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ACADs (08-006) Covered

5.1.1.2.1.12c4

5.4.3.3

KeywordsAreas protected, characteristics, detectors used in Halon system,

DescriptionThis document provides instructor notes and references to materials which may be used to create a lesson on the Halon fire protection system.

Supporting Material"Fire Detection and Alarm System", System Training Manual, Article AS-20A

VTM-A430-00001 "Ansul Autopulse Alarm/Suppression Control System, Dual Zone Panel Installation Operation Manual"

IIR 3-3-90-12 "Improper HVAC Damper Positioning"

Fire Protection System, Halon

PALO VERDENUCLEAR GENERATING STATION

Instrumentation & Controls Training

Classroom Lesson

I&C Program Date:

LP Number: NID08C000501 Rev Author: Thomas E. Blank

Title: Fire Protection System, Halon Technical Review:

Duration : 6 Hours

Teaching Approval:

I&C Program Page: 2 of 25

Title: Fire Protection System, Halon Lesson Plan #: NID08C000501

INITIATING DOCUMENTS:

Site Maintenance Training Program Description

REQUIRED TOPICS

NONE

CONTENT REFERENCES

"Fire Detection and Alarm System", System Training Manual, Article AS-20A

VTM-A430-00001 "Ansul Autopulse Alarm/Suppression Control System, Dual Zone Panel Installation Operation Manual"

IIR 3-3-90-12 "Improper HVAC Damper Positioning"

Lesson Plan Revision Data

Feb 13, 2004 Ed Blank Record created

Tasks and Topics Covered

The following tasks are covered in Fire Protection System, Halon:

Task or Topic Number*

Task Statement

Lesson: Fire Protection System, HalonFP01 Troubleshoot and rework the Fire Protection Detection SystemFP03 Perform Fire Protection/Detection Supervisory TestFP02 Perform Fire Protection/Detection Functional Test

Total tasks or topics:

3



TERMINAL OBJECTIVE: 1.1 Given the necessary resource and reference materials, describe the operation and system interfaces

of the Fire Protection Halon system. Mastery will be demonstrated by obtaining an overall average of 80% on a multiple choice exam.

1.1.1 Explain the consideration for working around or with Halon

1.1.2 Identify the areas protected by the Halon system

1.1.3 List the major components of the Halon system

1.1.4 Identify the detectors used in the Halon fire protection system

1.1.5 Describe the operation of the Halon system to include the function and interaction of the system components and the interface with other systems

1.1.6 Describe the operation of the Halon system control panel



Lesson Introduction: Fire Protection System, Halon

The following items are things to consider in your Lesson Introduction. They are not mandatory.You should develop your own introduction and place that material in the Program Hierarchy in the Lesson Introduction Tab or appropriate Training Unit.

CLASSROOM GUIDELINES

If applicable, remind students of class guidelines as posted in the classroom. Pass the attendance sheet around and have it signed in Dark ink. Ensure that student materials needed for the class are available for each student. Emphasize student participation and remind them of your philosophy on asking and answering

questions, if applicable.

ATTENTION STEP

Give a brief statement or story to get student concentration focused on the lesson subject matter.

LESSON INTRODUCTION

Give a brief statement that introduces the specific lesson topic. Should be limited to a single statement.

MOTIVATION

Focus student's attention on the benefits they derive from the training. At Instructor's discretion. The need for motivation in each succeeding lesson must be analyzed by the Instructor and presented as necessary.

Instructor should include how the STAR process can be used to improve or enhance Operator Performance, if applicable.

Read and discuss lesson terminal objective and review lesson enabling objectives, if desired. If applicable, briefly preview the lesson topic outline and introduce the major points to be covered. The

objective review may have been sufficient. REINFORCE the following PVNGS management expectations as opportunities become available

Nuclear SafetyIndustrial Safety Practices STAR and Self-CheckingProcedure ComplianceCommunication StandardsALARAPrevent Events



T.Obj 1.1 Given the necessary resource and reference materials, describe the operation and system interfaces of the Fire Protection Halon system. Mastery will be demonstrated by obtaining an overall average of 80% on a multiple choice exam.



EO 1.1.1 Explain the consideration for working around or with Halon



1.1.1.1 Main Idea



In view of the gas's characteristics, explain the considerations for working around or with Halon 1301.

A)Characteristics of Halon

1) Halon family of gases are altered by replacing their hydrogen atom with a halogen atom

2) Halon 1301 is Bromotriflouromethane (BrCF3)

3) Colorless

4) Odorless

5) Non-corrosive

6) Non-conductive

7) Leaves no residue

1.Hydrogen atom replaced with halogen atom (which can be any one of the elements in Div VIIB; Flourine, Chlorine, Bromine, Iodine, Astatine)

B)Theory of Halon 1301 as an extinguishing agent

1) Total flooding

2) Disrupts the chemical reaction component of the fire tetrahedron

2) Fuel, heat, oxygen, chemical reaction

C) Safety

1) Pressurized to 600 psig using nitrogen propellant, requiring caution during testing

2) Safe to breath

Hazard Assessment: Impact; Falling/Flying Objects

1) Incorporate 1986 event involving the PVNGS Fire Department inadvertant Halon release because of loosening



the wrong valve collar during bottle changeout. Personnel minor injuries. Point out correct collar on T003 (System Description - Halon - Inverter, Comm., Computer Rooms)

a) Concentrations less than 10% and

b) Periods less than 1 minute

3) Decomposition

a) Occurs at approximately 900 degrees F

b) Produces products which are harmful

c) Temperatures probably exist at fire scene

d) Reentry after discharge should not be attempted until area has been properly vented



EO 1.1.2 Identify the areas protected by the Halon system

1.1.2.1 Main Idea

Identify the areas protected by the Halon system.

Areas Protected

A)Rooms housing valuable equipment vulnerable to fire or water spray damage

1) Computer Rooms, 140'CB

2) Communication Room, 120'CB

3) Inverter Room, 120' CB

4) Remote Shutdown Rooms A & B, 100'CB

Refer to P&ID 01-M-FPP-003



EO 1.1.3 List the major components of the Halon system



1.1.3.1 Main Idea

List the major components of the Halon system.

Components

A)Tank assembly

1) Pressure vessel

a) Name plate

b) "O" ring

c) Valve

d) Agent

B)Valve assembly

1) Required as integral part of tank assembly

2) Modes of actuation

a) Electrical (Standard or Explosion proof)

b) Pneumatic

c) Manual

b) not used at PVNGS

3) Operation

a) Valve is closed when differential pressure is zero, normally maintained via vent port thru piston from supply side to control chamber



b) If upper chamber pressure is relieved, delta P increases, the piston is pushed out of the flow path, and the valve opens

i) Bleed port

ii) Low volume flow

iii) Free floating ball valve to check excess flow

c) Valve actuators

i) Electrical

(a) Solenoid valve

(b) Manual valve

(c) Actuation of either type vents upper chamber of valve

i) Describe how solenoid or palm switch pin will actuate schrader valve, releasing pressure from upper chamber



EO 1.1.4 Identify the detectors used in the Halon fire protection system

1.1.4.1 Main Idea

Identify the detectors used in the Halon fire protection system.

A)Detectors

1) Ionization Detectors only in Inverter, Communication, and Computer Rooms

2) Ionization and Thermal Detectors in Remote Shutdown Rooms

B)Discharge hardware

1) Manifold

2) Actuation lines

3) Nozzles

C)Control Panels

1) Ansul Autopulse

2) Pyrotronics CP-30



EO 1.1.5 Describe the operation of the Halon system to include the function and interaction of the system components and the interface with other systems



1.1.5.1 Main Idea



Describe the operation of the Halon system to include the function and interaction of the system components and the interface with other systems as well as any applicable industry events.

Operations

A)Halon stored at 600 psig, providing chemical distribution using N2 propellant

B)No "odorizer" due to Halon's non-toxicity at low concentrations

a)

C)Inverter/Communication/Computer Rooms

1) Manual discharge

C) Refer to M658-00001

a) By pulling lock pin on top of cylinder pneumatic actuator, then pressing red palm button

a) Palm button presses pin into schraeder valve releasing the pressure from the upper valve chamber

b) Discharge (ported from valve body) actuates pressure switch

c) Pressure switch sends signal to control panel for damper actuation, door closures

2) Automatic Discharge

a) Cross-zoned (2 of 2) ionization detectors

b) First detector actuation causes local alarm and lights

c) Both detector actuations cause:

a) Two zones per Ansul panel; One detector from each zone needed before actuation.



i)Local alarm and lights

ii) Additional "pre-discharge horn"

iii) Actuates solenoid valve, pressurizing line

iv) Pressure switch actuates

v) HVAC isolation

vi) Door closures

vii) Complete discharge

3) Pull Station

a) Processed same as dual detector actuation

D) Remote Shutdown Rooms

1) Only electrical manual actuation

2) Automatic actuation

a) "Semi"-crosszoned detectors

b) Actuation of ionization detector causes local audible alarm, indicating light, and computer point alarm

c) Actuation of second detector (thermal) causes:

i)Additional horn/strobe to actuate

ii) Timer to count approximately 20 seconds before energizing the Halon discharge valve solenoid (Asco)



iii) Discharge pressure in header closes pressure switch

iv) HVAC ETL damper closures

v) Complete discharge

d) If Thermal detector actuates first, discharge sequence starts. No Ionization detector needed.

d) Review logic that smoke would likely occur before heat, so 2-detector sequence would likely take place.



EO 1.1.6 Describe the operation of the Halon system control panel



1.1.6.1 Main Idea

Describe the operation of the Halon system control panels.

Control unit

A) Ansul Auto-Pulse A) Refer to Drawings M658-13 Also tell students about addition of test switches 13-pe-fp-163

B) Pyrotronics B) Refer to Drawings M999-4

Panel Interconnection Drawings See 01-E-FPB-005

ETL Dampers Prevent Events: Operating Experience

Cover IIR 3-3-90-12, "Improper HVAC Damper Positioning".

Show class EE580 printout to illustrate ability to determine circuit configuration.

A) Reference 1-E-FPB-004 and 1-E-FPB-005 and M999-4 to illustrate that the ETLs described on M999-4 are "daisy-chained" and terminations are described only in the EE580. 1-E-FPB-005, though scoped for Halon system, does not thoroughly describe the RSD ETL HVAC interface. These circuits are included on 1-E-FPB-004, scoped for CO2 systems.



Shorting or energizing the ETL circuit will affect all these dampers in both the RSD and the ESF SG rooms.

Walkdown Itinerary

A)CO2 Purge Nozzle (Outside SG Room)

B)Transformer Deluge (Note detectors/ID plaques/nozzles)

C)Deluge Panels (Note Indications/controls)

D) Deluge Valves (ID parts, note Emergency Hydraulic Release operation)

E) Ionization Detectors (QK, for load centers, etc.)

F) QK Panel (100' TB Stairwell)

G) CO2 Hosereels (Emphasize Hazards)

H) CO2 Purge Timer/Valve

I) Alarm Check Valve (Behind Instrument Air Pumps; Note parts/operation)

J) Turbine Bearings Deluge (Note manual operation only)

K)Alison panel for condenser vacuum pump exhaust (AR system) (Note thermistor inside as detector)

L) Computer Room Halon (Bottles, Detectors, Panel, Indicators, Nozzle)

M) LCS Protectowire (Note EOLRs/sprinkler heads)

N) Communications\Inverter Halon (Bottles, Detectors, Panel, Indicators, Nozzle)



O) RSD Halon (X2) (Bottle, Panel, ETL Dampers)

P)Battery Room Pyrotronics Panel (In Stairwell)

Q) Battery Room Cardox Panels (outside each room)

R)ESF Cardox Panels (In stairwell and hallway)

S) Diesel Room Rollup door (from QK)

T) Preaction Valves (Note Service Air Input)

U) Protectowire Panels (120' CB)



SUMMARY OF MAIN PRINCIPLESThe following items are things to consider in your lesson summary. They are not mandatory. You should develop your own summary.,

Objectives Review

Review the Lesson Objectives

Topic ReviewRestate the main principles or ideas covered in the lesson. Relate key points to the objectives. Use a question and answer session with the objectives.

Questions and Answers

Oral questioning

Ask questions that implement the objectives. Discuss students answers as needed to ensure the objectives are being met.

Problem Areas

Review any problem areas discovered during the oral questioning, quiz, or previous tests, if applicable. Use this opportunity to solicit final questions from the students (last chance).

Concluding Statement

If not done in the previous step, review the motivational points that apply this lesson to students needs. If applicable, end with a statement leading to the next lesson.

You may also use this opportunity to address an impending exam or practical exercise.

Should be used as a transitional function to tie the relationship of this lesson to the next lesson. Should provide a note of finality.

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