ML17250B106
| ML17250B106 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/09/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17250B096 | List:
|
| References | |
| ECA-.2, ECA-0.2, NUDOCS 9004200661 | |
| Download: ML17250B106 (22) | |
Text
EOP:
ECA-0.2 TITLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 6
PAGE 1 of 8 P
ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERIN EN ENT EFFECTIVE DATE QA +
NON-QA CATEGORY 1.0 REVIEWED BY:
r 9004200bhi 900410
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EOP ECA-0.2 TlTLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 6
PAGE 2 of 8 A.
PURPOSE This procedure provides actions to use engineered safeguards systems to recover plant conditions following restoration of AC emergency power.
B.
ENTRY CONDITIONS/SYMPTOMS l.
ENTRY CONDITIONS This procedure is entered from:
a.
ECA-O.O, LOSS OF ALL AC POWER, when AC emergency power is restored and SI is required.
b.
ECA-0.1, LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED, if SI is required.
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 6
PAGE 3 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o CSFSTs should be monitored for information only.
RR procedures should not be implemented prior to completion of Step 8.
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 RCP CCW Return Valves CLOSED
~ MOV-759A
~ MOV-759B Manually close valves as necessary:
o RCP CCV thermal barrier outlet valves
~ AOV-754A
~ AOV-754B
-OR-o RCP CCV supply valves
~ MOV-749A
~ MOV-749B 2
Check RWST Level GREATER THAN 28<
" Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.
NOTE:
SI actuation to establish safeguards valve alignment is not recommended.
3 Manually Align SI And RHR Pumps To Establish SI Injection:
a.
RHR pump discharge to Rx vessel deluge OPEN
~ MOV-852A
~ MOV-852B
- b. Verify SI pump C discharge valves OPEN
~ MOV-871A
~ MOV-871B a.
Ensure at least one valve open.
- b. Manually open valves as necessary.
l~
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
6 PAGE 4 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4
Manually Align SI Pump Suction:
a.
Check BAST level:
o Level - GREATER THAN 10X o
Annunciator B-23, BORIC ACID TANK LO LO LEVEL-EXTINGUISHED o
Annunciator B-31, BAST TEMP OR LO N2 PRESS
- EXTINGUISHED o
Annunciator K-22, HEAT TRACING SYSTEM - EXTINGUISHED
- b. Verify SI pump suction valves from BAST -
OPEN
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D
- CLOSED MOV-825A
~ MOV-825B
- a. Perform the following:
~ MOV-825A
~ MOV-825B
- 2) Ensure at least one valve in each SI pump suction line from BAST closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D 3)
Go to Step 5.
- b. Ensure both valves in either.
flow path open.
o MOV-826A and MOV-826B
-OR-,
o MOV-826C and MOV-826D
- c. Manually align valves as necessary.
4
EOP:
ECA-0.2 TlTLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
6 PAGE 5 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION THE LOADS PLACED ON THE ENERGIZED AC EMERGENCY BUS SHOULD NOT EXCEED THE CAPACITY OF THE POWER SOURCE.
5 Manually Load Following Safeguards Equipment On AC Emergency Bus:
- a. Start all SI.,pumps a.
Perform the following:
- 1) Start available SI pumps.
o IF SI pump A NOT available, THEN ensure MOV-871B closed.
- b. Check RCS pressure:
o Pressure
- GREATER THAN 250 psig [465 psig adverse CNMT]
o Pressure
- STABLE OR INCREASING o
IF SI pump B NOT available, THEN ensure MOV-871A closed.
- b. Manually start both RHR pumps and go to Step 5d.
- c. Place RHR pump switches in AUTO
- d. Start all available CNMT RECIRC fans
EOP:
ECA-0.2 TITLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
6 PAGE 6 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE WATER SOURCES POR AFW PUMPS WILL BE NECESSARY (REFER TO ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
o IP S/G NR LEVEL DECREASES TO LESS THAN 5X [25X ADVERSE CNMT] AND FEED PLOW IS LESS THAN 200
- GPM, THE MDAPW PUMPS SHOULD BE MANUALLY LOADED ON AC EMERGENCY BUS TO SUPPLY WATER TO THE S/G(S).
- * * * * * * * * * * * * * * * *
- 0' NOTE:
o If MDAPW pump operation is not required, pump switches should be maintained in PULL-STOP to prevent automatic start.
o TDAPW pump flow control valves fail open on loss of IA.
6 Check Intact S/G Levels:
a.
Narrow range level - GREATER, THAN 5X [25% adverse CNMT]
- b. Control feed flow to maintain narrow range level between 17X
[25X adverse CNMT] and 50%
- a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5X [25X adverse CNMT] in at least one S/G.
IP feed flow less than 200 gpm, THEN perform the following:
- 1) Verify MDAFW pump discharge valve to intact S/G(s) open.
~ S/G A, MOV-4007
~ S/G B, MOV-4008
- 2) Manually start MDAPW pumps as necessary (228 KW).
I
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV 6
PAGE 7 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7
Place CNMT Spray Pumps In AUTO 8
Check RCP Seal Injection Needle Valves CLOSED
~ V-300A
~ V-300B Locally close valves before starting charging pump.
CAUTION o
RCP THERMAL BARRIER COOLING SHOULD BE ESTABLISHED SLOWLY TO MINIMIZE POTENTIAL INTRODUCTION OF STEAM INTO THE CCW SYSTEM AND THERMAL SHOCK TO RCP.
o RCP THERMAL BARRIER COOLING SHOULD NOT BE ESTABLISHED TO AN RCP WITH EXCESSIVE SEAL LEAKAGE.
o RCP SEAL INJECTION SHOULD BE ESTABLISHED SLOWLY TO MINIMIZE RCP THERMAL STRESSES AND POTENTIAL SEAL FAILURES.
o AS PART OF SUBSEQUENT RECOVERY ACTIONS, RCP(S)
SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION UNLESS REQUIRED BY AN INADEQUATE CORE COOLING SXTUATION.
NOTE:
FR procedures may nov be implemented as necessary.
o Annunciator A-7, RCP 1A CCW RETURN HIGH TEMP OR LOW FLOW-EXTINGUISHED Establish normal CCW cooling to RCPs (Refer to Attachment SEAL COOLING).
o Annunciator A-15, RCP 1B CCW RETURN HIGH TEMP, OR LOW FLOW-EXTINGUISHED
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
6 PAGE 8 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1
-END-
I 4
r 0
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
6 PAGE 1 of 1 ECA-0.2 APPENDIX LIST TITLE 1)
ATTACHMENT SEAL COOLING PAGES
,I
EOP ECA-0.2 TITLE:
LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
0 PAGE 1 of 2 ATTACHMENT SEAL COOLING IF all RCP seal cooling has been lost, THEN CCW cooling should be restored before establishing seal injection.
A.
Perform the following to restore CCW flow to RCPs:
I)
IF RCP seal injection NOT in service, THEN verify RCP CCW return valves closed.
o MOV-759A o MOV-759B 2)
Verify adequate power available to run one CCW pump (124 kw each pump).
IF power available, THEN start one CCW pump 3)
Ensure MOV-817 OPEN 4)
Open RCP CCW supply valves and thermal barrier return valves for affected RCP:
o MOV-749A and AOV-754A for RCP A o MOV-749B and AOV-754B for RCP B
5)
Restore CCW flow to RCP(s) as follows:
a) IF RCP seal injection in service, THEN ensure RCP CCW return valve(s) open:
o MOV-759A for RCP A o MOV-759B for RCP B
b) IF RCP seal injection NOT established, THEN perform the following:
2)
WHEN normal seal temperature established, THEN manually open valve from control board.
l L-s
EOP:
ECA-0.2 LOSS OF ALL AC POWER RECOVERY WITH SI REQUIRED REV:
0 PAGE 2 of 2 ATTACHMENT SEAL COOLING (cont)
B.
Perform the following to restore RCP seal injection:
Verify RCP gl seal outlet temperatures LESS THAN 235'F IF NOT, THEN consult TSC prior to restoring seal injection.
2)
Verify seal injection valves V300A and V300B are closed.
3)
Verify any charging pump running.
NOTE:
RCP seal cooldown rate should not exceed 1 F/min.
4)
Notify control room to monitor RCP N1 seal outlet temperatures.
5)
Crack open RCP seal injection needle valves, V300A and V300B until minimum flow is established.
6)
Adjust seal injection flow as directed by control room to maintain cooldown rate less than 1'F/min until normal seal injection flow is, established.
P.