ML17261A987
| ML17261A987 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 02/23/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17261A978 | List: |
| References | |
| AP-RHR.1, NUDOCS 9003080337 | |
| Download: ML17261A987 (24) | |
Text
EOP:
AP-RHR.1 TITLE:
LOSS OF RHR REV:
7 PAGE 1 of 8 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE 0
T SUPERIN EN NT 0
EFFECTIVE DATE QA~ NON-QA CATEGORY 1.0 REVIEWED" BY:
8INNASTATION START:
DATE TIME COixpi ETED:
DATE TIME:
900308 5000244 i
r PDR A
- OCN, 5
pNU F
EOP:
AP-RHR. 1 TITLE:
LOSS OF RHR REV:
7 PAGE 2 of 8 A;
PURPOSE This procedure provides guidance in the event of a loss of RHR cooling at or above normal loop levels.
(i.e. at indicated "B" loop levels of 64 inches or greater)
B.
ENTRY CONDITIONS/SYMPTOMS l.
ENTRY CONDITIONS This procedure is entered from; a.
FR-C.3,
RESPONSE
TO SATURATED CORE COOLING, AP CCW 3 ~
LOSS OF CCW PLANT SHUTDOWN 2.
SYMPTOMS The symptoms of (Loss of RHR) are; a.
Annunciator A-20, RESIDUAL HEAT REMOVAL LOOP LO FLOW 2900 GPM (Set at 400 GPM per 0-2.2 in RHR Cooling mode) alarm lit, or b.
Annunciator J-9, SAFEGUARD BREAKER TRIP alarm lit, or c.
Unexpected increase in RCS temperature while on RHR cooling, or d.
Erratic or no flow on FI-626, RHR Loop Flow
0
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AP-RHR.1 1'I TLE:
LOSS OF RHR REV:
7 PAGE 3 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
IF at any time during the performance of this procedure the indicated "B" loop level falls below 64 inches, THEN go to AP-RHR.2, LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS.
1 Check RHR Pumps:
o RHR pumps - AT LEAST ONE RUNNING AND NO TRIP INDICATION IF 2 RHR pumps were running AND 1
has tripped, THEN perform the following:
- a. Ad5ust cooling as necessary.
- b. IF S/G cooling also required, THEN go to Step 9.
IF 1
RHR pump was running AND has
- tripped, THEN start the other RHR pump AND go to Step 15.
IF all available RHR pumps have
- tripped, THEN perform the following:
- a. Reset and attempt to restart 1
RHR pump.
- b. IF RHR pump starts, THEN go to Step 8.
- c. IF RHR cannot be restored, THEN go to Step 9.
CAUTION DO NOT START A SECOND RHR PUMP UNTIL THE CAUSE OF THE ERRATIC FLOW OR LOSS OF FLOW ON THE FIRST PUMP HAS BEEN DETERMINED AND CORRECTED.
2 Check RHR Flow:
o RHR flow - GREATER THAN 200 GPM AND STABLE IF an RHR pump(s) is running with less than 200 gpm flow OR erratic flow is indicated, THEN stop all running RHR pump(s)
AND go to Step 4.
I
'I C,
0 4
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AP-RHR.l LOSS OF RHR REV:
7 PAGE 4 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3 Verify CCW Operation:
o CCW pumps - AT LEAST ONE RUNNING o
CCW to RHR Hxs, MOV-738A AND MOV-738B -
OPEN AS NECESSARY o
CCW temperature and flow alarms
- EXTINGUISHED To Restore CCW to RHR:
o Start the standby CCW pump if it is not running.
o Open MOV-738A AND MOV-738B as necessary.
IF CCW can NOT be restored,
- THEN, continue attempts to restore
- CCW, refer to AP-CCW.3, LOSS OF CCW-PLANT SHUTDOWN, AND go to Step 5.
4 Verify RHR Valve Alignment NORMAL (Refer to Attachment A)
IF RHR valve alignment not normal, THEN stop all running RHR pump(s)
AND align'valves per Attachment A
as required AND start one RHR pump.
5 Check RCS Temperature:
a.
RCS temperature
- STABLE OR DECREASING b.
Go to Step 16
- removed, THEN go to Step 13.
6 Check PRZR Wide Range, Level (LI-433)
GREATER THAN 0 INCHES To restore desired PRZR level, perform the following:
- a. Direct AO to manually open MOV-856 as required.
IF level can NOT be restored quickly enough, THEN manually open MOV-856 from the Control Board.
b.
WHEN desired level obtained, THEN close MOV-856.
1
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AP-RHR.1 LOSS OF RHR REV:
7 PAGE 5 of 8 STEP ACTION/BXPECTED RESPONSE
RESPONSE
NOT OBTAINBD 7 Start At Least 1 RHR Pump:
o RHR pump(s) - RESET BREAKER AND START ONE PUMP IF both RHR pumps will not start, THEN:
o Notify electricians AND go to Step 9.
8 Check RHR Flow:
a.
RHR flow - AS DESIRED AND STABLE b.
Go to Step 15 a.
Go to Step 9.
9 Check RCP Status:
a.
RCP - AT LBAST ONE RUNNING IF NO RCP running, THEN:
- START, AND start one RCP.
b.
Go to Step 10.
IF an RCP cannot be started, THEN verify conditions for Natural Circulation using Attachment NC.
10 Check S/G Status:
o Narrow range level in either S/G
- GREATER THAN 17X
-OR-o AFV flow - AT LBAST 200 GPM AVAILABLB IF S/Gs are not operable THEN:
b.
Go to Step 15.
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AP-RHR.1 TjTLE:
LOSS OF RHR REV 7
PAGE 6 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 11 Establish Condenser Steam Dump:
o Steam dump - ESTABLISHED IF the condenser is NOT available, THEN:
o Dump steam via S/G ARVs.
12 Check RCS Temperature:
a.
RCS temperature
- STABLE OR DECREASING b.
Go to Step 15
- a. IF dumping steam does not provide adequate
- cooling, THEN initiate S/G blowdown from both S/Gs AND maintain both S/G levels stable by controlling AFV flow AND go to Step 15.
13 Check If 1 RHR Loop Is Operable:
a.
RHR pumps
- RUNNING OR START ONE b.
RHR flow - GREATER THAN 200 GPM AND STABLE IF NO RHR loops operable, THEN verify 1 or more containment recirculation fans running AND verify refueling cavity sweep fans running AND place RCDT pumps in operation (Refer to ER-RHR.l, RCDT PUMP OPERATION FOR CORE COOLING).
14 Check Refueling Cavity Level:
- a. Refueling cavity level - GREATER THAN 23 FEET ABOVE Rx VESSEL FLANGE a.
Stop refueling AND increase refueling cavity level to greater than 23 feet (Refer to RF-2D, FILLING THE REFUELING CANAL) AND go to Step 15.
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AP-RHR. 1 TITLE:
LOSS OF RHR REV:
7 PAGE 7 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Verify Maintenance Notified And Continue Attempts To Restore Inoperable RHR Pumps Or RHR Flow:
- a. Maintenance
- NOTIFIED
- b. Attempts continued - TO RESTORE INOPERABLE RHR PUMPS OR FLOV 16 Establish Monitoring Of RCS Temperature:
o RCS temperature
- MONITORING ESTABLISHED 17 Complete NOTIFICATION TO HIGHER SUPERVISION 18 Check Alternatives For Long Term Cooling:
o Long term cooling alternatives-EVALUATED 19 Check For Site Contingency Classification:
o Site contingency classification REFER TO SC-100, GINNA STATION EVENT EVALUATION'AND CLASSIFICATION
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AP-RHR. 1 LOSS OF RHR REV:
7 PAGE 8 of 8 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Check For NRC Reporting Requirements:
o NRC reporting requirements-REFER TO 0-9.3, NRC IMMEDIATE NOTIFICATION 21 Verify RHR Cooling:
a.
RHR cooling normal:
o RHR cooling - RESTORED o
RCS temperature
- STABLE OR DECREASING
- b. Return to REQUIRED PLANT OPERATION
- a. Return to Step l.
-END-
.w
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AP-RHR.1 LOSS OF RHR REV:
7 PAGE 1 of 1 ATTACHMENT A NORMAL RHR COOLING VALVE ALIGNMENT RHR Pump Suction From Loop A Hot Leg..................
MOV-700 Open MOV-701 Open RHR Pump Discharge To Loop B Cold Leg.................
MOV-720 Open MOV-721 Open RHR Letdown to CVCS...................................
HCV-133 RHR Pump Discharge Cross-Connect......................
V-709C V-709D RHR HX Bypass.........................................
V-712A Open Open Open Open V-712B FCV-626 as RHR HX Outlet 1A...................................
HCV-625 as Open desire desire RHR HX Outlet 1B...................................
HCV-624 as desire RHR Pump Suction From RWST............................
MOV-856 Closed RHR Pump Suction Valves A RHR Pump...............................
MOV-704A B RHR Pump...............................
MOV-704B Open Open
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AP-RHR.1 TITLE:
LOSS OF RHR REV:
7 PAGE 1 of 1 ATTACHMENT RCP START A)
The following are prereguisites for starting an RCP:
o RCP oil lift pump running (2 minutes) o RCP oil liftpressure white light LIT B)
In addition, the following conditions should be met prior to starting an RCP:
1)
Both PRZR spray valves closed DEMAND AT 04 2)
CCW in service and aligned to RCP 3)
RCP temperatures normal:
o Seal inlet temperature LESS THAN 135'F o
CCW temperature and flow alarms EXTINGUISHED o
Motor bearing temperatures NORMAL (PPCS - GD RCPS or recorder, if selected) 4)
RCP seal injection in service o
Seal injection flow GREATER THAN 6 gpm o
Labyrinth seal D/P GREATER THAN 15 INCHES OF WATER 5)
RCP Nl seal D/P GREATER THAN 220 psid 6)
RCP oil levels:
o Level alarms EXTINGUISHED o
Level indicators ON SCALE 7)
RCP seal return:
a)
RCP Nl seal outlet valves open:
o AOV-270A for RCP A o
AOV-270B for RCP B
b) c)
NOTE IF MOV-313, seal return isolation,
- open, THEN verify the following:
o VCT pressure GREATER THAN 15 psig o
RCP gl seal leakoff flow BETWEEN 0.25 gpm AND 5.5 GPM o
RCP N2 seal standpipe low level alarm EXTINGUISHED IF MOV-313 closed, THEN verify other RCP N1 seal parameters normal prior to starting an RCP:
o RCP Nl seal inlet temperature o
RCP g1 seal D/P RCP oil lift pump should be stopped after RCP is running.
EOP:
AP-RHR.1 LOSS OF RHR REV:
7 PAGE 1 of' ATTACHMENT NC NOTE: It may take several minutes following initial transient for natural circulation to develop.
The following conditions indicate natural circulation flow:
o RCS subcooling based on core exit T/Cs GREATER THAN REQUIREMENTS OF FIGURE MIN SUBCOOLING o
S/G pressures STABLE OR DECREASING o
Core exit T/Cs STABLE OR DECREASING o
RCS cold leg temperatures AT SATURATION TEMPERATURE FOR S/G PRESSURE The following equipment should be operating to support. natural circulation and cooling:
o Control rod shroud fans o
PRZR heaters (Refer to ER-PRZR.l, RESTORATION OF PRZR HEATERS DURING BLACKOUT) o One Reactor Compartment Cooling Fan
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AP-RHR. 1 t!TLE:
LOSS OF RHR REV:
7 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
20 S
PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION INADEQUATE SUBCOOLING REGION RS 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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