious operation concern.
3. Trip HPCI turbine or verify closed MO2(3)-2301-4. This is a valve spurious operation concern associated with spurious opening of MO2(3)-2301-3 and is applicable to all paths which take credit for the isolation condenser.
4. Trip any unwanted loads off of buses and remove closing circuit fuse.
DRESDEN 2&3 AMENDMENT 15JUNE 2005
7.3-4
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREA
Fire AreaShutdown
Path Alternative
Shutdown ActionsGeneral See Table 7.3-1RB2-I C Locally monitor reactor pressure and level on reactor building
instrument racks.
Monitor torus level locally at the sight-glass and torus temperature using a surface pyrometer.
RB2-II B1 Trip breakers at 250-Vdc reactor building MCC 2A to prevent spurious closure of MO2-1301-2 and MO2-1301-3 or allow manual hand wheel operation. Manually open valve MO2-1301-3 in isolation condenser pipe chase (1.1.2.5.C) if automatic action has not occurred.
Manually close isolation condenser steam line vent valve 2-1301-16 (1.1.2.5A) if valves 2-1301-17 and 2-1301-20 do not fail closed.
Verify open MO2-1301-2, manually open (in 1.1.2.5.C) if closed by a spurious signal.
Verify open MO2-1301-1 and MO2-1301-4, remotely open at alternate control switch in 2/3 DG room (9.0C) if closed by a spurious signal. Then de-energize circuit. If control has been lost for MO3-1301-1 andMO3-1301-4, replace fuses in panel 2203-75 and then remotely open these valves, if required.
Verify Unit 2 isolation condenser flow by observing vented steam on shell side (outside reactor building).
Verify breakers to SWGR 23-1 and 33-1 are open and remotely startup 2/3 diesel generator and auxiliaries in 2/3 DG room (9.0C) if automatic initiation has not occurred.
Manually open valve MO2-4399-74 or MO2-1301-10 and MO2-4102 (1.1.2.5A).
Open manual valve in TB-II to crosstie Unit 3 CRD pump to Unit 2 RPV
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-5
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREAFire Area Shutdown
Path Alternative
Shutdown ActionsInherent to alternate shutdown path B1 is assumption that Unit 3 CRD pump 3A and service water pump 3A will provide water to Unit 2. Start Unit 3 CRD pump 3A remotely then open valve MO3-0301-2A, 3A CRD Pump Discharge Isolation Valve. All other actions to supply power to these pumps and control these pumps can be accomplished from the control room except startup of 2.3 DG.Trip breaker at 250-Vdc Reactor Building MCC 2B (1.1.2.4) if necessary to facilitate manual opening of MO2-1301-10 and prevent any subsequent spurious closure.Manually close the following valves to preclude run out of a service water pump:
a. 2-3904-501 or M2-3904-500b. 3-3904-501 or M3-3904-500c. 2-3906-500 or 2-3906-501d. 3-3906-500 or 3-3906-501e. 2/3-3999-241 or 2/3-3999-240
Locally monitor isolation condenser makeup pump discharge flow.
Monitor the isolation condenser makeup oil day tank level. Obtain fuel from offsite sources and manually refill the tanks as necessary.
Note 1: For a fire in Fire Zone 1.1.2.2 (RB2-II) enter the Unit 3 T.I.P. (Fire Zone 1.4.1) room and change isolation switch from normal to isolation position to return control of the Unit 3 isolation condenser inboard valves to the control room.
RB3-I D Locally monitor reactor pressure and level or reactor building instrument racks.
Monitor torus level locally at the sight-glass and torus temperature using a surface pyrometer.
DRESDEN 2&3 AMENDMENT 15JUNE 2005
7.3-6
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREA
Fire AreaShutdown
Path Alternative
Shutdown ActionsRB3-II A1 Trip breakers at 250-Vdc reactor building MCC 3A (1.1.1.4) to prevent
spurious closure of MO3-1301-2, MO3-1301-3 and MO3-4399-74 or allow manual handwheel operation.
Manually open valve MO3-1301-3 in isolation condenser pipe chase (1.1.1.5.C) if automatic operation has not occurred.
Verify open MO3-1301-2, manually open (1.1.1.5.C), if it is closed by a spurious signal.
Verify open MO3-1301-1 and MO3-1301-4, remotely open at alternate control switch in 2/3 DG room (9.0C) if closed by spurious signal. Then de-energize circuit. If control has been lost for MO2-1301-1 and MO2-1301-4, replace fuses in panel 2203-75 and then remotely open these valves, if required.
Manually close isolation condenser steam line vent valves 3-1301-16 (1.1.1.5.A) if valves 3-1301-17 and 3-1301-20 do not fail closed.
Verify Unit 3 isolation condenser flow by observing vented steam on shell side (outside reactor building).
Verify breakers to SWGR 23-1 and 33-1 are open and remotely startup 2/3 DG and auxiliaries in 2/3 DG room (9.0.C) if automatic initiation has not occurred.
Manually open valve MO3-4399-74 or MO3-1301-10 and MO3-4102 (1.1.2.5.A).
Manually open valve in TB-II to crosstie Unit 2 CRD pumps to Unit 3 RPV.
Inherent to alternate shutdown path A1 is the assumption that Unit 2 CRD pump 2A, service water pump 2A, and isocondenser makeuppump will provide water to Unit 3. All actions to supply power to these pumps and to control these pumps can be accomplished from the control room except startup at the 2/3 DG.
Manually operate valve 2-301-2A.
DRESDEN 2&3 AMENDMENT 19JUNE 2013
7.3-7
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREAFire Area Shutdown
Path Alternative
Shutdown ActionsTrip breaker at 250-Vdc reactor building MCC 3B (1.1.1.4) if necessary to facilitate manual opening MO3-1301-10 and prevent any subsequent spurious closure.
Manually operate the following valves to provide cooling for CRD pump 2A from the service water system:
a. Open valves 2-3999-357, 2-3999-349, 2-3999-348, 2-3999-358.
b. Close valves 2-3899-205, 2-3899-204, 2-399-360, 2-3999- 361.
Manually close the following valves to preclude run out of the service water pumps.
a. 2-3904-501 or 2-3904-500
b. 3-3904-501 or 3-3904-500
c. 2-3906-500 or 2-3906-501
d. 3-3906-500 or 3-3906-501
e. 2/3-3999-241 or 2/3-3999-240
Locally monitor the isolation condenser makeup pump discharge flow.
Note 1: For a fire in Fire Zone 1.1.1.2 enter the Unit 2 shutdown cooling room (Fire Zone 1.3.2) and change isolation switch from normal to isolate position to return control of the Unit 2 isolation condenser inboard valves to the control room.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-8
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREA
RB-2/3 E & F Isolation switches for MO2-1301-1 and MO2-1301-4 (Path E), MO3-1301-1 and MO3-1301-4 (Path F) must be changed from normal to isolation position in Fire Zone 1.3.2 (Unit 2) and Fire Zone 1.4.1 (Unit 3), respectively, to open above valves if they spurious close.
Close tie breakers between Unit 2 480-V Division I Switchgear 28 and480-V Division II Switchgear 29 to provide power to inboard isolation valves MO2-1301-1 and MO2-1301-4 if they should spuriously close(Path E).
Close tie breakers between Unit 3 480-V Division I Switchgear 38 and 480-V Division II Switchgear 39 to provide power to inboard isolation valves MO3-1301-1 and MO3-1301-4 if they should spurious close (Path F).
Locally monitor the isolation condenser makeup pump flow.
TB-I B1 See RB2-II
Locally monitor reactor pressure and level on reactor building instrument racks.
Locally start an isolation condenser makeup pump from one of the isolation condenser makeup pump rooms.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-9
TABLE 7.3-2
REQUIRED MANUAL ACTIONS BY FIRE AREA
TB-II A2 & B2 See Table 7.3-3. All shutdown actions are the same as for the control room except 2/3 DG auxiliaries must be fed from Unit 3.
Trip breaker at 250Vdc reactor building MCC 2A (3A) to prevent spurious closure of MO2-4399-74 (M)3-4399-74) or allow manual handwheel operation.
Manually open valves MO2-4299-74 (1.1.2.5A.) and MO3-4399-74 (1.1.1.5.A.).
Locally monitor isolation condenser makeup pump discharge flow.
Monitor the isolation condenser makeup pump diesel oil day tank's level, obtain fuel from offsite sources and manually refill tanks as necessary.
TB-III A1 See RB3-II
Locally Monitor Reactor Pressure and level on reactor building instrument racks.
Trip breakers at 250Vdc reactor building MCC 3A to prevent spurious closure of MO-4399-74 or allow manual handwheel operation.
Manually open valve MO3-4399-74 (1.1.1.5.A)
Locally monitor isolation condenser makeup pump discharge flow.TB-IV A,B,C,D
E or FLocally monitor the isolation condenser makeup pump discharge flow.
TB-V A2 & B2 See Table 7.3-3. All shutdown actions must be performed either manually or remotely outside the control room.
RadwasteBuilding
A,B,C,DE,F
Locally monitor the isolation condenser makeup pump discharge flow.
Crib House11.3
A,B,E,F Locally monitor the isolation condenser makeup pump discharge flow.
DRESDEN 2&3 AMENDMENT 19JUNE 2013
7.3-10
TABLE 7.3-3OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE
ISOLATION CONDENSER METHOD OF SHUTDOWN
I. In Control Room
A. Scram Units 2 and 3
B. Manually Close MSIV's
C. Set the ERV’s "Auto Blowdown MANUAL-OFF-AUTO" switch to "OFF" and the ADS "Auto Blowdown Inhibit" switch to "INHIBIT."
D. Call 5 fire brigade members to fire scene
II Establish Decay Heat Removal and Reactor Water Makeup
A. Unit 2 Isolation Condenser Initiation
1) Open valve MO2-1301-3 and verify open MO2-1301-2 in Fire Zone 1.1.2.5.C
Note: Remove power to 250-Vdc reactor building MCC Bus 2A if necessary to prevent spurious closure of MO2-1301-2 and MO2-1301-3 or to allow manual/handwheel operation.
2) Verify open position of MO2-1301-1 and MO2-1301-4, remotely open at alternate control switch in 2/3 DG room if valves are closed by a spurious signal. Then de-energize circuit.
3) Verify closure of AO2-1301-17 and AO3-1301-20 (manually close 2-1301-16 if necessary)
4) Verify Unit 2 isolation condenser flow by observing vented steam on shell side (outside Rx building)
B. Unit 3 Isolation Condenser Initiation
1) Open valve MO3-1301-3 and verify open MO3-1301-2 in Fire Zone 1.1.2.5.C
Note: Remove power to 250-Vdc reactor building MCC Bus 3A if necessary to prevent spurious closure of MO3-1301-2 and MO3-1301-3 or to allow manual/handwheel operation
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-11
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
2) Verify open position of MO3-1301-1 and MO3-1301-4, remotely open at alternate control switch in 2/3 DG room if valves are closed by a spurious signal. Then de-energize circuit.
3) Verify closure of AO3-1301-17 and AO3-1301-20 (manually close 3-1301-16 if necessary)
4) Verify Unit 3 isolation condenser flow by observing vented steam on shell side (outside Rx building)
C. 2/3 DG Initiation (If Offsite Power is Unavailable)
1) Verify breakers to SWGR 23-1 (from DG 2/3 and SWGR 23) are open
2) Verify breakers to SWGR 33-1 (from DG 2/3 and SWGR 33) are open
3) Start 2/3 DG locally and verify proper operation
D. Supply Power to Unit 2
1) Close breaker from 2/3 DG to SWGR 23-1 (if open)
2) Strip the loads off of the 4-kV SWGR and the 480-V SWGR and pull the closing circuit fuses.
Notes:
1. The unit selection logic has been modified so that the operator can manually close 2/3 DG feed breakers at 4-kV SWGR 23-1 and 33-1 to allow both to be simultaneously fed.
2. Care must be taken when both units are simultaneously fed so that 2/3 DG is not overloaded.
3) Verify closed breaker from SWGR 23-1 to 480-V Bus 28
4) Verify closed breaker from 480-V Bus 28 to MCC 28-3
5) Verify closed breaker from 480-V Bus 28 to MCC 28-2
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-12
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
6) Verify closed breaker from 480-V Bus 28 to MCC 28-1
7) Start 2/3 DG vent fan
8) Verify that 2/3 DG cooling water pump automatically starts
E. Supply Unit 3 Power
1) Close breakers from the 2/3 DG to SWGR 33-1 (if open)
Notes:
1. The unit selection logic has been modified so that the operator can manually close 2/3 DG feed breakers at 4-kV SWGR23-1 and 33-1 to allow both to be simultaneously fed.
2. Care must be taken when both units are simultaneously fed so that the 2/3 DG is not overloaded.
2) Strip the loads off of the 4-kV SWGR and the 480-V SWGR and pull the closing circuit fuses.
3) Verify closed breakers from SWGR 33-1 to 480-V Bus 38
4) Verify closed breaker from 480-V Bus 38 to MCC 38-3
5) Verify closed breaker from 480-V Bus 38 to MCC 38-2
6) Verify closed breaker from 480-V Bus 38 to MCC 38-1
7) Start 2/3 DG vent fan (2/3 DG vent fan can be fed from either Unit 2 or Unit 3)
8) Verify that 2/3 DG cooling water pump automatically starts.
F. Unit 2 RPV Makeup
1) Ensure breakers to SWGR 23 from unit auxiliary transformer are open
2) Close breakers from SWGR 23-1 to SWGR 23 at both ends
DRESDEN 2&3 AMENDMENT 22JUNE 2019
7.3-13
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
3) Open manual valves in CRD pump room to provide alternate cooling for CRD pumps
4) Start service water pump 2A at SWGR 23
5) Verify service water flow on local instruments PI2/3-3941-29, PI2-3941-8A, B, and C, and PI3-3941-8A and B
6) Start CRD pump 2A at SWGR 23
6.A) Open CRD pump discharge valve MO2-0301-2A
7) Verify CRD pump flow on FI-2-302-64
8) Verify that a flow path to reactor is open. (i.e., either the scram injection valves are open or AO2-0302-6A or AO2-0302-6B and MO2-302-8 are open)
G. Unit 3 RPV Makeup
1) Ensure breakers to SWGR 33 from unit auxiliary transformer are open
2) Close breakers from SWGR 33-1 to SWGR 33.
3) Open manual valve in CRD pump room to provide alternate cooling from service water system for CRD pumps
4) Start service water pump 3A at SWGR 33
Note: If another service water pump is running, pump 3A need not be started.
5) Verify service water flow on PI2/3-3941-29, PI2-3941-8A, B, and C, and PI3-3941-8A and B
6) Start CRD pump 3A at SWGR 33
6.A) Open CRD pump discharge valve MO3-0301-2A.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-14
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
7) Verify CRD pump flow on FI-3-302-64
8) Verify that a flow path to the reactor is open (i.e., either scram injection valves are open or AO3-0302-6A or AO3-0302-6B and MO3-0302-8 are open).
III Maintain Decay Heat Removal Capability
A. Unit 2 Short Term Isolation Condenser Shell Makeup
1) Open Valve MO2-4399-74
Note: Remove power to 250-Vdc reactor building MCC Bus 2A if necessary to facilitate manual opening of MO2-4399-74 and prevent any subsequent spurious closure
2) Start isolation condenser makeup pump 2/3-43122A or 2/3-43122B.
3) Verify isolation condenser makeup flow or FI 2/3-4341-152.
4) Verify 480V Bus 29 and 480V MCC 29-2 are energized (Bus 29 is energized from Bus 28).
5) Monitor isolation condenser makeup pump diesel day tank level on LI2/3-5241-22 and L2/3-5241-24.
6) Verify proper operation of fuel oil transfer pump 2-5203.
B. Unit 3 Short Term Isolation Condenser Shell Makeup
1) Open Valve MO3-4399-74.
Note: Remove power to 250-Vdc Reactor Building MCC Bus 3A if necessary to facilitate manual opening of MO3-4399-74 and prevent any subsequent spurious closure.
2) Start isolation condenser makeup pump 2/3-43122A or 2/3-43122B.
3) Verify isolation condenser makeup flow on FI 2/3-4341-152.
4) Verify 480V Bus 29 and 480V MCC 29-2 are energized (Bus 29 is energized from Bus 28).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.3-15
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
5) Monitor isolation condenser makeup pump diesel day tank level on LI2/3-5241-22 and L2/3-5241-24.
6) Verify proper operation of fuel oil transfer pump 2-5203.
C. Unit 2 Cooldown
1) Control Unit 2 cooldown by throttling valve MO2-1301-3
2) Monitor Unit 2 isolation condenser level on local sightglass
3) Monitor RPV pressure and level at instrument racks 2202-5 and 2202-6 (instruments LIS2-263-58A & B, LI2-263-59B, LIS2-263-17B & D, PI2-263-52B and PI2-263-60B)
D. Unit 3 Cooldown
1) Control Unit 3 cooldown by throttling valve MO3-1301-3
2) Monitor Unit 3 isolation condenser level on local sightglass
3) Monitor RPV pressure and level at instrument racks 2203-5 and 2203-6 (instruments LIS3-263-58A & B, LI3-263-59B, PI3-263-52B and PI3-263-60B)
E. Monitor condensate storage tank level on LI2/3-3341-77A & B
F. Verify proper operation of Fuel Oil Transfer pump 2/3-5203
G. Monitor local pump discharge pressure indication instrumentation as necessary to ensure proper system operation.
H. Long Term Isolation Condenser Makeup
1) Ensure at least one service water pump operating.
2) Open valve MO2(3)-4102 and MO2(3)-1301-10
IV Address Potential Adverse Valve Spurious Operations
A. Remove power to Units 2 & 3 ADS circuits at Units 2 & 3 125-Vdc distribution panels.
DRESDEN 2&3 AMENDMENT 20JUNE 2015
7.3-16
OPERATIONS REQUIRED FOR A CONTROL ROOM FIRE USING THE ISOLATION CONDENSER METHOD OF SHUTDOWN
B. Verify that valves AO-2(3)-0302-6A and 6B and MO-2(3)-0302-8 are open or verify another reactor water makeup source is available (e.g., FW, HPCI) before resetting the scram system (closing scram injection valves).
C. Verify that the RWCU has automatically isolated. If necessary, close remote manual valves 1201-135A, 1201-135B and 1201-205 to isolate system
D. Trip HPCI turbine
E. Trip any unwanted loads off of buses and remove closing circuit fuses
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-1
7.4 Procedures Relevant to Cold Shutdown
The procedures and materials needed to achieve cold shutdown are listed in this section. The cold shutdown analysis methodology and zone-by-zone analysis are discussed in Sections 4.0. Cold shutdown systems are described in Section 3.2.
7.4.1 Procedures
Repair procedures are potentially necessary to achieve cold shutdown as identified in Section 3.2.Repairs may be necessary in the following fire areas as identified in the applicable section or table listed below.
Fire Areas Repairs IdentifiedRB2-I and RB2-II Table 4.2-2 (All Fire Zones except 1.1.2.3 and 1.3.2)
Table 4.2-3 (Fire Zones 1.1.2.3 and 1.3.2)RB3-I and RB3-II Table 4.5-2 (All Fire Zones except 1.1.1.3 and 1.3.1)
Table 4.5-3 (Fire Zones 1.1.1.3 and 1.3.1)1.2.1 None1.2.2 NoneRB-2/3 NoneTB-I Table 4.8-2TB-II Table 4.9-2TB-III Table 4.10-2TB-IV NoneTB-V Table 4.12-211.3 NoneRadwaste None
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-2
7.4.1.1 Dresden 2&3 Cold Shutdown Loads Requiring Temporary CableConnections
Dresden 2&3 cold shutdown loads requiring temporary emergency feeds are listed below per unit.
Quantity(Per Unit) Shutdown Cooling System2 of 3 Shutdown Cooling Pump 500 HP (ea)
SWGR (ea)75 A @ 4-kV
2 of 2 RBCCW Pump 300 HP (ea)SWGR (ea)
45 A @ 4-kV
2 of 4 Recirc. Loop Vlv(4A or 5A)
16 HP (ea) 20 A @ 480-VMCC (ea)
1 of 2 SDC Vlv 1A or 1B 5 HP 7 A @ 480-V MCC1 Reactor Building 125-V
Distribution PanelFeed capable of original full capacity
LPCI/CCSW Div.II2 of 2 LPCI Pump 700 HP (ea)
SWGR (ea)105 A @ 4-kV
1 LPCI Emg. Air Cooler 5 HP 7 A @ 480-V MCC5 LPCI Emg. Air Cooler 8A/1A (ea)
(pick up/holding)40A/5A @ 125-Vdc (all)
2 of 2 CCSW Pumps 500 HP (ea) 75A @ 4-kV SWGR (ea)2 of 2 CCSW Emg. Air Cooler fans (ea) (2) - 3 HP (total) 20 A @ 480-V MCC
The cables necessary to establish the temporary feeds for the above loads are identified in Subsection 7.4.2 and are stored on site.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-3
7.4.1.2 Control System Repair Procedures
The following types of control system repair procedures are necessary. Section 4.0 identifies which equipment must be repaired on a fire area basis.
1. Procedures have been developed for repair of damage to shutdown cooling, RBCCW, service water, main steam relief valves, LPCI/CCSW, auxiliary power, and diesel generator systems.
2. Cable repair procedures have been developed for the following situations:
a. Attach temporary cable to penetrations,
b. Attach temporary cable to motors,
c. Attach temporary cable to switchgear breaker or MCC starter, and
3. Repair procedures to provide the ability to locally control key mechanical and electrical components:
a. Repairs such that a unit dedicated diesel generator and its auxiliaries can be started independently of existing control cable or logic. Modifications to assure local isolation and control capability are made only for the 2/3 diesel generator. Repair procedures would be applicable to Unit 2 diesel generator and Unit 3 diesel generator.
b. Actions in procedures are available to ensure that the diesel generator capacity is not exceeded (see Tables 3.2-3 and 3.2-6).
c. Procedures are available to transfer from main to reserve 125-Vdc and 250-Vdc power sources.
7.4.1.3 Specific Repairs and Manual Actions Potentially Required for Cold Shutdown
A. Shutdown Cooling Pumps and RBCCW
1. If control room start capability is lost, connect temporary cables from the required motors to spare breakers at the opposite unit, as detailed in Subsection 7.4.1.4.A.
2. Jumper the breaker controls (or use local control) to force closure. Verify proper direction of rotation.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-4
B. LPCI Pumps and Auxiliaries
1. If control room start capability is lost, connect temporary cables from the required motors and 480-V switchgear to breakers at the opposite unit as detailed in Subsection 7.4.1.4.B.
2. Jumper the breaker controls (or use local control) to force closure. Verify proper direction of motor rotation.
C. CCSW Pumps
If control room start capability is lost, connect temporary cables from the required motors to breakers in the opposite unit SWGR 23-1 and 24-1 or 33-1 and 34-1.
D. Relief Valves
If the valves are disabled, remove all relief valve cables from their penetrations, jumper at least three of the penetrations together, and connect a temporary cable from them to the 125-Vdc source at the nearest switchgear that has control power available. Use the opposite unit, if necessary. Verify energization.
(Note: The cable used for this purpose must first be used for repositioning the recirc loop valves, if necessary.)
E. LPCI Emergency Air Coolers/CCSW Emergency Air Cooler
Connect temporary cables to a spare breaker or starter at the nearest energized MCC (probably in the opposite unit). Close the breaker, or jumper the starter controls to force start.
F. Recirculation Loop Valves and Shutdown Cooling Valves (Inside Drywell)
Connect temporary cables from the drywell penetration to a spare breaker or starter at the nearest energized MCC. Detailed procedures exist to cover this action.
Once the valve has been repositioned as desired, the temporary cable can be used for other purposes (e.g., relief valves).
G. Reactor Building 125-V Distribution Panel
Detailed procedures exist for the installation of a temporary cable to the opposite units 125-Vdc reserve supply and to reconfigure that supply to be fed from the unaffected unit's batteries.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-5
H. All Valves Outside Drywell
Manual handwheel operation is assumed. The power feed to the valve will be disabled and the valve manually positioned. The accessibility of these valves for manual operation was reviewed. The valves for which provisions must be made to assure accessibility are identified in Section 6.2.4.
I. Unit 2 and Unit 3 Diesel Generator Local Starting
Detailed procedures exist for isolating the unit's dedicated diesels from the control room and establishing local control.
J. Transfer From Main to Reserve 125-V and 250-Vdc Feeds
Detailed procedures exist for repositioning slugs and closing breakers to establish reserve dc feeds to distribution panels and switchgear.
K. Process Monitoring Instrumentation
Reactor Level and Pressure
Reactor level and pressure are normally monitored in the control room on various instruments, which are fed from two independent divisions. The operator can also locallymonitor reactor level and pressure in the Reactor Building on instrument racks 2202(3)-5 and 2202(3)-6 at the 546-foot elevation or 2202(3)-7 and 2202(3)-8 at the 517-foot elevation. Reactor pressure is used to determine the saturation temperature in the vessel. When the vessel pressure is reduced, a meter will be attached to a drywell penetration tomeasure the recirculation loop temperature, vessel shell temperature and shell flange temperature if control room indication is unavailable.
7.4.1.4 4-kV Breakers to be Used for Temporary Feeds
A. Shutdown Cooling
4-kV Bus 23-1
2- Unassigned 1200 A frame w/150A CT's, bkrs 2328 and 2322
Use for 1 - Shutdown Cooling Pump @ Unit 3 and 1 - RBCCW Pump @ Unit 3
4-kV Bus 24-1
2 - Unassigned 1200 A frame w/150A CT's, bkrs 2423 and 2424
Use for 1 - Shutdown Cooling Pump @ Unit 3 and 1 - RBCCW Pump @ Unit 3
4-kV Bus 33-1
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-6
3 - Unassigned 1200 A frame w/150A and 75A CT's, - bkrs 3328, 3326, and 3321
Use for 1 - Shutdown Cooling Pump @ Unit 2* and 2 RBCCW Pumps @ Unit 2
*This load may be fed from the 4-kV cable penetration for the bus tie from bus 23 to 23-1 at the nearby wall, if the cable in the turbine building is intact and offsite power is available.
4-kV Bus 34-1
No unassigned breakers.
B. LPCI/CCSW Division II
4-kV Bus 24-1
2- Unassigned 1200 A frame w/150A CT's, bkrs 2423 and 2423
Use for 2 - LPCI Pump 3C and 3D (Div. II) @ Unit 3
4-kV Breaker 34-1
No unassigned breakers.
4-kV Bus 33-1
3- Unassigned 1200 A frame w/150A and 75A CT's, breakers 3328, 3326, and 3321
Use for LPCI Pump 2C.
7.4.2 Materials Needed
A. The following cables should be precut to the indicated lengths and maintained in a convenient location, ready for emergency use:
1. 500 feet of 3/c #2 AWG, 5-kV, Cable No. 78400, for any one of the following applications:
a. One shutdown cooling pump at Unit 2.
b. One shutdown cooling pump at Unit 3.
c. One LPCI pump at Unit 3.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-7
2. 500 feet of 3/c #2 AWG, 5-kV, Cable No. 78401, for any one of the following applications:
a. A second shutdown cooling pump at Unit 2.
b. A second shutdown cooling pump at Unit 3.
c. A second LPCI pump at Unit 3.
3. 300 feet of 3/c #2 AWG, 5-kV, Cable No. 78402, for any one of the following applications:
a. One RBCCW pump at Unit 2.
b. One RBCCW pump at Unit 3.
c. One LPCI pump at Unit 2.
4. 300 feet of 3/c #2 AWG, 5-kV, Cable No. 78403, for any one of the following applications:
a. second RBCCW pump at Unit 2.
b. A second RBCCW pump at Unit 3.
c. A second LPCI pump at Unit 2.
5. 350 feet of 3/c #10 AWG, 600-V, Cable No. 78413, for any one of the following applications:
a. Unit 2 LPCI room cooler.
b. Unit 3 LPCI room cooler.
c. Unit 2 shutdown cooling valve.
d. Unit 3 shutdown cooling valve.
6. 500 feet of 4/c #8 AWG, 600-V, Cable No. 78409, for use on the electromatic relief valves and the recirculating loop valves of either unit. The intent is to connect this cable to one loop valve, force it to the desired position, then remove the cable and proceed to the next valve until all are properly positioned. Finally, if necessary, the same cable can be used to
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.4-8
"hot wire" the electromatic relief valves.
7. 800 feet of 3/c #2 AWG, 5-kV, Cable No. 78404, for either of the following applications:
a. One CCSW pump at Unit 2.
b. One CCSW pump at Unit 3.
8. 800 feet of 3/c #2 AWG, 5-kV, Cable No. 78405, for either of the following applications:
a. A second CCSW pump at Unit 2.
b. A second CCSW pump at Unit 3.
9. 700 feet of 4/c #8 AWG, 600-V, Cable No. 78410, for either of the following applications:
a. CCSW room coolers 3C and 3D.
b. CCSW room coolers 2C and 2D.
10. Two 250-foot pieces of 1/c 250 MCM, 600-V, Cable No. 78408, for either of the following applications.
a. Reactor Building 125-Vdc Distribution Panel 2.
b. Reactor Building 125-Vdc Distribution Panel 3.
B. All precut cables have appropriate lugs on both ends to speed the installation of the temporary feeds in time of emergency. When the cables are put to use, any excess lengths should be left lying on the floor, not cut off. An adequate supply of splice kits is also kept on hand so that the lugs may be removed and splice connections made where necessary (e.g., containment penetrations).
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.5-1
7.5 Emergency Lighting
A fire at the Dresden facility could cause the loss of various lighting cabinets concurrent with the loss of offsite power. This resulting blackout of sections of the plant would make access to, and control of, safe shutdown equipment impossible. According to Section III.J of Appendix R, 8-hour battery powered emergency lighting packs shall be provided on all access and egress routes and in all areas where safe shutdown equipment needs to be operated.
In order to conform with the Appendix R requirements, a walkdown was performed at the station. This walkdown was performed on all the primary and alternate access routes that the station identified for each manual action in accordance to the guidelines of Dresden Station Special Procedure SP-84-7-62. The resulting 8-hour battery powered emergency lighting unit locations are shown on Drawings F-201-6 through F-214-6.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.6-1
7.6 Communication Capabilities
The existing communication systems at Dresden Station consist of:
1. Public Address (PA)2. Dial Telephones (PBX) 3. Sound Power Phones4. Radio
7.6.1 Effects of Fire on Each Communication System
7.6.1.1 PA System
Dresden's PA system has a single 120-Vac power feed from lighting cabinet No. 21, located at Column G-43 on the ground floor of the turbine building (Fire Area TB-II, Central Zone Group). Lighting cabinet No. 21 is fed from MCC 29-2, located near Column D-32 (Fire Area TB-I, Eastern Zone Group). This MCC is fed from 480-V Bus 29, near Column N-41 at Unit 2 reactor building elevation 570 feet (Fire Area RB2-II). A fire in any of these areas (comprising most of Unit 2) could totally disable the PA system by damaging its only source of power.
The PA system equipment is interconnected by a seven-conductor cable that carries this same 120-Vac feed to all of the local amplifiers. Therefore, a fire anywhere in the plant has the potential to short out the PA power source, tripping the breaker at lighting cabinet No. 21. Recovery from this condition will require a repair to the damaged cable; this renders the existing PA system totally unavailable for an Appendix R hot shutdown.
7.6.1.2 PBX
Dresden's PBX originates in the administration building. A single trunk connects the central system to the main plant via an underground duct run. This trunk terminates in the Unit 2 turbine building. From there, two branches go out to the Unit 2 reactor building and Unit 3 turbine building. An additional branch runs from the Unit 3 turbine building to the Unit 3 reactor building.
Damage to any cable in the PBX system disables only the equipment downstream of the damage. Therefore, the most vulnerable area is in the vicinity of telephone terminal box
DRESDEN 2&3 AMENDMENT 20JUNE 2015
7.6-2
(TTB) 2-1, on the mezzanine floor of the Unit 2 turbine building (Fire Area TB-I, Eastern Zone Group). A fire at this location could disable all of the telephone equipment in the plant. In contrast, a fire affecting TTB 2-2 on Unit 2 reactor building elevation 545 feet 6 inches, or TTB 3-2 on the same elevation of Unit 3, can disable the PBX in the affected reactor building only. Minimal damage occurs when the fire is confined to a location distant from the TTB's, which are located along both sides of H-wall; in such a case, only the phones in the immediate vicinity of the fire can be affected. For most plausible fires, the telephones are much more likely to work than the PA system.
7.6.1.3 Sound Power Phones
The sound power phone system has the advantage of not requiring an external power source. It essentially consists of a number of jacks, located in (or near) control panels and instrument racks, all wired in parallel. Each jack offers multiple circuits. A matching box in the control room interfaces Units 2 and 3 with Unit 1.
Although it is possible that all of the sound power circuits could be shorted out by a single fire, it is probable that at least one circuit will remain operable. This is a good alternative to the PBX system for areas equipped with sound power jacks.
7.6.1.4 Radio
The radio system in use at Dresden is a multi-channel trunked system operating in the 900 MHz band. The base station transceiver equipment is clustered on Turbine Building elevation 549 feet, Rows C-D, 44-45(Fire Area TB-IV, Zone 8.2.8.D, North Turbine Vent Floor). There areover 400 handheld radios in use at Dresden. Each handheld is capable of operating on any unused channel in the system. Each handheld also has multiple channels of “talk around” which means that a handheld can talk directly to another handheld that is on the same channel. There are remote consoles located in the Control Room, the Central Alarm Station (CAS), and the Secondary Alarm Station (SAS). The remote consoles communicate to the base station equipment located in the Turbine Building. There are several antennas fed by coaxial cable from the base station equipment located on the 549 level of the Turbine Building to the variouslocations throughout the plant, plus bi-directional antennas at the cribhouse and SBO building. Refer to drawing 12E-6802L for the antenna locations.
DRESDEN 2&3 AMENDMENT 22JUNE 2019
7.6-3
A fire in the area of the base station equipment on the 549' level of the plant or in the AEERcould disrupt the operation of the entire system. A fire in the area of any of the remote consoles could disrupt communication only from that console in the area of the fire, while communications from the locations of the other remote consoles would not be affected. Communication from a handheld would not be affected by a fire in the vicinity of any of the remote consoles.
Most fires remote from the base station will have little or no impact. Some of the antennas are sufficiently isolated from the others so that short circuits on one antenna's coaxial cable will not significantly degrade the performance of the remaining antennas.
7.6.2 Communication System Availability in the Event of a Fire
The availability of each communication system for a fire in a given fire area is summarized in Table 7.6-1. For most conceivable fires, some portions of the existing communication systems can be expected to remain operational. Procedures allow for the attempted use of normal communication methods, with reliance upon alternate systems only when necessary. However, since there is a remote possibility that a major fire in the turbine building will disable all of the existing communication systems, a field test of hand-held radios communicating on simplex frequencies independent of the base station equipment was performed to determine if that communication mode was an acceptable alternative.
It was found by this test that, generally, hand-held radios on "talk-around" are a reliable means of direct communication between locations within the same building or from one building to another on nearby elevations. Direct communication is not achievable between widely separated points due to the many reinforced concrete walls and floors separating them. However, the test revealed that by the use of intermediate relay points, communication difficulties can be resolved for all Appendix R safe shutdown procedures. A similar test was performed in March 2017, and the results are documented in AR 3975416-06. Additionally, a white paper describing the available communications during a worst case scenario is captured in AR 3975416-07. Therefore, modifications to the Dresden plant communication systems are not required.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.6-4
TABLE 7.6-1
COMMUNICATION SYSTEM AVAILABILITY MATRIX
Area in WhichFire is Postulated
PrescribedAppendix R
Shutdown PathAnticipated Availability for
Manual Actions
PA PBXSoundPower
Radio(Base)
RB2-I C N/A N/A N/A N/ARB2-II B1 3 1* 2 1RB3-I D N/A N/A N/A N/ARB3-II A1 3 1* 2 1RB2/3 E & F N/A N/A N/A N/ATB-I B1 3 3 2 3TB-II A2 & B2 3 2 2 3TB-III A1 3 1 2 1TB-IV A & B N/A N/A N/A N/ATB-V A2 & B2 3 1 2 3**
Crib House A & B N/A N/A N/A N/ARadwaste A & B N/A N/A N/A N/A
Misc. Outside A & B N/A N/A N/A N/A
Note: 1 - Probably available. Little or no damage is expected.2 - Partially available. Some circuits may still work.3 - Probably disabled. Crucial circuits are in fire area.* - Except at 2/3 Diesel Generator.** - Except repeaters.N/A - Not applicable. Shutdown path does not require any local control
or manual action.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.7-1
7.7 Access to Safe Shutdown Equipment
In order to perform the safe shutdown procedure actions described in Sections 7.3 and 7.4, it is necessary to enter areas which are isolated from the rest of the plant by electrically-controlled or otherwise locked doors. These doors fall into four categories: secondary containment air locks, security doors, high radiation area doors, and miscellaneous locked doors. An evaluation was performed to determine the impact of these doors on access to safe shutdown equipment in the event of a fire. The results of the evaluation are presented in Subsections 7.7.1, 7.7.2, 7.7.3, and 7.7.4.
7.7.1 Secondary Containment Airlock Doors
Secondary containment door interlocks are powered by the 125-Vdc system, which is not postulated to be lost in most safe shutdown scenarios. Furthermore, an emergency bypass button is locked at each door, which could be used upon approval of the Shift Engineer to defeat the interlock. If a fire were to disable the 125-Vdc source to these interlocks, they would fail in such a manner that access would not be prevented.
7.7.2 Security Doors
The card key system for the security doors would normally be available under a loss of offsite power incident, since the security diesel is designed to start and pick up these loads upon loss of bus 34-1. However, if the security diesel fails to start or if a fire damages the security multiplexer cables, the card key system could be impaired such that normal entrance through the security doors would be prevented. However, egress from the security areas would not be prevented. Therefore, in most cases, loss of the card key system would not hinder the operators from reaching safe shutdown locations. Current security force procedures call for the prompt posting of guards at certain locations to assist operations personnel by opening the doors, as necessary. Additionally, the Shift Engineer has keys assigned to him for use in the event that emergency access is needed prior to arrival of the security force personnel. A note is provided in the safe shutdown procedure package to caution the Shift Engineer that use of these keys may be necessary and to issue them as appropriate.
7.7.3 High Radiation Area Doors
High radiation area doors are kept locked in accordance with 10 CFR 20. The Radiation/Chemistry Department controls the normal issuance of high radiation area keys. However, a sufficient number of keys will remain assigned to the Shift Engineer exclusively for use during the performance of the safe shutdown procedures. For personnel safety reasons, a Caution will be provided in the safe shutdown procedure package such that a Radiation/Chemistry Technician or Radiation Protection Foreman should be contacted prior to entry into any high radiation areas. If necessary, he will accompany the Operator and assist him.
DRESDEN 2&3 AMENDMENT 13JUNE 2001
7.7-2
7.7.4 Miscellaneous Locked Doors
There are certain areas of concern which are kept locked (e.g., diesel generator rooms, battery rooms, and the auxiliary electric equipment room). Operations personnel are all assigned a key for the purpose of access to these areas. Additionally, the Shift Engineer is assigned keys which he can issue for this purpose.
: solo t ion condenser a utoMo. tic initio. tion
Makeup to
X
isoto tion condenser shell initio tion
------X
Makeup to RPV initio tion
t=30sec.(MOXiMUM)
t=O Scro.n
t=20Min
Note 1: Assunes 15° F /hr cooldowns
AR #32.0066 documents the actual time
required to perform the actions listed in
this figure . The __ \ R is li~tcd in tly ,
DFPPDP, Volume 6, Book L Section X
for reference only.
Amendment 16
(Scale Change) 4 hours(Note 1)
DRESDEN STATION UNITS 2 8x 3
FIGURE 7.2-1
TIME INTERVALS AVAILABLE FOR MAKEUP \./ATER INITIATION GIVEN
AUTOMATIC INITIATION OF ISOLATION CONDENSER
Isoln tion condenser ____________ -X initio. tion
Makeup to isolo. tion condenser shell initio. tion
Amendment 16
•- - - - - - - - - - - - -X
Mokeup to RPV initio. tion '--------------------x
t=o Scron
AR #320066 documents the actual time
required to perform the actions I isted in
this figure. The AR is listed in the
DFPPDP, Volume 6, Book 1, Section X
for reference only.
I t=20 nin
I I t=30 nin t=SO nin
DRESDEN STATION UNITS 2 & 3
FIGURE 7.2-2
TIME INTERVALS AVAILABLE FOR
MAKEUP \JATER INITIATION G1VEN
INITIATION OF ISOLATION CONDENSER
15 MINUTES AFTER SCRAM