Revision as of 17:34, 29 October 2019

Text

Rev 9 to EOP ES-1.2, Post-LOCA Cooldown & Depressurization.
	ML17262A890
Person / Time
Site:	Ginna
Issue date:	05/06/1992
From:	; ROCHESTER GAS & ELECTRIC CORP.
To:	;
Shared Package
ML17262A884	List: ML17262A883; ML17262A885; ML17262A886; ML17262A887; ML17262A888; ML17262A889; ML17262A890; ML17262A891; ML17262A892; ML17262A893; ML17262A895; ML17262A896; ML17262A897; ML17309A489;
References
	ES-1.2, NUDOCS 9206160397
	Download: ML17262A890 (56)
	v • d • e

EOP:

REV: 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 1 of 23 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT EF CT VE DATE CATEGORY 1.0 REVIEWED BY:

9206160397 920605 PDR ADOCK 05000244 P PDR

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EOP TITLE:

REV: 9 ES-1 ' POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 2 of 23 A. PURPOSE This procedure provides actions to cool down and depressurize the RCS to cold shutdown conditions following a loss of reactor coolant inventory.

B. ENTRY CONDITIONS/SYMPTOMS 1~ ENTRY CONDITIONS This procedure is entered from:

E 1g LOSS OF REACTOR OR SECONDARY COOLANT f when RCS pressure is greater than the shutoff head pressure of the RHR pumps.

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TITLE:

EOP'S-1 REV: 9

' POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 3 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION IF RWST LEVEL DECREASES TO LESS THAN 28$ , THEN THE SI SYSTEM SHOULD BE ALIGNED FOR COLD LEG RECIRCULATION USING ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, STEP 1.

NOTE: o Foldout page should be open and monitored periodically.

o Adverse CNMT values should be used whenever CNMT pressure fs greater than 4 psig or CNMT radiation is greater than 10+0~ R/hr.

1 Verify All AC Busses Perform the following:

ENERGIZED BY OFFSITE POWER

a. IF any AC emergency bus normal o Normal feed breakers to all 480 feed breaker open, THEN ensure volt busses - CLOSED associated D/G breaker closed.

o 480 bus voltage - GREATER THAN b. Perform the following, as 420 VOLTS necessary:

o Emergency D/G output breakers 1) Close non-safeguards bus tie OPEN breakers:

~ Bus 13 to Bus 14 tie

~ Bus 15 to Bus 16 tie

2) Place the following pumps in PULL STOP' EH pumps

~ Turning gear oil pump

~ HP seal oil backup pump

3) Restore power to MCCs.

~ A from Bus 13

~ B from Bus 15

~ E from Bus 15

~ F from Bus 15

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

5) Refer to Attachment SI/UV for other equipment lost with loss of offsite power.

c. Try to restore offsite power to all AC busses (Refer to ER-ELEC.l, RESTORATION OF OFFSITE POWER).

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EOP: T!TLF.:

REV: 9 ES-1 ~ 2 POST LOCA COOZDOWN AND DEPRESSURIZATION PAGE 4 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

* * * * *

4' ********************************

CAUTION RCS PRESSURE SHOULD BE MONITORED. IF RCS PRESSURE DECREASES TO LESS THAN 250 PSIG [465 PSIG ADVERSE CNMT), THE RHR PUMPS MUST BE MANUALLY RESTARTED TO SUPPLY WATER TO THE RCS.

2 Check Stopped:

If RHR Pumps Should Be

a. Check RCS pressure: a. Go to Step 3.

1) Pressure - GREATER THAN 250 psig (465 psig adverse CNMT]

2) Pressure - STABLE OR INCREASING

b. Stop RHR pumps and place AUTO

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EOP: TITLE:

REV: 9 ES-1 ' POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 5 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 3 Establish 75 GPM Charging 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 isolate seal injection to affected RCP:

~ V-300A for RCP A

~ V-300B for RCP B

2) Ensure HCV-142 open, demand at 0%.

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b. Align charging pump suction to b. IF LCV-112B can NOT be opened, RWST: THEN perform the following:

o LCV-112B - OPEN 1) Verify charging pump A NOT running and place in PULL o LCV-112C - CLOSED STOP.

2) Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).

3) WHEN V-358 open, THEN direct AO to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).

.c. Start charging pumps as necessary (75 kw each) and establish 75 gpm total charging flow

~ Charging line flow

~ Seal injection flow

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EOP: TITLE:

REV: 9 ES-1 ' POST LOCA C'OQLDQWN AND DEPRESSURIZATION PAGE 6 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Establish Condenser Steam Dump Pressure Control:

a. Verify condenser available: a. Place S/G ARV controllers in AUTO at desired pressure and go o Any MSIV - OPEN to Step 5.

o Annunciator G-15, STEAM DUMP LIT

b. Adjust condenser steam dump controller HC-484 to desired pressure and verify in AUTO

c. Place steam dump mode selector switch to MANUAL

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: TDAFW pump flow control valves fail open on loss of IA.

5 Check Intact S/G Levels:

a. Narrow range level - GREATER a. Maintain total feed flow greater THAN 5% [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 in an

[25% adverse CNMT] and 50% uncontrolled manner, THEN go to E-3, STEAM GENERATOR TUBE RUPTURE, Step l.

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EOP:

REV: 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 7 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Shutdown margin should be monitored during RCS cooldown (Refer to Figure SDM).

6 Initiate RCS Cooldown To Cold Shutdown:

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

b. Use RHR system if in service

c. Dump steam to condenser from c. Manually or locally dump steam intact S/G(s) using intact S/Gs ARV.

7 Check RCS Subcooling Based On Manually operate SI pumps as Core Exit T/Cs GREATER THAN necessary and go to Step 19.

O'F USING FIGURE MIN SUBCOOLING 8 Check SI and RHR Pump Status: Go to Step 15.

o SI pumps - ANY RUNNING

-OR-o RHR pumps - ANY RUNNING IN INJECTION MODE 9 Place PRZR Heater Switches In The Following Positions:

o PRZR heater control group - PULL STOP o PRZR heater backup group - OFF

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EOP: TITLE:

REV' ES-1 ' POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE, 8 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSURIZATION. THIS WILL RESULT IN A RAPIDLY INCREASING PRZR LEVEL.

* * * * * * * * * * * * * * * * *

6 * * * * * * * * * * *.IL' ********

NOTE: o WHEN using a PRZR PORV, THEN select one with an operable block valve.

o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.

10 Depressurize RCS To Refill PRZR

a. Depressurize using normal PRZR a. Depressurize using one PRZR spray if available PORV. IF IA NOT available, THEN refer to Attachment N2 PORVS.

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

b. PRZR level - GREATER THAN 13% b. Continue with Step 11. WHEN

[40% adverse CNMT] level greater than 13% [40%

adverse CNMT), THEN stop RCS depressurization.

c. Stop RCS depressurization

CA EOP: TITLE:

REV 9 ES-1-2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 9 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.

11 Check Started:

If An RCP Should Be

a. Both RCPs - STOPPED a. Stop all but one RCP and go to Step 12.

b. RCS subcooling based on core b. Go to Step 19.

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

c. PRZR level - GREATER THAN 13% c. Return to Step 10.

[40% adverse CNMT]

d. Try to start an RCP d. IF IA to CNMT available, THEN ensure at least one control rod

1) Establish conditions for .shroud fan running (45 kw each).

starting an RCP o Bus llA or llB energized o Refer to Attachment RCP START

2) Start one RCP

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EOP: TIZLE0 REV: 9 ES-1-2 POST LOCP, COOLDOWN AND DEPRESSURIZATION PAGE 10 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 12 Check Pumps If One Should Of Three SI Be Stopped:

a. Three SI pumps -,RUNNING a. Go to Step 13.

b. RCS subcooling based on core b. IF RCS hot leg temperatures exit T/Cs - GREATER THAN-35'F greater than 325'F [270'F

[90'F adverse CNMT] USING FIGURE adverse CNMT] OR IF RHR normal MIN SUBCOOLING cooling in service, THEN go to Step 19.

IF RHR normal cooling NOT in service AND RCS hot leg temperatures less than 325'F

[270'F adverse CNMT], THEN ensure at least one RHR pump running in injection mode and go to Step 12c. IF no RHR pump can be operated in injection mode, THEN go to Step 19.

c. Check PRZR level - GREATER THAN c. Do NOT stop SI pump. Return to 13% [40% adverse CNMT] Step 10.

d. Stop one SI pump

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EOP: TITLE REV: 9 ES-1.2 LOCA COOLDOWN AND DEPRESSURIZATION PAGE 11 of 23 STEP ,

ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 13 Check If One Of Two SI Pumps Should Be Stopped:

a. Two SI pumps - RUNNING a. Go to Step 14.

b. Determine required RCS subcooling from table:

Charging Pump RCS Subcooling Criteria Availability NONE 120'F [200'F adverse CNMT]

ONE 115'F [190'F adverse CNMT]

105'F [180'F adverse CNMT]

THREE 100'F [175'F adverse CNMT]

c. RCS subcooling based on core c. IF RCS hot leg temperatures exit T/Cs - GREATER THAN VALUE greater than 325'F [270'F FROM TABLE ABOVE USING FIGURE adverse CNMT] OR IF RHR normal MIN SUBCOOLING cooling in service, THEN go to Step 19.

IF RHR normal cooling NOT in service AND RCS hot leg temperatures less than 325'F

[270'F adverse CNMT], THEN ensure at least one RHR pump running in injection mode and go to Step 13d. IF no RHR pump can be operated in injection mode, THEN go to Step 19.

d. PRZR level - GREATER THAN 13% d. Do NOT stop SI pump. Return to

[40% adverse CNMT) Step 10 '

e. Stop one SI pump

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EOP: TITLE:

REV: 9 ES-1.2 LOCA CPPLDOWN AND DEPRESSURIZATION PAGE 12 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 14 Check Be If Last Stopped:

SI Pump Should

a. One SI pump - RUNNING a. IF any RHR pump running in injection mode, THEN go to Step 19. IF NOT, THEN go to Step 15.

b. Determine required RCS subcooling from table:

Charging Pump RCS Subcooling Criteria Availability NONE Insufficient subcooling to stop SI pump.

ONE 255'F [295'F adverse CNMT]

TWO 235'F [285'F adverse CNMT]

THREE 210'F [270'F adverse CNMT]

c. RCS subcooling based on core c. IF RCS hot leg temperatures exit T/Cs - GREATER THAN VALUE greater than 325'F [270'F FROM TABLE ABOVE USING FIGURE adverse CNMT] OR IF RHR normal MIN SUBCOOLING cooling in service, THEN go to Step 19.

IF RHR normal cooling NOT in service AND RCS hot leg temperatures less than 325'F

[270'F adverse CNMT], THEN ensure at least one RHR pump running in injection mode and go to Step 14d. IF no RHR pump can be operated in injection mode, THEN go to Step 19.

d. PRZR level - GREATER THAN 13% d. Do NOT stop SI pump. Return to

[40% adverse CNMT] Step 10.

e. Stop running SI pump

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EOP REV: 9 ES-1.2 POST LOCA COOLDONN AND DEPRESSURIZATION PAGE 13 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 15 Check Be If Charging Controlled Flow Should To Maintain PRZR Level:

a. Check RHR pumps - RUNNING IN a.'Start charging pump and control INJECTION MODE charging flow to maintain PRZR level and go to Step 16.

b. Go to Step 19

CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.

16 Check RCP Status:

a. RCPs - AT LEAST ONE RUNNING a. Perform the following:

1) Establish conditions for starting an RCP:

o Verify Bus 11A or llB energized.

o Refer to Attachment RCP START.

2) Start one RCP.

IF an RCP can NOT be started, THEN verify natural circulation (Refer to Attachment NC).

IF natural circulation NOT verified, THEN increase dumping steam.

b. Stop all but one RCP

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T!TLE:

REV' ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 14 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

- - - - CAUTION VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSURIZATION. THIS WILL RESULT IN A RAPIDLY INCREASING PRZR LEVEL.

NOTE: o WHEN using a PRZR PORV, THEN select one with an operable block valve.

o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.

17 Depressurize RCS To Minimize RCS Subcooling:

a. Depressurize using normal PRZR a. IF normal spray NOT available, spray if available THEN use one PRZR PORV. IF IA, refer to NOT available, THEN Attachment N2 PORVS.

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

b. Energize PRZR heaters as necessary

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 75%

f65% adverse CNMT]

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EOP: TITLE:

REV 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 15 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Verify Adequate Shutdown Margin

a. Direct HP to sample RCS for boron concentration

b. Verify boron concentration- b. Borate as necessary.

GREATER THAN REQUIREMENTS OF FIGURE SDM 19 Verify SI Flow Not Required:

a. RCS subcooling based on core a. Manually operate SI pumps as exit T/Cs - GREATER THAN O' .necessary and go to Step 20.

USING FIGURE MIN SUBCOOLING

b. PRZR level - GREATER THAN 5% b. Manually operate SI pumps as

[30% adverse CNMT) necessary and return to Step 10.

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EOP:

REV 9 ES-1.2 POST 'LOCA COQLDOWN AND DEPRESSURIZATION PAGE 16 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Check If SI Isolated:

ACCUMs Should Be

a. RCS subcooling based on core a. IF both RCS hot leg temperatures exit T/Cs - GREATER THAN O' less than 400'F, THEN go to USING FIGURE MIN SUBCOOLING Step 20c.

IF NOT, THEN go to Step 21.

b. PRZR level - GREATER THAN 5% b. Return to Step 10.

f308 adverse CNMT)

c. 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

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

~ ACCUM A, MOV-841 1) Open vent valves for

~ ACCUM B, MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

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

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EOP: T!TLE:

REV: 9 ES-1.2 POST LOCA COOI,DOWN AND DEPRESSURIZATION PAGE 17 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 Check If Emergency Should Be Stopped:

D/Gs

a. Verify AC emergency busses a. Try to restore offsite power energized by offsite power: (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).

o Emergency D/G output breakers OPEN o AC emergency bus voltage GREATER THAN 420 VOLTS o AC emergency bus normal feed breakers - CLOSED

b. Stop any unloaded emergency D/G and place in standby (Refer to Attachment D/G STOP) 22 Verify Adequate SW Flow To CCW Hx:

a. Verify at least two SW pumps a. Manually start pumps as power RUNNING supply permits (258 kw per pump). IF less than two SW pumps can be operated, THEN go to Step 23.

b. Verify AUX BLDG SW isolation b. Establish SW to AUX BLDG (Refer valves - OPEN ~

to Attachment AUX BLDG SW).

~ MOV-4615 and MOV-4734

~ MOV-4616 and MOV-4735

c. Verify CNMT RECIRC fan cd Dispatch AO to locally throttle annunciator C-2, HIGH flow to CCW Hx to between TEMPERATURE ALARM - EXTINGUISHED 5000 gpm and 6000 gpm total flow.

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EOP:

REV: 9 ES-1.2 POST LOCA CPPLDPWN AND DEPRESSURIZATION PAGE 18 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 23 Check RCP Cooling Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).

a. Check CCW to RCPs o Annunciator A-7, RCP 1A CCW RETURN HIGH TEMP OR LOW FLOW EXTINGUISHED o Annunciator A-15, RCP 1B CCW RETURN HIGH TEMP OR LOW FLOW EXTINGUISHED
b. Check RCP seal injection o Labyrinth seal D/Ps - GREATER THAN 15 INCHES WATER
-OR-o RCP seal injection flow to each RCP - GREATER THAN 6 GPM
I EOP: TITLE:
REV: 9 ES-1 ' LOCA COOLDOWN AND DEPRESSURIZATION PAGE 19 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 24 Check If Seal Return Flow Should Be Established:
a. Verify instrument bus D- a. Restore power to instrument bus ENERGIZED D from MCC B or MCC A (maintenance supply).
b. Verify RCP ¹1 seal outlet b. Go to Step 25.
temperature - LESS THAN 235'F
c. Verify RCP seal outlet valves c. Manually open valves as OPEN necessary.
~ AOV-270A
~ ,AOV-270B
d. Reset both trains of'XY relays for RCP seal return isolation valve MOV-313
e. Open RCP seal return isolation e. Perform the following:
valve MOV-313
1) Place MOV-313 switch to OPEN.
2) Dispatch AO with key to RWST gate to locally open MOV-313.
f. Verify RCP ¹1 seal leakoff flow f. IF any RCP seal leakoff flow LESS THAN 5.5 GPM greater than 5.5 gpm, THEN:
o Close the affected RCP seal discharge valve
~ RCP A, AOV-270A
~ RCP B, AOV-270B o Trip the affected RCP IF both RCP seal discharge valves are shut, THEN go to Step 25.
g. Verify RCP ¹1 seal leakoff flow g. Refer to AP-RCP.1, RCP SEAL GREATER THAN 0.25 GPM MALFUNCTIONS
EOP: TITLE:
REV: 9 ES-1 ~ 2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 20 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Adverse CNMT conditions or loss of forced air cooling may result in failure of NIS detectors.
25 Check If Source Detectors Should Range Be Energized:
a. Source range channels a. Go to Step 25e.
DEENERGIZED
b. Check intermediate range flux- b..Perform the following:
EITHER CHANNEL LESS THAN 10 10 AMPS 1) IF neither intermediate range channel is decreasing, THEN initiate boration.
2) Continue with Step 26. WHEN flux is LESS THAN 10 amps on any operable channel, THEN do Steps 25c, d and e.
c. Check the following: c. Continue with Step 26. WHEN either condition met, THEN do o Both intermediate range Steps 25d and e.
channels - LESS THAN 10 AMPS
-OR-o Greater than 20 minutes since reactor trip
d. Verify source range detectors d. Manually energize source range ENERGIZED detectors by depressing P-6 permissive defeat pushbuttons (2 of 2).
IF source ranges can NOT be restored, THEN refer to ER-NIS.1, SR MALFUNCTION and go to Step 25.
e. Transfer Rk-45 recorder to one source range and one intermediate range channel
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EOP: TITLE:
REV: 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATZON PAGE 21 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT, OBTAINED 26 Establish Normal Shutdown Alignment:
a. Check condenser - AVAILABLE a. Dispatch AO to perform Attachment SD-2.
b. Perform the following:
o Open generator disconnects
~ 1G13A71
~ 9X13A73 o Place voltage regulator to OFF o Open turbine drain valves o Rotate reheater steam supply controller cam to close valves o Place reheater dump valve switches to HAND o Stop all but one condensate pump
c. Verify adequate Rx head cooling:
1) Check IA to CNMT - AVAILABLE 1) Go to Step 26d.
2) Verify at least one control 2) Manually start one fan as rod shroud fan - RUNNING power supply permits (45 kw)
3) Verify one Rx compartment 3) Perform the following:
cooling fan - RUNNING o Dispatch AO to reset UV relays at MCC C and MCC D.
P o Manually start one fan as power supply permits (23 kw)
d. Verify Attachment SD COMPLETE
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EOP: TITLE:
REV 9 ES-1 ' POST LOCA COOLDONN AND DEPRESSURIZATION PAGE 22 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 27 Check If RCPs Must Be Stopped:
a. RCPs - ANY RUNNING a. Go to Step 28.
b. Check the following: b. Go to Step 28.
o RCP ¹1 seal D/P - LESS THAN 220 PSID
-OR-o Check RCP seal leakage - LESS THAN 0.25 GPM
c. Stop affected RCP(s) 28 Check Condenser Steam Dump Use intact S/G ARV for RCS Available CONDENSER VACUUM 'temperature control.
GREATER THAN 20 INCHES HG 29 Check Can Be IfEstablished:
RHR Normal Cooling
a. RCS cold leg temperature - LESS a. Return to Step 5 ~
THAN 350'F
" b. RCS pressure - LESS THAN b. Go to Step 30.
400 psig [300 psig adverse CNMT]
c. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
d. Consult TSC to determine if RHR normal cooling should be established using Attachment RHR COOL
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EOP: TITLE:
REV: 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 23 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 30 Check Core Exit T/Cs LESS Return to Step 5 ~
THAN 200'F 31 Evaluate Long Term Plant Status:
I
a. Maintain cold shutdown conditions
b. Consult TSC
-END-
11 EOP:
REV: 9 ES-1 ' POST LOCA COOLPOWN AND DEPRESSURIZATION PAGE 1 of 1 ES-1.2 APPENDIX LIST TITLE PAGES
1) RED PATH
SUMMARY
2) FIGURE MIN SUBCOOLING
3) FIGURE SDM
4) ATTACHMENT SEAL COOLING
5) ATTACHMENT RCP START
6) ATTACHMENT NC
7) ATTACHMENT D/G STOP
8) ATTACHMENT SD-1
9) ATTACHMENT SD-2
10) ATTACHMENT SI/UV
11) ATTACHMENT N2 PORVS
12) ATTACHMENT RHR COOL
13) ATTACHMENT AUX BLDG SW
14) FOLDOUT
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REV' ES-1 ' POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 1 of 1 RED PATH
SUMMARY
a. SUBCRITICALITY Nuclear power greater than 54
b. CORE COOLING Core exit T/Cs greater than 1200'F
-OR-Core exit T/Cs greater than 700'F AND RVLIS level (no RCPs) less than 434 [464 adverse CNMT]
c. HEAT SINK Narrow range level in all S/Gs less than 5%
[254 adverse CNMT] AND total feedwater flow less than 200 gpm
d. INTEGRITY Cold leg temperatures decrease greater than 100'F in last 60 minutes AND RCS cold leg temperature less than 285'F
e. CONTAINMENT CNMT pressure greater than 60 psig
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EOP: TITLE:
REV: 9 ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION 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 900 800 700 INADEQUATE SUBCOOLING 600 DVERSE CNH REGION 500 400 300 200 NORHAL CNHT TEHPERATURE INCREHENTS 10'F 100 0
20 0 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE ('F)
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4 I ' 4
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EOP: TITLE:
REV 9 ES-1 ' .POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 1 of 1 FIGURE SDM BORON CONCENTRATION (PPH) 1800 BORON INCREMENTS 20 PPH 1600 1400 ADEQUATE SDM 1200 100 PPM CONS ERVATISH INCLUDED 1000 80O 600 400 BORATE 200 BURNUP INCREMENTS 100 MWD/HTU 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 CYCLE 22 BURNUP (HWD/HTU) 1 NOTE: To obtain core burnup, use PPCS turn on code BURNUP.
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EOP: TITLE:
REV: 9 ES-1 ~ 2 POST LOCA COOLDOWN AND DEPRESSURIZATION PAGE 1 of 1 FOLDOUT PAGE SI REINITIATION CRITERIA IF ElTHER condition listed below occurs, THEN manually operate SI pumps as necessary:
o RCS subcooling based on core exit T/Cs LESS THAN O'F USING FIGURE MIN SUBCOOLING OR o PRZR level CHARGING CAN NOT CONTROL LEVEL GREATER THAN 54
[30% adverse CNMT]
2. SI TERMINATION CRITERIA IF ALL conditions listed below occur, THEN go to ES-1.1, SI TERMINATION, Step 1:
a. RCS subcooling based on core exit T/Cs GREATER THAN O'F USING FIGURE MIN SUBCOOLING
b. Total feed flow to intact S/Gs GREATER THAN 200 GPM OR Narrow range level in at least one intact S/G GREATER THAN 54 [254 adverse CNMT]
c. RCS pressure:
o GREATER THAN 1625 PSIG [1825 psig adverse CNMT]
o STABLE OR INCREASING
d. PRZR level GREATER THAN 5% [30~ adverse CNMT]
3. SECONDARY INTEGRITY CRITERIA IF any S/G pressure is decreasing in an uncontrolled manner or is completely depressurized AND has not been isolated, THEN go to E-2, FAULTED S/G ISOLATION, Step 1.
4. COLD LEG RECIRCULATION SWITCHOVER CRITERION IF RWST level decreases to less than 284, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.
5. AFW SUPPLY SWITCHOVER CRITERION IF CST level decreases to less than 5 feet, THEN switch to alternate AFW water supply (Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
6. E-3 TRANSITION CRITERIA IF any S/G level increases in an uncontrolled manner, or any S/G has abnormal radiation, THEN go to E-3, STEAM GENERATOR TUBE RUPTURE, Step 1.

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