ML17262A885
| ML17262A885 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/06/1992 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17262A884 | List: |
| References | |
| ECA-1.1, NUDOCS 9206160385 | |
| Download: ML17262A885 (132) | |
Text
EOP:
ECA-1.1 T1TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 1 of 27 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT EFF CTI E DATE CATEGORY 1.0 REVIEWED BY:
V 9206160385 920605 PDR ADOCK 05000244 PDR
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 2 of 27 PURPOSE This procedure provides actions to restore emergency coolant recirculation capability, to delay depletion of the RHsT by adding makeup and reducing outflow, and to depressurize the RCS to minimize break flow.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
E-1, LOSS OF REACTOR OR SECONDARY COOLANT/
when cold leg recirculation capability cannot be verified.
b ~
ES 1 ~ 3 g TRANSFER TO COLD LEG REC IRCULATION/
when recirculation cannot be established or maintained.
c ~
ECA 1 2 g LOCA OUTSIDE CONTAINMENTg when a
LOCA outside containment cannot be isolated.
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 7
PAGE 3 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF EMERGENCY COOLANT RECIRCULATION CAPABILITY IS RESTORED DURING THIS PROCEDURE, FURTHER RECOVERY ACTIONS SHOULD CONTINUE BY RETURNING TO PROCEDURE AND STEP IN EFFECT.
o IF SUCTION SOURCE IS LOST TO ANY SI OR CNMT SPRAY PUMP, THE PUMP SHOULD BE STOPPED.
- * * * * * * * * * * * * * * * * *
- g * * * * * * * * * * * * * * * * * * * *
- NOTE:
Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+"
R/hr.
1 Check If Emergency Coolant Recirculation Equipment Available:
o RHR pumps
- OPERABLE o
RHR suction valves from sump B
OPERABLE Manually or locally try to restore at least one train (Refer to Attachment RHR SYSTEM to identify minimum components for one train).
~ MOV-850A
~ MOV-850B o
RHR pump discharge to Rx vessel deluge valves
- OPERABLE
~ MOV-852A
~ MOV-852B o
~ MOV-738A
~ MOV-738B
e1
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ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV!
7 PAGE 4 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2
Add Makeup To RWST As Necessary o
Refer to S-9J, BLENDING TO RWST
-OR-o Refer to S-3.2D, TRANSFERRING WATER FROM CVCS HUT(S)
-OR-o Refer to Attachment SFP-RWST
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ECA-1.1 TITLE:
.LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 5 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Shutdown margin should be monitored during RCS cooldown (Refer to Figure SDM)
~
3 Initiate RCS Cooldown To Cold Shutdown:
- a. Establish and maintain cooldown rate in RCS cold legs
- LESS
'THAN 100'F/HR b.
Dump steam to condenser from intact S/G(s)
- b. Manually or locally dump steam from intact S/G(s):
o Use S/G ARVs
-OR-o Open TDAFW pump steam supply valves.
-OR-o Dispatch AO to perform the following:
- 1) Open S/G MSIV bypass valves.
- 2) Open 1A and 1B priming air ejector isolation valves.
~ V-3580
~ V-3581 IF no intact S/G available, THEN use faulted S/G.
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ECA-F 1 TlTLE LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 6 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Verify CNMT RECIRC Fans Running:
- a. All fans
- RUNNING
- b. Charcoal filter dampers green status lights - EXTINGUISHED
- a. Manually start fans.
- b. Dispatch personnel with relay rack key to locally open dampers using trip relay pushbuttons in relay room racks.
~ AUX RELAY RACK RA-2 for fan A
~ AUX RELAY RACK RA-3 for fan C
5 Check RWST Level GREATER THAN 15%
Go to Step 25.
~
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ECA-1.1 TlTLE LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 7 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Determine CNMT Spray Requirements:
- a. Determine number of CNMT spray pumps required from table:
RWST LEVEL CNMT PRESSURE GREATER THAN 60 PSIG CNMT RECIRC FANS RUNNING CNMT SPRAY PUMPS REQUIRED GREATER THAN 28%
OR 1 2
OR 3
ALL LESS THAN 28 PSIG BETWEEN 15@
AND 28'REATER THAN 60 PSIG BETWEEN 28 PSIG AND 60 PSIG LESS THAN 28 PSIG 0, 1, 2>
OR 3
ALL LESS THAN 15'.
CNMT spray pumps running EQUAL TO MINIMUM NUMBER REQUIRED
- b. Manually operate CNMT spray pumps as necessary.
IF CNMT spray pump(s) must be
- stopped, THEN place switch in PULL STOP.
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 8 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G.
MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.
7 Reset SI If Necessary 8 Establish One Train Of SI Flow a.
SI pumps LESS THAN THREE RUNNING a.
Stop one SI pumps b.
RCS pressure LESS THAN 250 psig
[465 psig adverse CNMT]
c.
RHR pump
- ONLY ONE RUNNING
- b. Stop RHR pumps and go to Step, 9.
IF no RHR pumps running, THEN start one RHR pump.
9 Verify No Backflow From RWST To Sump:
a.
Any RHR suction valve from sump B -
OPEN
~ MOV-850A
~ MOV-850B
b.
RWST outlet valve to RHR pump suction (MOV-856) -
CLOSED
- b. Manually close valve.
IF valve can NOT be closed
- manually, THEN direct AO to locally close valve.
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ECA-1 '
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 7
PAGE 9 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Reset CI:
a.
Depress CI reset pushbutton
- b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED b, Perform the following:
- 1) Reset SI.
- 2) Depress CI reset pushbutton.
11 Verify Adequate SW Flow:
a.
Check at least two SW pumps RUNNING
- a. Manually start SW pumps as power supply permits (258 kw each).
IF less than two SW pumps
- running, THEN perform the following:
- 1) Ensure SW isolation.
- 2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)
- b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1) 3)
Go to Step 14.
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ECA-1. 1 TITLE:
, LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 10 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Establish IA to CNMT:
- a. Verify non-safeguards busses energized from offsite power o
Bus 13 normal feed - CLOSED
-OR-o Bus 15 normal feed CLOSED
- b. Verify SW isolation valves to turbine building -
OPEN
~ MOV-4613 and MOV-4670
~ MOV-4614 and MOV-4664
- c. Verify at least two air compressors
- RUNNING d.
Check IA supply:
o Pressure
- GREATER THAN 60 PSIG o
Pressure STABLE OR INCREASING
Perform the following:
- 1) Close non-safeguards bus tie breakers:
~ Bus 13 to Bus 14 tie
~ Bus 15 to Bus 16 tie
- 2) Verify adequate emergency D/G capacity to run 'air compressors (75 kw each).
IF NOT, THEN evaluate if CNMT RECIRC fans should be stopped (Refer to Attachment CNMT RECIRC FANS).
3)
WHEN bus 15 restored, THEN reset control room lighting.
- b. Manually align valves.
- c. Manually start air compressors as power supply permits (75 kw each).
IF air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.
- d. Perform the following:
- 1) Continue attempts to restore IA (Refer to AP-IA.l, LOSS OF INSTRUMENT AIR).
- 2) Continue with Step 14.
WHEN IA restored, THEN do Steps 12e and f.
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ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 11 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13 Establish Required Charging Line Flow:
- a. Charging pumps
- ANY RUNNING a.
Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP ¹1 seal outlet temperature offscale high, THEN dispatch AO with RWST area key to locally close seal injection needle valves to affected RCP:
- b. Establish 20 gpm total charging flow
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 demand at 0%.
- 3) Start one charging pumps
~ 1
~ MWC
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 7
PAGE 12 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF SEAL COOLING HAD PREVIOUSLY BEEN LOST, THE AFFECTED RCP(S)
SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.
14 Check RCP Status:
a.
RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING a.
Stop all RCPs and go to Step 15.
b, RCPs
- AT LEAST ONE RUNNING
- b. Try to start an RCP:
- 1) Establish conditions for starting an RCP o
Bus llA or 11B energized o
Refer to Attachment RCP START
- c. Stop all but one RCP
- 2) Start one RCP.
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 13 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Check If SI Can Be Terminated:
a.
RCS subcooling based on core exit T/Cs GREATER THAN 50'F USING FIGURE MIN SUBCOOLING b.
Check RVLIS indication:
o Level (no RCPs)
GREATER THAN 68%
[73% adverse CNMT]
-OR-o Fluid fraction (any RCP running)
GREATER THAN 80%
Limit RCS injection flow to that required to remove decay heat:
o Determine required injection flow using Figure MIN RCS INJECTION o
Stop SI pumps as necessary to establish and maintain minimum required SI flow.
o IF required injection flow is less than 100 gpm, THEN establish required charging flow and go to Step 16.
IF required injection flow is greater than 100 gpm, THEN perform the following:
a.
Ensure one SI pump running
- b. Establish minimum charging flow for RCP seal injection.
(Locked valve key required.)
- d. Go'o Step 18.
16 Stop SI And RHR Pumps And Place In Auto
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ECA-1. 1 T!TLE:
LOSS OF EMERGENCY COOLANT RECIRCULAT1ON REV:
7 PAGE 14 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Verify SI Pump Suction Aligned To RHST:
a.
SI pump suction valves from BASTs CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D
~ MOV-825A
~ MOV-825B a.
Ensure at least one valve in each flow path closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D
- b. Ensure at least one valve is open.
- c. Consult TSC to determine if SI flush is required (Refer to Attachment SI FLUSH) 18 Verify Adequate RCS Makeup Flow:
a.
Check RVLIS indication:
o Level (no RCPs)
- GREATER THAN 68%
[73% adverse CNMT]
-OR-o Fluid fraction (any RCP running)
GREATER THAN 80%
b.
Core exit T/Cs
- STABLE OR DECREASING
- b. Increase RCS injection flow to maintain core exit T/Cs stable or decreasing.
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ECA-1. 1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 7
PAGE 15 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 19 Depressurize RCS To Decrease RCS Subcooling:
a.
Check RCS subcooling based on core exit T/Cs
- GREATER THAN 20'F USING FIGURE MIN SUBCOOLING b.
Use normal.PRZR spray a.
Go to Step 20.
- b. IF normal spray NOT available, THEN use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
- 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 87%
[75% adverse CNMT)
- d. Stop RCS depressurization
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 16 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature LESS THAN 350'F a.
Go to Step 21.
b, RCS pressure LESS THAN 400 psig
[300 psig adverse CNMT]
- c. Place letdown pressure controller in MANUAL CLOSED b.
Go to Step 21.
d.
Check following valves OPEN
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
~ At least one letdown orifice valve (AOV-200A, AOV-200B, or AOV-202)
- d. Perform the following:
- 1) Reset both trains of XY relays for AOV-371 and AOV-427
')
Open AOV-371 and AOV-427.
- 3) Open one letdown orifice valve.
- e. Verify pressure on PI-135 LESS THAN 400 PSIG e.
Go to Step 21.
- f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
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ECA-1.1 T11LE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 17 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check If SI ACCUMs Should Be Isolated:
a.
Both RCS hot leg temperatures LESS THAN 400'F
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C
- c. Close SI ACCUM discharge valves
~ MOV-841
~ MOV-865 a.
Continue with Step 22.
WHEN both RCS hot leg temperatures less than 400'F, THEN do Steps
- 21b, c and d.
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs.
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- d. Locally reopen breakers for MOV-841 and MOV-865
- 2) Open HCV-945.
22 Check If RCPs Must Be Stopped:
a.
- ANY RUNNING b.
Check the following:
o RCP ¹1 seal D/P -
LESS THAN 220 PSID a.
Go to Step 23.
b.
Go to Step 23.
-OR-o Check RCP seal leakage LESS THAN 0.25 GPM
- c. Stop affected RCP(s)
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ECA-l.l TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REVS 7
PAGE 18 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 23 Check Core Exit T/Cs-GREATER THAN 200'F Go to Step 38.
24 Check RWST Level LESS THAN 154 Return to Step 1
~
25 Minimize RWST Outflow:
a.
Any SI pump(s)
- RUNNING
- a. IF charging pump suction aligned to RWST, THEN perform the following:
- 2) Start one SI pump and verify flow.
- b. Stop all but one SI pump c.
Check charging pump suction from RWST (AOV-112B)
OPEN
- 3) Stop running charging pumps.
4)
Go to Step 25e.
c.
Go to Step 25e.
d.
Stop all charging pumps e.
Stop both CNMT spray pumps
- f. Stop both RHR pumps 26 Check SI pump flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.
Ct rt
- 1 %
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 19 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION BAST DILUTION MAY HAVE OCCURRED DURING SI PUMP SUCTION SWAPOVER FROM BASTS TO RWST.
IF DILUTION IS SUSPECTED, BASTS SHOULD BE SAMPLED.
27 Try To Add Makeup To RCS From VCT:
a.
Check VCT level GREATER THAN 5%
a.
Stop charging pumps taking suction from VCT and continue with Step 28.
WHEN VCT level greater than 5%,
THEN do Steps 27b and c.
- b. Verify charging pumps aligned to VCT o
LCV-112C -
OPEN o
LCV-112B -
CLOSED
- b. Manually align valves as necessary.
- c. Start charging pumps as necessary to establish two pumps running
4Q" ml
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ECA-1.1 TITLE:
,LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 20 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 28 Establish Maximum VCT Makeup:
a.
Check RMW control armed RED LIGHT LIT a.
Place RMW mode switch in AUTO and place RMW control switch to START.
b.
Check VCT level -
LESS THAN 20%
c.
Check VCT makeup system-OPERATING IN AUTO
- b. Continue with Step 29.
WHEN VCT level less than 20%,
THEN do Steps
- 28c, d and e.
- c. Perform the following:
- 1) Open makeup system valves.
~ AOV-110B
~ AOV-110C
~ AOV-ill
- d. Increase VCT makeup flow
- 1) Start both RMW pumps
- 2) Start both boric acid pumps
- 3) Adjust RMW controller (HC-111) in MANUAL to 80 gpm
- 4) Adjust boric acid flow controller (HC-110A) in MANUAL to 9 gpm
- e. Adjust charging pump speed to stabilize VCT level
- 2) Start BA transfer pumps and RMW pumps.
- 3) Open boric acid flow control valve (AOV-110A).
- 5'
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ECA-1.1 LOSS OF EMERGENCY, COOLANT RECIRCULATION REV:
7 PAGE 21 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 29 Try To Add Makeup To RCS From Alternate Source:
~ MOV-841
~ MOV-865 IF valves were closed to prevent SI ACCUM nitrogen injection, THEN go to Step 34.
IF NOT, THEN perform the following:
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C b.
Open SI ACCUM discharge valves.
4IIP,+,
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 22 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 31 Depressurize All Intact S/Gs To 785 PSIG:
a.
Check S/G pressures GREATER THAN 785 PSIG a.
Go to Step 32.
b.
Dump steam to condenser at maximum rate
- b. Manually or locally dump steam at maximum rate from intact S/G(s):
o Use S/G ARVs
-OR-o Open steam supply valves to TDAFW pump
-OR-o Dispatch AO to perform the following:
- 1) Open S/G MSIV bypass
- valves,
- 2) Open priming air ejector steam isolation valves
~ V-3580
~ V-3581 c.
Check S/G pressures LESS THAN 785 PSIG
- c. Return to Step 31b.
d.
Stop S/G depressurization
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 23 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
The intent of Step 32 is to depressurize S/Gs more slowly, but at a rate that will maintain required RVLIS level.
32 Depressurize Intact S/Gs To 200 PSIG Slowly To Inject SI ACCUMs:
a.
Dump steam to condenser as necessary to maintain appropriate RVLIS indication:
o Level (no RCPs)
BETWEEN 68%
AND 73%
[73% AND 76% adverse CNMT]
-OR-o Fluid fraction (any RCP running)
BETWEEN 80%
AND 90%
- a. Manually or locally dump steam from intact S/G(s) to maintain appropriate RVLIS indication:
o Use S/G ARVs
-OR-o Open steam supply valves to TDAFW pump
-OR-o Dispatch AO to perform the following:
l) Open affected S/G MSIV bypass valve.
- 2) Open priming air ejector steam isolation valves
~ V-3580
~ V-3581 b.
Check S/G pressures LESS THAN 200 PSIG
- b. Return to Step 32a.
cd Stop S/G depressurization
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 24 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 33 Check If SI ACCUMs Should Be Isolated:
- a. Both RCS hot leg temperatures LESS THAN 400'F
- a. Continue with Step 34.
WHEN both RCS hot leg temperatures less than 400'F, THEN do Steps
- 33b, c and d.
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C I
- c. Close SI ACCUM discharge valves
~ MOV-841
~ MOV-865
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs.
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- d. Locally reopen breakers for MOV-841 and MOV-865
- 2) Open HCV-945.
34 Check If RCPs Must Be Stopped:
a.
- ANY RUNNING b.
Check the following:
o RCP ¹1 seal D/P -
LESS THAN 220 PSID a.
Go to Step 36.
b.
Go to Step 36
'OR-o Check RCP seal leakage LESS THAN 0.25 GPM
- c. Stop affected RCP(s)
'I
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ECA-1.1 TITLE:
. LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 25 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 35 Check SI Pump Flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.
36 Depressurize All Intact S/Gs.
To Atmospheric Pressure:
- a. Maintain cooldown rate in RCS
'cold legs LESS THAN 100'F/HR b.
Dump steam to condenser
- b. Manually or locally dump steam from intact S/G(s):
o Use S/G ARVs
-OR-o Open steam supply valves to TDAFW pump
-OR-o Dispatch AO to perform the following:
1)'pen S/G MSIV bypass valves.
- 2) Open priming air ejector steam isolation valves
~ V-3580
~ V-3581
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ECA-1. 1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 26 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 37 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature LESS THAN 350'F
- a. Return to Step 35.
b.
RCS pressure
- LESS THAN 400 psig
[300 psig adverse CNMT]
- c. Place letdown pressure controller in MANUAL CLOSED
- b. Return to Step 35.
d.
Check following valves OPEN
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
~ At least one letdown orifice valve (AOV-200A, AOV-200B, or AOV-202)
- d. Perform the following:
- 1) Reset both trains of XY relays for AOV-371 and AOV-427.
- 2) Open AOV-371 and AOV-427.
- 3) Open one letdown orifice valve.
- e. Verify pressure on PI-135 LESS THAN 400 PSIG
- e. Return to Step 36.
- f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
- + ~
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV' PAGE 27 of 27 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 38 Maintain RCS Heat Removal:
a.
Use RHR system if in service b.
Dump steam to condenser from intact S/Gs
- b. Manually or locally dump steam from intact S/G(s):
o Use S/G ARVs
-OR-o Open steam supply valves to TDAFW pump
-OR-o Dispatch AO to perform the following:
- 1) Open S/G MSIV bypass valves.
- 2) Open priming air ejector steam isolation valves
~ V-3580
~ V-3581 IF no intact S/G available and RHR system NOT in service, THEN use faulted S/G.
39 Consult TSC
-END-
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ECA-1.1, TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV: '7 PAGE 1 of 1 ECA-1-1 APPENDIX LIST TITLE PAGES 1)
FIGURE MIN SUBCOOLING 2)
FIGURE SDM 3)
FIGURE MIN RCS INJECTION 4)
ATTACHMENT RHR COOL 5)
ATTACHMENT SFP-EST I')
ATTACHMENT RCP START 7)
ATTACHMENT SD-1 8)
ATTACHMENT CNMT RECIRC FANS 9)
ATTACHMENT RHR SYSTEM 10)
ATTACHMENT N2 PORVS 11)
ATTACHMENT SI FLUSH
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ECA-1.1 T1TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 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 INCREMENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION DVERSE CNM TEMPERATURE INCREMENTS 10'F NORMAL CNMT 0
250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
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ECA-1.1 T1TLF.:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 1 of 1 BORON CONCENTRATION (PPH) 1800 FIGURE SDM 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDM 100 PPM CONSERVATISH INCLUDED 800 600 400 BOR TE 200 BURNUP INCREMENTS 100 HWD/HTU 0
1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 CYCLE 22 BURNUP (HWD/HTU)
NOTE: To obtain core burnup, use PPCS turn on code BURNUP.
I
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ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
7 PAGE 1 of 1 FIGURE MIN RCS INJECTION RE(URI ED INJECTION FLOW RATE (G PH) 350 300 250 200 150 100 50 INADE(UATE INJECTION FLOW 10 100 1000 TINE FROM REACTOR TRIP (MINUTES) 10000
EOP ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV' PAGE 1 of 31 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERINTEN EN q/
E ECT VE DATE CATEGORY 1.0 REVIEWED BY:
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ECA-F 1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 2 of 31 A.
B.
PURPOSE This procedure provides actions to mitigate and minimize a loss of secondary coolant from both steam generators.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
E-2, FAULTED STEAM GENERATOR ISOLATION, when an uncontrolled depressurization of both steam generators occurs.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 3 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- * * * * * * * * * * *
- 0' CAUTION o
IP ANY S/G PRESSURE INCREASES AT ANY TIME DURING THIS PROCEDURE, THEN E-2, FAULTED STEAM GENERATOR ISOLATION, SHOULD BE PERPORMED.
o WHEN BAST LEVEL DECREASES TO 10%,
THEN SI PUMP AUTOMATIC SWITCHOVER TO RWST SHOULD BE ENSURED.
o IP THE TDAFW PUMP IS THE ONLY AVAILABLESOURCE OF FEED PLOW, THEN STEAM SUPPLY TO THE TDAFW PUMP MUST BE MAINTAINED FROM ONE S/G.
NOTE:
o FOLDOUT page should be open AND monitored periodically.
o Conditions should be evaluated for Site Contingency Reporting (Refer to EPIP 1-0, GINNA STATION EVENT EVALUATION AND CLASSIFICATION).
o Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10
~ R/hr.
1 Check Secondary Pressure Boundary:
o MSIVs -
CLOSED o
MFW flow control valves CLOSED
~
MPW regulating valves
~
MPW bypass valves o
MFW pump discharge valves-CLOSED o
S/G blowdown and sample valves CLOSED o
TDAFW pump steam supply valves PULL STOP o
TDAFW pump flow control valves CLOSED o
S/G ARVs -
CLOSED o
Dispatch AO to locally isolate S/Gs (Refer to Attachment FAULTED S/G)
Manually close valves one loop at a time.
, IP valves can NOT be closed, THEN dispatch AO to~ocally isolate flowpaths, as necessary, one loop at a time.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV *6 PAGE 4 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION A MINIMUM FEED PLOW OF 50 GPM MUST BE MAINTAINEDTO EACH S/G VITH A NARROV RANGE LEVEL LESS THAN 5% [25% ADVERSE CNMT].
2 Control Feed Flow To Minimize RCS Cooldown:
a.
Check cooldown rate in RCS cold legs - LESS THAN 100'P/HR
- b. Check narrow range level in both S/Gs - LESS THAN 50%
a.
Decrease feed flow to 50 gpm to each S/G and go to Step 2c.
- b. Control feed flow to maintain narrow range level less than 50%
in both S/Gs.
- c. Control feed flow or dump steam to stabilize RCS hot leg temperatures.
3 Check If RCPs Should Be Stopped:
a.
RCP status
- ANY RCP RUNNING
- b. SI pumps
- AT LEAST TWO RUNNING c.
RCS pressure minus maximum S/G pressure LESS THAN 175 psig
[400 psig adverse CNMT]
- d. Stop both RCPs a.
Go to Step 4.
b.
Go to Step 4.
c.
Go to Step 4.
4 Check CST Level GREATER THAN 5 FEET Switch to alternate APW suction supply (Refer to ER-AFV.1, ALTERNATE VATER SUPPLY TO AFW PUMPS).
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 5 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF ANY PRZR'ORV OPENS BECAUSE OF HIGH PRZR PRESSURE, IT SHOULD BE CLOSED AFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 5B).
5 Check PRZR PORVs And Block Valves:
a.
Power to PORV block valves-AVAILABLE b.
PORVs - CLOSED
- c. Block valves - AT LEAST ONE OPEN
- a. Restore power to block valves unless block valve was closed to isolate an open PORV:
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C
- b. IF PRZR pressure less than 2335 psig, THEN manually close PORVs.
IF any PORV can NOT be closed, THEN manually close its block valve.
IF block valve can NOT be closed, THEN dispatch AO to locally check breaker.
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C c.
Open one block valve unless it was closed to isolate an open PORV.
4~6 OA X
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF -BOTH STEAM GENERATORS REV:
6 PAGE 6 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Check Secondary Radiation Levels NORMAL o
Steamline radiation monitor (R-31 and R-32) o Dispatch AO to locally check steamline radiation Go to E-3, STEAM GENERATOR TUBE
- RUPTURE, Step l.
o Request HP sample S/Gs for activity CAUTION o
RCS PRESS SHOULD BE MONITORED.
IR RCS PRESS DECREASES TO LESS THAN
~
~
250 PSIG [465 PSIG ADVERSE CNMT], THE RHR PUMPS MUST BE MANUALLYRESTARTED TO SUPPLY WATER TO THE RCS.
o IR ORRSITE POVER IS LOST ARTER SI RESET, SELECTED SV PUMPS AND ONE CCW PUMP VILL AUTO START ON EMERGENCY D/G.
MANUAL ACTION WILL BE REQUIRED TO RESTART SAREGUARDS EQUIPMENT.
7 Reset SI 8
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 1)
Go to E-l, LOSS OR REACTOR OR SECONDARY COOLANT, Step 1.
2)
Go to Step, 9.
- b. Stop RHR pumps and place in AUTO
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 7 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9
Check If CNMT Spray Should Be Shopped:
a.
CNMT spray pumps - RUNNING
- b. Verify CNMT pressure
- LESS THAN 4 PSIG
- c. Reset CNMT spray
- d. Check NaOH tank outlet valves-CLOSED
~ AOV-836A
~ AOV-836B a.
Go to Step 10.
- b. Continue with Step 10.
@HEN CNMT pressure less than 4 psig, THEN do Steps 9c through f.
- d. Place NaOH tank outlet valve controllers to MANUAL and close valves.
~ AOV-836A
~ AOV-836B e.
Stop CNMT spray pumps and place in AUTO
- f. Close CNMT spray pump discharge valves
~ MOV-860A
~ MOV-860B
~ MOV-860C
~ MOV-860D 10 Check RWST Level GREATER THAN 28~a Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 8 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED ll Check If SI ACCUMs Should Be Isolated:
a.
Both RCS hot leg temperatures-LESS THAN 400'P a.
Go to Step 12.
~ MOV-841, MCC C position 12P
+. MOV-865, MCC D position 12C
- c. Close SI ACCUM discharge valves
~ MOV-841
~ MOV-865
- d. Locally reopen breakers for MOV-841 and MOV-865
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs,
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- 2) Open HCV-945.
12 Reset CI:
a.
Depress CI reset pushbutton
- b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED
- b. Perform the following:
- 1) Reset SI.
- 2) Depress CI reset pushbutton.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 9 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13 Verify Adequate SW Flow:
a.
Check at least two SW pumps-RUNNING
- b. Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1)
- a. Manually start SW pumps as power supply permits (258 kw each).
IP less than two SW pumps
- running, THEN perform the following:
- 1) Ensure SW isolation.
- 2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1) 3)
Go to Step 15.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION ADF BOTH STEAM GENERATORS REV:
6 PAGE 10 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 14 Establish IA to CNMT:
- a. Verify non-safeguards busses energized from offsite power o
Bus 13 normal feed - CLOSED
-OR-o Bus 15 normal feed - CLOSED
- b. Verify SV isolation valves to turbine building -
OPEN
~ MOV-4613 and MOV-4670
~ MOV-4614 and MOV-4664
- c. Verify at least two air
'ompressors
- RUNNING d.. Check IA supply:
o Pressure
- GREATER THAN 60 PSIG o
Pressure
- STABLE OR INCREASING
OPEN
- a. Perform the following:
- 1) Close non-safeguards bus tie breakers:
~ Bus 13 to Bus 14 tie
~ Bus 15 to Bus 16 tie
- 2) Verify adequate emergency D/G capacity to run air compressors (75 kw each).
IP NOT, THEN evaluate if CNMT RECIRC fans should be stopped (Refer to Attachment CNMT RECIRC PANS).
3)
VHRN bus 15 restored, THEN reset control room lighting.
- b. Manually align valves.
- c. Manually start air compressors as power supply permits (75 kw each).
IP air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.
- d. Perform the following:
- 1) Continue attempts to restore IA (Refer to AP-IA.1, LOSS OF INSTRUMENT AIR).
- 2) Continue with Step 15.
VHEN IA restored, THEN do Steps 14e and f.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 11 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Check Normal Power Available To Charging Pumps:
o Bus 14 normal feed breaker-CLOSED o
Bus 16 normal feed breaker-CLOSED Verify adequate emergency D/G capacity to run charging pumps (75 kv each).
IP NOT, THEN evaluate if CNMT RECIRC fans can be stopped (Refer to Attachment CNMT= RECIRC PANS).
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 12 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 16 Check If Charging Flow Has Been Established:
- a. Charging pumps
- ANY RUNNING
- b. Align charging pump suction to RWST:
o LCV-112B -
OPEN o
LCV-112C - CLOSED
- a. Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP gl seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to close seal injection needle valve(s) to affected RCP:
~ RCP A, V-300A
~ RCP B, V-300B.
- 2) Ensure HCV-142 open, demand at OX.
- 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 and adjust charging flow to restore PRZR level
- 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).
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EOP ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 13 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Check-If SI Should Be Terminated:
a.
Check RCS pressure:
o Pressure
- GREATER THAN 1625 psig
[1825 psig adverse CNMT]
o Pressure
- STABLE OR INCREASING b.
RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING a.
DO NOT stop SI pumps.
Perform the following:
- 1) Energize PRZR heaters and operate PRZR spray as necessary to stabilize RCS pressure greater than 1625 psig [1825 psig adverse CNMT]
- 2) Return to Step 2.
b.
DO NOT stop SI pumps.
Return to Step 2.
c.
PRZR level - GREATER THAN 5%
[30% adverse CNMT]
c.
Do NOT stop SI pumps.
Perform the following:
- 1) IF normal PRZR spray available, THEN try to stabilize RCS pressure with PRZR spray.
- 2) Return to Step 17a.
18 Stop SI and RHR Pumps And Place In Auto
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 14 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 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 return to Step 2.
b.
PRZR level - GREATER THAN 5%
[30% adverse CNMT]
- b. Control charging flow to maintain PRZR level.
IF PRZR level can NOT be maintained, THEN manually operate SI pumps as necessary and return to Step 2.
CAUTION ALIGNING SI PUMP SUCTION TO RWST BEFORE ISOLATING BAST MAY RESULT IN BACKFLOW FROM RWST TO BASTS.
20 Verify SI Pump Suction Aligned To RWST:
a.
SI pump suction valves from BASTs -
CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D
OPEN
~ MOV-825A
~ MOV-825B
- a. Manually close at least one valve in each flow path.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D IF either flowpath can NOT be manually isolated, THEN dispatch AO to isolate flowpath locally.
- b. Ensure at least one valve is open.
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ECA-2.1 Z!TLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV' PAGE 15 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check RCS Hot Leg Temperatures STABLE OR DECREASING Control feed flow or dump steam to stabilize RCS hot leg temperatures.
22 Check Narrow Range Level In Both S/Gs LESS THAN 504 Control feed flow to maintain narrow range level less than 50X in both S/Gs.
23 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).
IP less than two SW pumps can be operated, THEN go to Step 30.
- c. Verify CNMT RECIRC fan
. annunciator C-2, HIGH TEMPERATURE ALARM - EXTINGUISHED
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ECA-F 1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 16 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Check If Normal CVCS Operation Can Be Established
- a. Verify IA restored:
OPEN o
IA pressure
- GREATER THAN 60 PSIG
- a. Continue with Step 30.
WHEN IA
- restored, THEN do Steps 24 through 29.
- b. Verify instrument bus D-ENERGIZED c.
CCW pumps - ANY RUNNING
- d. Charging pump - ANY RUNNING
- b. Energize MCC B.
IP MCC B NOT available, THEN perform the following:
- 1) Verify MCC A energized.
- 2) Place instrument bus D on maintenance supply.
- c. Perform the following:
- 1) IP any RCP fl seal outlet temperature offscale high, THEN isolate CCW to thermal barrier of affected RCP(s).
~ RCP A, MOV-749A and MOV-759A
~ RCP B, MOV-749B and MOV-759B
- 2) Manually start one CCW pump.
d: Continue with Step 30.
WHEN any charging pump running, THEN do Steps 25 through 29.
1 I
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 17 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 25 Check If Seal Return Flow Should Be Established:
- a. Verify RCP IIIl seal outlet temperature
- LESS THAN 235'P
- b. Verify RCP seal outlet valves-OPEN
~ AOV-270A
~ AOV-270B a.
Go to Step 28.
- b. Manually open valves as necessary.
- c. Reset both trains of XY relays for RCP seal return isolation valve MOV-313 d.
Open RCP seal return isolation valve MOV-313
- e. Verify RCP tl seal leakoff flow
- LESS THAN 5.5 GPM
- f. Verify RCP fl seal leakoff flow
- GREATER THAN 0.25 GPM
- d. Perform the following:
- 1) Place MOV-313 switch to OPEN.
- e. IP 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 IP both RCP seal discharge valves are shut, THEN go to Step 27.
- f. Refer to AP-RCP.l, RCP SEAL MALPUNCTION.
26 Verify PRZR Level GREATER THAN 13%
[404 adverse CNMT]
Continue with Step 28.
WHEN PRZR level increases to greater than 13%
[40% adverse CNMT], THEN do Step 27.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 18 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 Establish Normal Letdown:
- a. Verify charging line flow to REGEN Hx - GREATER THAN 20 GPM
- b. Place the following switches to CLOSE:
~ Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202)
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
- c. Place letdovn controllers in MANUAL at 25% open
~ TCV-130
~ PCV-135
- d. Reset both trains of XY relays for AOV-371 and AOV-427 e.
Open AOV-371 and AOV-427
- f. Open letdown orifice valves as necessary
- g. Place TCV-130 in AUTO at 105'F
- h. Place PCV-135 in AUTO at 250 psig
- i. Adjust charging pump speed and HCV-142 as necessary IF RCP seal return has been established, THEN establish excess letdown as follovs:
o Place excess letdown divert
- valve, AOV-312, to NORMAL.
o Ensure CCW from excess letdovn
- open, (AOV-745).
o Open excess letdovn isolation valve AOV-310.
o Slovly open HCV-123 to maintain excess letdovn temperature less than 195'F and pressure less than 100 psig.
o Adjust charging pump speed as necessary.
IF RCP seal return NOT established,
'THEN consult TSC to determine if excess letdown should be placed in service.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 19 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 28 Check VCT Makeup System:
a.
BAST levels - ANY GREATER THAN 5X b.
Check Annunciator B-23, BORIC ACID TANK LO LO LEVEL-EXTINGUISHED a.
Go to Step 29.
- b. Perform the folloving:
- 1) Adjust boric acid flow control valve to required flow from table.
BAST LEVEL
<10%
10-15%
15-20%
>20%
BORIC ACID PLOW (GPM) 4.5 6.7 8.9 10.0
- c. Adjust boric acid flov control valve in AUTO to 4.5 gpm
- d. Verify the folloving:
1)
RMW mode selector switch in AUTO 2)
Go to Step 28d.
- d. Adjust controls as necessary.
2)
RMW control armed - RED LIGHT LIT e.
Check VCT level:
o Level - GREATER THAN 20X
-OR-o Level - STABLE OR INCREASING
- e. Manually increase VCT makeup flow as follows:
- 1) Ensure BA transfer pumps and RMD pumps running.
Tp NOT, TMMN reset MCC C and MCC D UV lockouts as necessary.
- 2) Place RMW flow control valve HCV-ill in MANUAL and increase RMW flov.
- 3) Increase boric acid flow as necessary.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 20 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 29 Check Charging Pump Suction Aligned To VCT:
a.
VCT level - GREATER THAN 20%
- b. Verify charging pumps aligned to VCT:
o LCV-112C -
OPEN o
LCV-112B - CLOSED
- a. IF VCT level can NOT be maintained greater than 5%,
THEN perform the following:
- 1) Ensure charging pump suction aligned to RWST o
LCV-112B open o
LCV-112C closed
- 2) Continue with Step 30.
WHEN VCT level greater than 40%,
THEN do Step 29b.
- b. Manually align valves as necessary.
NOTE:
o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.
o When using PRZR PORV, select one with an operable block valve.
30 Energize Heaters And Operate Normal Spray As Necessary To Maintain RCS Pressure Stable IF normal spray NOT available and letdown.is in service, THEN use auxiliary spray valve.(AOV-296).
IF PRZR spray NOT available, THEN use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
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ECA-2.1 TlTLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 21 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
~ 31 Check RCP Cooling:
a.
Establish normal cooling to RCPs (Refer to Attachment SEAL COOLING).
o Annunciator A-7, RCP lA CCW RETURN HIGH TEMP OR LOW PLOW EXTINGUISHED o
Annunciator A-15, RCP 1B CCW RETURN HIGH TEMP OR LOW PLOW EXTINGUISHED
- b. Check RCP seal injection:
o Labyrinth seal D/Ps - GREATER THAN 15 INCHES OP WATER
-OR-o RCP seal injection flov to each RCP - GREATER THAN 6 GPM
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 22 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 32 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
.nec'essary:
- 1) Close non-safeguards bus tie breakers:
~ Bus 13 to Bus 14 tie
~ Bus 15 to Bus 16 tie
- 2) Place the follows.ng 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)
%HEN 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 POVER).
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 23 of 31 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.
33 Check RCP Status AT LEAST ONE RUNNING Try to start one RCP:
- a. Establish conditions for starting an RCP.
o Bus llA or 11B energized o
Refer to Attachment RCP START.
- b. Start one RCP.
IF an RCP can NOT be started, THEN verify natural circulation (Refer to Attachment NC).
IF natural circulation can NOT be
- verified, THEN increase feed flow or dumping steam.
44 g!
l x
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ECA-F 1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 24 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Adverse CNMT conditions or loss of forced air cooling may result in failure of NIS detectors.
34 Check If Source Range Detectors Should Be Energized:
a.
Source range channels-DEENERGIZED a.
Go to Step 34e.
- b. Check intermediate range flux-EITHER CHANNEL LESS THAN 1O-o AMPS
- b. Perform the following:
- 1) IF neither intermediate range channel is decreasing THEN initiate boration.
c.
Check the following:
o Both intermediate range channels
- LESS THAN 10-'MPS
- 2) Continue with Step 35.
WHEN
~
flux is LESS THAN 10-'mps on any operable
- channel, THEN do Steps
- 34c, d and e.
- c. Continue with step 35.
WHEN either condition met, THEN do Steps 34d and e.
-OR-o Greater than 20 minutes since reactor trip
- d. Verify source range detectors.-
ENERGIZED
- e. Transfer Rk-45 recorder to one source range and one intermediate range channel.
- 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.l, SR MALFUNCTION and go to Step 35.
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ECA-2. 1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 25 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 35 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.l, 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)
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 26 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 36 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 OPP 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:
- 2) Verify at least one control rod shroud fan - RUNNING
- 3) Verify one Rx compartment cooling fan - RUNNING
- d. Verify Attachment SD COMPLETE 1)
Go to Step 37.
- 2) Manually start one fan as power supply permits (45 kw)
- 3) Perform the following:
o Dispatch AO to reset UV relays at MCC C and MCC D.
o Manually start one fan as power supply permits (23 kw)
"Y I
fJ II
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ECA-2.1 TjTLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 27 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 37 Maintain Plant Conditions STABLE Control plant systems as necessary to maintain conditions stable.
o RCS pressure o
PRZR level o
RCS temperatures 38 Verify SI Flow Not Required:
a.
RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING b.
PRZR level - GREATER THAN 5X
[30X adverse CNMT]
- a. Manually operate SI pumps as necessary.
Return to Step 2.
- b. Control charging flow to maintain PRZR level.
IF PRZR level can NOT be maintained, THEN manually operate SI pumps as necessary.
Return to Step 2.
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ECA-2. 1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 28 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 39 Check If SI ACCUMs Should Be Isolated:
a.
Check the following:
o RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING a.
Go to Step 40.
o PRZR level - GREATER THAN 5%
[30% adverse CNMT]
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C
- c. Close SI,ACCUM discharge valves
~ MOV-841
~ MOV-865
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs.
- d. Locally reopen breakers for MOV-841 and MOV-865
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- 2) Open HCV-945.
40 Check RCS Hot Leg Control feed flow and dump steam to Temperatures LESS THAN 350'F establish RCS cooldown rate less than 100'F/hr in RCS cold legs.
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 29 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.
o When using PRZR PORV, select one with operable block valve.
41 Check RCS Pressure LESS THAN 400 PSIG
[300 PSIG adverse CNMT]
Use normal PRZR spray.
IF normal spray NOT available and letdown is in service, THEN use auxiliary spray.
IF NOT, THEN use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
Al
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ECA-2.1 TITLE:
UNCONTROLLED DEPEESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 30 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 42 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature
- LESS THAN 350'F
- a. Return to Step 38.
b.
RCS pressure
- LESS THAN 400 psig '[300 psig adverse CNMT]
- c. Place letdown pressure controller (PCV-135) in MANUAL CLOSED
- b. Return to Step 41.
- d. Check following valves - OPEN
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
~ At least one letdown orifice valve (AOV-200A, AOV-200B, or AOV-202)
- e. Verify pressure on PI-135 - LESS THAN 400 PSIG
- d. Perform the following:
- 1) Reset both trains of XY relays for AOV-371 and AOV-427.
- 2) Open AOV-371 and AOV-427.
- 3) Open one letdown orifice valve.
- e. Return to Step 41.
- f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
- f. IF RCS overpressure protection system can NOT be placed in
0
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 31 of 31 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 43 Continue RCS Cooldown To Cold Shutdown:
- a. Maintain cooldown rate in RCS cold legs - LESS THAN 100'F/HR
- b. Check narrow range level in both S/Gs - LESS THAN 50%
- b. Control feed flow to maintain narrow range level less than 50%
in both S/Gs.
44 Check Core Exit T/Cs LESS THAN 200'F Return to Step 43.
45 Evaluate Long Term Plant Status:
- a. Maintain cold shutdown conditions
- b. Consult TSC
-END-
4 II eV rl
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TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 1 of 1
ECA-2. 1 APPENDIX LIST TITLE PAGES 1)
RED PATH
SUMMARY
2)
FIGURE MIN SUBCOOLING 3)
ATTACHMENT FAULTED S/G 4)
ATTACHMENT CNMT RECIRC FANS 5)
ATTACHMENT NC 6)
ATTACHMENT RCP START 7)
ATTACHMENT N2 PORVS 8)
ATTACHMENT SEAL COOLING 9)
ATTACHMENT SI/UV 10)
ATTACHMENT D/G STOP 11)
ATTACHMENT SD-1 12)
ATTACHMENT SD-2 13)
ATTACHMENT RHR COOL 14)
ATTACHMENT AUX BLDG SW 15)
ATTACHMENT SI FLUSH 16)
FOLDOUT 2
~
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 1 of 1 RED PATH
SUMMARY
a.
SUBCRITICALITY Nuclear power greater than 5%
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%
[25~o 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
4 l>>,
J le kg C
SIC g
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV:
6 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication 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
S PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION ADVERS NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'P 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('P)
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ECA-2.1 TITLE:
UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS REV 6
PAGE 1 of 1 FOLDOUT PAGE 1.
SI REINITIATION CRITERIA Manually operate SI pumps as necessary if EITHER condition listed below occurs:
o RCS subcooling based on core exit TCs LESS THAN 0 F USING REQUIREMENTS OF FIGURE MIN SUBCOOLING o
PRZR level CHARGING CAN NOT CONTROL LEVEL GREATER THAN 5w
[30~o ADVERSE CNMT]
2.
E-2 TRANSITION CRITERIA IF any S/G pressure increases at any time, THEN go to E-2, FAULTED STEAM GENERATOR ISOLATION, Step 1.
3.
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 1.
4.
AFW SUPPLY SWITCHOVER CRITERION IF CST level decreases to less than 5 feet, THEN switch to alternate AFW water supply (Refer to ER-AFW.l, ALTERNATE WATER SUPPLY TO AFW PUMPS).
5.
SI PUMP AUTO SWITCHOVER CRITERION WHEN BAST level decreases to 10%,
THEN ensure SI pump automatic switchover to RWST.
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