PLANT BOWEN UNIT 3 FLUE GAS DESULFURIZATION …€¦ · 3.5 DCS Control Valve Commands 71 3.6...

Southern Company Generation Bowen Unit 3 Scrubber

Technical Training JBR Vessel System

Advanced Controls Overview Student Guide

Confidential Information of 88

PLANT BOWEN UNIT 3

FLUE GAS DESULFURIZATION SYSTEM

JBR VESSEL SYSTEM

ADVANCED CONTROLS OVERVIEW

NOTE: The Drawings used in this Student Guide are for Training Purposes Only. When troubleshooting these systems in the field always, use the latest drawing revision from the Document Control System.





Table of Contents

ADVANCED CONTROLS OVERVIEW 4

1 Safety Considerations 4

2 Drawing References 5

3 Controls Description 13

3.1 Terms And Definitions 13

3.2 DCS Logic Description 14

3.2.1 JBR Single Element Level Controller 14

3.2.2 JBR Multi Element Level Controller 16

3.2.3 JBR Level Control Manual/Auto Station 18

3.2.4 JBR Flow Controller 20

3.2.5 JBR Narrow Range Level 22

3.2.6 JBR Wide Range Level 23

3.2.7 JBR Level Transmitter Auto Flush 24

3.2.8 JBR Transmitter Manual Flush 28

3.2.9 JBR Level Transmitter A Flush Valve (WF-XV-5020A) 30

3.2.10 JBR Level Transmitter B Flush Valve (WF-XV-5020B) 32

3.2.11 JBR Level Transmitter C Flush Valve (WF-XV-5020C) 34

3.2.12 JBR Density Measurement 36

3.2.13 Gypsum Drawoff Level Error Controller 37

3.2.14 JBR Gypsum Drawoff Density Controller 39

3.2.15 JBR Gypsum Drawoff Controller 41

3.2.16 JBR Ph Measurement 43

3.2.17 JBR Differential Pressure Measurement 44

3.2.18 Limestone Slurry Density Measurement 45

3.2.19 JBR Limestone Slurry Flow Measurement 46

3.2.20 JBR Ph Controller 47

3.2.21 JBR Slurry Flow Controller 50

3.2.22 JBR Wash Control Master 51

3.2.23 JBR Shell And Gas Riser Wash 53

3.2.24 Mist Eliminator Wash 56





Table of Contents

3.3 Instrumentation 59

3.4 Control Valves And Limit Switches 60

3.5 DCS Control Valve Commands 71

3.6 Control Valve Power Supply 74

3.7 Start Permissives 76

3.8 Setpoint And Alarm Limits 77

3.9 Alarm Response 78

4 DCS Tag-Out Process Logic 79

5 DCS Control Screens 87

5.1 Scrubber Jet Bubbling Reactor Level – D3M20008 Screen 87

5.2 Scrubber Jet Bubbling Reactor Wash – D3M20010, 11, 12 Screen 88





ADVANCED CONTROLS OVERVIEW 1 Safety Considerations

1. All Operating Companies Safety and Health Manuals shall be followed at all times.

2. The Southern Company Generation Clearance Procedure shall be followed at all times.

3. A thorough Job Safety Briefing (JSB) shall be completed before beginning work.

4. Employees should always use the proper (Personal Protection Equipment) PPE for the task they are performing.

5. Personnel must observe standard safety precautions when working around or with pressurized piping systems.

6. When using the JBR Vessel System hose stations, personnel must wear protective eyewear at all times. The aim and discharge of pressurized water toward solid surfaces may dislodge dirt or other foreign material into the surrounding environment at a high rate of velocity.

7. Personnel must be aware that many components of the JBR Vessel System are maintained in an automatic mode of operation. The equipment may start at any time without warning.

8. Personnel should remain clear of all rotating machinery, whether operating or in standby, at all times during unit operation.

9. Rotating machinery must never be placed in service without the appropriate equipment guards in place.

10. No attempt should be made to bypass or eliminate equipment safety interlocks. Doing so could result in equipment damage and possible injury to plant personnel.

11. Follow proper Confined Space Entry Procedures when entering confined spaces.

12. When employees are performing work on or associated with exposed lines or equipment energized at 50 volts or more, persons trained in First Aid including Cardiopulmonary Resuscitation (CPR), shall be available within 4 minutes per OSHA 1910.269 requirements.





2 Drawing References

The JBR Vessel System is illustrated on the following drawings:

Number Sheet Rev Title

P&IDs

D3M20008 1 1 FGD Project P&ID – Jet Bubbling Reactor JBR Instrumentation

D3M20009 1 2 FGD Project P&ID – Jet Bubbling Reactor JBR Piping

D3M20010 1 1 FGD Project P&ID – Jet Bubbling Reactor Deck, JBR Shell, & Gas Riser Wash

D3M20011 1 0 FGD Project P&ID – Jet Bubbling Reactor Lower Mist Eliminator Spray System

D3M20012 1 1 FGD Project P&ID – Jet Bubbling Reactor Upper Mist Eliminator Spray System

Functionals

D3F01130 1 0 Scrubber JBR Level Functional Control Diagram

D3F01131 1 0 Scrubber Level Control Valve Functional Control Diagram


D3F01131 3 0 Scrubber Level Control Logic Functional Control Diagram

D3F01132 1 0 Scrubber JBR Level Control Logic Functional Control Diagram

D3F01133 1 0 Scrubber JBR Level Transmitter Flush Logic Functional Control Diagram

D3F01134 1 0 Scrubber JBR Level Transmitter Flush Permits Functional Control Diagram


D3F01136 1 0 Scrubber JBR Level Transmitter A Flush Valve A Functional Control Diagram

D3F01136 2 0 Scrubber JBR Level Transmitter A Flush Valve B Functional Control Diagram







Functionals

D3F01136 3 0 Scrubber JBR Level Transmitter A Flush Valve C Functional Control Diagram

D3F01137 1 A Scrubber JBR Level Transmitter B Flush Valve A Functional Control Diagram

D3F01137 2 A Scrubber JBR Level Transmitter B Flush Valve B Functional Control Diagram

D3F01137 3 A Scrubber JBR Level Transmitter B Flush Valve C Functional Control Diagram

D3F01138 1 A Scrubber JBR Level Transmitter C Flush Valve A Functional Control Diagram

D3F01138 2 A Scrubber JBR Level Transmitter C Flush Valve B Functional Control Diagram

D3F01138 3 A Scrubber JBR Level Transmitter C Flush Valve C Functional Control Diagram

D3F01138 1 A Scrubber JBR Level Transmitter Flush Logic Functional Control Diagram

D3F01139 1 A Scrubber JBR Level Transmitter Flush Logic Functional Control Diagram

D3F01140 1 A Scrubber JBR Wash Control Master Logic Functional Control Diagram

D3F01141 1 A Scrubber JBR Shell And Wall Wash Schedule Functional Control Diagram

D3F01142 1 A Scrubber Mist Eliminator Wash Schedule Functional Control Diagram

D3F01143 1 A Scrubber JBR Shell And Gas Riser Wash Logic Functional Control Diagram

D3F01144 1 A Scrubber Mist Eliminator Wash Logic Functional Control Diagram

D3F01145 1 A Scrubber Mist Eliminator Wash Logic Functional Control Diagram

D3F01150 1 A Scrubber JBR Gas Riser Wash Valve Functional Control Diagram

D3F01151 1 A Scrubber JBR Shell Wash Valve Functional Control Diagram







Functionals

D3F01152 1 A Scrubber JBR Lower Mist Eliminator Valve 5441 Functional Control Diagram













D3F01165 1 0 Scrubber JBR Lower Mist Eliminator Valve 5455 Functional Control Diagram









Functionals



D3F01200 1 0 Scrubber JBR Density Measurement Functional Control Diagram

D3F01201 1 0 Scrubber JBR Density Control Functional Control Diagram

D3F01202 1 0 Scrubber JBR Density Control Logic Functional Control Diagram

D3F01210 1 0 Scrubber JBR Measurements Functional Control Diagram

D3F01211 1 0 Scrubber JBR Limestone Measurements Functional Control Diagram

D3F01212 1 0 Scrubber pH Control Functional Control Diagram

D3F01213 1 0 Scrubber pH Control Logic Functional Control Diagram

D3F01214 1 0 Scrubber pH Control Logic Functional Control Diagram

DCS I/O Wiring Diagrams

E3E30410 1 1 FGD Project - Wiring Diagram - JBR Elect Bldg DCS I/O Cabinet 3100 Power Supply

E3E30410 2 2 FGD Project - Wiring Diagram JBR Elect Bldg DCS I/O Cabinet 3101 Base 0

E3E30410 3 2 FGD Project - Wiring Diagram JBR Elect Bldg DCS I/O Cabine 3101 Base 0










DCS I/O Wiring Diagrams




E3E30411 1 1 FGD Project - Wiring Diagram JBR Elect Bldg DCS I/O Cabinet 3103 Power Supply


E3E30411 3 0 FGD Project - Wiring Diagram JBR Elect Bldg DCS I/O O Cabinet 3104 Base 0







E3E30445 2 2 FGD Project Wiring Diagram DCS I/O Termination Cabinet Equipment No. EE-TC-7001

E3E30445 3 2 FGD Project Wiring Diagram DCS I/O Termination Cabinet Equipment No. EE-TC-7001







Loop Diagrams

B3IMEP5741 1 0 Loop Sheet JBR Mist Eliminator DP ME-PDIT-5741

B3ISKL5021 1 0 Loop Sheet JBR Narrow Range Level SK-LIT-5021A/SK-LIT-5021B/SK-LIT-5021C

B3ISKL5022 1 0 Loop Sheet JBR Wide Range Level SK-LIT-5022A/SK-LIT-5022B/SK-LIT-5022C

B3ISKP5711 1 0 Loop Sheet JBR Differential Pressure SK-PDIT-5711A/SK-PDIT-5711B/SK-PDIT-5711C

B3IWFX5020 1 0 Loop Sheet JBR LVL IND XMTR A Flush Control Valve WF-XV-5020A

B3IWFX5020 2 0 Loop Sheet JBR LVL IND XMTR A Flush Control Valve WF-XV-5020B

B3IWFX5020 3 0 Loop Sheet JBR LVL IND XMTR A Flush Control Valve WF-XV-5020C

B3ISKF5030 1 0 Loop Sheet JBR Level Control Flow SK-FIT-5030

B3ISKF5030 2 0 Loop Sheet JBR Level Control Flow SK-FIT-5030

B3IMUX5421 1 0 Loop Sheet JBR Gas Riser Wash Control Valve MU-XV-5421

B3IMUX5431 1 0 Loop Sheet JBR Shell Wash Control Valve MU-XV-5431

B3IMEX5441 1 0 Loop Sheet Lower Mist Eliminator Control Valve ME-XV-5441







Loop Diagrams









B3IMEX5451 1 0 Loop Sheet Upper Mist Eliminator Control Valve ME-XV-5451














Loop Diagrams


B3IMUX5421 1 0 Loop Sheet JBR Gas Riser Wash Control Valve MU-XV-5421

B3IMUX5431 1 0 Loop Sheet JBR Shell Wash Control Valve MU-XV-5431

Vendor O&M Manuals

S52284 1 A FGD - Scrubber - 2 1/2" TSC As A-90 Deck Wash Nozzle

S52287 1 0 FGD - Scrubber - 3/8" MP 218 A-115 Wall Wash Nozzle

S81395 1 A FGD - Scrubber - 1/2" MP 218 A-110 Wall Wash Nozzle

S81397 1 C FGD - Scrubber - 2 1/2" TSC 87 A-90 Deck Wash Nozzle

S81430 1 F Scrubber - FGD - Mist Elimination System - General Arrangement

S81432 1 A Scrubber - FGD - Mist Elimination System - Operation & Maintenance Manual

S82393 1 C Scrubber - FGD - Mist Elimination System - General Arrangement - Lower Spray Wash System

S82788 1 A FGD - Scrubber - JBR Sparger Tube Alignment Grid Module Sheet 2

S82789 1 A FGD - Scrubber - JBR Sparger Tube Alignment Grid - Details Sheet 3

S85397 1 0 FGD - Scrubber - 1/2" MP 218 A-110 Wall Wash Nozzle - Final Inspection Report

S85399 1 A FGD - Scrubber - 2 1/2" TSC 87 A-90 Deck Wash Nozzle - Final Inspection Report

S90677 1 A Scrubber-FGD- JBR Inlet Duct Internal Piping- Quality Manual





3 Controls Description

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR Vessel System including alarms, permissives, interlocks, trips, and equipment modes of operation.

3.1 Terms and Definitions

1. Mode

A MODE is a defined set of operating conditions (recipe, sequence, automatic start/stop, interlocks) that controls a group of items of the process. A MODE is used to reduce/simplify operator interaction and/or optimize control of the process.

2. Interlock

An INTERLOCK is a condition that stops an item of the process from running regardless of the DCS mode of control (Auto/Manual status) or Operator intervention. An Interlock is used to reduce risk to personnel, avoid damage to equipment in the plant, or stop a release of material into the environment. An Interlock may also be used to stop-close an item of the process based on the action of another item of the process.

3. Permissive

A PERMISSIVE is a condition that must be met in order for an item of the process to start regardless of the DCS mode of control (Auto/Manual status) or Operator intervention. A Permissive is used to reduce risk to personnel, avoid damage to equipment in the plant, or stop a release of material into the environment. A Permissive may also be used to start-open an item of the process based on the action of another item of the process.

4. Alarm

An ALARM is a condition that notifies the operator of an unplanned event in the process (i.e., without “Mode” or Operator intervention). An Alarm is used to notify personnel of process upsets, unplanned stop/start of an item of the process, an equipment trip, or a reached limit.





3.2 DCS Logic Description

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR Vessel System including alarms, permissives, interlocks, trips, and equipment modes of operation.

3.2.1 JBR Single Element Level Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR SINGLE ELEMENT LEVEL CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functionals



JBR SINGLE ELEMENT LEVEL CONTROLLER, automatically calculates a valve position setpoint for JBR LEVEL CONTROL MANUAL/AUTO STATION based on JBR Narrow Range Level Measurement and JBR Normal Liquid Level

At the DCS, JBR SINGLE ELEMENT LEVEL CONTROLLER is equipped with the following controls:

MANUAL: Allows the DCS Operator to manipulate controller output through a range of 0-100%

AUTO: DCS automatically modulates controller output through a range of 0-100%





3.2.1 JBR Single Element Level Controller

JBR Single Element Level Controller

If any JBR Level Transmitter is being flushed, controller output is held at current value

When controller is not active, output tracks JBR LEVEL CONTROL MANUAL/AUTO STATION output to allow for bumpless transfer when controller is activated

Controller is active when ONE or ALL of the following are true:

Element Condition True Not True Selected Not Selected SINGLE ELEMENT

OVERRIDE X

JBR LEVEL CONTROL FLOW (MU-FIT-5030)

Signal Flagged Bad X

JBR MAKE UP HEADER FLOW (MU-FIT-5135)


GYPSUM DRAWOFF FLOW (GD-FIT-5654)


JBR LS SLURRY FLOW A (LS-FIT-5589A)


JBR LS SLURRY FLOW B (LS-FIT-5589B)


JBR PREQUENCH SPRAY FLOW A (PQ-FIT-5132A)


JBR PREQUENCH SPRAY FLOW B (PQ-FIT-5132B)


FGD Diverter Damper Online Position X FGD Diverter Damper

Position Signal Flagged Bad X

Unit Load Signal Flagged Bad X

Controller Logic

Automatically sums an Output by calculating Setpoint and Process Variable inputs

Output: Setpoint for JBR LEVEL CONTROL MANUAL/AUTO STATION

Setpoint: JBR Normal Liquid Level setpoint

Process Variable: JBR Narrow Range Level Measurement





3.2.2 JBR Multi Element Level Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR MULTI ELEMENT LEVEL CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functionals



JBR MULTI ELEMENT LEVEL CONTROLLER, automatically calculates a flow setpoint for JBR FLOW CONTROLLER based on JBR Narrow Range Level Measurement and JBR Normal Liquid Level.

At the DCS, JBR MULTI ELEMENT LEVEL CONTROLLER is equipped with the following controls:

MANUAL: Allows the operator to manipulate controller output.

AUTO: DCS automatically modulates controller output.





3.2.2 JBR Multi Element Level Controller

JBR Multi Element Level Controller Logic

If any JBR Level Transmitter is being flushed, controller output is held at current value

When controller is not active, output tracks the difference of the following calculations:

FLOW IN: The sum of JBR Make-Up Water Flow, Level Control Flow, Limestone Slurry Flow and Pre-Quench Flow measurements

FLOW OUT: The sum of JBR Plume Flow (calculated from plant load) and Gypsum Draw off Flow measurements


True Not True Selected Not Selected SINGLE ELEMENT

OVERRIDE X

















Unit Load Signal Flagged Bad X

Controller Logic

Automatically sums an Output by calculating Setpoint and Process Variable inputs.

Output: Setpoint for JBR FLOW CONTROLLER

Setpoint: JBR Normal Liquid Level setpoint

Process Variable: JBR Narrow Range Level measurement





3.2.3 JBR Level Control Manual/Auto Station

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR LEVEL CONTROL MANUAL / AUTO STATION including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR LEVEL CONTROL MANUAL/AUTO STATION, allows for manual or automatic control of JBR LEVEL CONTROL VALVE (SK-LV-5021).

At the DCS, JBR SINGLE ELEMENT LEVEL CONTROLLER is equipped with the following controls:

MANUAL: Allows the operator to manipulate controller output effectively changing valve position.

AUTO: DCS automatically modulates controller output effectively changing valve position.

TAGOUT: Designates JBR LEVEL CONTROL VALVE (SK-LV-5021) to the DCS Tagout List.





3.2.3 JBR Level Control Manual/Auto Station

JBR Level Control Manual/Auto Station Controller

Modulates valve position from 0-100% either automatically or manually

Controller is forced to MANUAL and cannot be placed in AUTO if any one of three Narrow Range Level transmitters deviate greater than >1% from the median value

Controller Logic

Sums an Output range of 0-100% equal to Setpoint input.

Output: Demand to JBR LEVEL CONTROL VALVE (SK-LV-5021).

Setpoint: Output from SINGLE ELEMENT FLOW CONTROLLER or MULTI ELEMENT FLOW CONTROLLER.





3.2.4 JBR Flow Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR FLOW CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR FLOW CONTROLLER, automatically calculates a valve position setpoint for JBR LEVEL CONTROL MANUAL/AUTO STATION based on JBR MULTI ELEMENT LEVEL CONTROLLER output corrected with flow out of the JBR and calculated flow into the JBR.

At the DCS, JBR FLOW CONTROLLER is equipped with the following controls:

MANUAL: Allows the DCS Operator to manipulate controller output.






3.2.4 JBR Flow Controller

JBR Flow Controller

When Controller is not active, output tracks JBR LEVEL CONTROL MANAUL/AUTO STATION output to allow for bumpless transfer when controller is activated.


True Not True Selected Not Selected SINGLE ELEMENT

OVERRIDE X

















Unit Load Signal Flagged Bad X Controller Logic


Output: Setpoint for JBR LEVEL CONTRL MANUAL/AUTO STATION.

Setpoint: JBR MULTI ELEMENT LEVEL CONTROLLER Output summed with the sum of JBR Plume Flow (calculated from plant load) and Gypsum Draw off Flow measurements.

Process Variable: The sum of JBR Make-Up Water Flow, Level Control Flow, Limestone Slurry Flow and Pre-Quench Flow measurements.





3.2.5 JBR Narrow Range Level

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR NARROW RANGE LEVEL including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Three level transmitters ranged 0-36 inwc measure JBR liquid level.

SK-LIT-5021A

SK-LIT-5021B

SK-LIT-5021C

Each level transmitter sends a 4-20ma signal to the DCS representative of JBR liquid level. The median value of all three signals make up JBR NARROW RANGE LEVEL indication and is used for dynamic JBR liquid level control

If any of the three transmitters deviate greater than 1% from the median value:

JBR LEVEL CONTROL MANUAL AUTO STATION is forced to MANUAL and cannot be placed in AUTO until the deviation is no longer present

A transmitter deviation alarm is annunciated

Transmitter Auto Flush is prevented





3.2.6 JBR Wide Range Level

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR WIDE RANGE LEVEL including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Three level transmitters ranged 0-180 inwc are used to measure JBR liquid level

SK-LIT-5022A

SK-LIT-5022B

SK-LIT-5022C

Each level transmitter sends a 4-20ma signal to the DCS representative of JBR liquid level. The median value of all three signals is corrected with JBR SLURRY DENSITY to make up JBR WIDE RANGE LEVEL indication and is used for operating alarms and equipment interlocks.

If any of the three transmitters deviate greater than 1% from the median value:

A transmitter deviation alarm is annunciated

Transmitter Auto Flush is prevented from operating





3.2.7 JBR Level Transmitter Auto Flush

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR LEVEL TRANSMITTER AUTO FLUSH including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR LEVEL TRANSMITTER AUTO FLUSH cycles JBR Level Transmitter A, B & C Flush Valves open in sequence six times daily

At the DCS, the JBR Level Transmitter Auto Flush is equipped with the following controls:

AUTO FLSH SEQ ON: Enables sequence that automatically opens and closes transmitter flush valves

AUTO FLSH SEQ OFF: Disables sequence that automatically opens and closes transmitter flush valves






The JBR LEVEL TRANSMITTER AUTO FLUSH function cycles Level Transmitter Auto Flush Valves (WF-XV-5020A, B & C) open and close in a sequence.

The sequence is scheduled to take place six times daily:

1st Flush @ 0100

2nd Flush @ 0500

3rd Flush @ 0900

4th Flush @ 1300

5th Flush @ 1700

6th Flush @ 2100

If a flush valve is in MANUAL it is skipped and the sequence continues

If feedback OPEN for any of the three flush valves is not received in a 24 hour period, an alarm is annunciated

Only one transmitter can be flushed at any given time

JBR LEVEL TRANSMITTER AUTO FLUSH sequence logic

Permissives

True Not True Selected Not Selected JBR LEVEL

TRANSMITTER AUTO FLUSH

AUTO FLSH SEQ ON X

DIVERERTER DAMPER In FGD Bypass Position X

JBR WR LEVEL Signal Deviation X

JBR NR LEVEL Signal Deviation X

JBR WR LEVEL > 8.8 Feet X

JBR WR LEVEL < 18 Feet X






Meet All Permissives

Flush Initiated

300 second timer for JBR LEVEL TRANSMITTER B AUTO FLUSH

600 second timer for JBR LEVEL TRANSMITTER C AUTO FLUSH

JBR LEVEL TRANSMITTER A FLUSH VALVE (WF-XV-5020A) status AUTO

JBR LEVEL TRANSMITTER B status NOT FLUSHING

JBR LEVEL TRANSMITTER C status NOT FLUSHING

120 second timer to allow 30 second Flushing Time and 90 seconds for signal to settle after flushing has completed

JBR LEVEL TRANSMITTER A status FLUSHING

30 second timer

JBR LEVEL TRANSMITTER A FLUSH VALVE (WF-XV-5020A) command OPEN

JBR LEVEL TRANSMITTER A FLUSH VALVE (WF-XV-5020A) feedback OPEN

30 second timer TIMED OUT

JBR LEVEL TRANSMITTER A FLUSH VALVE (WF-XV-5020A) command OPEN removed

JBR LEVEL TRANSMITTER A FLUSH VALVE (WF-XV-5020A) feedback CLOSED


JBR LEVEL TRANSMITTER A status NOT FLUSHING

300 second timer for JBR LEVEL TRANSMITTER B AUTO FLUSH TIMED OUT

JBR LEVEL TRANSMITTER B FLUSH VALVE (WF-XV-5020B) status AUTO









JBR LEVEL TRANSMITTER B status FLUSHING

30 second timer

JBR LEVEL TRANSMITTER B FLUSH VALVE (WF-XV-5020B) command OPEN

JBR LEVEL TRANSMITTER B FLUSH VALVE (WF-XV-5020B) feedback OPEN


JBR LEVEL TRANSMITTER B FLUSH VALVE (WF-XV-5020B) command OPEN removed

JBR LEVEL TRANSMITER B FLUSH VALVE (WF-XV-5020B) feedback CLOSED



600 second timer for JBR LEVEL TRANSMITTER C AUTO FLUSH TIMED OUT

JBR LEVEL TRANSMITTER C FLUSH VALVE (WF-XV-5020C) status AUTO




JBR LEVEL TRANSMITTER C status FLUSHING

30 second timer

JBR LEVEL TRANSMITTER C FLUSH VALVE (WF-XV-5020C) command OPEN

JBR LEVEL TRANSMITTER C FLUSH VALVE (WF-XV-5020C) feedback OPEN


JBR LEVEL TRANSMITTER C FLUSH VALVE (WF-XV-5020B) command OPEN removed

JBR LEVEL TRANSMITTER C FLUSH VALVE (WF-XV-5020C) feedback CLOSED







3.2.8 JBR Transmitter Manual Flush

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR TRANSMITTER MANUAL FLUSH including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR LEVEL TRANSMITTER MANUAL FLUSH automatically opens and closes the selected JBR Level Transmitter Flush Valve in a sequence

At the DCS, the JBR LEVEL TRANSMITTER MANUAL FLUSH is equipped with the following controls:

MANUAL FLUSH: Starts a sequence that automatically opens and closes the selected flush valve





3.2.8 JBR Transmitter Manual Flush

A manual flush can be performed while JBR LEVEL TRANSMITTER AUTO FLUSH is activated.

JBR TRANSMITTER MANUAL FLUSH sequence logic

Permissives

True Not True Selected Not Selected

DIVERERTER DAMPER In FGD Bypass Position X

JBR WR LEVEL Signal Deviation X

JBR NR LEVEL Signal Deviation X

JBR WR LEVEL > 8.8 Feet X

JBR WR LEVEL < 18 Feet X CORRESPONDING JBR LEVEL TRANSMITTER

FLUSH VALVE AUTO X

REMAINING JBR LEVEL TRANSMITTERS

FLUSHING X

Meet all permissives

Select corresponding JBR LEVEL TRANSMITTER MANUAL FLUSH MANUAL FLUSH


Corresponding JBR LEVEL TRANSMITTER status FLUSHING

30 second timer

Corresponding JBR LEVEL TRANSMITTER FLUSH VALVE command OPEN

Corresponding JBR LEVEL TRANSMITTER FLUSH VALVE feedback OPEN


Corresponding JBR LEVEL TRANSMITTER FLUSH VALVE command OPEN removed

Corresponding JBR LEVEL TRANSMITTER FLUSH VALVE feedback CLOSED


Corresponding JBR LEVEL TRANSMITTER status NOT FLUSHING





3.2.9 JBR Level Transmitter A Flush Valve (WF-XV-5020A)

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR TRANSMITTER A FLUSH VALVE (WF-XV-5020A) including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawings:


Functionals

D3F01136 1 0 Scrubber JBR Level Transmitter A Flush Valve Functional Control Diagram

D3F01137 1 0 Scrubber JBR Level Transmitter B Flush Valve Functional Control Diagram

D3F01138 1 0 Scrubber JBR Level Transmitter C Flush Valve Functional Control Diagram

JBR TRANSMITTER A FLUSH VALVE (WF-XV-5020A) controls the flow of Make-Up Water to both JBR NARROW RANGE TRANSMITTER A (SK-LIT-5021A) and JBR WIDE RANGE LEVEL TRANSMITTER A (SK-LIT-5022A) sensing lines.

At the DCS, JBR TRANSMITTER A FLUSH VALVE (WF-XV-5020A) is equipped with the following controls.

AUTO: Allows DCS TRANSMITTER AUTO FLUSH and TRANSMITTER MANAUL FLUSH logic to automatically open and close valve as needed

OPEN: Issues open command

CLOSE: Removes open command

TAGOUT: Designates valve to DCS Tagout list and inhibits operation





3.2.9 JBR Level Transmitter A Flush Valve (WF-XV-5020A)

JBR TRANSMITTER A FLUSH VALVE control logic

Automatic control allows JBR LEVEL TRANSMITTER AUTO FLUSH and JBR LEVEL TRANSMITTER MANUAL FLUSH logic to open and close valve as needed

If an OPEN or CLOSE command is issued, valve is removed from AUTO

Alarms

Alarm When

JBR LEVEL TRANSMITTER A FLUSH VALVE FAILED

Feedback OPEN is not received within 5 seconds after OPEN command is issued

Feedback CLOSED is present for greater than 5 seconds after OPEN command is issued

JBR LEVEL TRANSMITTER A 24 HR W/O FLUSH Feedback OPEN is not received within 24 hours

Permissives


TRANSMITTER A FLUSH VALVE

DCS Tagout X

JBR LEVEL TRANSMITTER B FLUSH

VALVE CLOSED for 30 seconds X

JBR LEVEL TRANSMITTER C FLUSH


Valve DCS Control Open

Meet all Permissives

Select valve control OPEN

Valve command OPEN

Valve feedback OPENED

Valve DCS Control Close

Select valve control CLOSE

Valve command OPEN removed

Valve feedback CLOSED





3.2.10 JBR Level Transmitter B Flush Valve (WF-XV-5020B)

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR TRANSMITTER B FLUSH VALVE (WF-XV-5020B) including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawings:


Functionals




JBR TRANSMITTER B FLUSH VALVE (WF-XV-5020B) controls the flow of Make-Up Water to both JBR NARROW RANGE TRANSMITTER B (SK-LIT-5021B) and JBR WIDE RANGE LEVEL TRANSMITTER B (SK-LIT-5022B) sensing lines

At the DCS, JBR TRANSMITTER B FLUSH VALVE (WF-XV-5020B) is equipped with the following controls









3.2.10 JBR Level Transmitter B Flush Valve (WF-XV-5020B)

JBR TRANSMITTER B FLUSH VALVE control logic


If an OPEN or CLOSE command is issued, valve is removed from AUTO

Alarms

Alarm When

JBR LEVEL TRANSMITTER B FLUSH VALVE FAILED



JBR LEVEL TRANSMITTER B 24 HR W/O FLUSH Feedback OPEN is not received within 24 hours

Permissives


TRANSMITTER B FLUSH VALVE

DCS Tagout X

JBR LEVEL TRANSMITTER A FLUSH


JBR LEVEL TRANSMITTER C FLUSH





Valve command OPEN










3.2.11 JBR Level Transmitter C Flush Valve (WF-XV-5020C)

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR TRANSMITTER C FLUSH VALVE (WF-XV-5020C) including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawings:


Functionals




JBR TRANSMITTER B FLUSH VALVE (WF-XV-5020C) controls the flow of Make-Up Water to both JBR NARROW RANGE TRANSMITTER C (SK-LIT-5021C) and JBR WIDE RANGE LEVEL TRANSMITTER C (SK-LIT-5022C) sensing lines

At the DCS, JBR TRANSMITTER C FLUSH VALVE (WF-XV-5020C) is equipped with the following controls









3.2.11 JBR Level Transmitter C Flush Valve (WF-XV-5020C)

JBR TRANSMITTER B FLUSH VALVE control logic


If an OPEN or CLOSE command is issued, valve is removed from AUTO.

Alarms

Alarm When

JBR LEVEL TRANSMITTER C FLUSH VALVE FAILED



JBR LEVEL TRANSMITTER C 24 HR W/O FLUSH Feedback OPEN is not received within 24 hours

Permissives


TRANSMITTER BC FLUSH VALVE

DCS Tagout X

JBR LEVEL TRANSMITTER A FLUSH


JBR LEVEL TRANSMITTER B FLUSH





Valve command OPEN










3.2.12 JBR Density Measurement

The following subsections contain narrative interpretations of the DCS Logic and controls associated with the JBR DENSITY MEASUREMENT including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional

D3F01200 1 0 Scrubber JBR Density Measurement Functional Control Diagram

Two Density Transmitters ranged 0-35% measure slurry density downstream of the Gas Cooling Pumps

GD-DT-5655A

GD-DT-5655B

Each Density transmitter sends a 4-20ma signal to the DCS representative of slurry density. The average of the two signals makes up JBR DENSITY MEASURMENT

When no gas cooling pumps are running, last JBR DENSITY MEASURMENT is held

If both transmitter input signals are flagged bad or signals deviate +/- 4% from one another for more than 2 seconds:

JBR DENSITY CONTROLLER is forced to MANUAL and cannot be placed in AUTO until deviation is no longer present

Alarms

Alarm When JBR DENSITY HIGH Density measurement greater than 22%

JBR DENSITY LOW Density measurement less than 8%

JBR DENSITY TRANSMITTER DEVIATION Both transmitter signals are flagged bad High or low deviation and signal bypass is

selected





3.2.13 Gypsum Drawoff Level Error Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR GYPSUM DRAWOFF LEVEL ERROR CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR GYPSUM DRAWOFF LEVEL ERROR CONTROLLER automatically calculates a flow setpoint for JBR GYPSUM DRAWOFF CONTROLLER based on JBR SINGLE ELEMENT CONTROLLER error and a static setpoint of -5.

At the DCS, JBR GYPSUM DRAWOFF LEVEL ERROR CONTROLLER is equipped with the following controls:







3.2.13 Gypsum Drawoff Level Error Controller

Gypsum Drawoff Level Error Controller

When Process Variable of JBR SINGLE ELEMENT LEVEL CONTROLLER deviates more than 5 from setpoint, GYPSUM DRAWOFF LEVEL ERROR CONTROLLER assists in reducing that error by increasing Gypsum Draw off Flow

Controller is not active when JBR Narrow Range Level is flagged bad

Controller Logic


Output: Summed with JBR GYPSUM DRAWOFF DENSITY CONTROLLER Output

Setpoint: Static value of -5

Process Variable: JBR SINGLE ELEMENT LEVEL CONTROLLER control error





3.2.14 JBR Gypsum Drawoff Density Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR GYPSUM DRAWOFF DENSITY CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR GYPSUM DRAWOFF DENSITY CONTROLLER automatically calculates a flow setpoint for JBR GYPSUM DRAWOFF CONTROLLER based on JBR Slurry Density Measurement and a static setpoint of 20% solids by weight.

At the DCS, JBR GYPSUM DRAWOFF DENSITY CONTROLLER is equipped with the following controls:







3.2.14 JBR Gypsum Drawoff Density Controller

If no Gas Cooling Pump is running, JBR Gypsum Density measurement is flagged bad or JBR GYPSUM DRAWOFF CONTROLLER is in MANUAL, output tracks to the difference of Gypsum Draw off Flow Measurement and GYPSUM DRAWOFF LEVEL ERROR CONTROLLER output

If JBR GYPSUM DRAWOFF CONTROLLER is in AUTO, JBR GYPSUM DRAWOFF DENSITY CONTROLLER is forced to AUTO

Controller Logic


Output: Setpoint for JBR GYPSUM DRAWOFF CONTROLLER

Setpoint: 20% solids by weight

Process Variable: JBR Slurry Density Measurement





3.2.15 JBR Gypsum Drawoff Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR GYPSUM DRAWOFF CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR GYPSUM DRAWOFF CONTROLLER positions JBR Gypsum Draw off Density Control Valve based on Gypsum Draw off Flow and JBR GYPSUM DRAWOFF DENSITY CONTROLLER output

At the DCS, JBR GYPSUM DRAWOFF CONTROLLER is equipped with the following controls:



TAGOUT: Designates JBR GYPSUM DRAWOFF DENSITY CONTROL VALVE (GD-DV-5655) to the DCS Tagout List





3.2.15 JBR Gypsum Drawoff Controller

JBR Gypsum Drawoff Controller

If the following criteria are met, controller is forced to manual:

True Not True Selected Not Selected JBR Gypsum Draw off

Controller DCS Tagout X

OR

Gypsum Draw off Flow Signal

Flagged Bad X

OR

Gypsum Draw off Pump A Running X OR

Gypsum Draw off Pump B Running X

If the following criteria are met, JBR GYPSUM DRAWOFF DENSITY CONTROL VALVE (GD-DV-5655) is forced closed:


Gypsum Draw off Pump A Running X OR

Gypsum Draw off Pump B Running X

Controller Logic


Output: Demand to JBR GYPSUM DRAWOFF DENSITY CONTROL VALVE (GD-DV-5655)

Setpoint: Output from JBR GYPSUM DRAWOFF DENSITY CONTROLLER

Process Variable: Gypsum Draw off Flow Measurement





3.2.16 JBR pH Measurement

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR pH MEASURMENT including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Three level transmitters ranged 0-10 pH measure JBR Slurry pH

SK-AIT 5011A

SK-AIT-5011B

SK-AIT-5011C

Each level transmitter sends a 4-20ma signal to the DCS representative of JBR Slurry pH. The median value of all three signals make up JBR pH measurement

If any of the three transmitters deviate greater than 1% from the median value, JBR pH controller is forced to MANUAL and cannot be placed in AUTO until the deviation is no longer present.

Alarms

Alarm When JBR pH HIGH HIGH (diverter damper in online position) pH measurement greater than 5.5

JBR pH HIGH HIGH (diverter damper in bypass position) pH measurement greater than 10

JBR pH LOW LOW (diverter damper in online position) pH measurement less 4.5

JBR pH LOW LOW (diverter damper in bypass position) pH measurement less than 0

JBR pH TRANSMITTER DEVIATION If any transmitter deviates greater than 1%





3.2.17 JBR Differential Pressure Measurement

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR DIFFERENTIAL PRESSURE MEASURMENT including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Three differential pressure transmitters ranged 0-30 inwc measure JBR Differential Pressure

SK-PDIT-5711A

SK-PDIT-5711B

SK-PDIT-5711C

Each differential pressure transmitter sends a 4-20ma signal to the DCS representative of the differential pressure between the JBR Vessel and JBR Exhaust. The median value of all three signals make up JBR DIFFERENTIAL PRESSURE measurement

JBR differential pressure greater than 28 INWC or less than 10 INWC triggers and alarm.





3.2.18 Limestone Slurry Density Measurement

The following subsections contain narrative interpretations of the DCS Logic and controls associated with LIMESTONE SLURRY DENSITY MEASURMENT including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Two density transmitters, ranged 0-45% Solids, measure Limestone Slurry Density

LS-DT-5586A

LS-DT-5586B

Each density transmitter sends a 4-20ma signal to the DCS representative of Limestone Slurry Density. The average of the two signals make up LIMESTONE SLURRY DENSITY measurement.


Output to JBR pH controller is held at last value

Alarms

Alarm When

LIMESTONE SLURRY DENSITY TRANSMITTER DEVIATION

Both transmitter signals are flagged bad High or low deviation and signal bypass is

selected





3.2.19 JBR Limestone Slurry Flow Measurement

The following subsections contain narrative interpretations of the DCS Logic and controls associated with LIMESTONE SLURRY FLOW MEASURMENT including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


Two Flow Transmitters ranged 0-500 gpm measure limestone slurry flow out of the JBR.

LS-FIT-5589A

LS-FIT-5589B

Each transmitter sends a 4-20ma signal to the DCS representative of limestone slurry flow out of the JBR. The average of the two signals make up JBR LIMESTONE SLURRY FLOW measurement.


JBR GYPSUM DRAWOFF CONTROLLER is forced to MANUAL and cannot be placed in AUTO until deviation is no longer present

JBR SINGLE ELEMENT LEVEL CONTROLLER is activated

JBR MULTI ELEMENT LEVEL CONTROLLER is de-activated

Alarms

Alarm When

JBR LIMESTONE SLURRY FLOW TRANSMITTER DEVIATION

Both transmitter signals are flagged bad High or low deviation and signal bypass is

selected





3.2.20 JBR pH Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR pH controller including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR pH controller automatically calculates a flow setpoint for JBR SLURRY FLOW controller based on JBR pH measurement and a static setpoint of 5.2.

At the DCS, JBR pH controller is equipped with the following controls:



JBR pH Controller


True Not True Selected Not Selected JBR SLURRY FLOW

CONTROLLER Manual X

AND

JBR pH Flagged Bad X OR

BYPASS DIVERTER DAMPER POSITION

Flagged Bad X

OR

Plant Load Flagged Bad X

If the following criteria are met, controller is forced to auto and will track to LIMESTONE SLURRY FLOW measurement for two seconds:

True Not True Selected Not Selected JBR SLURRY FLOW

CONTROLLER Auto X






Alarms

Alarm When

pH Manual JBR Slurry Flow Controller is in manual JBR pH Controller is in manual

pH Low JBR pH Controller error is <-0.2

-AND- Scrubber Diverter Damper is not in bypass

pH High JBR pH Controller error is >0.2

-AND- Scrubber Diverter Damper is not in bypass

Controller Logic


Output: Setpoint for JBR SLURRY FLOW CONTROLLER

Setpoint: 5.2 pH

Process Variable: JBR pH measurement






A feed forward control is used to compensate for unit load changes. Output of the JBR pH controller is biased either upward for increasing load, or downward for decreasing load over a several second period. This is to anticipate change in pH due to increase or decrease of absorbed SO2. Limestone Slurry Density measurement is used to bias the feed forward calculation.





3.2.21 JBR Slurry Flow Controller

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR SLURRY FLOW CONTROLLER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional


JBR SLURRY FLOW controller positions JBR Limestone Flow Control Valve based on Limestone Slurry Flow and JBR pH controller output

At the DCS, JBR SLURRY FLOW controller is equipped with the following controls:

MANUAL: Allows the DCS Operator to manipulate controller output


TAGOUT: Designates JBR Limestone Flow Control Valve to the DCS tagout list and holds current valve position when selected.

JBR Slurry Flow Controller


True Not True Selected Not Selected JBR Limestone Slurry

Flow Flagged Bad X

OR

JBR Limestone Flow Control Valve

Tagout X

Controller Logic


Output: Demand to JBR Limestone Flow Control Valve

Setpoint: Output from JBR pH controller

Process Variable: Limestone Slurry Flow Measurement





3.2.22 JBR Wash Control Master

The following subsections contain narrative interpretations of the DCS Logic and controls associated with JBR WASH CONTROL MASTER including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawing:


Functional

D3F01140 1 0 Scrubber JBR Wash Control Master Logic Functional Control Diagram

JBR WASH CONTROL MASTER enables or disables JBR Shell, Gas Riser, and Mist Eliminator automatic wash sequences.

When JBR WASH CONTROL MASTER is on, all washes are automatically executed at scheduled times

When JBR WASH CONTROL MASTER is off, washes are not automatically executed however can be initiated manually





3.2.22 JBR Wash Control Master

At the DCS, the JBR WASH CONTROL MASTER is equipped with the following controls:

WASH CTRL SEQ ON: Enables JBR Shell, Gas Riser, and Mist Eliminator automatic wash sequences.

WASH CTRL SEQ OFF: Disables JBR Shell, Gas Riser, and Mist Eliminator automatic wash sequences.





3.2.23 JBR Shell and Gas Riser Wash

The following subsections contain narrative interpretations of the DCS logic and controls associated with JBR SHELL AND GAS RISER WASH including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawings:


Functionals

D3F01141 1 0 JBR Shell And Gas Riser Wash Schedule Functional Control Diagram

D3F01143 1 0 JBR Shell And Gas Riser Wash Logic Functional Control Diagram

3 JBR SHELL AND GAS RISER WASH opens and closes JBR Gas Riser and Shell wash valves in a sequence

At the DCS, 3 JBR Shell and Gas Riser Wash is equipped with the following controls:

SHELL/GAS RISER MANUAL WASH: Initiates Shell and Gas Riser Wash sequence

SHELL/GAS RISER WASH ABORT: Terminates current Shell and Gas Riser Wash sequence






The JBR SHELL AND GAS RISER WASH cycles Gas Riser and Shell wash valves open and close in a sequence

The sequence is scheduled to start every two hours beginning at 0017

Each valve is open for two minutes beginning with the Gas Riser Wash Valve followed by the Wall Wash Valve 60 minutes later providing permissives are met

If permissives are not met, wash sequence is prevented with the exception of every fourth wash (e.g. 0617, 1417 and 2217)

Washes are carried out automatically when JBR WASH CONTROL MASTER is active

Permissives


JBR WR Level High X AND

JBR Density Low X

JBR SHELL AND GAS RISER WASH sequence logic


Wash Initiated and set

3600 second timer

120 second pulse

JBR GAS RISER WASH VALVE (MU-XV-5421) status AUTO

JBR GAS RISER WASH VALVE (MU-XV-5421) command OPEN

JBR GAS RISER WASH VALVE (MU-XV-5421) feedback OPEN

120 second pulse TIMED OUT

JBR GAS RISER WASH VALVE (MU-XV-5421) command OPEN removed






JBR GAS RISER WASH VALVE (MU-XV-5421) feedback CLOSE


120 second timer

120 second pulse

JBR SHELL WASH VALVE (MU-XV-5431) status AUTO

JBR SHELL WASH VALVE (MU-XV-5431) command OPEN

JBR SHELL WASH VALVE (MU-XV-5431) feedback OPEN


JBR SHELL WASH VALVE (MU-XV-5431)) command OPEN removed


JBR SHELL WASH VALVE (MU-XV-5431) feedback CLOSE

Wash complete and reset





3.2.24 Mist Eliminator Wash

The following subsections contain narrative interpretations of the DCS Logic and controls associated with MIST ELIMINATOR WASH logic including alarms, permissives, interlocks, trips, and equipment modes of operation.

Refer to Drawings:


Functionals

D3F01142 1 0 Scrubber Mist Eliminator Wash Schedule Functional Control Diagram

D3F01144 1 0 Scrubber Mist Eliminator Wash Logic Functional Control Diagram

D3F01145 1 0 Scrubber Mist Eliminator Wash Logic Functional Control Diagram

MIST ELIMINATOR WASH opens and closes Upper and Lower Mist Eliminator wash valves in a sequence.

At the DCS, MIST ELIMINATOR WASH is equipped with the following controls:

MIST ELIMINATOR MANUAL WASH: Initiates Mist Eliminator Wash sequence.

MIST ELIMINATOR WASH ABORT: Terminates current Mist Eliminator Wash sequence.






JBR MIST ELIMINATOR WASH cycles 10 Upper Mist Eliminator and 10 Lower Mist Eliminator wash valves open and close in a sequence

The sequence is scheduled to start every eight hours beginning at 0001

Each valve is opened in sequence every 20 minutes for 90 seconds. The cycle begins with Lower Mist Eliminator valves followed by Upper Mist Elimininator valves providing permissives are met

If permissives are not met, wash sequence is prevented with the exception of the last wash of the day (e.g. 1600)

Washes are carried out automatically when JBR WASH CONTROL MASTER is active

MIST ELIMINATOR WASH sequence logic

Permissives



JBR Density Low X


Wash Initiated and set

1200 second timer

90 second pulse

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5441) status AUTO

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5441) command OPEN

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5441) feedback OPEN


JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5441) command OPEN removed






JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5441) feedback CLOSE


90 second pulse

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5442) status AUTO

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5442) command OPEN

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5442) feedback OPEN


JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5442) command OPEN removed

JBR LOWER MIST ELIMINATOR WASH VALVE (ME-XV-5442) feedback CLOSE

This sequence is repeated for all Lower then Upper Mist Eliminator Wash Valves

Mist Eliminator Washes complete and reset





3.3 Instrumentation

Range/Scale DCS I/O Drawing Tag Description

Low High Units Signal Encl. Card Slot P&ID DCS I/O

ME-PDIT-5741 Mist Eliminator

Differential Pressure

0 2.5 IN

H20 4-20mA

CS-CC-83104

310318 3 D3M20008 B3IMEP5741 SH 1

E3E30411 SH 5

SK-LIT-5021A JBR Level A1 14.2 55 IN

H20 4-20 mA

CS-CC-83104

310313 3 D3M20008 B3ISKL5021 SH 1 E3E30411 SH 4

SK-LIT-5021B JBR Level B1 14.2 55 IN

H20 4-20 mA

CS-CC-83104

310314 3 D3M20008 B3ISKL5021 SH 1 E3E30411 SH 4

SK-LIT-5021C JBR Level C1 14.2 55 IN

H20 4-20 mA

CS-CC-83104

310315 3 D3M20008 B3ISKL5021 SH 1 E3E30411 SH 5

SK-LIT-5022A JBR Level A2 0 216 IN

H20 4-20 mA

CS-CC-83104

310313 7 D3M20008 B3ISKL5022 SH 1 E3E30411 SH 4

SK-LIT-5022B JBR Level B2 0 216 IN

H20 4-20 mA

CS-CC-83104

310314 7 D3M20008 B3ISKL5022 SH 1 E3E30411 SH 4

SK-LIT-5022C JBR Level C2 0 216 IN

H20 4-20 mA

CS-CC-83104

310315 7 D3M20008 B3ISKL5022 SH 1 E3E30411 SH 5

SK-PDIT-5711A JBR Differential

Pressure A 0 30

IN H20

4-20 mA CS-CC-83104

310313 1 D3M20008 B3ISKP5711 SH 1 E3E30411 SH 4

SK-PDIT-5711B JBR Differential

Pressure B 0 30

IN H20

4-20 mA CS-CC-83104

310314 1 D3M20008 B3ISKP5711 SH 1 E3E30411 SH 4

SK-PDIT-5711C JBR Differential

Pressure C 0 30

IN H20

4-20 mA CS-CC-83104

310315 1 D3M20008 B3ISKP5711 SH 1 E3E30411 SH 5

SK-AIT-5011A JBR pH A 2 10 pH 4-20 mA CS-CC-83104

310313 2 D3M20008 B3ISKA5011 SH 1 E3E30411 SH 4

SK-AIT-5011B JBR pH B 2 10 pH 4-20 mA CS-CC-83104

310314 2 D3M20008 B3ISKA5011 SH 1 E3E30411 SH 4

SK-AIT-5011C JBR pH C 2 10 pH 4-20 mA CS-CC-83104

310315 2 D3M20008 B3ISKA5011 SH 1 E3E30411 SH 5





3.4 Control Valves And Limit Switches

DCS I/O Drawing Tag Description Function

Signal Encl. Card Slot P&ID DCS I/O

WF-XV-5020A JBR Level A Flush

Water Regulating Valve Open/Closed D3M20008

B3IWFX5020 SH 1 E3E30411 SH 2

WF-ZSO-5020A JBR Level A Flush

Water Regulating Valve Limit Switch Open

Open Limit Switch 120VAC CS-CC-83104

310304 14 D3M20008 B3IWFX5020 SH 1

E3E30411 SH 2

WF-ZSC-5020A JBR Level A Flush

Water Regulating Valve Limit Switch Close

Closed Limit Switch 120VAC CS-CC-83104

310304 13 D3M20008 B3IWFX5020 SH 1

E3E30411 SH 2

WF-XV-5020B JBR Level B Flush


B3IWFX5020 SH 2 E3E30411 SH 3

WF-ZSO-5020B JBR Level B Flush



310305 14 D3M20008 B3IWFX5020 SH 2

E3E30411 SH 3

WF-ZSC-5020B JBR Level B Flush



310305 13 D3M20008 B3IWFX5020 SH 2

E3E30411 SH 3

WF-XV-5020C JBR Level C Flush


B3IWFX5020 SH 3 E3E30411 SH 3

WF-ZSO-5020C JBR Level C Flush



310306 14 D3M20008 B3IWFX5020 SH 3

E3E30411 SH 3

WF-ZSC-5020C JBR Level C Flush



310306 13 D3M20008 B3IWFX5020 SH 3

E3E30411 SH 3







Signal Encl. Block Terminal P&ID DCS I/O

SK-FV-5030 JBR Flow

Regulating Valve D3M20009

B3ISKF5030 Sh 1 E3E30410 SH 5

SK-ZT-5030 JBR Flow

Regulating Valve Position

0 100 % 4-20 mA CS-CC-83102

310038 3 D3M20009 B3ISKF5030 Sh 2 E3E30410 SH 9

SK-FE-5030 JBR Level Make-Up Flow Element

D3M20009 B3ISKF5030 Sh 1 E3E30410 SH 5

SK-FIT-5030 JBR Level Make-

Up Flow 0 3000 gpm 4-20 mA

CS-CC-83101

310018 7 D3M20009 B3ISKF5030 Sh 1 E3E30410 SH 5

ME-XV-5441

Mist Eliminator Lower System

Header 1 Wash Isolation Valve

Fail Closed D3M20011 B3IMEX5441 SH 1

E3E30411 SH 2

ME-ZSO-5441



Limit Switch Open


310304 2 D3M20011 B3IMEX5441 SH 1

E3E30411 SH 2

ME-ZSC-5441



Limit Switch Close


310304 1 D3M20011 B3IMEX5441 SH 1

E3E30411 SH 2








ME-XV-5442




E3E30411 SH 3

ME-ZSO-5442



Limit Switch Open


310305 2 D3M20011 B3IMEX5442 SH 1

E3E30411 SH 3

ME-ZSC-5442



Limit Switch Close


310305 1 D3M20011 B3IMEX5442 SH 1

E3E30411 SH 3

ME-XV-5443




E3E30411 SH 3

ME-ZSO-5443



Limit Switch Open


310306 2 D3M20011 B3IMEX5443 SH 1

E3E30411 SH 3

ME-ZSC-5443



Limit Switch Close


310306 1 D3M20011 B3IMEX5443 SH 1

E3E30411 SH 3








ME-XV-5444




E3E30411 SH 2

ME-ZSO-5444



Limit Switch Open


310304 4 D3M20011 B3IMEX5444 SH 1

E3E30411 SH 2

ME-ZSC-5444



Limit Switch Close


310304 3 D3M20011 B3IMEX5444 SH 1

E3E30411 SH 2

ME-XV-5445




E3E30411 SH 3

ME-ZSO-5445



Limit Switch Open


310305 4 D3M20011 B3IMEX5445 SH 1

E3E30411 SH 3

ME-ZSC-5445



Limit Switch Close


310305 3 D3M20011 B3IMEX5445 SH 1

E3E30411 SH 3








ME-XV-5446




E3E30411 SH 3

ME-ZSO-5446



Limit Switch Open


310306 4 D3M20011 B3IMEX5446 SH 1

E3E30411 SH 3

ME-ZSC-5446



Limit Switch Close


310306 3 D3M20011 B3IMEX5446 SH 1

E3E30411 SH 3

ME-XV-5447




E3E30411 SH 2

ME-ZSO-5447



Limit Switch Open


310304 6 D3M20011 B3IMEX5447 SH 1

E3E30411 SH 2

ME-ZSC-5447



Limit Switch Close


310304 5 D3M20011 B3IMEX5447 SH 1

E3E30411 SH 2








ME-XV-5448



Fail Closed D3M20011 B3IMEX5448 SH 1 E3E30411 SH 2/3

ME-ZSO-5448



Limit Switch Open


310305 6 D3M20011 B3IMEX5448 SH 1

E3E30411 SH 3

ME-ZSC-5448



Limit Switch Close


310305 5 D3M20011 B3IMEX5448 SH 1

E3E30411 SH 3

ME-XV-5449




E3E30411 SH 3

ME-ZSO-5449



Limit Switch Open


310306 6 D3M20011 B3IMEX5449 SH 1

E3E30411 SH 3

ME-ZSC-5449



Limit Switch Close


310306 5 D3M20011 B3IMEX5449 SH 1

E3E30411 SH 3








ME-XV-5451




E3E30411 SH 2

ME-ZSO-5451

Mist Eliminator Upper System


Limit Switch Open


310304 8 D3M20012 B3IMEX5451 SH 1

E3E30411 SH 2

ME-ZSC-5451



Limit Switch Close


310304 7 D3M20012 B3IMEX5451 SH 1

E3E30411 SH 2

ME-XV-5452




E3E30411 SH 2

ME-ZSO-5452



Limit Switch Open


310305 8 D3M20012 B3IMEX5452 SH 1

E3E30411 SH 3

ME-ZSC-5452



Limit Switch Close


310305 7 D3M20012 B3IMEX5452 SH 1

E3E30411 SH 3








ME-XV-5453




E3E30411 SH 3

ME-ZSO-5453



Limit Switch Open


310306 8 D3M20012 B3IMEX5453 SH 1

E3E30411 SH 3

ME-ZSC-5453



Limit Switch Close


310306 7 D3M20012 B3IMEX5453 SH 1

E3E30411 SH 3

ME-XV-5454


Header 13Wash Isolation Valve


E3E30411 SH 2

ME-ZSO-5454



Limit Switch Open


310304 10 D3M20012 B3IMEX5454 SH 1

E3E30411 SH 2

ME-ZSC-5454



Limit Switch Close


310304 9 D3M20012 B3IMEX5454 SH 1

E3E30411 SH 2








ME-XV-5455




E3E30411 SH 3

ME-ZSO-5455



Limit Switch Open


310305 10 D3M20012 B3IMEX5455 SH 1

E3E30411 SH 3

ME-ZSC-5455



Limit Switch Close


310305 9 D3M20012 B3IMEX5455 SH 1

E3E30411 SH 3

ME-XV-5456




E3E30411 SH 3

ME-ZSO-5456



Limit Switch Open


310306 10 D3M20012 B3IMEX5456 SH 1

E3E30411 SH 3

ME-ZSC-5456



Limit Switch Close


310306 9 D3M20012 B3IMEX5456 SH 1

E3E30411 SH 3








ME-XV-5457




E3E30411 SH 2

ME-ZSO-5457



Limit Switch Open


310304 12 D3M20012 B3IMEX5457 SH 1

E3E30411 SH 2

ME-ZSC-5457



Limit Switch Close


310304 11 D3M20012 B3IMEX5457 SH 1

E3E30411 SH 2

ME-XV-5458




E3E30411 SH 3

ME-ZSO-5458



Limit Switch Open


310305 12 D3M20012 B3IMEX5458 SH 1

E3E30411 SH 3

ME-ZSC-5458



Limit Switch Close


310305 11 D3M20012 B3IMEX5458 SH 1

E3E30411 SH 3








ME-XV-5459



Fail Closed D3M20012 B3IMEX5459

E3E30411 SH 3

ME-ZSO-5459



Limit Switch Open


310306 12 D3M20012 B3IMEX5459

E3E30411 SH 3

ME-ZSC-5459



Limit Switch Close


310306 11 D3M20012 B3IMEX5459

E3E30411 SH 3

MU-XV-5421 Gas Riser Wash

Valve Fail Closed D3M20010

B3IMUX5421 SH 1 E3E30410 SH 7

MU-ZSC-5421 Gas Riser Wash

Valve Limit Switch Close


310025 13 D3M20010 B3IMUX5421 SH 1

E3E30410 SH 7

MU-ZSO-5421 Gas Riser Wash

Valve Limit Switch Open


310025 14 D3M20010 B3IMUX5421 SH 1

E3E30410 SH 7

ME-XV-5431 JBR Wall Wash

Valve Fail Closed D3M20010

B3IMUX5431 SH 1 E3E30410 SH 7

MU-ZSC-5431 JBR Wall Wash

Valve Limit Switch Close


310026 5 D3M20010 B3IMUX5431 SH 1

E3E30410 SH 7

MU-ZSO-5431 JBR Wall Wash

Valve Limit Switch Open


310026 6 D3M20010 B3IMUX5431 SH 1

E3E30410 SH 7





3.5 DCS Control Valve Commands



WF-XVO-5020A JBR Level A Flush Water Regulating

Valve

OPEN (Command)

120VAC CS-CC-83104

310301 7 D3M20008 B3IWFX5020 SH 1

E3E30411 SH 2

WF-XVO-5020B JBR Level B Flush Water Regulating

Valve

OPEN (Command)

120VAC CS-CC-83104

310302 7 D3M20008 B3IWFX5020 SH 2

E3E30411 SH 2

WF-XVO-5020C JBR Level C Flush Water Regulating

Valve

OPEN (Command)

120VAC CS-CC-83104

310303 7 D3M20008 B3IWFX5020 SH 3

E3E30411 SH 2

MU-XVO-5421 Gas Riser Wash

Valve OPEN

(Command) 120VAC

CS-CC-83102

310021 13 D3M20010 B3IMUX5421 SH 1

E3E30411 SH 6

ME-XVO-5431 JBR Wall Wash

Valve OPEN

(Command) 120VAC

CS-CC-83102

310022 13 D3M20010 B3IMUX5431 SH 1

E3E30411 SH 6

ME-XVO-5441



OPEN (Command)

120VAC CS-CC-83104

310301 1 D3M20011 B3IMEX5441 SH 1

E3E30411 SH 2

ME-XVO-5442



OPEN (Command)

120VAC CS-CC-83104

310302 1 D3M20011 B3IMEX5442 SH 1

E3E30411 SH 2

ME-XVO-5443



OPEN (Command)

120VAC CS-CC-83104

310303 1 D3M20011 B3IMEX5443 SH 1

E3E30411 SH 2

ME-XVO-5444



OPEN (Command)

120VAC CS-CC-83104

310301 2 D3M20011 B3IMEX5444 SH 1

E3E30411 SH 2








ME-XVO-5445



OPEN (Command)

120VAC CS-CC-83104

310302 2 D3M20011 B3IMEX5445 SH 1

E3E30411 SH 2

ME-XVO-5446



OPEN (Command)

120VAC CS-CC-83104

310303 2 D3M20011 B3IMEX5446 SH 1

E3E30411 SH 2

ME-XVO-5447



OPEN (Command)

120VAC CS-CC-83104

310301 3 D3M20011 B3IMEX5447 SH 1

E3E30411 SH 2

ME-XVO-5448



OPEN (Command)

120VAC CS-CC-83104

310302 3 D3M20011 B3IMEX5448 SH 1

E3E30411 SH 2

ME-XVO-5449



OPEN (Command)

120VAC CS-CC-83104

310303 3 D3M20011 B3IMEX5449 SH 1

E3E30411 SH 2

ME-XVO-5451



OPEN (Command)

120VAC CS-CC-83104

310301 4 D3M20012 B3IMEX5451 SH 1

E3E30411 SH 2

ME-XVO-5452



OPEN (Command)

120VAC CS-CC-83104

310302 4 D3M20012 B3IMEX5452 SH 1

E3E30411 SH 2








ME-XVO-5453



OPEN (Command)

120VAC CS-CC-83104

310303 4 D3M20012 B3IMEX5453 SH 1

E3E30411 SH 2

ME-XVO-5454



OPEN (Command)

120VAC CS-CC-83104

310301 5 D3M20012 B3IMEX5454 SH 1

E3E30411 SH 2

ME-XVO-5455



OPEN (Command)

120VAC CS-CC-83104

310302 5 D3M20012 B3IMEX5455 SH 1

E3E30411 SH 2

ME-XVO-5456



OPEN (Command)

120VAC CS-CC-83104

310303 5 D3M20012 B3IMEX5456 SH 1

E3E30411 SH 2

ME-XVO-5457



OPEN (Command)

120VAC CS-CC-83104

310301 6 D3M20012 B3IMEX5457 SH 1

E3E30411 SH 2

ME-XV-5458



OPEN (Command)

120VAC CS-CC-83104

310302 6 D3M20012 B3IMEX5458 SH 1

E3E30411 SH 2

ME-XV-5459



OPEN (Command)

120VAC CS-CC-83104

310303 6 D3M20012 B3IMEX5459

E3E30411 SH 2





3.6 Control Valve Power Supply

Power Panel Tag

Panel Breaker Encl. Block Terminal Loop Sheet

WF-XV-5020A EC-PBQA-7701 17 CS-CC-83104

310301 7 B3IWFX5020 SH 1

WF-XV-5020B EC-PBQA-7701 18 CS-CC-83104

310302 7 B3IWFX5020 SH 2

WF-XV-5020C EC-PBQA-7701 18 CS-CC-83104

310303 7 B3IWFX5020 SH 3

MU-XV-5421 EC-PBQA-7701 16 CS-CC-83102

310021 13 B3IMUX5421

MU-XV-5431 EC-PBQA-7701 16 CS-CC-83102

310022 13 B3IMUX5431

ME-XV-5441 EC-PBQA-7701 17 CS-CC-83104

310301 1 B3IMEX5441

ME-XV-5442 EC-PBQA-7701 17 CS-CC-83104

310302 1 B3IMEX5442

ME-XV-5443 EC-PBQA-7701 18 CS-CC-83104

310303 1 B3IMEX5443

ME-XV-5444 EC-PBQA-7701 17 CS-CC-83104

310301 2 B3IMEX5444

ME-XV-5445 EC-PBQA-7701 17 CS-CC-83104

310302 2 B3IMEX5445

ME-XV-5446 EC-PBQA-7701 18 CS-CC-83104

310303 2 B3IMEX5446

ME-XV-5447 EC-PBQA-7701 17 CS-CC-83104

310301 3 B3IMEX5447

ME-XV-5448 EC-PBQA-7701 17 CS-CC-83104

310302 3 B3IMEX5448

ME-XV-5449 EC-PBQA-7701 18 CS-CC-83104

310303 3 B3IMEX5449





3.6 Control Valve Power Supply

Power Panel Tag

Panel Breaker Encl. Block Terminal Loop Sheet

ME-XV-5451 EC-PBQA-7701 17 CS-CC-83104

310301 4 B3IMEX5451

ME-XV-5452 EC-PBQA-7701 17 CS-CC-83104

310302 4 B3IMEX5452

ME-XV-5453 EC-PBQA-7701 18 CS-CC-83104

310303 4 B3IMEX5453

ME-XV-5454 EC-PBQA-7701 17 CS-CC-83104

310301 5 B3IMEX5454

ME-XV-5455 EC-PBQA-7701 18 CS-CC-83104

310302 5 B3IMEX5455

ME-XV-5456 EC-PBQA-7701 18 CS-CC-83104

310303 5 B3IMEX5456

ME-XV-5457 EC-PBQA-7701 17 CS-CC-83104

310301 6 B3IMEX5457

ME-XV-5458 EC-PBQA-7701 18 CS-CC-83104

310302 6 B3IMEX5458

ME-XV-5459 EC-PBQA-7701 18 CS-CC-83104

310303 6 B3IMEX5459





3.7 Start Permissives

Mist Eliminators



JBR Density Low X

JBR Shell and Gas Riser Wash



JBR Density Low X





3.8 Setpoint and Alarm Limits

Tag Description Setpoint Low-Low Low High High-High

SK-AAHH-5011 JBR pH (diverter damper in online

position) 5.5 X

SK-AAHH-5011 JBR pH (diverter damper in bypass

position) 10.0 X

SK-AALL-5011 JBR pH (diverter damper in online

position) 4.5 pH X

SK-AALL-5011 JBR pH (diverter damper in bypass

position) 0.0 pH X

SK-LAH-5021 Narrow Range Level 18 Feet X

SK-LAHH-5021 Narrow Range Level X

SK-LAL-5021 Narrow Range Level 15 Feet X

SK-LALL-5021 Narrow Range Level X

SK-LAH-5022 Wide Range Level 19 Feet X

SK-LAHH-5022 Wide Range Level X

SK-LAL-5022 Wide Range Level 9.8 Feet X

SK-LALL-5022 Wide Range Level 8.8 Feet X

SK-PDAL-5711 JBR Differential

Pressure X

SK-PDAH-5711 JBR Differential

Pressure X

SK-PDAHH-5711 JBR Differential

Pressure X

ME-PDIT-5741 Mist Eliminator

Differential Pressure X





3.9 Alarm Response

TAG DESCRIPTION DCS

ACTION OPERATOR

ACTION

ME-PDAH-5741 Mist Eliminator

Differential Pressure High

Alarm Investagate cause of alarm

SK-AAHH-5011 JBR pH (diverter damper in online

position) High High Alarm

Lower vessel pH. Investagate cause of alarm

SK-AAHH-5011 JBR pH (diverter damper in bypass position) High High

Alarm Lower vessel pH.

Investagate cause of alarm

SK-AALL-5011 JBR pH (diverter damper in online

position) Low LOw Alarm

Increase vessel pH. Investagate cause of alarm

SK-AALL-5011 JBR pH (diverter damper in bypass position) Low Low

Alarm Increase vessel pH.


SK-LAH-5021 Narrow Range Level

High Shutdown Washes and Interlocks

Limestone Slurry Feed pumps Investagate cause of alarm

SK-LAHH-5021 Narrow Range Level

High High Alarm Investagate cause of alarm

SK-LAL-5021 Narrow Range Level

Low Alarm Investagate cause of alarm

SK-LALL-5021 Narrow Range Level

Low Low Investagate cause of alarm Investagate cause of alarm

SK-LAH-5022 Wide Range Level

High Alarm Investagate cause of alarm

SK-LAHH-5022 Wide Range Level

High High Interlocks Gypsum Drawoff Pumps

Interlocks Gas Cooling Pumps Investagate cause of alarm

SK-LAL-5022 Wide Range Level

Low Alarm Investagate cause of alarm

SK-LALL-5022 Wide Range Level

Low Low

Interlocks JBR Mixers OFF Interlocks Gypsum Drawoff Pumps OFF

Interlocks Gas Cooling Pumps OFF Interlocks Gypsum Transfer Pumps OFF


SK-PDAL-5711 JBR Differential

Pressure Investagate cause of alarm Investagate cause of alarm

SK-PDAH-5711 JBR Differential


SK-PDAHH-5711 JBR Differential






4 DCS Tag-Out Process Logic

The following subsections contain narrative interpretations of the DCS Tag-out process.

Click Tag-out on the DCS Screen and select applicable area for the task you will perform:

Red Hold Tag.

Blue Functional Tag.

White Information Tag.






To create a DCS Red Hold Tag follow the applicable directions listed below:

Enter clearance number in the clearance number box

Click ADD to add the number to the clearance list

Click YES to confirm.

Click EXIT to return to the Tag-out Menu.






To remove a DCS Red Hold Tag follow the applicable directions listed below:

Select Hold Tag number to remove.

Click REMOVE.








To create a Blue Functional Tag follow the applicable directions listed below:

Enter the clearance number in the clearance number box.

Click ADD.







Enter the name of the person requesting the controlled release for maintenance or testing.

Click ADD.








To remove a Blue Functional Tag follow the applicable directions listed below:

Select Blue Functional Tag number to remove.

Click REMOVE.








To create a White Information Tag follow the applicable directions listed below:

Enter any additional operating information.

Click ADD.








To remove a White Information Tag follow the applicable directions listed below:

Select the information to be removed.

Click REMOVE.







5 DCS Control Screens

The following subsections contain DCS control screens relative to the JBR Vessel System.

5.1 Scrubber Jet Bubbling Reactor Level – D3M20008 Screen





5.2 Scrubber Jet Bubbling Reactor Wash – D3M20010, 11, 12 Screen

Procedure Revision Summary

Revision Document Change:

A

Initial draft of document.

B

Incorporated comments due to plant review.

C

Corrected terminal card numbers on instrumentation table.

D Updated to incorporate latest changes in JBR Level Flushing Logic 3/12/09

NOTE: See Revision Bars for specific changes within document.

PLANT BOWEN UNIT 3 FLUE GAS DESULFURIZATION …€¦ · 3.5 DCS Control Valve Commands 71 3.6...

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Transcript of PLANT BOWEN UNIT 3 FLUE GAS DESULFURIZATION …€¦ · 3.5 DCS Control Valve Commands 71 3.6...