ML17263A279
| ML17263A279 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/21/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A278 | List: |
| References | |
| ECA-1.1, NUDOCS 9305140063 | |
| Download: ML17263A279 (64) | |
Text
EOP:
ECA-1;1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 1 of 28 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE
~w 3. 5 cuf PLANT SUPERINTENDENT A3-q3 EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
,9305140063
'930505
~PDR ADOCK 05000244 F,
I E'!
l t
EOP:
ECA-1. 1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 2 of 28 A.
PURPOSE This procedure provides actions to restore emergency coolant recirculation capability, to delay depletion of the EST by adding makeup and reducing outflow, and to depressurize the RCS to minimize break flow.
B.
ENTRY CONDITIONS/SYMPTOMS l.
ENTRY CONDITIONS This procedure is entered from:
a.
E-l, LOSS OF REACTOR OR SECONDARY COOLANT, when cold leg recirculation capability cannot be verified.
b ~
ES 1 ~ 3 g TRANSFER TO COLD LEG RECIRCULATIONg when recirculation cannot be established or maintained.
c ~
ECA 1 ~ 2 g LOCA OUTSIDE CONTAINMENTg when a LOCA outside containment cannot be isolated.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV' PAGE 3 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF EMERGENCY COOLANT RECIRCUIATION 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'OTE:
Adverse CNMT values should be used whenever CNMT ~ressure is greater than 4 psig or CNMT radiation is greater than 10+
R/hr.
1 Verify CNMT Sump Recirculation Capability:
a.
Check RHR system:
o RHR pumps
- OPERABLE o
RHR suction valves from sump B -
- a. 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
CCW pumps
- OPERABLE o
~ MOV-738A
~ MOV-738B b.
Check at least "two SW pumps RUNNING
- b. Manually start SW pumps as power supply permits (258 kw each).
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 4 of 28 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 CAUTION IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE WATER SOURCES FOR AFW PUMPS WILL BE NECESSARY (REFER TO ER-AFW.l, ALTERNATE WATER SUPPLY TO AFW PUMPS).
NOTE:
TDAFW pump flow control valves fail open on loss of IA.
- 3 Monitor 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, THEN stop feed flow to that S/G.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 5 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Shutdown margin should be monitored during RCS cooldown (Refer to Figure SDM).
4 Initiate RCS Cooldown To Cold Shutdown:
- a. Establish and maintain cooldown rate in RCS cold legs
- LESS THAN 100'F/HR b.
Dump steam to condenser from 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 priming air ejector steam supply root valve, V-3578.
- 3) Open 1A and 1B priming air ejector isolation valves.
~ V-3580
~ V-3581 IF no intact S/G available, THEN use faulted S/G.
EOP:
ECA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 6 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5 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
6 Check RWST Level GREATER THAN 154 Go to Step 26.
EOP:
ECA-1.1 TITLE LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 7 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7 Determine CNMT Spray Requirements:
- a. Determine number of CNMT spray pumps required from table:
RWST LEVEL CNMT PRESSURE GREATER THAN 60 PSIG CNMT RECIRC FANS RUNNING CNMT SPRAY PUMPS REQUIRED GREATER THAN 28'ETWEEN 28 PSIG AND 60 PSIG 0
OR 1 2
OR 3
ALL BETWEEN 15'ND28'ESS THAN 28 PSIG GREATER THAN 60 PSIG BETWEEN 28 PSIG AND 60 PSIG LESS THAN 28 PSIG 0,
1, 2, OR 3 ALL LESS THAN 158 b.
CNMT spray pumps running EQUAL TO MINIMUMNUMBER REQUIRED
- b. Manually operate CNMT spray pumps as necessary.
IF CNMT spray pump(s) must be
- stopped, THEN place switch in PULL STOP.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 8 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, THEN SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G.
MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.
8 Reset SI If Necessary 9 Establish One Train Of SI Flow a.
SI pumps
- LESS THAN THREE RUNNING a.
Stop one SI pump.
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 10.
IF no RHR pumps running, THEN start one RHR pump.
10 Verify No Backflow From RWST To Sump:
1 I
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.
Cl
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 9 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED ll 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.
12 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).
IF less than two SW pumps
- running, THEN perform the following:
- 1) Ensure SW isolation.
- 2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-1) 3)
Go to Step 15.
EOP:
ECA-1.1 T1TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 8
PAGE 10 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13 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
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).
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.1, LOSS OF INSTRUMENT AIR).
- 2) Continue with Step 14.
WHEN IA restored, THEN do Steps 13e and f.
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 11 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 14 Establish Required Charging Line Flow:
- a. Charging pumps
- ANY RUNNING a.
Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP ¹1 seal outlet temperature offscale high, THEN dispatch AO with RWST area key to locally close seal injection needle valves to affected RCP:
~ RCP A, V-300A
~ RCP B, V-300B
- b. Establish 20 gpm total charging flow
- 2) Ensure HCV-142 demand at 0%.
- 3) Start one charging pump.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV 8
PAGE 12 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST, THEN THE AFFECTED RCP(S)
SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.
15 Check RCP Status:
a.
RCS subcooling based on core exit T/Cs
- GREATER THAN O' USING FIGURE MIN SUBCOOLING a.
Stop all RCPs and go to Step 16.
b.
- AT LEAST ONE RUNNING
- b. Try to start an RCP:
- 1) Establish conditions for starting an RCP o
Bus 11A or 11B energized o
Refer to Attachment RCP START c.
Stop all but one RCP
- 2) Start one RCP.
C I
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 13 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- 16 Monitor SI Termination Criteria:
a.
RCS subcooling based on core exit T/Cs GREATER THAN 50'F USING FIGURE MIN SUBCOOLING Limit RCS injection flow to that required to remove decay heat:
o Determine required injection
. flow using Figure MIN RCS INJECTION
- b. Check RVLIS indication:
o Level (no RCPs)
GREATER THAN 68%
[73% adverse CNMT]
-OR-o Fluid fraction (any RCP running)
GREATER THAN 80%
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 17.
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 to Step 19.
1
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 14 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Stop SI And RHR Pumps And Place In Auto 18 Verify SI Pump Suction Aligned To RWST:
a.
SI pump suction valves from
'ASTs CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D a.
Ensure at least one valve in each flow path closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D
~ MOV-825A
~ MOV-825B
- b. Ensure at least one valve is open.
- c. Consult TSC to determine if. SI flush is required (Refer to Attachment SI FLUSH) 19 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 infection flow to maintain core exit T/Cs stable or decreasing.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 15 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE: If normal RCP support conditions can NOT be satisfied, then any running RCP(s) should be stopped.
20 Depressurize RCS To Decrease RCS Subcooling:
a.
Check RCS subcooling based on core exit T/Cs GREATER THAN 20'F USING FIGURE MIN SUBCOOLING a.
Go to Step 21.
- b. Normal PRZR spray
-AVAILABLE b.
Use one PRZR PORV.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).
- c. Depressurize RCS until either of the following conditions satisfied:
o RCS subcooling based on core exit T/Cs
- LESS THAN 10'F USING FIGURE MIN SUBCOOLING
-OR-o PRZR level -
GREATER THAN 87%
[75% adverse CNMT]
d.
WHEN either condition met, THEN stop RCS depressurization e.
Check RCS subcooling GREATER THAN O'F USING FIGURE MIN SUBCOOLING
- e. Increase RCS makeup flow as necessary to restore subcooling.
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 16 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check If RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature
- LESS THAN 350'F a.
Go to Step 22.
b.
RCS pressure
- LESS THAN 400 psig [300 psig adverse CNMT)
- c. Place letdown pressure controller (PCV-135) in MANUAL CLOSED b.
Go to Step 22.
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.
- 3) Place AOV-427 switch to OPEN.
- 4) Open one letdown orifice valve.
- e. Verify pressure on PI-135
- LESS THAN 400 PSIG e.
Go to Step 22.
- f. Place RCS overpressure protection system in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV' PAGE 17 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 22 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 cd Close SI'CCUM discharge valves
~ MOV-841
~ MOV-865 a.
Continue with Step 23.
WHEN both RCS. hot leg temperatures less than 400'F, THEN do Steps
- 22b, 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.
23 Check If RCPs Must Be Stopped:
a.
- ANY RUNNING b.
Check the following:
o RCP 51 seal D/P - LESS THAN 220 PSID a.
Go to Step 24.
b.
Go to Step 24.
-OR-o Check RCP seal leakage
- LESS THAN 0.25 GPM
- c. Stop affected RCP(s)
EOP:
ECA-1. 1 TITLE LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 18 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Check Core Exit T/Cs-GREATER THAN 200'F Go to Step 39.
25 Check RWST Level LESS THAN 154 Return to Step 1.
26 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
- 3) Stop running charging pumps.
4)
Go to Step 26e.
c.
Check charging pump suction from c.
Go to Step 26e.
RWST (AOV-112B) -
OPEN
- d. Stop all charging pumps e.
Stop both CNMT spray pumps
- f. Stop both RHR pumps
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 19 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 Check SI pump flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.
CAUTION BAST DILUTION MAY HAVE OCCURRED DURING SI PUMP SUCTION SWAPOVER FROM BASTS TO RWST.
IF DILUTION IS SUSPECTED, BASTS SHOULD BE SAMPLED.
28 Try To Add Makeup To RCS From VCT:
a.
Check VCT level -
GREATER THAN 5%
b..Verify charging pumps aligned to VCT o
LCV-112C -
OPEN o
LCV-112B -
CLOSED a.
Stop charging pumps taking suction from VCT and continue with Step 29.
WHEN VCT level greater than 5%,
THEN do Steps 28b and c.
- b. Manually align valves as necessary.
- c. Start charging pumps as necessary to establish two pumps running
EOP:
ECA-1.1 T1'TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8
'PAGE 20 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 29 Establish Maximum VCT Makeup:
a.
Check RMW control armed RED LIGHT LIT b.
Check VCT level - LESS THAN 20%
cd Check VCT makeup system-OPERATING IN AUTO a.
Place RMW mode switch in AUTO and place RMW control switch to START.
- b. Continue with Step 30.
WHEN VCT level less than 20%,
THEN do Steps
- 29c, d and e.
- c. Perform the following:
1)
Open makeup system valves.
~ AOV-llOB
~ AOV-110C
~ AOV-111
- 2) Start BA transfer pumps and RMW pumps.
- 3) Open boric acid flow control valve (AOV-110A).
- d. Increase VCT makeup flow
- 1) Start both RMW pumps
- 2) Start both boric acid pumps
- 3) Adjust RMW controller (HC-111) in MANUAL to 80 gpm
- 4) Adjust boric acid flow controller (HC-110A) in MANUAL to 9 gpm
- e. Adjust charging pump speed to stabilize VCT level
EOP:
ECA-1.1, LOSS OF EMERGENCY COOLANT RECIRCULATION REV 8
PAGE 21 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 30 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 35.
IF NOT, THEN perform the following:
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C b.
Open SI ACCUM discharge valves.
J
EOP:
ECA-1. 1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 22 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 32 Depressurize All Intact S/Gs To 785 PSIG:
a.
Check S/G pressures"-
GREATER THAN 785 PSIG a.
Go to Step 33.
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 TDAFM 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 32b.
- d. Stop S/G depressurization
EOP:
ECA-1.1 T!TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 23 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
The intent of Step 33 is to depressurize S/Gs more slowly, but at a rate that will maintain required RVLIS level.
33 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:
- 1) Open affected S/G MSIV bypass valve.
- 2) Open priming air e]ector steam isolation valves
~ V-3580
~ V-3581 b.
Check S/G pressures LESS THAN 200 PSIG
- b. Return to Step 33a.
- c. Stop S/G depressurization
1
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 24 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 34 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 35.
WHEN both RCS hot leg temperatures less than 400'F, THEN do Steps
- 34b, 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.
35 Check If RCPs Must Be Stopped:
a.
- ANY RUNNING
- b. Check the following:
o RCP 51 seal D/P LESS THAN 220 PSID a.
Go to Step 37.
b.
Go to Step 37.
-OR-o Check RCP seal leakage
- LESS THAN 0.25 GPM
- c. Stop affected RCP(s)
EOP I ECA-1 '
TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 25 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 36 Check SI Pump Flow STABLE IF SI flow zero or erratic, THEN stop running SI pump.
37 Depressurize All Intact S/Gs To Atmospheric Pressure:
- a. Maintain cooldown rate in RCS cold legs
- LESS THAN 100'F/HR b.
Dump steam to condenser
- b. Manually or locally dump steam from intact S/G(s):
o Use S/G ARVs
-OR-o Open steam supply valves to TDAFW pump
-OR-o Dispatch AO to perform the following:
- 1) Open S/G MSIV bypass valves.
- 2) Open priming air e)ector steam isolation valves
~ V-3580
~ V-3581
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 26 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 38 Check Xf RHR Normal Cooling Can Be Established:
a.
RCS cold leg temperature
- LESS THAN 350'F
- a. Return to Step 36.
b.
RCS pressure LESS THAN 400 psig
[300 psig adverse CNMT]
- c. Place letdown pressure controller in MANUAL CLOSED
~ b. Return to Step 36.
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 37.
- f. Place RCS overpressure protection systeIn in service (Refer to 0-7, ALIGNMENT AND OPERATION OF THE REACTOR VESSEL OVERPRESSURE PROTECTION SYSTEM)
EOP:
ECA-1. 1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 27 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 39 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:
l) 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.
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 28 of 28 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
This procedure should be continued while obtaining CNMT hydrogen sample in Step 40.
40 Check CNMT Hydrogen Concentration:
- b. Hydrogen concentration LESS THAN 0.5%
41 Consult TSC
-END-
EOP:
ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 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-RWST 6)
ATTACHMENT RCP START 7)
ATTACHMENT SD-1 8)
ATTACHMENT CNMT RECIRC FANS 9)
ATTACHMENT RHR SYSTEM 10)
ATTACHMENT N2 PORVS 11)
ATTACHMENT SI FLUSH
EOP:
ECA-1.1 T!TLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 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 ADVERSE CNH NORMAL CNNT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
EOP:
ECA-1.1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 1 of 1 FIGURE S DM NOTE:
o Curve includes allowance for one stuck rod.
Add 100 ppm for.each additional stuck rod.
o To obtain core burnup, use PPCS turn on code BURNUP.
BORON CONCENTRATION (PPH) 1800 1600 BORON INCREMENTS 20 PPH 1400 1200 1000 ADEQUATE SDM 100 PPH CONSERVATISM INCLUDED 800 600 400 BORATE 200 BURNUP INCREMENTS 100 HWD/HTU 0
1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 CYCLE 23 BURNUP (HWD/MTU)
EOP:
ECA-1. 1 TITLE:
LOSS OF EMERGENCY COOLANT RECIRCULATION REV:
8 PAGE 1 of 1 FIGURE MIN RCS INJECTION RE(VIREO INJECTION FLOW RATE (GPH) 350 300 250 200 F50 100 50 INADEQUATE INJECTION FLOW 10 100 1000 TIHE FROH REACTOR TRIP (HINUTES) 10000