ML17262A890: Difference between revisions

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| number = ML17262A890
| number = ML17262A890
| issue date = 05/06/1992
| issue date = 05/06/1992
| title = Rev 9 to EOP ES-1.2, Post-LOCA Cooldown & Depressurization.
| title = Rev 9 to EOP ES-1.2, Post-LOCA Cooldown & Depressurization
| author name =  
| author name =  
| author affiliation = ROCHESTER GAS & ELECTRIC CORP.
| author affiliation = ROCHESTER GAS & ELECTRIC CORP.
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:EOP: ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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 t'went'i I" r EOP ES-1'TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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.
{{#Wiki_filter:EOP:
B.ENTRY CONDITIONS/SYMPTOMS 1~ENTRY CONDITIONS
ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
-This procedure is entered from: E 1 g LOSS OF REACTOR OR SECONDARY COOLANT f when RCS pressure is greater than the shutoff head pressure of the RHR pumps.
9 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:
6 I<<la+~
9206160397 920605 PDR ADOCK 05000244 P
EOP'S-1'TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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.
PDR
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-ENERGIZED BY OFFSITE POWER o Normal feed breakers to all 480 volt busses-CLOSED o 480 bus voltage-GREATER THAN 420 VOLTS o Emergency D/G output breakers OPEN Perform the following:
 
a.IF any AC emergency bus normal feed breaker open, THEN ensure associated D/G breaker closed.b.Perform the following, as necessary:
t '
1)Close non-safeguards bus tie 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).  
went'i I"
'\4'.%k4\Q~+gal h t EOP: ES-1~2 T!TLF.: POST LOCA COOZDOWN AND DEPRESSURIZATION REV: 9 PAGE 4 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*******4'********************************CAUTION RCS PRESSURE SHOULD BE MONITORED.
r
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 If RHR Pumps Should Be Stopped: a.Check RCS pressure: 1)Pressure-GREATER THAN 250 psig (465 psig adverse CNMT]2)Pressure-STABLE OR INCREASING a.Go to Step 3.b.Stop RHR pumps and place AUTO r.~a' EOP: ES-1'TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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&#xb9;1 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 t b.Align charging pump suction to RWST: o LCV-112B-OPEN o LCV-112C-CLOSED 2)Ensure HCV-142 open, demand at 0%.b.IF LCV-112B can NOT be opened, THEN perform the following:
EOP ES-1 '
1)Verify charging pump A NOT running and place in PULL STOP..c.Start charging pumps as necessary (75 kw each)and establish 75 gpm total charging flow 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).~Charging line flow~Seal injection flow 1~4E EOP: ES-1'TITLE: POST LOCA C'OQLDQWN AND DEPRESSURIZATION REV: 9 PAGE 6 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Establish Condenser Steam Dump Pressure Control: a.Verify condenser available:
TITLE:
o Any MSIV-OPEN o Annunciator G-15, STEAM DUMP LIT a.Place S/G ARV controllers in AUTO at desired pressure and go to Step 5.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 THAN 5%[25%adverse CNMT]b.Control feed flow to maintain narrow range level between 17%[25%adverse CNMT]and 50%a.Maintain total feed flow greater than 200 gpm until narrow range level greater than 5%[25%adverse CNMT]in at least one S/G.b.IF narrow range level in any S/G continues to increase in an uncontrolled manner, THEN go to E-3, STEAM GENERATOR TUBE RUPTURE, Step l.
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
p lO e mes EOP: ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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 intact S/G(s)c.Manually or locally dump steam using intact S/Gs ARV.7 Check RCS Subcooling Based On Core Exit T/Cs-GREATER THAN O'F USING FIGURE MIN SUBCOOLING Manually operate SI pumps as necessary and go to Step 19.8 Check SI and RHR Pump Status: o SI pumps-ANY RUNNING-OR-Go to Step 15.o RHR pumps-ANY RUNNING IN INJECTION MODE 9 Place PRZR Heater Switches In The Following Positions:
9 PAGE 2 of 23 A.
o PRZR heater control group-PULL STOP o PRZR heater backup group-OFF c.t S~Ii 0>)'t~+
PURPOSE This procedure provides actions to cool down and depressurize the RCS to cold shutdown conditions following a loss of reactor coolant inventory.
EOP: ES-1'TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV'PAGE, 8 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSURIZATION.
B.
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 spray if available a.Depressurize using one PRZR PORV.IF IA NOT available, THEN refer to Attachment N2 PORVS.b.PRZR level-GREATER THAN 13%[40%adverse CNMT]IF no PORV available, THEN use auxiliary spray valve (AOV-296).
ENTRY CONDITIONS/SYMPTOMS 1 ~
b.Continue with Step 11.WHEN level greater than 13%[40%adverse CNMT), THEN stop RCS depressurization.
ENTRY CONDITIONS This procedure is entered from:
c.Stop RCS depressurization CA EOP: ES-1-2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9 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.
E 1 g LOSS OF REACTOR OR SECONDARY COOLANTf when RCS pressure is greater than the shutoff head pressure of the RHR pumps.
11 Check If An RCP Should Be Started: a.Both RCPs-STOPPED b.RCS subcooling based on core exit T/Cs-GREATER THAN O'USING FIGURE MIN SUBCOOLING a.Stop all but one RCP and go to Step 12.b.Go to Step 19.c.PRZR level-GREATER THAN 13%[40%adverse CNMT]d.Try to start an RCP 1)Establish conditions for starting an RCP o Bus llA or llB energized o Refer to Attachment RCP START c.Return to Step 10.d.IF IA to CNMT available, THEN ensure at least one control rod.shroud fan running (45 kw each).2)Start one RCP  
 
~A~~I r EOP: ES-1-2 TIZLE0 POST LOCP, COOLDOWN AND DEPRESSURIZATION REV: 9 PAGE 10 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 12 Check If One Of Three SI Pumps Should Be Stopped: a.Three SI pumps-,RUNNING b.RCS subcooling based on core exit T/Cs-GREATER THAN-35'F[90'F adverse CNMT]USING FIGURE MIN SUBCOOLING c.Check PRZR level-GREATER THAN 13%[40%adverse CNMT]d.Stop one SI pump a.Go to Step 13.b.IF RCS hot leg temperatures greater than 325'F[270'F adverse CNMT]OR IF RHR normal 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.Do NOT stop SI pump.Return to Step 10.  
6 I
%'I~lVE EOP: ES-1.2 TITLE LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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 b.Determine required RCS subcooling from table: a.Go to Step 14.Charging Pump Availability NONE ONE THREE RCS Subcooling Criteria 120'F[200'F adverse CNMT]115'F[190'F adverse CNMT]105'F[180'F adverse CNMT]100'F[175'F adverse CNMT]c.RCS subcooling based on core exit T/Cs-GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.PRZR level-GREATER THAN 13%[40%adverse CNMT)e.Stop one SI pump c.IF RCS hot leg temperatures greater than 325'F[270'F adverse CNMT]OR IF RHR normal 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.Do NOT stop SI pump.Return to Step 10'  
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~~c~f'I 0'tF' EOP: ES-1.2 TITLE: LOCA CPPLDOWN AND DEPRESSURIZATION REV: 9 PAGE 12 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 14 Check If Last SI Pump Should Be Stopped: a.One SI pump-RUNNING b.Determine required RCS subcooling from table: a.IF any RHR pump running in injection mode, THEN go to Step 19.IF NOT, THEN go to Step 15.Charging Pump Availability NONE ONE TWO THREE RCS Subcooling Criteria Insufficient subcooling to stop SI pump.255'F[295'F adverse CNMT]235'F[285'F adverse CNMT]210'F[270'F adverse CNMT]c.RCS subcooling based on core exit T/Cs-GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.PRZR level-GREATER THAN 13%[40%adverse CNMT]e.Stop running SI pump c.IF RCS hot leg temperatures greater than 325'F[270'F adverse CNMT]OR IF RHR normal 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.Do NOT stop SI pump.Return to Step 10.
~
Q>>l I'l 0 I EOP ES-1.2 POST LOCA COOLDONN AND DEPRESSURIZATION REV: 9 PAGE 13 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 15 Check If Charging Flow Should Be Controlled To Maintain PRZR Level: a.Check RHR pumps-RUNNING IN INJECTION MODE b.Go to Step 19 a.'Start charging pump and control charging flow to maintain PRZR level and go to Step 16.*****************************************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:
EOP'S-1 TITLE:
1)Establish conditions for starting an RCP: o Verify Bus 11A or llB energized.
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
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 1p ll i>A 41'st:
9 PAGE 3 of 23 STEP ACTION/EXPECTED RESPONSE
ES-1.2 T!TLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV'PAGE 14 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************
 
CAUTION VOIDING MAY OCCUR IN THE RCS DURING RCS DEPRESSURIZATION.
===RESPONSE===
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:
NOT OBTAINED CAUTION IF RWST LEVEL DECREASES TO LESS THAN 28$,
a.Depressurize using normal PRZR spray if available a.IF normal spray NOT available, THEN use one PRZR PORV.IF IA, NOT available, THEN refer to Attachment N2 PORVS.b.Energize PRZR heaters as necessary c.Depressurize RCS until EITHER of the following conditions satisfied:
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 ENERGIZED BY OFFSITE POWER o
Normal feed breakers to all 480 volt busses CLOSED o
480 bus voltage GREATER THAN 420 VOLTS o
Emergency D/G output breakers OPEN Perform the following:
: a. IF any AC emergency bus normal feed breaker
: open, THEN ensure associated D/G breaker closed.
: b. Perform the following, as necessary:
: 1) Close non-safeguards bus tie 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).
 
'\\
4'.%
k4
\\
Q ~
+gal h
t
 
EOP:
ES-1
~ 2 T!TLF.:
POST LOCA COOZDOWN AND DEPRESSURIZATION REV:
9 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 MANUALLYRESTARTED TO SUPPLY WATER TO THE RCS.
2 Check If RHR Pumps Should Be Stopped:
a.
Check RCS pressure:
: 1) Pressure
- GREATER THAN 250 psig (465 psig adverse CNMT]
: 2) Pressure
- STABLE OR INCREASING a.
Go to Step 3.
: b. Stop RHR pumps and place AUTO
 
r.
~a
 
EOP:
ES-1 '
TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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 &#xb9;1 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
t
: b. Align charging pump suction to RWST:
o LCV-112B -
OPEN o
LCV-112C -
CLOSED
: 2) Ensure HCV-142 open, demand at 0%.
: b. IF LCV-112B can NOT be opened, THEN perform the following:
: 1) Verify charging pump A NOT running and place in PULL STOP.
.c. Start charging pumps as necessary (75 kw each) and establish 75 gpm total charging flow
: 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).
~ Charging line flow
~ Seal injection flow
 
1~
4E
 
EOP:
ES-1 '
TITLE:
POST LOCA C'OQLDQWN AND DEPRESSURIZATION REV:
9 PAGE 6 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 4 Establish Condenser Steam Dump Pressure Control:
: a. Verify condenser available:
o Any MSIV -
OPEN o
Annunciator G-15, STEAM DUMP LIT
: a. Place S/G ARV controllers in AUTO at desired pressure and go to Step 5.
: 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 THAN 5%
[25% adverse CNMT]
: b. Control feed flow to maintain narrow range level between 17%
[25% adverse CNMT] and 50%
: a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5%
[25%
adverse CNMT] in at least one S/G.
: b. IF narrow range level in any S/G continues to increase in an uncontrolled manner, THEN go to E-3, STEAM GENERATOR TUBE
: RUPTURE, Step l.
 
p lO e mes
 
EOP:
ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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 intact S/G(s)
: c. Manually or locally dump steam using intact S/Gs ARV.
7 Check RCS Subcooling Based On Core Exit T/Cs GREATER THAN O'F USING FIGURE MIN SUBCOOLING Manually operate SI pumps as necessary and go to Step 19.
8 Check SI and RHR Pump Status:
o SI pumps
- ANY RUNNING
-OR-Go to Step 15.
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
: c. t S
~Ii 0>)'t~+
 
EOP:
ES-1 '
TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV' 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 spray if available
: a. Depressurize using one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
b.
PRZR level GREATER THAN 13%
[40% adverse CNMT]
IF no PORV available, THEN use auxiliary spray valve (AOV-296).
: b. Continue with Step 11.
WHEN level greater than 13%
[40%
adverse CNMT), THEN stop RCS depressurization.
: c. Stop RCS depressurization
 
CA
 
EOP:
ES-1-2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9
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 If An RCP Should Be Started:
: a. Both RCPs STOPPED b.
RCS subcooling based on core exit T/Cs
- GREATER THAN O' USING FIGURE MIN SUBCOOLING a.
Stop all but one RCP and go to Step 12.
b.
Go to Step 19.
c.
PRZR level GREATER THAN 13%
[40% adverse CNMT]
: d. Try to start an RCP
: 1) Establish conditions for starting an RCP o
Bus llA or llB energized o
Refer to Attachment RCP START
: c. Return to Step 10.
: d. IF IA to CNMT available, THEN ensure at least one control rod
.shroud fan running (45 kw each).
: 2) Start one RCP
 
~A
~ ~ I r
 
EOP:
ES-1-2 TIZLE0 POST
: LOCP, COOLDOWN AND DEPRESSURIZATION REV:
9 PAGE 10 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 12 Check If One Of Three SI Pumps Should Be Stopped:
: a. Three SI pumps
-,RUNNING b.
RCS subcooling based on core exit T/Cs GREATER THAN-35'F
[90'F adverse CNMT] USING FIGURE MIN SUBCOOLING c.
Check PRZR level -
GREATER THAN 13%
[40% adverse CNMT]
: d. Stop one SI pump a.
Go to Step 13.
: b. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.
Do NOT stop SI pump.
Return to Step 10.
 
I
~ l VE
 
EOP:
ES-1.2 TITLE LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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
: b. Determine required RCS subcooling from table:
a.
Go to Step 14.
Charging Pump Availability NONE ONE THREE RCS Subcooling Criteria 120'F [200'F adverse CNMT]
115'F [190'F adverse CNMT]
105'F [180'F adverse CNMT]
100'F [175'F adverse CNMT]
c.
RCS subcooling based on core exit T/Cs GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.
PRZR level
- GREATER THAN 13%
[40% adverse CNMT) e.
Stop one SI pump
: c. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.
Do NOT stop SI pump.
Return to Step 10 '
 
~~c
~ f
'I 0 'tF'
 
EOP:
ES-1.2 TITLE:
LOCA CPPLDOWN AND DEPRESSURIZATION REV:
9 PAGE 12 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 14 Check If Last SI Pump Should Be Stopped:
a.
One SI pump - RUNNING
: b. Determine required RCS subcooling from table:
: a. IF any RHR pump running in injection mode, THEN go to Step 19.
IF NOT, THEN go to Step 15.
Charging Pump Availability NONE ONE TWO THREE RCS Subcooling Criteria Insufficient subcooling to stop SI pump.
255'F [295'F adverse CNMT]
235'F [285'F adverse CNMT]
210'F [270'F adverse CNMT]
c.
RCS subcooling based on core exit T/Cs GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.
PRZR level GREATER THAN 13%
[40% adverse CNMT]
e.
Stop running SI pump
: c. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.
Do NOT stop SI pump.
Return to Step 10.
 
Q>>lI l 0
I
 
EOP ES-1.2 POST LOCA COOLDONN AND DEPRESSURIZATION REV:
9 PAGE 13 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 15 Check If Charging Flow Should Be Controlled To Maintain PRZR Level:
a.
Check RHR pumps
- RUNNING IN INJECTION MODE b.
Go to Step 19 a.'Start charging pump and control charging flow to maintain PRZR level and go to Step 16.
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
 
1p ll i>
A 41'st:
 
ES-1.2 T!TLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV' 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 spray if available
: a. IF normal spray NOT available, THEN use one PRZR PORV.
IF IA, NOT available, THEN refer to Attachment N2 PORVS.
: b. Energize PRZR heaters as necessary
: c. Depressurize RCS until EITHER of the following conditions satisfied:
IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).
IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).
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]
o RCS subcooling based on core exit T/Cs
PI pR" EOP: ES-1.2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9 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-GREATER THAN REQUIREMENTS OF FIGURE SDM b.Borate as necessary.
- LESS THAN 10'F USING FIGURE MIN SUBCOOLING
19 Verify SI Flow Not Required: a.RCS subcooling based on core exit T/Cs-GREATER THAN O'USING FIGURE MIN SUBCOOLING a.Manually operate SI pumps as.necessary and go to Step 20.b.PRZR level-GREATER THAN 5%[30%adverse CNMT)b.Manually operate SI pumps as necessary and return to Step 10.
-OR-o PRZR level GREATER THAN 75%
I E EOP: ES-1.2 POST'LOCA COQLDOWN AND DEPRESSURIZATION REV 9 PAGE 16 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Check If SI ACCUMs Should Be Isolated: a.RCS subcooling based on core exit T/Cs-GREATER THAN O'USING FIGURE MIN SUBCOOLING b.PRZR level-GREATER THAN 5%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~ACCUM A, MOV-841~ACCUM B, MOV-865 a.IF both RCS hot leg temperatures less than 400'F, THEN go to Step 20c.IF NOT, THEN go to Step 21.b.Return to Step 10.d.Vent any unisolated ACCUMs: 1)Open vent valves for unisolated SI ACCUMs.e.Locally reopen breakers for MOV-841 and MOV-865~ACCUM A, AOV-834A~ACCUM B, AOV-834B 2)Open HCV-945.
f65% adverse CNMT]
4,y 45'I~l~
 
EOP: ES-1.2 T!TLE: POST LOCA COOI,DOWN AND DEPRESSURIZATION REV: 9 PAGE 17 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 Check If Emergency D/Gs Should Be Stopped: a.Verify AC emergency busses energized by offsite power: o Emergency D/G output breakers OPEN a.Try to restore offsite power (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).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 RUNNING b.Verify AUX BLDG SW isolation valves-OPEN~MOV-4615 and MOV-4734~MOV-4616 and MOV-4735 a.Manually start pumps as power supply permits (258 kw per pump).IF less than two SW pumps can be operated, THEN go to Step 23.b.Establish SW to AUX BLDG (Refer~to Attachment AUX BLDG SW).c.Verify CNMT RECIRC fan annunciator C-2, HIGH TEMPERATURE ALARM-EXTINGUISHED cd Dispatch AO to locally throttle flow to CCW Hx to between 5000 gpm and 6000 gpm total flow.
PIpR"
fge<<I>>$$'4~g A/K W EOP: ES-1.2 POST LOCA CPPLDPWN AND DEPRESSURIZATION REV: 9 PAGE 18 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 23 Check RCP Cooling a.Check CCW to RCPs Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).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: ES-1'TITLE: LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 PAGE 19 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 24 Check If Seal Return Flow Should Be Established:
EOP:
a.Verify instrument bus D-ENERGIZED b.Verify RCP&#xb9;1 seal outlet temperature
ES-1.2 TITLE:
-LESS THAN 235'F c.Verify RCP seal outlet valves OPEN~AOV-270A~,AOV-270B a.Restore power to instrument bus D from MCC B or MCC A (maintenance supply).b.Go to Step 25.c.Manually open valves as necessary.
POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9
d.Reset both trains of'XY relays for RCP seal return isolation valve MOV-313 e.Open RCP seal return isolation valve MOV-313 f.Verify RCP&#xb9;1 seal leakoff flow LESS THAN 5.5 GPM g.Verify RCP&#xb9;1 seal leakoff flow GREATER THAN 0.25 GPM e.Perform the following:
PAGE 15 of 23 STEP ACTION/EXPECTED RESPONSE
1)Place MOV-313 switch to OPEN.2)Dispatch AO with key to RWST gate to locally open MOV-313.f.IF any RCP seal leakoff flow 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.Refer to AP-RCP.1, RCP SEAL MALFUNCTIONS
 
===RESPONSE===
NOT OBTAINED 18 Verify Adequate Shutdown Margin
: a. Direct HP to sample RCS for boron concentration
: b. Verify boron concentration-GREATER THAN REQUIREMENTS OF FIGURE SDM
: b. Borate as necessary.
19 Verify SI Flow Not Required:
a.
RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING
: a. Manually operate SI pumps as
.necessary and go to Step 20.
b.
PRZR level
- GREATER THAN 5%
[30% adverse CNMT)
: b. Manually operate SI pumps as necessary and return to Step 10.
 
I E
 
EOP:
ES-1.2 POST 'LOCA COQLDOWN AND DEPRESSURIZATION REV 9
PAGE 16 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 20 Check If SI ACCUMs Should Be Isolated:
a.
RCS subcooling based on core exit T/Cs
- GREATER THAN O' USING FIGURE MIN SUBCOOLING b.
PRZR level GREATER THAN 5%
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
~ ACCUM A, MOV-841
~ ACCUM B, MOV-865
: a. IF both RCS hot leg temperatures less than 400'F, THEN go to Step 20c.
IF NOT, THEN go to Step 21.
: b. Return to Step 10.
: d. Vent any unisolated ACCUMs:
: 1) Open vent valves for unisolated SI ACCUMs.
: e. Locally reopen breakers for MOV-841 and MOV-865
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
: 2) Open HCV-945.
 
4,y 45
'I
~l~
 
EOP:
ES-1.2 T!TLE:
POST LOCA COOI,DOWN AND DEPRESSURIZATION REV:
9 PAGE 17 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 21 Check If Emergency D/Gs Should Be Stopped:
: a. Verify AC emergency busses energized by offsite power:
o Emergency D/G output breakers OPEN
: a. Try to restore offsite power (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).
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 RUNNING
: b. Verify AUX BLDG SW isolation valves OPEN
~ MOV-4615 and MOV-4734
~ MOV-4616 and MOV-4735
: a. Manually start pumps as power supply permits (258 kw per pump).
IF less than two SW pumps can be operated, THEN go to Step 23.
: b. Establish SW to AUX BLDG (Refer
~to Attachment AUX BLDG SW).
: c. Verify CNMT RECIRC fan annunciator C-2, HIGH TEMPERATURE ALARM -
EXTINGUISHED cd Dispatch AO to locally throttle flow to CCW Hx to between 5000 gpm and 6000 gpm total flow.


EOP: ES-1~2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 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.
fge
<<I>>
4
~g A/KW
 
EOP:
ES-1.2 POST LOCA CPPLDPWN AND DEPRESSURIZATION REV:
9 PAGE 18 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 23 Check RCP Cooling a.
Check CCW to RCPs Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).
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:
ES-1 '
TITLE:
LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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-ENERGIZED
: b. Verify RCP &#xb9;1 seal outlet temperature LESS THAN 235'F
: c. Verify RCP seal outlet valves OPEN
~ AOV-270A
~,AOV-270B
: a. Restore power to instrument bus D from MCC B or MCC A (maintenance supply).
b.
Go to Step 25.
: c. Manually open valves as necessary.
: d. Reset both trains of'XY relays for RCP seal return isolation valve MOV-313 e.
Open RCP seal return isolation valve MOV-313
: f. Verify RCP &#xb9;1 seal leakoff flow LESS THAN 5.5 GPM
: g. Verify RCP &#xb9;1 seal leakoff flow GREATER THAN 0.25 GPM e.
Perform the following:
: 1) Place MOV-313 switch to OPEN.
: 2) Dispatch AO with key to RWST gate to locally open MOV-313.
: f. IF any RCP seal leakoff flow 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. Refer to AP-RCP.1, RCP SEAL MALFUNCTIONS
 
EOP:
ES-1
~ 2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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 Range Detectors Should Be Energized:
25 Check If Source Range Detectors Should Be Energized:
a.Source range channels DEENERGIZED a.Go to Step 25e.b.Check intermediate range flux-EITHER CHANNEL LESS THAN 10 10 AMPS b..Perform the following:
a.
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:
Source range channels DEENERGIZED a.
o Both intermediate range channels-LESS THAN 10 AMPS c.Continue with Step 26.WHEN either condition met, THEN do Steps 25d and e.-OR-o Greater than 20 minutes since reactor trip d.Verify source range detectors ENERGIZED d.Manually energize source range 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 44~
Go to Step 25e.
EOP: ES-1.2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATZON REV: 9 PAGE 21 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT, OBTAINED 26 Establish Normal Shutdown Alignment:
b.
a.Check condenser-AVAILABLE a.Dispatch AO to perform Attachment SD-2.b.Perform the following:
Check intermediate range flux-EITHER CHANNEL LESS THAN 10 10 AMPS b..Perform the following:
: 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:
o Both intermediate range channels LESS THAN 10 AMPS
: c. Continue with Step 26.
WHEN either condition met, THEN do Steps 25d and e.
-OR-o Greater than 20 minutes since reactor trip
: d. Verify source range detectors ENERGIZED
: d. Manually energize source range 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
 
44 ~
 
EOP:
ES-1.2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATZON REV:
9 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
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 2)Verify at least one control rod shroud fan-RUNNING 1)Go to Step 26d.2)Manually start one fan as power supply permits (45 kw)3)Verify one Rx compartment cooling fan-RUNNING 3)Perform the following:
~ 1G13A71
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-1-COMPLETE  
~ 9X13A73 o
*'1 , P4a EOP: ES-1'TITLE: POST LOCA COOLDONN AND DEPRESSURIZATION REV 9 PAGE 22 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 27 Check If RCPs Must Be Stopped: a.RCPs-ANY RUNNING b.Check the following:
Place voltage regulator to OFF o
o RCP&#xb9;1 seal D/P-LESS THAN 220 PSID a.Go to Step 28.b.Go to Step 28.-OR-o Check RCP seal leakage-LESS THAN 0.25 GPM c.Stop affected RCP(s)28 Check Condenser Steam Dump Available-CONDENSER VACUUM GREATER THAN 20 INCHES HG Use intact S/G ARV for RCS'temperature control.29 Check If RHR Normal Cooling Can Be Established:
Open turbine drain valves o
a.RCS cold leg temperature
Rotate reheater steam supply controller cam to close valves o
-LESS THAN 350'F a.Return to Step 5~" b.RCS pressure-LESS THAN 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)b.Go to Step 30.d.Consult TSC to determine if RHR normal cooling should be established using Attachment RHR COOL  
Place reheater dump valve switches to HAND o
~t/, pi 4P+*It' EOP: ES-1.2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 PAGE 23 of 23 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 30 Check Core Exit T/Cs-LESS THAN 200'F Return to Step 5~31 Evaluate Long Term Plant Status: I a.Maintain cold shutdown conditions b.Consult TSC-END-11 EOP: ES-1'POST LOCA COOLPOWN AND DEPRESSURIZATION REV: 9 PAGE 1 of 1 ES-1.2 APPENDIX LIST TITLE 1)RED PATH  
Stop all but one condensate pump
: c. Verify adequate Rx head cooling:
: 1) Check IA to CNMT - AVAILABLE
: 2) Verify at least one control rod shroud fan RUNNING 1)
Go to Step 26d.
: 2) Manually start one fan as power supply permits (45 kw)
: 3) Verify one Rx compartment cooling fan - RUNNING
: 3) Perform the following:
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-1 COMPLETE
 
*'1
, P4a
 
EOP:
ES-1 '
TITLE:
POST LOCA COOLDONN AND DEPRESSURIZATION REV 9
PAGE 22 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 27 Check If RCPs Must Be Stopped:
a.
RCPs
- ANY RUNNING b.
Check the following:
o RCP &#xb9;1 seal D/P -
LESS THAN 220 PSID a.
Go to Step 28.
b.
Go to Step 28.
-OR-o Check RCP seal leakage LESS THAN 0.25 GPM
: c. Stop affected RCP(s) 28 Check Condenser Steam Dump Available CONDENSER VACUUM GREATER THAN 20 INCHES HG Use intact S/G ARV for RCS
'temperature control.
29 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature LESS THAN 350'F
: a. Return to Step 5
~
" b.
RCS pressure
- LESS THAN 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) b.
Go to Step 30.
: d. Consult TSC to determine if RHR normal cooling should be established using Attachment RHR COOL
 
~ t/,
pi 4P
+*It'
 
EOP:
ES-1.2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 PAGE 23 of 23 STEP ACTION/EXPECTED RESPONSE
 
===RESPONSE===
NOT OBTAINED 30 Check Core Exit T/Cs LESS THAN 200'F Return to Step 5
~
31 Evaluate Long Term Plant Status:
I
: a. Maintain cold shutdown conditions
: b. Consult TSC
-END-
 
11
 
EOP:
ES-1 '
POST LOCA COOLPOWN AND DEPRESSURIZATION REV:
9 PAGE 1 of 1 ES-1.2 APPENDIX LIST TITLE 1)
RED PATH  


==SUMMARY==
==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 PAGES t x~
2)
ES-1'POST LOCA COOLDOWN AND DEPRESSURIZATION REV'PAGE 1 of 1 RED PATH  
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 PAGES
 
t x
~
 
ES-1 '
POST LOCA COOLDOWN AND DEPRESSURIZATION REV' PAGE 1 of 1 RED PATH  


==SUMMARY==
==SUMMARY==
a.SUBCRITICALITY
a.
-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
SUBCRITICALITY Nuclear power greater than 54 b.
-CNMT pressure greater than 60 psig Al 4 I EOP: ES-1.2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE: Subcooling Margin=Saturation Temperature From Figure Below[-]Core Exit T/C Indication S PRESSURE (PSIG)RC 2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 20 RCS PRESSURE INCREHENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION DVERSE CNH TEHPERATURE INCREHENTS 10'F NORHAL CNHT 0 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE
CORE COOLING Core exit T/Cs greater than 1200'F
('F)  
-OR-Core exit T/Cs greater than 700'F AND RVLIS level (no RCPs) less than 434
~4 4y 4 4 I'4~1 t'~44 EOP: ES-1'TITLE:.POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9 PAGE 1 of 1 BORON CONCENTRATION (PPH)1800 FIGURE SDM 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDM 100 PPM CONS ERVATISH INCLUDED80O 600 400 BORA TE 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.
[464 adverse CNMT]
f I I'e 1~~i EOP: ES-1~2 TITLE: POST LOCA COOLDOWN AND DEPRESSURIZATION REV: 9 PAGE 1 of 1 FOLDOUT PAGE SI REINITIATION CRITERIA IF ElTHER condition listed below occurs, THEN manually operate SI pumps as necessary:
c.
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.}}
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
 
Al 4
I
 
EOP:
ES-1.2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication S
PRESSURE (PSIG)
RC 2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0
20 RCS PRESSURE INCREHENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION DVERSE CNH TEHPERATURE INCREHENTS 10'F NORHAL CNHT 0
250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE ('F)
 
~ 4 4y 4
4 I
4
~ 1t'
~44
 
EOP:
ES-1 '
TITLE:
.POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9
PAGE 1 of 1 BORON CONCENTRATION (PPH) 1800 FIGURE SDM 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDM 100 PPM CONS ERVATISH INCLUDED 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:
ES-1
~ 2 TITLE:
POST LOCA COOLDOWN AND DEPRESSURIZATION REV:
9 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.}}

Latest revision as of 10:19, 8 January 2025

Rev 9 to EOP ES-1.2, Post-LOCA Cooldown & Depressurization
ML17262A890
Person / Time
Site: Ginna Constellation icon.png
Issue date: 05/06/1992
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17262A884 List:
References
ES-1.2, NUDOCS 9206160397
Download: ML17262A890 (56)
v • d • e


Text

EOP:

ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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 ES-1 '

TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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 1 g LOSS OF REACTOR OR SECONDARY COOLANTf when RCS pressure is greater than the shutoff head pressure of the RHR pumps.

6 I

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~

EOP'S-1 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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 ENERGIZED BY OFFSITE POWER o

Normal feed breakers to all 480 volt busses CLOSED o

480 bus voltage GREATER THAN 420 VOLTS o

Emergency D/G output breakers OPEN Perform the following:

a. IF any AC emergency bus normal feed breaker
open, THEN ensure associated D/G breaker closed.
b. Perform the following, as necessary:
1) Close non-safeguards bus tie 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:

ES-1

~ 2 T!TLF.:

POST LOCA COOZDOWN AND DEPRESSURIZATION REV:

9 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 MANUALLYRESTARTED TO SUPPLY WATER TO THE RCS.

2 Check If RHR Pumps Should Be Stopped:

a.

Check RCS pressure:

1) Pressure

- GREATER THAN 250 psig (465 psig adverse CNMT]

2) Pressure

- STABLE OR INCREASING a.

Go to Step 3.

b. Stop RHR pumps and place AUTO

r.

~a

EOP:

ES-1 '

TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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

t

b. Align charging pump suction to RWST:

o LCV-112B -

OPEN o

LCV-112C -

CLOSED

2) Ensure HCV-142 open, demand at 0%.
b. IF LCV-112B can NOT be opened, THEN perform the following:
1) Verify charging pump A NOT running and place in PULL STOP.

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

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).

~ Charging line flow

~ Seal injection flow

1~

4E

EOP:

ES-1 '

TITLE:

POST LOCA C'OQLDQWN AND DEPRESSURIZATION REV:

9 PAGE 6 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 4 Establish Condenser Steam Dump Pressure Control:

a. Verify condenser available:

o Any MSIV -

OPEN o

Annunciator G-15, STEAM DUMP LIT

a. Place S/G ARV controllers in AUTO at desired pressure and go to Step 5.
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 THAN 5%

[25% adverse CNMT]

b. Control feed flow to maintain narrow range level between 17%

[25% adverse CNMT] and 50%

a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5%

[25%

adverse CNMT] in at least one S/G.

b. IF narrow range level in any S/G continues to increase in an uncontrolled manner, THEN go to E-3, STEAM GENERATOR TUBE
RUPTURE, Step l.

p lO e mes

EOP:

ES-1.2 POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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 intact S/G(s)

c. Manually or locally dump steam using intact S/Gs ARV.

7 Check RCS Subcooling Based On Core Exit T/Cs GREATER THAN O'F USING FIGURE MIN SUBCOOLING Manually operate SI pumps as necessary and go to Step 19.

8 Check SI and RHR Pump Status:

o SI pumps

- ANY RUNNING

-OR-Go to Step 15.

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

c. t S

~Ii 0>)'t~+

EOP:

ES-1 '

TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV' 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 spray if available
a. Depressurize using one PRZR PORV.

IF IA NOT available, THEN refer to Attachment N2 PORVS.

b.

PRZR level GREATER THAN 13%

[40% adverse CNMT]

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

b. Continue with Step 11.

WHEN level greater than 13%

[40%

adverse CNMT), THEN stop RCS depressurization.

c. Stop RCS depressurization

CA

EOP:

ES-1-2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9

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 If An RCP Should Be Started:

a. Both RCPs STOPPED b.

RCS subcooling based on core exit T/Cs

- GREATER THAN O' USING FIGURE MIN SUBCOOLING a.

Stop all but one RCP and go to Step 12.

b.

Go to Step 19.

c.

PRZR level GREATER THAN 13%

[40% adverse CNMT]

d. Try to start an RCP
1) Establish conditions for starting an RCP o

Bus llA or llB energized o

Refer to Attachment RCP START

c. Return to Step 10.
d. IF IA to CNMT available, THEN ensure at least one control rod

.shroud fan running (45 kw each).

2) Start one RCP

~A

~ ~ I r

EOP:

ES-1-2 TIZLE0 POST

LOCP, COOLDOWN AND DEPRESSURIZATION REV:

9 PAGE 10 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 12 Check If One Of Three SI Pumps Should Be Stopped:

a. Three SI pumps

-,RUNNING b.

RCS subcooling based on core exit T/Cs GREATER THAN-35'F

[90'F adverse CNMT] USING FIGURE MIN SUBCOOLING c.

Check PRZR level -

GREATER THAN 13%

[40% adverse CNMT]

d. Stop one SI pump a.

Go to Step 13.

b. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.

Do NOT stop SI pump.

Return to Step 10.

I

~ l VE

EOP:

ES-1.2 TITLE LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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

b. Determine required RCS subcooling from table:

a.

Go to Step 14.

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

115'F [190'F adverse CNMT]

105'F [180'F adverse CNMT]

100'F [175'F adverse CNMT]

c.

RCS subcooling based on core exit T/Cs GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.

PRZR level

- GREATER THAN 13%

[40% adverse CNMT) e.

Stop one SI pump

c. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.

Do NOT stop SI pump.

Return to Step 10 '

~~c

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'I 0 'tF'

EOP:

ES-1.2 TITLE:

LOCA CPPLDOWN AND DEPRESSURIZATION REV:

9 PAGE 12 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 14 Check If Last SI Pump Should Be Stopped:

a.

One SI pump - RUNNING

b. Determine required RCS subcooling from table:
a. IF any RHR pump running in injection mode, THEN go to Step 19.

IF NOT, THEN go to Step 15.

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

255'F [295'F adverse CNMT]

235'F [285'F adverse CNMT]

210'F [270'F adverse CNMT]

c.

RCS subcooling based on core exit T/Cs GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.

PRZR level GREATER THAN 13%

[40% adverse CNMT]

e.

Stop running SI pump

c. IF RCS hot leg temperatures greater than 325'F [270'F adverse CNMT] OR IF RHR normal 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.

Do NOT stop SI pump.

Return to Step 10.

Q>>lI l 0

I

EOP ES-1.2 POST LOCA COOLDONN AND DEPRESSURIZATION REV:

9 PAGE 13 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 15 Check If Charging Flow Should Be Controlled To Maintain PRZR Level:

a.

Check RHR pumps

- RUNNING IN INJECTION MODE b.

Go to Step 19 a.'Start charging pump and control charging flow to maintain PRZR level and go to Step 16.

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

1p ll i>

A 41'st:

ES-1.2 T!TLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV' 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 spray if available
a. IF normal spray NOT available, THEN use one PRZR PORV.

IF IA, NOT available, THEN refer to Attachment N2 PORVS.

b. Energize PRZR heaters as necessary
c. Depressurize RCS until EITHER of the following conditions satisfied:

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

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]

PIpR"

EOP:

ES-1.2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9

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-GREATER THAN REQUIREMENTS OF FIGURE SDM
b. Borate as necessary.

19 Verify SI Flow Not Required:

a.

RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING

a. Manually operate SI pumps as

.necessary and go to Step 20.

b.

PRZR level

- GREATER THAN 5%

[30% adverse CNMT)

b. Manually operate SI pumps as necessary and return to Step 10.

I E

EOP:

ES-1.2 POST 'LOCA COQLDOWN AND DEPRESSURIZATION REV 9

PAGE 16 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 20 Check If SI ACCUMs Should Be Isolated:

a.

RCS subcooling based on core exit T/Cs

- GREATER THAN O' USING FIGURE MIN SUBCOOLING b.

PRZR level GREATER THAN 5%

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

~ ACCUM A, MOV-841

~ ACCUM B, MOV-865

a. IF both RCS hot leg temperatures less than 400'F, THEN go to Step 20c.

IF NOT, THEN go to Step 21.

b. Return to Step 10.
d. Vent any unisolated ACCUMs:
1) Open vent valves for unisolated SI ACCUMs.
e. Locally reopen breakers for MOV-841 and MOV-865

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

4,y 45

'I

~l~

EOP:

ES-1.2 T!TLE:

POST LOCA COOI,DOWN AND DEPRESSURIZATION REV:

9 PAGE 17 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 21 Check If Emergency D/Gs Should Be Stopped:

a. Verify AC emergency busses energized by offsite power:

o Emergency D/G output breakers OPEN

a. Try to restore offsite power (Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).

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 RUNNING
b. Verify AUX BLDG SW isolation valves OPEN

~ MOV-4615 and MOV-4734

~ MOV-4616 and MOV-4735

a. Manually start pumps as power supply permits (258 kw per pump).

IF less than two SW pumps can be operated, THEN go to Step 23.

b. Establish SW to AUX BLDG (Refer

~to Attachment AUX BLDG SW).

c. Verify CNMT RECIRC fan annunciator C-2, HIGH TEMPERATURE ALARM -

EXTINGUISHED cd Dispatch AO to locally throttle flow to CCW Hx to between 5000 gpm and 6000 gpm total flow.

fge

<>

4

~g A/KW

EOP:

ES-1.2 POST LOCA CPPLDPWN AND DEPRESSURIZATION REV:

9 PAGE 18 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 23 Check RCP Cooling a.

Check CCW to RCPs Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).

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:

ES-1 '

TITLE:

LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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-ENERGIZED
b. Verify RCP ¹1 seal outlet temperature LESS THAN 235'F
c. Verify RCP seal outlet valves OPEN

~ AOV-270A

~,AOV-270B

a. Restore power to instrument bus D from MCC B or MCC A (maintenance supply).

b.

Go to Step 25.

c. Manually open valves as necessary.
d. Reset both trains of'XY relays for RCP seal return isolation valve MOV-313 e.

Open RCP seal return isolation valve MOV-313

f. Verify RCP ¹1 seal leakoff flow LESS THAN 5.5 GPM
g. Verify RCP ¹1 seal leakoff flow GREATER THAN 0.25 GPM e.

Perform the following:

1) Place MOV-313 switch to OPEN.
2) Dispatch AO with key to RWST gate to locally open MOV-313.
f. IF any RCP seal leakoff flow 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. Refer to AP-RCP.1, RCP SEAL MALFUNCTIONS

EOP:

ES-1

~ 2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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 Range Detectors Should Be Energized:

a.

Source range channels DEENERGIZED a.

Go to Step 25e.

b.

Check intermediate range flux-EITHER CHANNEL LESS THAN 10 10 AMPS b..Perform the following:

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:

o Both intermediate range channels LESS THAN 10 AMPS

c. Continue with Step 26.

WHEN either condition met, THEN do Steps 25d and e.

-OR-o Greater than 20 minutes since reactor trip

d. Verify source range detectors ENERGIZED
d. Manually energize source range 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

44 ~

EOP:

ES-1.2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATZON REV:

9 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
2) Verify at least one control rod shroud fan RUNNING 1)

Go to Step 26d.

2) Manually start one fan as power supply permits (45 kw)
3) Verify one Rx compartment cooling fan - RUNNING
3) Perform the following:

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-1 COMPLETE
  • '1

, P4a

EOP:

ES-1 '

TITLE:

POST LOCA COOLDONN AND DEPRESSURIZATION REV 9

PAGE 22 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 27 Check If RCPs Must Be Stopped:

a.

RCPs

- ANY RUNNING b.

Check the following:

o RCP ¹1 seal D/P -

LESS THAN 220 PSID a.

Go to Step 28.

b.

Go to Step 28.

-OR-o Check RCP seal leakage LESS THAN 0.25 GPM

c. Stop affected RCP(s) 28 Check Condenser Steam Dump Available CONDENSER VACUUM GREATER THAN 20 INCHES HG Use intact S/G ARV for RCS

'temperature control.

29 Check If RHR Normal Cooling Can Be Established:

a.

RCS cold leg temperature LESS THAN 350'F

a. Return to Step 5

~

" b.

RCS pressure

- LESS THAN 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) b.

Go to Step 30.

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

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pi 4P

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EOP:

ES-1.2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 PAGE 23 of 23 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 30 Check Core Exit T/Cs LESS THAN 200'F Return to Step 5

~

31 Evaluate Long Term Plant Status:

I

a. Maintain cold shutdown conditions
b. Consult TSC

-END-

11

EOP:

ES-1 '

POST LOCA COOLPOWN AND DEPRESSURIZATION REV:

9 PAGE 1 of 1 ES-1.2 APPENDIX LIST TITLE 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 PAGES

t x

~

ES-1 '

POST LOCA COOLDOWN AND DEPRESSURIZATION REV' 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

Al 4

I

EOP:

ES-1.2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:

Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication S

PRESSURE (PSIG)

RC 2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0

20 RCS PRESSURE INCREHENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION DVERSE CNH TEHPERATURE INCREHENTS 10'F NORHAL CNHT 0

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

~ 4 4y 4

4 I

4

~ 1t'

~44

EOP:

ES-1 '

TITLE:

.POST LOCA COOLDOWN AND DEPRESSURIZATION REV 9

PAGE 1 of 1 BORON CONCENTRATION (PPH) 1800 FIGURE SDM 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDM 100 PPM CONS ERVATISH INCLUDED 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.

f I

I'e 1~

~i

EOP:

ES-1

~ 2 TITLE:

POST LOCA COOLDOWN AND DEPRESSURIZATION REV:

9 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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