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BWN-3-02603.751 Rev 0 Process Description Plant Bowen

Date Printed 2/22/2011 of 43

/s/ Gary Smith Approved Plant Review Board /s/ Tim Crump Approved Operations Manager /s/ Tim Banks Approved Plant Manager Date: 05/20/2010

PLANT BOWEN UNIT 3 FLUE GAS DESULFURIZATION SYSTEM

GAS COOLING PUMPS SYSTEM PROCESS DESCRIPTION Document No. 2603.751

NOTE: If you are working with a printed copy of this document, it is NOT a Controlled Copy.

Please be sure to check online for the most recent revision.

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T able of C ontents

2603.751 PROCESS DESCRIPTION 3

2603.751.1 Safety Considerations 3

2603.751.2 Process Flow Description 4

2603.751.3 Process Description 5

2603.751.3.1 Introduction 5

2603.751.3.2 System Components 7

2603.751.3.2.1 Suction Strainers 7

2603.751.3.2.2 Inlet Control Valves 10

2603.751.3.2.3 Outlet Control Valves 13

2603.751.3.2.4 Header Control Valves 15

2603.751.3.2.5 Pumps 17

2603.751.3.2.6 Hydraulic Power Units 20

2603.751.3.2.7 Gas Cooling Spray Header Spray Nozzles 24

2603.751.3.3 Summarized Controls Description 25 2603.751.3.4 Detailed Controls Description 26

2603.751.4 Process Flow Description 32 2603.751.5 Drawing References 37

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2603.751 P R OC E S S DE S C R IP TION 2603.751.1 S afety C ons iderations

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 high temperature piping systems.

6. Personnel must be aware that components of this system are maintained in an automatic mode of operation. Note: Equipment may start at any time without warning.

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

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

9. 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.

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

11. 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.

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2603.751.2 P roc es s F low Des cription

The following subsections contain function and description of major components within this system. This procedure contains summarized and detailed controls descriptions of this system. This procedure contains a step by step process flow description of this system.

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2603.751.3 P roc es s Des c ription 2603.751.3.1 Introduc tion

The Gas Cooling System cools incoming flue gas to protect the JBR sparger tubes, the scrubber vessel system component that is most vulnerable to gas temperature. The sparger tubes temperature limit of 155oF is the lowest of all other plastic components of the gas cooling duct and JBR.

The gas cooling duct prepares the flue gas stream for entry into the JBR. The pre-quench and gas cooling sprays quench the incoming hot flue gas. The spray system consists of three banks of spray nozzle headers. The first bank is the pre-quench and it sprays water sourced from the Make-Up Water System into the flue gas stream. The last two banks spray gypsum slurry provided by the gas cooling pumps.

Two of the three gas cooling pumps are to operate at all times the JBR is receiving flue gas. They provide slurry to the last two gas cooling duct spray banks at design flow. This flow rate is not throttled. Failure of an active gas cooling pump automatically initiates the start of the stand-by pump. A loss of all gas cooling pumps results in an emergency pre-quench event and maximum pre-quench spray flow.

The first line of defense against a thermal excursion of the incoming flue gas and possible damage to the sparger tubes are two banks of gas cooling sprays. The sprays have a flow of 55,000 GPM, far more than necessary to quench the highest expected flue gas temperature of 500oF. A possibility of such an exceedance in temperature would be the result of one of the unit air heaters failing. If a heater were to fail, a unit trip would occur limiting chances of the flue gas to ever reach these temperatures. However, it does provide a conservative design point for emergency actions so the more probable but less severe cases are addressed with certainty.

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2603.751.3.1 Introduc tion

The operator is given a high inlet gas cooling duct alarm at 400oF. The pumps are designed with multiple mechanical and electrical redundancies (e.g. all 3 pumps on separate electrical supplies). Should the gas cooling pumps fail, the operator is given an alarm via the DCS. This failure would most likely result in a high-high JBR gas temperature alarm (>155oF). This alarm alerts the operator to the condition, initiates a second line of defense, and starts a 5 minute timer that provides the operator with an alarm every minute until the temperature drops below 150oF for 1 minute.

The second line of defense is the pre-quench sprays. These sprays normally have a flow rate roughly equal to the evaporation loss of the JBR. This quantity is not sufficient to fully quench the flue gas. The intent of the pre-quench spray is to minimize scale due to the drying of slurry solids. Therefore, upon a high-high JBR gas temperature alarm the two pre-quench flow control valves are moved to their 100% open positions. As a simultaneous action, the emergency pre-quench valve is opened. This provides the pre-quench sprays with high pressure fire protection water resulting in a spray flow rate of 2-2.5 times that of the evaporation loss and should be sufficient to cool the gas temperature to less than 140oF. This is a logic latch that remains in place until reset by the operator. The emergency pre-quench valve closes after 30 minutes unless the operator selects manual open. The operator is given an alarm of emergency cooling quench. The EPQ valve will alarm every 5 minutes as long as it is open.

A third line of defense is operator action. In response to any of the previous named alarms the operator may take action to correct the gas cooling pump failure. The recovery of a single gas cooling pump reduces the gas temperature below 140oF.

The final line of defense is that if the high-high temperature alarm is not satisfied within 5 minutes then a unit master fuel trip is initiated.

Control of the gas cooling spray is primarily concerned with the operation of the gas cooling pumps. The gas cooling pumps provide gypsum slurry from the JBR to the gas cooling duct spray nozzles and the JBR deck wash nozzles. All slurry pumps are designed for hard rock mining services, horizontal, fully lined, ductile iron, and slow rotating speed. Each pump is equipped with a suction side strainer. The strainers are installed in the suction pipelines of the gas cooling pumps to capture material that otherwise could plug the gas cooling spray nozzles. The strainers are of a Chiyoda/Southern Company design and are physically identical units. These strainer vessels are designed for 50 psig of internal pressure.

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2603.751.3.2 S ys tem C omponents

The Gas Cooling System consists of Suction Strainers, Pumps, Hydraulic Power Units, Inlet Control Valves, Outlet Control Valves, Header Isolation Valves, and Gas Cooling Spray Header Spray Nozzles.

2603.751.3.2.1 S uc tion S trainers

Number Sheet Rev Title P&IDs

• D3M20003 1 1 JBR Gas Cooling Pumps

• D3M20006 1 3 P&ID - Gas Cooling Pumps

• D3M20007 1 2 P&ID - Gas Cooling Spray

• D3M20066 1 1 P&ID - Gas Cooling System – JBR Internal Piping Vendor O&M Manuals

• S85360 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Elevation & Plan

• S85361 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Basket Assembly & Flush Process

• S93625 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Nozzle Size / Thickness Chart

Function The Gas Cooling Pump Suction Strainers are installed in the suction lines of the gas cooling pumps to capture material that otherwise could plug the gas cooling spray nozzles.

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Description The Gas Cooling Pump Suction Strainers are of a Chiyoda and Southern Company design. Each strainer has a pipeline size of 42”, a 10” drain, three 3” instrument connection docks and three 3” flush connections. The strainers are designed for 50 psig of internal pressure and are rated at 30,041 gpm with a filter passage size of ¾” square.

Quantity 3, one per gas cooling pump

Flow Rate 30,041 gpm

Type In-line Basket

Filter Passage Size ¾” square, 19 mm

Pipeline Size 42”

Illustrations of Gas Cooling Pump Strainer

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2603.751.3.2.2 Inlet C ontrol V alves





• D3M20066 1 1 P&ID - Gas Cooling System – JBR Internal Piping

Vendor Drawings

• TP205086 1 C EVS 2 Terminal Point Layout 2 Valve Control no PLC – DCS Controlled Logic

• S83320 1 A Hydraulic Schematic, EVS Actuator 2 Valve Control Vendor O&M Manuals

• S92416 1 0 Scrubber - FGD - Slurry Valve, Installation, Maintenance and Operating Instructions

Function The Gas Cooling Pump Inlet Valves control slurry flow to the Gas Cooling Pump Inlet Strainer. Description The Gas Cooling System is equipped with three 42” Clarkson model #KGA42-HC-B6B10B11L2L4L6M10Q2 Heavy Duty Knife Gate valves rated for operating pressures up to 75 psi and temperatures up to 400°F. The valves are flat-face flanged, packing less, rubberlined bi-directional valves. A full port design has no internal obstructions and provides a “blind flange” shut-off when the valves are closed. The sealing surface is between two elastomeric sleeves compressed into ductile iron valve housings. The sleeves are molded with an integral stiffener ring that locates the sleeve in the valve housing and helps the sleeves resist the high shearing forces present when the gate is driven between them. Mild steel body spacers separate the body housing halves and serve as an external guide to the valve’s knife-edge stainless steel gate. The stainless steel gate is completely withdrawn from the process flow when in the open position and can be inspected or replaced without taking the valve out of service. When the valve is in the closed position, the downstream sleeve can be replaced while the upstream portion is still holding pressure.

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Each valve is equipped with an RDC Control model HM hydraulic actuator. The actuator has an 8” bore and 46” stroke with a minimum supply pressure of 1800 psi and maximum of 3000 psi. Actuation of the valve slides a stainless steel gate between the sleeves to shut off flow. The sleeves seal against the gate when the valve is closed and seal against each other when the valve is open. As the gate moves from open to closed position, it separates the facing sleeves. A stiffener ring molded into the elastomer retains the shape of the sleeves during opening and closing cycles. The sleeve assembly provides positive sealing action when the valve gate is closed. When the gate is open, the sleeves provide an unobstructed port and protect metal parts from the flowing slurry. Two proximity switches provide valve open and close indication to the DCS. Each valve is equipped with a hardened lockout pin on the valve frame and energy lockout devices on the hydraulic actuator. The lockout pin is not designed to take the full load of the actuator and should be used with the hydraulic energy lockouts.

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2603.751.3.2.3 Outlet C ontrol V alves






Vendor Drawings




Function The Gas Cooling Pump Outlet Valves isolate Gas Cooling Spray Headers A and B from the respective pump discharge. Description The Gas Cooling System is equipped with three 36” Clarkson model #KGA36-HC-B6B10B11L2L4L6M10Q2 Heavy Duty Knife Gate valves rated for operating pressures up to 75 psi and temperatures up to 400°F. The valves are flat-face flanged, packing less, rubberlined bi-directional valves. A full port design has no internal obstructions and provides a “blind flange” shut-off when the valves are closed. The sealing surface is between two elastomeric sleeves compressed into ductile iron valve housings. The sleeves are molded with an integral stiffener ring that locates the sleeve in the valve housing and helps the sleeves resist the high shearing forces present when the gate is driven between them. Mild steel body spacers separate the body housing halves and serve as an external guide to the valve’s knife-edge stainless steel gate. The stainless steel gate is completely withdrawn from the process flow when in the open position and can be inspected or replaced without taking the valve out of service. When the valve is in the closed position, the downstream sleeve can be replaced while the upstream portion is still holding pressure.

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2603.751.3.2.3 Outlet C ontrol V alves

Each valve is equipped with an RDC Control model HM hydraulic actuator. The actuator has a 6” bore and 39” stroke with a minimum supply pressure of 1800 psi and maximum of 3000 psi. Actuation of the valve slides a stainless steel gate between the sleeves to shut off flow. The sleeves seal against the gate when the valve is closed and seal against each other when the valve is open. As the gate moves from open to closed position, it separates the facing sleeves. A stiffener ring molded into the elastomer retains the shape of the sleeves during opening and closing cycles. The sleeve assembly provides positive sealing action when the valve gate is closed. When the gate is open, the sleeves provide an unobstructed port and protect metal parts from the flowing slurry. Two proximity switches provide valve open and close indication to the DCS. Each valve is equipped with a hardened lockout pin on the valve frame and energy lockout devices on the hydraulic actuator. The lockout pin is not designed to take the full load of the actuator and should be used with the hydraulic energy lockouts.

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2603.751.3.2.4 Header C ontrol Valves






Vendor Drawings




Function The Gas Cooling Spray Header Isolation Valves isolate the respective header from all three Gas Cooling Pumps. Description Each Gas Cooling Spray Header is equipped with a 36” Clarkson model #KGA36-HC-B6B10B11L2L4L6M10Q2 Heavy Duty Knife Gate valve rated for operating pressures up to 75 psi and temperatures up to 400°F. The valves are flat-face flanged, packing less, rubber lined bi-directional valves. A full port design has no internal obstructions and provides a “blind flange” shut-off when the valves are closed. The sealing surface is between two elastomeric sleeves compressed into ductile iron valve housings. The sleeves are molded with an integral stiffener ring that locates the sleeve in the valve housing and helps the sleeves resist the high shearing forces present when the gate is driven between them. Mild steel body spacers separate the body housing halves and serve as an external guide to the valve’s knife-edge stainless steel gate. The stainless steel gate is completely withdrawn from the process flow when in the open position and can be inspected or replaced without taking the valve out of service. When the valve is in the closed position, the downstream sleeve can be replaced while the upstream portion is still holding pressure.

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2603.751.3.2.4 Header C ontrol Valves

Each valve is equipped with an RDC Control model HM hydraulic actuator. The actuator has a 6” bore and 39” stroke with a minimum supply pressure of 1800 psi and maximum of 3000 psi. Actuation of the valve slides a stainless steel gate between the sleeves to shut off flow. The sleeves seal against the gate when the valve is closed and seal against each other when the valve is open. As the gate moves from open to closed position, it separates the facing sleeves. A stiffener ring molded into the elastomer retains the shape of the sleeves during opening and closing cycles. The sleeve assembly provides positive sealing action when the valve gate is closed. When the gate is open, the sleeves provide an unobstructed port and protect metal parts from the flowing slurry. Two proximity switches provide valve open and close indication to the DCS. Each valve is equipped with a hardened lockout pin on the valve frame and energy lockout devices on the hydraulic actuator. The lockout pin is not designed to take the full load of the actuator and should be used with the hydraulic energy lockouts.

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2603.751.3.2.5 P umps




Vendor Drawings • S82370 6 B Unit 3 FGD Project Vibration System Cabinet Vendor O&M Manuals

• S85165 1 0 Scrubber - Flue Gas Desulphurization-Expansion Joints-Installation and Maintenance Manual

• S90838 1 0 Scrubber-FGD- Bearing Installation & Maintenance Guide

• S91389 1 0 Scrubber-Flue Gas Desulphurization-Installation, Operation & Maintenance Manual -Gas Cooling Pumps

• S81759 1 A Scrubber - FGD- RTD for Gas Cooling Pump

• S90840 1 0 Scrubber - FGD-Gear Drives & Opening Gearing, Corrosion Protection

• S90842 1 0 Scrubber - FGD- Enclosed Gear Drives Installation and Maintenance Instructions

• S90846 1 0 Scrubber - FGD - Ultramax Gear Drives, Disassembly & Assembly Instructions

• S90848 1 0 Scrubber-FGD-Steelflez Couplings-Installation & Maintenance

• S90850 1 0 Scrubber-FGD-Gear Couplings, Installation & Maintenance

• S90851 1 0 Scrubber-FGD-Single Helical, Herringbone & Spur Gears, Installation & Maintenance

• S90852 1 0 Scrubber-FGD-Ring Gear Installation Maintenance

• S90854 1 0 Scrubber-FGD-Ultramax Gear Drives, Installation & Maintenance

Function The Gas Cooling Pumps provide gypsum slurry from the JBR to the gas cooling duct spray nozzles and the JBR deck wash nozzles.

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2603.751.3.2.5 P umps

Description The Gas Cooling System is equipped with three pump assemblies consisting of the following three major components: Pump Warman model #550TUL RRQM centrifugal slurry pump with a flow rating of 30,041gpm. Designed for hard rock mining services, the pump casings are constructed of ductile iron and lined with natural rubber, the impeller is of high chrome steel alloy and the shaft is of 1045 steel with a high chrome alloy sleeve.

Quantity 3, two operating + one spare, per JBR Flow Rate 30,041 gpm Head 92 ft of H2O Brake Horsepower 940 hp Manufacturer & Model Weir Slurry, 550TUL RRQM Type centrifugal, slurry Casing Ductile iron Shaft 1045 steel with high chrome alloy sleeve Impeller High chrome steel alloy Liner Natural rubber Shaft Seal mechanical seal Drive Gear reducer Pump Speed 386 rpm Motor Speed 1800 rpm Motor hp 1100 hp

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2603.751.3.2.5 P umps

Motor

Teco 4160 V frame 450C induction motor. Rated at 1000 hp and turns at 1800 rpm. The motor is totally enclosed and fan cooled and employs a cast iron construction, copper bar rotor, 100 ohm platinum stator RTD’s and 120 Volt space heater.

Reduction Gear

Falk model # 425A-1S reduction gear assembly. With the motor turning at 1800 rpm, the output of the reduction gear turns the pump at 386 rpm.

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2603.751.3.2.6 Hydraulic P ower Units





Vendor Drawings




Function The Hydraulic Power Units provide the motive force necessary to position the Gas Cooling Pump inlet and outlet valves as well as header A and B isolation valves. Description The Gas Cooling System is equipped with a total of four identical hydraulic skids; one for each of the Gas Cooling Pump inlet and discharge valve pairs and one for both Gas Cooling Header Isolation Valves. Each hydraulic skid is equipped primarily with the following: • One Baldor custom 15 hp motor powered through a variable speed drive. • One eight gallon reservoir with an air breather. • One Stauff model RTF 25S G10 B S2 V return filter assembly. • One Hydraforce model RV10-20A-0-N-33 relief valve with a 1600 psi setpoint. • Two Yuken model DSG-03-3C4-A120-N-5090 directional solenoid valves. • One Oilgear model PVWH-10-LSAY-CNSB variable displacement pump (10 gpm @

1800 rpm). • Two Yuken model MPW-03-2-20 check valve modules. • One McMaster Carr model 7079K16 reservoir over temperature switch set at

200°F. • One McMaster Carr model 46815K22 reservoir low level switch set to alarm at 3”

above pump suction. • Eight ¾” Stauff model B8V21161101M-LD full port ball isolation valves.

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The maximum and minimum flow rates for the positive displacement pump are determined by pump discharge pressure, which is directly affected by valve position. This pump is driven by a Baldor custom motor powered by a variable frequency power supply. The design maximum flow rate for the Oilgear pump is 10 gpm at 1800 rpm and 15 gpm at 2400 rpm. The minimum flow rate is 6 gpm at 1800 rpm. At a setpoint of 1100 psi discharge pressure, the Oilgear pump will switch to a low flow, high pressure mode. A McMaster Carr level switch is incorporated into the system to prevent pump damage in the event that a reservoir low level condition occurs. The low level switch is set to actuate when reservoir level reaches 3” above the pump suction. Also, a McMaster Carr temperature switch is included in the system to prevent an over temperature condition within the reservoir. This switch is set to actuate at 200oF. A Pascal Systems air breather is attached to the reservoir to prevent internal reservoir pressure fluctuations with the rise and fall of fluid level during valve actuation. A Stauff return filter assembly is located in the fluid return path to filter any contaminants and prevent damage to the pump, solenoid valves, and valve actuators.

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The hydraulic fluid is discharged from the pump to a pair of 110 VAC Yuken Soldenoid Valves. These valves will reposition based on the demand from the DCS to either open or close the Tyco Valves. A Yuken Check Valve Module is in place to prevent unintended backflow during valve operation. Eight ¾” Stauff ball valves serve to isolate the valves from the hydraulic process or the HPU skid from the valves for servicing. A Hydraforce Relief Valve is situated between the pump discharge line and the reservoir return line. This relief valve has a setpoint of 1600 psi and serves to protect system components from excessive pressure.

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The entirety of the HPU skid is enclosed in a NEMA 4x enclosure with the exception of the eight Stauff ball valves that serve to isolate the skid and Tyco valves for servicing.

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2603.751.3.2.7 G as C ooling S pray Header S pray Nozzles





• D3M20066 1 1 P&ID - Gas Cooling System – JBR Internal Piping Function The Gas Cooling Spray Header Spray Nozzles spray gypsum slurry pumped from the JBR into the Flue Gas flow path to reduce flue gas temperature. Description The Gas Cooling Spray headers are equipped with 456 BETE model #TSC-200 A-90 Full Cone spray nozzles with a spray angle of 95 °F. The nozzles have a flow rate of 112 gpm at an operating pressure of 14.2 psid, a minimum passage diameter of 32mm and a spray angle of 95 °F. The nozzles are constructed of Nitrogen Bonded Silicon Carbide and utilize a Victaulic coupling connection.

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2603.751.3.3 S ummarized C ontrols Des c ription

During normal operation two gas cooling pumps are running with one in standby. Before starting the first two pumps, the corresponding suction valves are opened and placed in auto. The flush, drain and discharge valves are placed in auto and both cooling header spray isolation valves opened. The standby pump, suction valve, drain valve, flush valve, vent valve and discharge valve are all placed in auto. The standby pump will automatically start if an operating pump trips. When a pump is shutdown or tripped, a post flush sequence is automatically executed after a 5 minute delay. The sequence flushes the pump and suction filter with Flush Water by closing the pumps suction and discharge valves and opening flush, vent and drain valves.

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2603.751.3.4 Detailed C ontrols Des c ription

Gas Cooling Pump Start and Stop Sequence:

Gas Cooling Pump Start 1. Pump is at idle. 2. T=0 The operator or DCS initiates a pump start. 3. T=0 Suction Strainer Drain and Vent Valve Close 4. T= 0 Suction Valve is opened. 5. T= 30 seconds (to allow pump to fill), Vent Valve is closed 6. T= 35 seconds (to assure Vent Valve is closed), Pump Motor is started. 7. The discharge valve is opened. 8. The pump is now in the run mode.

Gas Cooling Pump Stop 1. Pump is running. 2. The operator or DCS initiates a pump stop. 3. The discharge valve is closed. 4. 2 second time delay , then the pump motor is stopped. 5. The suction valve is closed. 6. A five minute delay (provides opportunity for the operator to recover pump operations

in case of a pump trip). 7. The vent valve and the Suction strainer drain valve are both opened. 8. A one minute delay (assures system pressure relieved). 9. The flush valve is opened. 10. Flush and drain for 5 minutes (assures adequate flush of strainer and piping). 11. The flush valve is closed.

NOTE: The vent valve and the drain valve remain open.

12. Pump is stopped and ready for service. Step 6 in the pump stop sequence provides opportunity for the operator to recover pump operations in case of a pump trip.

In order to protect the pump, the suction valve open position limit switch must be satisfied to close the pump motor contactor.

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Also, to protect the pump, the drain valve and vent valve must be closed, to get the suction valve open command, and the suction valve must be opened for 30 seconds to get the vent valve close command. This ensures the pump casing is full before the sequencer issues the Gas Cooling Pump start command.

The following will result in automatic initiation of the GCP Stop Sequence:

• Suction Valve not in AUTO

• Discharge Valve not in AUTO

• Discharge Valve CLOSED

• Pump TRIPPED indication

• Suction Valve CLOSED

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Start permits, and alarms associated with the Gas Cooling System are the following:

Pump 3A Permissives • MCC Schweitzer motor controller alarm contact open. • MCC in MAINT contact open.

• 3A Gas Cooling Pump DCS control LOCKOUT not selected.

• 3A Gas Cooling Pump DCS control TAGOUT not selected.

• 3A Gas Cooling Pump , PUMP FAILED indication clear.

• JBR WR LEVEL LOW-LOW indication clear.

• Minimum 2 JBR mixers running.

• A Gas Cooling Header Isolation Valve open OR B Gas Cooling Header Isolation Valve open.

• 3A Gas Cooling Pump, PUMP TRIP indication clear.

• (3A Gas Cooling Pump, discharge valve AND 3A Gas Cooling Pump flush valve closed for 60 seconds) any other gas cooling pump running.

• 3A Gas Cooling Pump Suction Valve opened. Pump 3A Post Flush Logic Permissives

• 3A Gas Cooling Pump Flush Valve in auto and closed.

• 3A Gas Cooling Pump Drain Valve in auto and closed.

• 3A Gas Cooling Pump TRIPPED.

• 3A Gas Cooling Pump transfer line flush not in progress. Pump 3A Suction Valve Permissives

• Valve not designated to tagout list in DCS.

• EVS ACTUATOR FAULT contacts not closed.

• The 3A Gas Cooling Pump must be tripped offline to close this valve. Pump 3A Discharge Valve Permissives



• The 3A Gas Cooling Pump must be tripped offline to close this valve. Pump 3A Drain Valve Permissives


• The 3A Gas Cooling Pump must be tripped offline to open this valve Pump 3A Flush Valve Permissives


• The 3A Gas Cooling Pump must be tripped offline to open this valve

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Pump 3B Permissives

• MCC Schweitzer motor controller alarm contact open.

• MCC in MAINT contact open.

• 3B Gas Cooling Pump DCS control LOCKOUT not selected.

• 3B Gas Cooling Pump DCS control TAGOUT not selected.

• 3B Gas Cooling Pump , PUMP FAILED indication clear.




• 3B Gas Cooling Pump, PUMP TRIP indication clear.

• (3B Gas Cooling Pump, discharge valve AND 3B Gas Cooling Pump flush valve closed for 60 seconds) any other gas cooling pump running.

• 3B Gas Cooling Pump Suction Valve opened.

Pump 3B Post Flush Logic Permissives

• 3B Gas Cooling Pump Flush Valve in auto and closed.

• 3B Gas Cooling Pump Drain Valve in auto and closed.

• 3B Gas Cooling Pump TRIPPED.

• 3B Gas Cooling Pump transfer line flush not in progress.

Pump 3B Suction Valve Permissives



• The 3B Gas Cooling Pump must be tripped offline to close this valve.

Pump 3B Discharge Valve Permissives



• The 3B Gas Cooling Pump must be tripped offline to close this valve.

Pump 3B Drain Valve Permissives


• The 3B Gas Cooling Pump must be tripped offline to open this valve

Pump 3B Flush Valve Permissives


• The 3A Gas Cooling Pump must be tripped offline to open this valve

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Pump 3C Permissives

• MCC Schweitzer motor controller alarm contact open.

• MCC in MAINT contact open.

• 3C Gas Cooling Pump DCS control LOCKOUT not selected.

• 3C Gas Cooling Pump DCS control TAGOUT not selected.

• 3C Gas Cooling Pump , PUMP FAILED indication clear.




• 3C Gas Cooling Pump, PUMP TRIP indication clear.

• (3C Gas Cooling Pump, discharge valve AND 3C Gas Cooling Pump flush valve closed for 60 seconds) any other gas cooling pump running.

• 3C Gas Cooling Pump Suction Valve opened.

Pump 3C Post Flush Logic Permissives

• 3C Gas Cooling Pump Flush Valve in auto and closed.

• 3C Gas Cooling Pump Drain Valve in auto and closed.

• 3C Gas Cooling Pump TRIPPED.

• 3C Gas Cooling Pump transfer line flush not in progress.

Pump 3C Suction Valve Permissives



• The 3C Gas Cooling Pump must be tripped offline to close this valve.

Pump 3C Discharge Valve Permissives



• The 3C Gas Cooling Pump must be tripped offline to close this valve.

Pump 3C Drain Valve Permissives


• The 3C Gas Cooling Pump must be tripped offline to open this valve

Pump 3C Flush Valve Permissives


• The 3C Gas Cooling Pump must be tripped offline to open this valve

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T ag Des c ription S etpoint L ow-L ow L ow High High-High GC-TAH-

5600A Gas Cooling Pump

3A Temp High 195 °F

GC-TAH-5600A

Gas Cooling Pump 3A Temp High High 210 °F

GC-VAH-5600A

Gas Cooling Pump 3A Motor Vibration High 7 in/min

GC-PDAH-5608A

Gas Cooling Pump A Suction Strainer

Differential High 1

GC-PDAHH-5608A

Gas Cooling Pump A Suction Strainer

Differential High High 3 trip

Gas Cooling Pump A

Strainer Inlet Pressure

Low 2

GC-FAL-5600A

Gas Cooling Pump A Gear Box Cooling

Water Flow Low 2 gpm

GC-TAH-5600B

Gas Cooling Pump 3B Temp High 195 °F

GC-TAH-5600B

Gas Cooling Pump 3B Temp High High 210 °F

GC-VAH-5600B

Gas Cooling Pump 3B Motor Vibration High 7 in/min

GC-PDAH-5608B

Gas Cooling Pump B Suction Strainer

Differential High 1

GC-PDAHH-5608B

Gas Cooling Pump B Suction Strainer

Differential High High 3

Gas Cooling Pump B


Low 2

GC-FAL-5600B

Gas Cooling Pump B Gear Box Cooling


GC-TAH-5600C

Gas Cooling Pump 3C Temp High 195 °F

GC-TAH-5600C

Gas Cooling Pump 3C Temp High High 210 °F

GC-VAH-5600C

Gas Cooling Pump 3C Motor Vibration High 7 in/min

GC-PDAH-5608C

Gas Cooling Pump C Suction Strainer

Differential High 1

GC-PDAHH-5608C

Gas Cooling Pump C Suction Strainer

Differential High High 3

Gas Cooling Pump c


Low 2

GC-FAL-5600C

Gas Cooling Pump C Gear Box Cooling


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Process Flow

S tep 1

Gypsum slurry is drawn from JBR (SK-RX-5001) from penetrations C1, C2 and C3 through a 42” header attached to each penetration. Reference Drawing No. D3M20009, Sheet 1, Rev. 3, P&ID-Jet Bubbling Reactor JBR Piping. S tep 2

Each 42” header directs slurry through 42” electro-hydraulically actuated gate valve (GC-XV-5601A, B or C). From gate valve (GC-XV-5601 A, B or C), a 42” flex hose directs slurry to Basket Strainer GC-SN-5600A, B or C. Reference Drawing No. D3M20006, Sheet 1, Rev. 3, P&ID-Gas Cooling Pumps. S tep 3

Slurry exits the strainer through a 42” flex hose to the 26” inlet of Centrifugal Slurry Pump (GC-PU-5600 A, B or C). Reference Drawing No. D3M20006, Sheet 1, Rev. 3, P&ID-Gas Cooling Pumps. S tep 4

Slurry exits Gas Cooling Pump GC-PU-5600A, B or C through a 22” expansion joint to a 24” header. The header is increased to 36” and directs slurry through electro-hydraulically actuated gate valve (GC-XV-5602A, B or C) to a 54” common header. Reference Drawing No. D3M20006, Sheet 1, Rev. 3, P&ID-Gas Cooling Pumps. S tep 5

The 54” common header directs slurry flow to two 36” headers, Gas Cooling Spray Header A and Gas Cooling Spray Header B. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray.

S tep 6

Gas Cooling Spray Header A directs slurry through 36” electro-hydraulic actuated gate valve (GC-XV-5605) then through three 8” expansion joints and one 10” expansion joint, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 7

The 36” header is then reduced to a 30” header. The 30” header directs slurry through four 10” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray.

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2603.751.4 P roc es s F low Des cription S tep 8

The 30” header is then reduced to a 24” header. The 24” header directs slurry through three 10” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 9

The 24” header is then reduced to a 18” header. The 18” header directs slurry through two 8” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 10

The 18” header is then reduced to a 16” header. The 16” header directs slurry through two 10” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 11

The 16” header is then reduced to a 12” header. The 12” header directs slurry through one 10” expansion joint before terminating on the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 12

The 12” header is then reduced to a 10” header. The 10” header directs slurry through one 10” expansion joint before terminating on the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray.

S tep 13

Inside the Flue Gas Duct, the 8” headers direct slurry to two spray nozzles before reducing to 6” headers. The 6” headers direct slurry to three spray nozzles before reducing to 4” headers. The 4” headers direct slurry to two spray nozzles before reducing to 3” headers. The 3” headers direct slurry to one spray nozzle before terminating. The spray nozzles inject slurry into the flue gas flow path. Reference Drawing No. D3M20066, Sheet 1, Rev. 1, P&ID-Gas Cooling System- JBR Internal Piping.

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S tep 14

Inside the Flue Gas Duct, the 10” headers direct slurry to six spray nozzles before reducing to 8” headers. The 8” headers direct slurry to four spray nozzles before reducing to 6” headers. The 6” headers direct slurry to four spray nozzles before reducing to 4” headers. The 4” headers direct slurry to two spray nozzles before terminating. The spray nozzles inject slurry into the flue gas flow path. Reference Drawing No. D3M20066, Sheet 1, Rev. 1, P&ID-Gas Cooling System- JBR Internal Piping. S tep 15

Header B directs slurry through 36” electro-hydraulic actuated gate valve (GC-XV-5606) then through three 10” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 16

The 36” header is reduced to a 30” header. The 30” header directs slurry through three 10” expansion joints and two 8” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 17

The 30” header is reduced to a 24” header. The 24” header directs slurry through two 10” expansion joints and two 8” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 18

The 24” header is reduced to an 18” header. The 18” header directs slurry through two 10” expansion joints, each of these branch headers terminate at the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray.

S tep 19

The 18” header is reduced to a 14” header. The 14” header directs slurry through one 10” expansion joint before terminating on the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 20

The 14” header is reduced to a 10” header. The 10” header directs slurry through one 10” expansion joint before terminating on the outside wall of the Gas Cooling Duct. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray.

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S tep 21

Inside the Flue Gas Duct, the 8” headers direct slurry to two spray nozzles before reducing to 6” headers. The 6” headers direct slurry to three spray nozzles before reducing to 4” headers. The 4” headers direct slurry to two spray nozzles before reducing to 3” headers. The 3” headers direct slurry to one spray nozzle before terminating. The spray nozzles inject slurry into the flue gas flow path. Reference Drawing No. D3M20066, Sheet 1, Rev. 1, P&ID-Gas Cooling System- JBR Internal Piping. S tep 22

Inside the Flue Gas Duct, the 10” headers direct slurry to six spray nozzles before reducing to 8” headers. The 8” headers direct slurry to four spray nozzles before reducing to 6” headers. The 6” headers direct slurry to four spray nozzles before reducing to 4” headers. The 4” headers direct slurry to two spray nozzles before terminating. The spray nozzles inject slurry into the flue gas flow path. Reference Drawing No. D3M20066, Sheet 1, Rev. 1, P&ID-Gas Cooling System- JBR Internal Piping. S tep 23

Six 42” Gas Cooling Duct Drains located downstream of Gas Cooling Spray Headers A and B direct excess slurry out of the Flue Gas Duct through 42” expansion joints. Reference Drawing No. D3M20007, Sheet 1, Rev. 2, P&ID-Gas Cooling Spray. S tep 24

The Gas Cooling Duct Drains return the excess slurry to the JBR via 42” penetrations Z1 through Z6. Reference Drawing No. D3M20009, Sheet 1, Rev. 3, P&ID-Jet Bubbling Reactor JBR Piping.

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Gas Cooling Pump Flush

A flush sequence is initiated on a GCP Pump shutdown to flush out any slurry buildup in the slurry lines into the FGD area trench using flush water which is low in solids content. Pump flushing is accomplished in the direction of discharge to suction, during which the pump experiences a momentary reverse spin. A coast down timer ensures that the reverse rotation ceases prior to the pump motor being energized. One distinction of the gas cooling pump flush operation is that it is limited to the area between the suction and discharge isolation valves. Another feature is that the stop sequence includes a five minute delay following a pump trip to allow the operator an opportunity to recover operation of the pump. In performing a flush of a gas cooling pump, either the pump discharge, suction or drain valve must be open prior to opening the flush valve. This interlock is necessary to protect the gas cooling pump suction strainers from over pressure by the flush water system. S tep 1

At the initiation of the pump flush sequence, the 4” drain valve (GC-XV-5604A, B or C) is opened and the automatic vent valve (GC-XV-5609A, B or C) is opened, to drain the strainer, pump casing, the pump suction header, and the 24” pump discharge header. S tep 2

The pump flush valve (WR-XV-5603A, B or C) directing flush water to the 24” header downstream of Gas Cooling Pump (GC-PU-5600A, B or C), flushing the discharge header, pump casing, suction header, and the strainer with flush water. Reference Drawing No. D3M20006, Sheet 1, Rev. 3, P&ID-Gas Cooling Pumps.

S tep 3

After flushing for 300 seconds, the pump flush valve (WR-XV-5603A, B or C) closes. The 4” drain valve (GC-XV-5604A, B or C) and the automatic vent valve (GC-XV-5609A, B or C) remain open to drain the discharge header, pump casing, suction header, and the strainer to FGD Area Trench (WW-SU-5495). Reference Drawing No. D3M20006, Sheet 1, Rev. 3, P&ID-Gas Cooling Pumps.

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2603.751.5 Drawing R eferenc es

The Gas Cooling System is illustrated on the following drawings:



• D3M20005 1 0 Hot Flue Gas Pre-Quench Spray System





• D3M20009 1 3 P&ID – Jet Bubbling Reactor JBR Piping

• D3M20010 1 0 JBR Deck, JBR Shell & Gas Riser Wash

• D3M20039 1 1 JBR U3 & U4 Return Water Distribution

• D3M20041 1 3 Makeup Water Distribution

• D3M20052 1 2 P&ID Mist Eliminator Area Instrument Air


MCC Data Sheets

• E3E30118 1 7 MCC Data Sheet JBR 3/4 480V MCC A (ES-MCMA-7000 – JBR ELECT BLDG)

• E3E30119 1 4 MCC Data Sheet JBR 3/4 480V MCC B (ES-MCMB-7000 – JBR ELECT BLDG)

• E3E30123 1 1 MCC Data Sheet ID Booster Fan 480V MCC 3D (ES-MCM3D-7000 – IDBF ELECT BLDG)

• E3E30124 1 3 MCC Data Sheet ID Booster Fan 480V MCC 3E (ES-MCM3E-7000 – IDBF Elect Bldg)

• E3E30127 1 4 MCC Data Sheet JBR 3/4 480V MCC AC (ES-MCMAC-7000 – JBR ELECT BLDG)

Distribution Panels

• E3E30128 1 5 Distribution Panel JBR 3/4 Electrical Bldg 120/208V AC Panel A

• E3E30129 1 3 Distribution Panel JBR 3/4 Electrical Bldg 120/208V AC Panel B

• E3E30140 1 7 Distribution Panel JBR 3/4 Electrical Bldg 120V Critical AC Panel A and Inverter

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Number Sheet Rev Title Distribution Panels

• E3E30144 1 3 Distribution Panel JBR 3/4 Electrical Bldg 120V DC Panel A & Battery Chargers

• E3E30145 1 0 Distribution Panel JBR 3/4 Electrical Bldg 120V DC Panel B

Elementary Diagrams • E3E30193 1 3 Elementary Diagram Gas Cooling Pump 3A

• E3E30193 2 1 Elementary Diagram Gas Cooling Pump 3A

• E3E30194 1 3 Elementary Diagram Gas Cooling Pump 3B

• E3E30194 2 0 Elementary Diagram Gas Cooling Pump 3B

• E3E30195 1 4 Elementary/Wiring Diagram Gas Cooling Pump 3C

• E3E30195 2 2 Elementary/Wiring Diagram Gas Cooling Pump 3C

Single Line Diagrams • H6000 1 17 Unit 3 Main Single Line Diagram

• E3E30100 1 1 FGD Project Master Single Line Diagram

• E3E30101 1 1 FGD Project Main Single Line Diagram

DCS I/O Wiring Diagrams

• E3E30410 2 1 Wiring Diagram JBR Elect Bldg DCS I/O Cabinet 3101 Base 0





• E3E30410 7 0 Wiring Diagram JBR Elect Bldg DCS I/O Cabinet 3102Base 2



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Number Sheet Rev Title DCS I/O Wiring Diagrams


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

• E3E30460 1 0 Wiring Diagram JBR Vibration Cabinet Unit 3

Wiring/Elementary Diagrams

• E3E30311 1 0 Wiring Diagram JBR 3/4 4160V Bus A Frame 9 Front

• E3E30332 1 0 Wiring Diagram JBR 3/4 4160V Bus A Frame 9 Rear

Vendor Drawings

• S83320 1 A Flow Control Valves – Hydraulic Schematic EVS Actuator EVS-2 – 2 Valve Control

• S85360 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Elevation & Plan

• S85361 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Basket Assembly & Flush Process

• S81759 1 A Scrubber - FGD- RTD for Gas Cooling Pump

• S90840 1 0 Scrubber - FGD-Gear Drives & Opening Gearing, Corrosion Protection

• S90843 1 0 Scrubber-FGD-Horizontal-Parallel-Right Angle-Drives, Disassembly & Assembly

• S90846 1 A Scrubber - FGD - Ultramax Gear Drives, Disassembly & Assembly Instructions

• S93625 1 0 FGD - Scrubber - Gas Cooling Pump Strainer - Nozzle Size / Thickness Chart

Functional Control Diagrams • D3F01060 1 0 3A Gas Cooling Pump Functional Control Diagram

• D3F01061 1 0 3A Gas Cooling Pump Functional Control Diagram



• D3F01067 1 0 3A Gas Cooling Pump Suction Valve Functional Control Diagram

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Number Sheet Rev Title Functional Control Diagrams

• D3F01068 1 0 3A Gas Cooling Pump Discharge Valve Functional Control Diagram

• D3F01069 1 0 3A Gas Cooling Pump Drain Valve Functional Control Diagram

• D3F01070 1 0 3A Gas Cooling Pump Flush Valve Functional Control Diagram

• D3F01071 1 0 3A Gas Cooling Pump Post Flush Logic Functional Control Diagram



• D3F01072 1 0 3A Gas Cooling Valve Alarms Functional Control Diagram

• D3F01073 1 0 3B Gas Cooling Pump Functional Control Diagram




• D3F01080 1 0 3B Gas Cooling Pump Suction Valve Functional Control Diagram

• D3F01081 1 0 3B Gas Cooling Pump Discharge Valve Functional Control Diagram

• D3F01082 1 0 3B Gas Cooling Pump Drain Valve Functional Control Diagram

• D3F01083 1 0 3B Gas Cooling Pump Flush Valve Functional Control Diagram

• D3F01084 1 0 3B Gas Cooling Pump Post Flush Logic Functional Control Diagram



• D3F01085 1 0 3B Gas Cooling Valve Alarms Functional Control Diagram

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Number Sheet Rev Title Functional Control Diagrams

• D3F01086 1 0 3C Gas Cooling Pump Functional Control Diagram




• D3F01093 1 0 3C Gas Cooling Pump Suction Valve Functional Control Diagram

• D3F01094 1 0 3C Gas Cooling Pump Discharge Valve Functional Control Diagram

• D3F01095 1 0 3C Gas Cooling Pump Drain Valve Functional Control Diagram

• D3F01096 1 0 3C Gas Cooling Pump Flush Valve Functional Control Diagram

• D3F01097 1 0 3C Gas Cooling Pump Post Flush Logic Functional Control Diagram



• D3F01098 1 0 3C Gas Cooling Valve Alarms Functional Control Diagram

• D3F01100 1 0 Scrubber A Gas Cooling Header Isolation Valve Functional Control Diagram

• D3F01101 1 0 Scrubber B Gas Cooling Header Isolation Valve Functional Control Diagram

Loop Sheets

• 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

• B3IGCF5600 1 0 Loop Sheet JBR Gas CLNG Pump Gearbox CLNG WTR Flow GC-FISL-5600A/GC-FISL-5600B/GC-FISL-5600C

• B3IGCT5600 1 0 Loop Sheet JBR Gas CLNG Pump A Bearing Temperatures GC-TE-5600AK, AM, AN, AP, AQ

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Number Sheet Rev Title Loop Sheets

• B3IGCT5600 2 0 Loop Sheet JBR Gas CLNG Pump B Bearing Temperatures GC-TE-5600BK, BM, BN, BP, BQ

• B3IGCT5600 3 0 Loop Sheet JBR Gas CLNG Pump C Bearing Temperatures GC-TE-5600CK, CM, CN, CP, CQ

• B3IWX5603 1 0 Loop Sheet Gas Cooling Pump A Flush Valve WR-XV-5603A

• B3IWX5603 2 0 Loop Sheet Gas Cooling Pump B Flush Valve WR-XV-5603B

• B3IWX5603 3 0 Loop Sheet Gas Cooling Pump C Flush Valve WR-XV-5603C

• B3IGCX5604 1 0 Loop Sheet Gas Cooling Pump A Drain Valve GC-XV-5604A

• B3IGCX5604 2 0 Loop Sheet Gas Cooling Pump B Drain Valve GC-XV-5604B

• B3IGCX5604 3 0 Loop Sheet Gas Cooling Pump C Drain Valve GC-XV-5604C

• B3IGCP5608 1 0 Loop Sheet JBR Gas CLNG Pump Suction Strainer DP GC-PDIT-5608A/GC-PDIT-5608B/GC-PDIT-5608C

Instrument Data Sheets

• A3I41100 1 0 Instrumentation – Data Sheet Transmitter – Differential Pressure

• A3I44301 1 0 Instrumentation – Data Sheet Flow Indicating Switch

• A3I41201 1 0 Instrumentation – Data Sheet Pressure Gauges W/Seal

Installation Details

• B3I41103 1 0 Instrumentation Detail Differential Pressure Transmitter GC-PDIT-5608A

• B3I41104 1 0 Instrumentation Detail Differential Pressure Transmitter GC-PDIT-5608B

• B3I41105 1 0 Instrumentation Detail Differential Pressure Transmitter GC-PDIT-5608C

• B3I41201 1 0 Instrumentation Detail Pressure Gauge With Seal

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Number Sheet Rev Title Vendor O&M Manuals

• S85165 1 0 Scrubber - Flue Gas Desulphurization-Expansion Joints-Installation and Maintenance Manual

• S90838 1 0 Scrubber-FGD- Bearing Installation & Maintenance Guide

• S91389 1 0 Scrubber-Flue Gas Desulphurization-Installation, Operation & Maintenance Manual -Gas Cooling Pumps

• S90842 1 0 Scrubber - FGD- Enclosed Gear Drives Installation and Maintenance Instructions

• S90848 1 A Scrubber-FGD-Steelflez Couplings-Installation & Maintenance

• S90850 1 A Scrubber-FGD-Gear Couplings, Installation & Maintenance

• S90851 1 A Scrubber-FGD-Single Helical, Herringbone & Spur Gears, Installation & Maintenance

• S90852 1 A Scrubber-FGD-Ring Gear Installation Maintenance

• S90854 1 A Scrubber-FGD-Ultramax Gear Drives, Installation & Maintenance

• S92416 1 A Scrubber - FGD - Slurry Valve, Installation, Maintenance and Operating Instructions

Procedure Revision Summary

Revision Document Change:

0

Initial issue of document.

1

2

NOTE: See Revision Bars for specific changes within document.

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