ML17309A572

Rev 10 to EOP ECA-1.1, Loss of Emergency Coolant Recirculation.

ML17309A572
Person / Time
Site:	Ginna
Issue date:	04/20/1995
From:	Marlow T ROCHESTER GAS & ELECTRIC CORP.
To:
References
ECA-1.1, NUDOCS 9504280018
Download: ML17309A572 (43)

Text

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REV: 10 iECA-l.l LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 28 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE LANT SUPERINTEND T

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EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

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REV: 10 iECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 2 of 28 A. PURPOSE This procedure provides actions to restore emergency coolant recirculation capability, to delay depletion of the RWST by adding makeup and reducing outflow, and to depressurize the RCS to minimize break flow.

B. ENTRY CONDITIONS/SYMPTOMS

1. ENTRY CONDITIONS This procedure is entered from:

a. E-l, LOSS OF REACTOR OR SECONDARY COOLANT, when cold leg recirculation capability cannot be verified.

b ~ ES 1 3 g I TRANSFER TO COLD LEG REC RCULATION/

when recirculation cannot be established or maintained.

c ~ ECA 1 ~ 2 g I I LOCA OUTS DE CONTA NMENT g when a LOCA outside containment cannot be isolated.

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REV 10 4ECA-1 ' LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 3 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION o IF EMERGENCY COOLANT RECIRCULATION CAPABILITY IS RESTORED DURING THIS PROCEDURE, FURTHER RECOVERY ACTIONS SHOULD CONTINUE BY RETURNING TO PROCEDURE AND STEP IN EFFECT.

o IF SUCTION SOURCE IS LOST TO ANY SI OR CNMT SPRAY PUMP, THE PUMP SHOULD BE STOPPED.

NOTE: Adverse CNMT values should be used whenever CNMT ~ressure is greater than 4 psig or CNMT radiation is greater than 10+ R/hr.

1 Verify CNMT Sump Recirculation Capability:

a. Check RHR system: a. Manually or locally try to restore at least one train o RHR pumps - OPERABLE (Refer to Attachment RHR SYSTEM to identify minimum components o RHR suction valves from sump for one train).

B - OPERABLE

~ MOV-850A

~ MOV-850B o RHR pump discharge to Rx vessel deluge valves OPERABLE

~ MOV-852A

~ MOV-852B o CCW pumps - OPERABLE o CCW to RHR Hx - OPERABLE

~ MOV-738A

~ MOV-738B

b. Check at least two SW pumps b. Manually start SW pumps as power RUNNING supply permits (258 kw each).

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REV: 10 i ECA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION

~ ~

PAGE 4 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2 Add Makeup To RNST As Necessary o Refer to S-9J, BLENDING TO RWST

-OR-o Refer to S-3 'D, TRANSFERRING WATER FROM CVCS HUT(S) TO RWST OR SFP

-OR-o Refer to Attachment SFP-RWST CAUTION IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE WATER SOURCES FOR AFW PUMPS WILL BE NECESSARY (REFER TO ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).

NOTE: 1DAFW pump flow control valves fail open on loss of IA.

• 3 Monitor Intact S/G Levels:

a. Narrow range level - GREATER a. Maintain total .feed flow greater THAN 5S [25% adverse CNMT] than 200 gpm until narrow range level greater than 5% [25%

adverse CNMT] in at least one S/G.

b. Control feed flow to maintain b. IF narrow range level in any S/G narrow range level between 17% continues to increase, THEN stop

[25% adverse CNMT] and 50% feed flow to that S/G.

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REV: 10 iECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 5 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Shutdown margin should be monitored during RCS cooldown (Refer to Figure SDM).

4 Initiate RCS Cooldown To Cold Shutdown:

a. Establish and maintain cooldown rate in RCS cold legs - LESS THAN 100'F/HR

b. Dump steam to condenser from b. Manually or locally dump steam intact S/G(s) from intact S/G(s):

o Use S/G ARVs

-OR-o Open TDAFW pump steam supply valves.

-OR-o Dispatch AO to perform the following:

1) Open S/G MSIV bypass valves.

2) Open priming air ejector steam supply root valve, V-3578.

3) Open 1A and 1B priming air ejector isolation valves.

~ V-3580

~ V-3581 IF no intact S/G available, THEN use faulted S/G.

EOP:

REV: 10 iECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 6 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 5 Verify CNMT RECIRC Fans Running:

a. All fans - RUNNING a. Manually start fans.

b. Charcoal filter dampers green b. Dispatch personnel with relay status lights - EXTINGUISHED rack key to locally open dampers using trip relay pushbuttons in relay room racks.

~ AUX RELAY RACK RA-2 for fan A

~ AUX RELAY RACK RA-3 for fan C

• 6 Monitor RWST Level GREATER Go to Step 25.

THAN 154

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'CA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION I ~

PAGE 7 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 7 Determine CNMT Spray Requirements:

a. Determine number of CNMT spray pumps required from table:

CNMT CNMT RWST CNMT RECIRC FANS SPRAY PUMPS LEVEL PRESSURE RUNNING REQUIRED GREATER THAN 60 PSIG GREATER 0 OR 1 28'ETWEEN THAN 28 PSIG AND 60 PSIG 2 OR 3 ALL LESS THAN 28 PSIG THAN 60 PSIG 28'REATER BETWEEN 0, 1, 2, OR 3 15'ND BETWEEN 28 PSIG AND 60 PSIG ALL LESS THAN 28 PSIG LESS THAN 158

b. CNMT spray pumps running - EQUAL b. Manually, operate CNMT spray TO MINIMUM NUMBER REQUIRED pumps as necessary.

IF CNMT spray pump(s) must be stopped, THEN place switch in PULL STOP.

C' EOP: TITLE:

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 8 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, THEN SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G. MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

8 Reset SI If Necessary 9 Establish One Train Of SI Flow

a. SI pumps - LESS THAN THREE a. Stop one SI pump.

RUNNING

b. RCS pressure - LESS THAN b. Stop RHR pumps and go to Step 10.

250 psig [465 psig adverse CNMTj

c. RHR pump - ONLY ONE RUNNING c. IF two RHR pumps running, THEN stop one RHR pump.

IF no RHR pumps running, THEN start one RHR pump.

10 Verify No Backflow From RWST To Sump:

a. Any RHR suction valve from a. IF both RHR suction valves from sump B - OPEN sump B closed, THEN go to Step 11.

~ MOV-850A

~ MOV-850B

b. RWST outlet valve to RHR pump b. Perform the following:

suction (MOV-856) - CLOSED

1) Place MOV-856 key switch to ON[

2) Manually close valve IF valve can NOT be closed manually, THEN direct AO to locally close valve.

EOP:

REV: 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 9 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 11 Reset CI:

a. Depress CI reset pushbutton

b. Verify annunciator A-26, CNMT b. Perform the following:

ISOLATION - EXTINGUISHED

1) Reset SI.

2) Depress CI reset pushbutton.

12 Verify Adequate SW Flow:

a. Check at least two SW pumps a. Manually start SW pumps as power RUNNING supply permits (258 kw each).

IF less than two SW pumps running, THEN perform the following:

1) Ensure SW isolation.

2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)

3) Go to Step 15.

b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 10 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 13 Establish IA to CNMT:

a. Verify non-safeguards busses a. Perform the following:

energized from offsite power

1) Close.non-safeguards bus tie o Bus 13 normal feed - CLOSED breakers:

-OR- ~ Bus 13 to Bus 14 tie Bus 15 to Bus 16 tie o Bus 15 normal feed - CLOSED

2) Verify adequate emergency D/G capacity to run air compressors (75 kw each).

IF NOT, THEN evaluate RECIRC fans should. be if CNMT stopped (Refer to Attachment CNMT RECIRC FANS).

3) WHEN bus 15 restored, THEN reset control room lighting.

b. Verify SW isolation valves to b. Manually align valves.

turbine building - OPEN

~ MOV-4613 and.MOV-4670

~ MOV-4614 and MOV-4664 cd Verify at least two air c. Manually start air compressors compressors - RUNNING as power supply permits (75 kw each). IF air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.

.d. Check IA supply: d. Perform the following:

o Pressure - GREATER THAN 1) Continue attempts to restore 60 PSIG IA (Refer to AP-IA.1, LOSS OF INSTRUMENT AIR).

o Pressure - STABLE OR INCREASING 2) Continue with Step 14. WHEN IA restored, THEN do Steps 13e and f.

e. Reset both tiains of XY relays for IA to CNMT AOV-5392

f. Verify IA to CNMT AOV-5392 - OPEN

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REV 10 ECA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION

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PAGE ll of 28

')

STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 14 Establish Required Charging Line Flow:

a. Charging pumps - ANY RUNNING a. Perform the following:

1) IF CCW flow is lost to any RCP thermal barrier OR any RCP ¹1 seal outlet temperature offscale high, THEN dispatch AO with RWST area key to locally close seal injection needle valves to affected RCP:

~ RCP A, V-300A

~ RCP B, V-300B Ensure HCV-142 demand at 0%.

3) Start one charging pump.'

b. Establish 20 gpm total charging flow

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REV: 10 iECA-l.l LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 12 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP(S) SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.

15 Check RCP Status:

a. RCS subcooling based on core a. Stop all RCPs and go to Step 16.

exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING

b. RCPs - AT LEAST ONE RUNNING b. Try to start an RCP:

1) Establish conditions for starting an RCP o Bus 11A or 11B energized o Refer to Attachment RCP START

2) Start one RCP.

c. Stop all but one RCP

EOP:

REV'0

'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 13 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• 16 Monitor SI Termination Limit RCS injection flow to that Criteria: required to remove decay heat:

a. RCS subcooling based on core o Determine required injection exit T/Cs - GREATER THAN 50'F flow using Figure MIN RCS USING FIGURE MIN SUBCOOLING INJECTION

b. Check RVLIS indication: o Stop SI pumps as necessary to establish and maintain minimum o Level (no RCPs) - GREATER required SI flow.

THAN 68% [73% adverse CNMT]

o IF required injection flow is

-OR- less than 100 gpm, THEN establish required charging flow o Fluid fraction (any RCP and go to Step 17.

running) - GREATER THAN 80%

IF required injection flow is greater than 100 gpm, THEN perform the following:

a. Ensure one SI pump running

b. Establish minimum charging flow for RCP seal injection.

c. Consult TSC to determine if SI pump discharge valves should be locally throttled.

(Locked valve key required.)

d. Go to Step 18.

EOP: TITLE REV 10

'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 14 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 17 Stop SI And RHR Pumps And Place In Auto 18 Verify Adequate RCS Makeup Flow:

a. Check RVLIS indication: a. Increase RCS injection flow as necessary to maintain RVLIS o Le~el (no RCPs) - GREATER indication stable.

THAN 68% [73% adverse CNMT]

-OR-o Fluid fraction (any RCP running) - GREATER THAN 80%

b. Core exit T/Cs - STABLE OR b. Increase RCS injection flow to DECREASING maintain core exit T/Cs stable or decreasing.

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'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 15 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: If normal RCP support conditions can NOT be satisfied, then any running RCP(s) should be stopped.

19 Depressurize RCS To Decrease RCS Subcooling:

a. Check RCS subcooling based on a. Go to Step 20.

core exit T/Cs - GREATER, THAN 20'F USING FIGURE MIN SUBCOOLING

b. Normal PRZR spray -AVAILABLE b. Use one PRZR PORV. IF IA NOT available, THEN refer to Attachment N2 PORVS.

IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).

c. Depressurize RCS until either of the following conditions satisfied:

o RCS subcooling based on core exit T/Cs - LESS THAN 10'F USING FIGURE MIN SUBCOOLING

-OR-o PRZR level - GREATER THAN 87%

[75% adverse CNMT]

d. WHEN either condition met, THEN stop RCS depressurization

e. Check RCS subcooling - GREATER e. Increase RCS makeup flow as THAN O'F USING FIGURE MIN necessary to restore subcooling.

SUBCOOLING

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 16 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Check Can Be IfEstablished:

RHR Normal Cooling

a. RCS cold leg temperature - LESS a. Go to Step 21.

THAN 350'F

b. RCS pressure - LESS THAN b. Go to Step 21.

400 psig [300 psig adverse CNMT]

c. Place letdown pressure controller (PCV-135) in MANUAL CLOSED

d. Check following valves - OPEN d. Perform the following:

~ AOV-371, letdown isolation 1) Reset both trains of XY valve relays for AOV-371 and

~ AOV-427, loop B cold leg to AOV-427.

REGEN Hx

~ At least one letdown orifice 2) Open AOV-371.

valve (AOV-200A, AOV-200B, or AOV-202) 3) Place AOV-427 switch to OPEN.

4) Open one letdown orifice valve.

e. Verify pressure on PI-135 - LESS e. Go to Step 21.

THAN 400 PSIG

f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)

g. Consult TSC to determine if RHR normal cooling should be established using Attachment RHR COOL

EOP:

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ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION

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PAGE 17 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 Check Isolated:

If SI ACCUMs Should Be

a. Both RCS hot leg temperatures a. Continue with Step 22. WHEN LESS THAN 400'F both RCS hot leg temperatures less than 400'F, THEN do Steps 21b, c and d.

b. Dispatch AO with locked valve key to locally close breakers for SI ACCUM discharge valves

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

c. Close SI ACCUM discharge valves c. Vent any unisolated ACCUMs:

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

d. Locally reopen breakers for MOV-841 and MOV-865

• 22 Monitor RCP Operation:

a. RCPs - ANY RUNNING a. Go to Step 23.

b. Check the following: b. Stop affected RCP(s) .

o RCP ¹1 seal D/P - GREATER THAN 220 PSID o Check RCP seal leakage WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF

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REV 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 18 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 23 Check Core Exit T/Cs- Go to Step 38.

GREATER THAN 200'F 1

24 Check RWST Level LESS THAN Return to Step 1.

154 b

25 Minimize RWST Outflow:

a. Any SI pump(s) - RUNNING a. IF charging pump suction aligned to RWST, THEN perform the following:

1) Verify SI pump suction aligned to RWST, MOV-825A or MOV-825B open.

2) Start one SI pump and verify flow.

3) Stop running charging pumps.

4) Go to Step 25e.

b. Stop all but one SI pump

c. Check charging pump suction from c. Go to Step 25e.

RWST (AOV-112B) - OPEN

d. Stop all charging pumps

e. Stop both CNMT spray pumps

f. Stop both RHR pumps

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REV: 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 19 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 26 Check SI pump flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.

27 Try To Add Makeup To RCS From VCT: h

a. Check VCT level - GREATER THAN 5% a. Stop charging pumps taking suction from VCT and continue with Step 28. WHEN VCT level greater than 5%, THEN do Steps 27b and c.

b. Verify charging pumps aligned to b. Manually align valves as VCT necessary.

o LCV-112C - OPEN o LCV-112B - CLOSED

c. Start charging pumps as necessary to establish two pumps running

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~ ECA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 20 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 28 Establish Maximum VCT Makeup:

a. Check RMW control armed - RED a. Place RMW mode switch in AUTO LIGHT LIT and place RMW control switch to START.

b. Check VCT level - LESS THAN 20% b. Continue with Step 29. WHEN VCT level less than 20%, THEN do Steps 28c, d and e.

c. Check VCT makeup system- c. Perform the following:

OPERATING IN AUTO

1) Open makeup system valves.

~ AOV-llOB

~ AOV-110C

~ AOV-ill

2) Start BA transfer pumps and RMW pumps.

3) Open boric acid flow control valve (AOV-110A).

d. Increase VCT makeup flow

1) Start both RMW pumps

2) Start both boric acid pumps

3) Adjust RMW controller (HC-111) in MANUAL to maximum flow from table BAST MAX RMW CONC (PPM) FLOW (GPM) 7000 (4a) 40 8750 (5%) 54 10500 (6%) 65 12250 (7%) 80 14000 (8%) 92

4) Adjust boric acid flow controller (HC-110A) in MANUAL to 9.5 gpm

e. Adjust charging pump speed to stabilize VCT level

EOP:

REV: 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 21 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 29 Try To Add Makeup To RCS From Alternate Source:

a. Evaluate Use Of RCDT Pumps (Refer to ER-RHR.1, RCDT PUMP OPERATION FOR CORE COOLING)

b. Consult TSC to determine other means of makeup 30 Verify SI ACCUM Isolation IF valves were closed to prevent SI Valves OPEN ACCUM nitrogen injection, THEN go to Step 34.

~ MOV-841

~ MOV-865 IF NOT, THEN perform the following:

a. Dispatch AO to locally close breakers for SI ACCUM discharge valves

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

b. Open SI ACCUM discharge valves.

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.ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 22 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 31 Depressurize All Intact S/Gs To 785 PSIG

a. Check S/G pressures - GREATER a. Go to Step 32.

THAN 785 PSIG

b. Dump steam to condenser at b. Manually or locally dump steam maximum rate at maximum rate from intact S/G(s):

o Use S/G ARVs

-OR-o Open steam supply valves to TDAFW pump

-OR-o Dispatch AO to perform the following:

1) Open S/G MSIV bypass valves.

2) Open priming air ejector steam isolation valves

~ V-3580

~ V-3581

c. Check S/G pressures - LESS THAN c. Return to Step 3lb.

785 PSIG

d. Stop S/G depressurization

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 23 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: The intent of Step 32 is to depressurize S/Gs more slowly, but at a rate that will maintain required RVLIS level.

32 Depressurize Intact S/Gs To 200 PSIG Slowly To Inject SI ACCUMs:

a. Dump steam to condenser as a. Manually or locally dump steam necessary to maintain from intact S/G(s) to maintain appropriate RVLIS indication: appropriate RVLIS indication: ~

o Level (no RCPs) - BETWEEN 68% o Use S/G ARVs AND 73% [73% AND 76% adverse CNMT] -OR;

-OR- o Open steam supply valves to TDAFW pump o Fluid fraction (any RCP running) - BETWEEN 80% AND 90% -OR-o Dispatch AO to perform the following:

1) Open affected S/G MSIV bypass valve.

2) Open priming air ejector steam isolation valves

~ V-3580

~ V-3581

b. Check S/G pressures - LESS THAN b. Return to Step 32a.

200 PSIG

c. Stop S/G depressurization

EOP:

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 24 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 33 Check Isolated:

If SI ACCUMs Should Be

a. Both RCS hot leg temperatures a. Continue with Step 34. WHEN LESS THAN 400'F both RCS hot leg temperatures less than 400'F, THEN do Steps 33b, c and d.

b. Dispatch AO with locked valve key to locally close breakers for SI ACCUM discharge valves

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

c. Close SI ACCUM discharge valves c. Vent any unisolated ACCUMs:

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

d. Locally reopen breakers for MOV-841 and MOV-865

• 34 Monitor RCP Operation:

a. RCPs - ANY RUNNING a. Go to Step 36.

b. Check the following: b. Stop affected RCP(s).

o RCP ¹1 seal D/P - GREATER THAN 220 PSID o Check RCP seal leakage WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 25 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 35 Check SI Pump Flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.

36 Depressurize All Intact S/Gs To Atmospheric Pressure:

a. Maintain cooldown rate in RCS cold legs - LESS THAN 100'F/HR

b. Dump steam to condenser b. Manually or locally dump steam from intact S/G(s):

o Use S/G ARVs

-OR-o Open steam supply valves to TDAFW pump

-OR-o Dispatch AO to perform the following:

1) Open S/G MSIV bypass valves.

2) Open priming air ejector steam isolation valves

~ V-3580

~ V-3581

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 26 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 37 Check Can Be IfEstablished:

RHR Normal Cooling

a. RCS cold leg temperature - LESS a. Return to Step 35.

THAN 350'F

b. RCS pressure - LESS THAN b. Return to Step 35.

400 psig [300 psig adverse CNMT]

c. Place letdown pressure controller in MANUAL CLOSED

d. Check following valves - OPEN d. Perform the following:

~ AOV-371, letdown isolation 1) Reset both trains of XY valve relays for AOV-371 and

~ AOV-427, loop B cold leg to AOV-427.

REGEN Hx

~ At least, one letdown orifice 2) Open AOV-371 and AOV-427.

valve (AOV-200A, AOV-200B, or AOV-202) 3) Open one letdown orifice valve.

II

e. Verify pressure on PI-135 - LESS e. Return to Step 36.

THAN 400 PSIG

f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)

g. Consult TSC to determine if RHR normal cooling should be established using Attachment RHR COOL

EOP:

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~ ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 27 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

'38 Maintain RCS Heat Removal:

a. Use RHR system if in service

b. Dump steam to condenser from b. Manually or locally dump steam intact S/Gs from intact S/G(s):

o Use S/G ARVs

-OR-o Open steam supply valves to TDAFW pump

-OR-o Dispatch AO to perform the following:

1) Open S/G MSIV bypass valves.

2) Open priming air ejector steam isolation valves

~ V-3580

~ V-3581 IF no intact S/G available and RHR system NOT in service, THEN use faulted S/G.

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~ ECA-1. 1 LOSS OF. EMERGENCY COOLANT RECIRCULATION PAGE 28 of 28 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: This procedure should be continued while obtaining CNMT hydrogen sample in Step 39.

39 Check CNMT Hydrogen Concentration:

a. Direct RP to start CNMT hydrogen monitors as necessary

b. Hydrogen concentration - LESS b. Consult TSC to determine if THAN 0.5$ hydrogen recombiners should be placed in service.

40 Consult TSC

-END-

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REV 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 1 ECA-1.1 APPENDIX LIST TITLE PAGES

1) FIGURE MIN SUBCOOLING

2) FIGURE SDM

3) FIGURE MIN RCS INJECTION

4) FIGURE RCP SEAL LEAKOFF

5) ATTACHMENT RHR COOL

6) ATTACHMENT SFP-RWST

7) ATTACHMENT RCP START

8) ATTACHMENT SD-1

9) ATTACHMENT CNMT RECIRC FANS

10) ATTACHMENT RHR SYSTEM

11) ATTACHMENT N2 PORVS

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'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE: Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication RC S PRESSURE (PSIG) 2500 2400 RCS PRESSURE 2300 INCREHENTS 20 PSIG 2200 2100 2000 1900 1800 1700 1600 1500 1400 SUBCOOLED 1300 REGION 1200 1100 1000 900 800 INADEQUATE 700 SU BCOOLING 600 ADVERSE C NHT REGION 500 400 300 200 NORMAL CNHT TEHPERATURE INCREHENTS 10'F 100 0

200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE ('F)

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'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 1 FIGURE SDM NOTE: o Curve includes allowance for one stuck rod. Add 100 ppm for each additional stuck rod.

o To obtain core burnup, use PPCS point ID BURNUP.

BORON CONCENTRATION (PPH) 1800 BORON INCREMENTS 20 PPH 1600 1400 ADEQUATE SDM 1200 100 PPH CONSERVATISH'NCLUDED 1000 800 600 400 BO TE 200 BURNUP INCREMENTS 100 HWD/HTU 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 CYCLE 25 BURNUP (HWD/MTU)

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REV: 10 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 1 FIGURE MIN RCS INJECTION RE(VIREO INJECTION FLOW RATE (GPH) 350 300 250 200 150 100 INADEQUATE INJECTION FLOW 50 10 100 1000 10000 TINE FROM REACTOR TRIP (MINUTES)

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'ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION PAGE 1 of 1 FIGURE RCP SEAL LEAKOFF

¹1 SEAL LEAK RATE (GPH) 6 LEAK RATE INCREMENTS 0.2 GPM NORHAL OPERATING RANGE DP INCREMENTS 50 PSI 250 500 750 1000 1250 1500 1750 2000 '250 2500

¹1 SEAL DP (RCS PRESS - VCT PRESS) PSI

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