ML17261A979
| ML17261A979 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 02/23/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17261A978 | List: |
| References | |
| AP-ELEC.1, NUDOCS 9003080328 | |
| Download: ML17261A979 (28) | |
Text
EOP:
AP-ELEC. 1 TITLE:
LOSS OF g12A OR 12B TRANSFORMER REV:
6 PAGE 1 of 12 ROCHESTER GAS AND ELECTRIC C
PORATION GINNA STATION CONTROLLED COPY NUNBE TECHNICAL VIEW ~ Q
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6 INNASTATION START:
DATE IMF COMPLETED:
DATE TIME'oaS0SOSZS e00227 PDR ADOCK 0500024 F
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AP-ELEC. 1 LOSS OF N12A OR 12B TRANSFORMER REV:
6 PAGE 2 of 12 A.
PURPOSE This procedure provides actions to respond to a loss of N12 SS Transformer.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of loss of N12 SS Transformer are:
a.
Annunciator,L-20, 12A XFMR OR 12A BUS TROUBLE ALARM lit, or c.
Annunciator L-28, 12B XFMR OR 12B BUS TROUBLE ALARM lit.
EOP:
AP-ELEC. 1 TITLE:
LOSS OF N12A OR 12B TRANSFORMER REV 6
PAGE 3 of 12 STBP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF AT ANY TIME DURING THIS PROCEDURE A REACTOR TRIP OR SI IS REQUIRED, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
NOTE:
Steps 1 through 3 are IMMEDIATE ACTION steps.
O 1
Verify BOTH EMERGENCY D/Gs START I
IP one OR both emergency D/Gs do not start, THEN refer to ER-D/G.l, RESTORATION OF A PAILED D/G.
O 2
Verify Power To Both Trains Of Safeguards Busses:
o Bus 14 AND Bus 18 - GREATBR THAN 420 VOLTS
-AND-o Bus 16 AND Bus 17 - GREATER THAN 420 VOLTS Try to restore pover to all AC emergency busses.
IP pover can NOT be restored to at least one train, THEN go to ECA-O.O, LOSS OP ALL AC
- POWER, Step 1.
O 3
Verify Service Water System Operation:
a.
SW pumps - AT LBAST ONE RUNNING IN EACH LOOP b.
- GREATER THAN 40 PSIG IN EACH LOOP
- a. Manually start pumps as necessary.
(260 KW each)
- b. Manually align valves as necessary.
4
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AP-ELEC. 1 T1TLE:
LOSS OF N12A OR 12B TRANSFORMER REV0 6
PAGE 4 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Verify CCW Pump Operation:
- a. At least one CCV pump - RUNNING
- a. Start one CCV pump (120 kw).
- b. Start second CCV pump (120 kw).
5 Establish Appropriate Steps Of This Procedure To Be Performed:
IR turbine generator is tripped, THEN go to Step 12.
o Turbine generator ON LINE 6
Check S/G Level CONTROLLING Place MRV regulating valves in IN AUTO MANUAL and control feed flow as required.
7 Establish Charging Flow:
a.
Check D/G loading - LESS THAN 1875 KV
- b. Start -
ONE CHARGING PUMP (75 KV each)
- c. Ad]ust charging flow and HCV-142 as necessary
- TO MAINTAINRCP LABYRINTH SEAL D/P GREATER THAN 15 INCHES H20 AND PRESSURIZER LEVEL GREATER THAN 13X a.
Shed sufficient non-essential loads to provide adequate D/G capacity for charging pumps (75 KV each).
l.
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AP-ELEC.1 TITLE:
LOSS OF N12A OR 12B TRANSFORMER REV:
6 PAGE 5 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Verify Letdown In Service:
o Letdown flow - APPROXIMATELY 40 GPM o
Letdown pressure
- APPROXIMATELY 250 PSIG IF letdown is isolated, THEN:
- a. Adjust charging pump speed and HCV-142 to establish greater than 20 GPM charging line flow to REGEN Hx.
- b. Verify letdown isolation valve AOV-371 is open.
- c. Place letdown orifice valves to close (AOV-200A, AOV-200B, AOV-202).
- d. Place letdown controllers TCV-130 and PCV-135 in manual'at 25X.
e.
Open loop B cold leg to REGEN Hx AOV-427.
- f. Open on 40 GPM letdown orifice isolation valve.
- g. Place TCV;130 in AUTO at approximately 105'F.
- h. Place PCV-135 in AUTO at 250 psig.
- i. Adjust charging pump speed and HCV-142 as necessary.
EOP:
AP-ELEC. 1 LOSS OF N12A OR 12B TRANSFORMER REV:
6 PAGE 6 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
OBSERVE D/G LOADING LIMITS OF 2300 KV FOR 1/2 HOUR, 2250 KV FOR 2 HOURS, AND 1950 KV FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POVBR TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVBILLANCE OF THE D/GS.
9 Establish That PRZR Proportional Heaters Are Operable:
a.
PRZR heater control group switch
- RBSBT IF proportional heaters inoperable, THEN energize PRZR backup heaters as necessary.
- b. Breaker - RECLOSED 10 Check IF CNMT Recirc Fan Required:
a.
CNMT temperature
- LESS THAN 125'F AND STABLB OR DECRBASING (PPCS GROUP DISPLAY TCV)
- a. Start one CNMT recirc fan as D/G loading permits (240 KV each fan).
NOTE:
Power operation may continue if conditions required by Tech Spec section 3.7 are met.
11 Establish CLOSE MONITORING OF PLANT CONDITIONS~
AND GO TO STEP 23
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AP-ELEC. 1 LOSS OF g12A OR 12B TRANSFORMER REV 6
PAGE 7 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Verify AFW Pumps Running:
a.
MDAFV pumps - RUNNING VITH PROPER DISCHARGE PRESSURE AND FLOV
- a. Start MDAFW pumps (230 KV each).
b.
TDAFV pump - RUNNING VITH PROPER
- b. Start TDAFV pump.
DISCHARGE PRESSURE AND FLOV NOTE:
Attempts to restore offsite pover should continue, (Refer to ER-ELEC.1, RESTORATION OF. OFFSITE POVER).
13 Verify Natural Circulation Per Attachment NC
AP-ELEC. 1 LOSS OF N12A OR 12B TRANSFORMER REV 6
PAGE 8 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2 HOUR, 2250 KW FOR 2 HOURS, AND 1950 KW POR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OP THE D/GS.
14 Establish 480 Volt Non-Safeguards Busses Energization As Follows:
- a. Dispatch an AO to verify - ALL LOADS ON BUSSES 13 AND 15 ARE STRIPPED
- a. Operate local trip mechanisms as necessary to strip all loads.
- b. Close bus 13 - bus 14 tie breaker - TIE BREAKER CLOSED
- c. Close bus 15 - bus 16 tie breaker
- TIE BREAKER CLOSED
- d. Close MCC lA breaker - BREAKER CLOSED
- e. Close MCC 1B breaker.-
BREAKER CLOSED
- f. Close MCC 1E breaker - BREAKER CLOSED
- g. Close MCC 1F breaker - BREAKER CLOSED
- h. Close MCC 1G1 or 1G2 breaker-BREAKER CLOSED
- b. IF breaker can NOT be closed, THEN notify electricians.
- c. IF breaker can NOT be closed, THEN notify electricians.
- d. IF breaker can NOT be closed, THEN notify electricians.
- e. IF breaker can NOT be closed, THEN notify electricians.
- f. IP breaker can NOT be closed, THEN notify electricians.
- g. IP breaker can NOT be closed, THEN notify electricians.
- h. IP breaker can NOT be closed, THEN notify electricians.
A
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AP-ELEC.1 TITLE:
LOSS OF N12A OR 12B TRANSFORMER REV 6
PAGE 9 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Establish IA:
- a. Start - 2 IA compressors as D/G loading permits (100 KW per compressor)
- b. Verify IA pressure
- GREATER THAN 100 PSIG IF IA can NOT be established, THEN refer to AP-IA.1, LOSS OF INSTRUMENT AIR.
16 Verify Instrument Bus 1D-ENERGIZED IF instrument bus 1D NOT energized, THEN svitch instrument bus 1D to maintenance supply.
17 Establish Charging Flow:
a.
Check D/G loading - LESS THAN 1875 KW
- b. Start -
ONE CHARGING PUMP (75 KW each)
- c. Adjust charging flov and HCV-142 as necessary
- TO MAINTAINRCP LABYRINTH SEAL D/P GREATER THAN 15 INCHES H20 AND PRESSURIZER LEVEL GREATER THAN 13X'.
Shed sufficient non-essential loads to provide adequate D/G capacity for charging pumps (75 KW each).
EOP:
AP-ELEC.1 LOSS OF 512A OR 12B TRANSFORMER REV 6
PAGE 10 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Verify Letdown In Service:
o Letdown flow - APPROXIMATELY 40 GPM IF letdown is isolated, THEN:
- a. Bstablish charging line flow to REGEN Hx greater than 20 GPM.
o Letdown pressure
- APPROXIMATELY
- b. Place letdown orifice valve 250 PSIG switches to close.
- c. Place low press LTDN press PCV-135 in manual at 25X open.
- d. Increase PRZR level to greater than 13X.
- e. Verify LTDN loop B cold leg to RHx AOV-427 and LTDN isol vlv RHx to NRHx AOV-371 open.
- f. Open letdown orifice valve AOV-200A or 'AOV-200B.
- g. Ad)ust PCV-135 for 250 psig and place in AUTO.
NOTE:
PRZR heaters should be restored within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of initiation of natural circulation.
19 Restore PRZR heaters:
o PRZR heaters
- RESTORED (Refer to BR-PRZR.l, RBSTORATION OF PRZR HBATBRS DURING BLACKOUT)
IF at least 100 KV of PRZR heaters can NOT be restored within. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, THEN be on RHR within an additional 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
(Refer to Technical Specification 3.1.1.5.)
20 Check S/G Levels:
a.
Both S/G narrow range levels-GREATER THAN 25X
- a. Control total AFW flow greater than 200 gpm until both S/G levels greater than 25X.
P, IE I
I
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AP-ELEC. 1 TITLE:
LOSS OF N12A OR 12B TRANSFORMER REV 6
PAGE ll of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Vhen turbine shaft stops spinning and turning gear oil pump is running, turbine should be placed on turning gear.
21 Complete The Following As D/G Loading Permits:
- a. Turning gear oil pump -
STARTED (42 KV) b.
DC emergency oil pump -
STOPPED
- c. Both control rod shroud fans-STARTED (60 KV per fan)
- d. Vaste gas compressor
- STARTED AS NECESSARY e.
Main transformer cooling fans-STARTED AS NECESSARY
- a. Verify DC emergency oil pump running and break vacuum to accelerate coastdown.
Continue with Step 21c.
VHEN shaft
- stops, THEN stop DC emergency oil pump.
- c. Notify electricians if no control rod shroud fans start.
NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
22 Establish If Cooldown is Required:
a.
Cooldown - DETERMINED NECESSARY (Refer to ES-0.2, NATURAL CIRCULATION COOLDOVN)
- a. IF unit is to remain at hot
- shutdown, THEN refer to 0-3, HOT SHUTDOWN VITH XENON PRESENT.
23 Establish RESTORATION OF OFFSITE POWER (Refer to ER-ELEC.l, RESTORATION OF OFFSITE POWER)
AP-ELEC.1 LOSS OF g12A OR 12B TRANSFORMER REV:
6 PAGE 12 of 12 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Complete NOTIFICATION TO HIGHER SUPERVISION 25 Return to Procedure And Step In Effect
-END-
P
EOP:
AP-ELEC. 1 TITLE:
LOSS OF 412A OR 12B TRANSFORMER 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 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 CNMT TEMPERATURE INCREMENTS 10'F NORMAL CNMT 0
250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
EOP:
AP-ELEC. 1 LOSS OF N12A OR 12B TRANSFORMER REV 6
PAGE 1 of 1 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
RCS hot leg temperatures 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.1, RESTORATION OF PRZR HEATERS DURING BLACKOUT) o One Reactor Compartment Cooling Fan
)
E