ML17262A538
| ML17262A538 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/03/1991 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17262A536 | List: |
| References | |
| AP-ELEC.1, NUDOCS 9107110291 | |
| Download: ML17262A538 (42) | |
Text
Eopf AP-ELEC.1 TITLE LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 1 of 19 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER~M TECHNICAL REVIEW PORC REVIEW DATE T SUPERIN ND NT EF EC IVE DATE CATEGORY 1.0 REVIEWED BY:
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 2 of 19 A.
PURPOSE This procedure provides actions to respond to a loss of N12A or 12B SS Transformer from HSD or at power conditions.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure may be entered from:
a.
AP-TURB.l, when busses 12A and/or 12b are found to be deenergized.
2.
SYMPTOMS The symptoms of loss of 512A or 12B SS Transformer are:
a.
Annunciator L-20, 12A XFMR OR 12A BUS TROUBLE, lit, or b.
Annunciator L-28, 12B XFMR OR 12B BUS TROUBLE, lit.
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 3 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF AT ANY TIME DURING THIS PROCEDURE A REACTOR TRIP OR SI IS REQUIRED, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o IF A TURBINE RUNBACK HAS OCCURRED, THEN AP-TURB.2, AUTOMATIC TURBINE RUNBACK, SHOULD BE PERFORMED.
1 Verify Emergency D/G Associated With Dead Bus-RUNNING o
Bus 12A - D/G A o
Bus 12B - D/G B IF appropriate emergency D/G(s). NOT
- running, THEN attempt to start manually.
(Refer to ER-D/G.l, RESTORATION OF A FAILED D/G.)
2 Verify Both Trains Of AC Emergency Busses Energized To At Least'420 VOLTS:
o Bus 14 and bus 18 o
Bus 16 and bus 17 Try to restore power to all AC emergency busses.
IF power can NOT be restored to at least one train, THEN go to ECA-O.O, LOSS OF ALL AC
- POWER, Step 1.
3 Verify Service Water System Operation:
- GREATER THAN 40 PSIG IN EACH LOOP
- a. Manually start pumps as necessary.
(258 kw each)
- b. Manually align valves as necessary.
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AP-ELEC. 1 TITLE!
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 4 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Verify CCW Pump Operation:
- a. At least one CCW pump - RUNNING
- b. Annunciator A-22, CCV PUMP DISCHARGE LO PRESS 60 PSIG-EXTINGUISHED
- a. Start one CCW pump (124 kw).
- b. Start second CCV pump (124 kw).
5 Verify Bus 11A And 11B Normal Feed Breakers CLOSED IF turbine trip has occurred from power less than 50X, THEN go to AP-TURB.1, TURBINE TRIP VITHOUT RX TRIP REQUIRED, Step 1.
IF turbine stop valves open, THEN'rip turbine and go to AP-TURB.1, TURBINE TRIP VITHOUT RX TRIP REQUIRED, Step 1.
IF turbine NOT previously latched, THEN perform the following:
- a. Ensure reactor power less than 8X.
b.
Go to Step 16.
6 Check S/G Level Control o
S/G level - TRENDING TO PROGRAM o
MFV regulating valves-CONTROLLING IN AUTO Place MFW regulating valves in MANUAL and control feed flow as required.
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 5 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
When restarting equipment for recovery, it is preferable to start equipment on busses being supplied from offsite power, if possible.
7 Establish Normal Charging Flow:
- a. Verify 2 charging pumps - RUNNING
- b. Adjust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P
- a. Start charging pumps as necessary (75 kw each).
8 Check CVCS Letdown:
- a. Normal letdown in service:
o Letdown flow - APPROXIMATELY 40 GPM o
Letdown flow -
STABLE
- a. Perform the following:
- 1) Place AOV-427 switch to CLOSE
- 2) Place letdown orifice isolation valves to CLOSE.
o Letdown pressure-APPROXIMATELY 250 PSIG 3)
Go to Step 9.
b.
Go to Step ll 9
Check PRZR Level GREATER THAN13'ontinue with Step 12.
WHEN PRZR level greater than 13%,
THEN do Steps 10 and 11.
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AP-ELEC. 1 T!TLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 6 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Establish Normal Letdown:
Establish Excess Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM.
- b. Verify the following switches in CLOSE:
~ Letdown orifice valve (AOV-200A, AOV-200B, and AOV-202)
~ Loop B cold leg to REGEN Hx AOV-427
- c. Place letdown controllers in MANUAL at 25X open.
~ TCV-130
~ PCV-135 d.
Open AOV-427.
e.
Open letdown orifice valves as necessary.
- f. Place TCV-130 in AUTO at 105'F.
- a. Place excess letdown divert
- valve, AOV-312, to NORMAL
- b. Ensure CCW from excess letdown
- open, AOV-745
- c. Ensure RCP seal return isolation valve open, MOV-313 d.
Open excess letdown isolation valve,.AOV-310
- e. Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig
- g. Place PCV-135 in AUTO at 250 psig.
- h. Adjust charging pump speed and HCV-142 as, necessary.
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 7 of 19 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 FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OF THE D/GS.
t ll Verify PRZR Heaters Restored:
o PRZR proportional heater breaker
- CLOSED o
PRZR backup heater breaker-RESET/IN AUTO Perform the following:
- a. Verify adequate D/G capacity available for PRZR heaters (400 kw each bank).
- b. Reset and close PRZR proportional heater breaker if necessary.
- c. Reset PRZR backup heater breaker and return to AUTO if necessary.
IF on natural circulation and at least 100 kw 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)
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 8 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Establish Stable Plant Conditions:
- a. Reset NIS rod drop rod stop signals (at NIS racks)
- b. Tavg - TRENDING TO TREF c.
PRZR pressure
- TRENDING TO 2235 PSIG d.
PRZR level - TRENDING TO PROGRAM
- b. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.
- c. Verify proper operation of PRZR heaters and spray or take manual control of PC-431K.
- d. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
13 Restore Normal Alignment:
- a. Verify at least 2
CNMT recirc fans - RUNNING
- b. Verify IA available:
o Annunciator H-8, INSTRUMENT AIR LO PRESS - EXTINGUISHED
- a. Start CNMT recirc fans as necessary (240 kw each).
o Annunciator H-16, INSTRUMENT AIR COMPRESSOR - EXTINGUISHED
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 9 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Power operation may continue if conditions required by Tech Spec section 3.7 are met..
14 Establish Normal Operation:
- a. Verify circuit 76702 or 75112-AVAILABLE
- b. Restore power to 12A and/or 12B bus (refer to ER-ELEC.1, RESTORATION OF OPPSITE POVER)
- a. Continue to monitor plant conditions and go to Step 15.
15 Establish Normal Plant Conditions:
- a. Verify EH control in OPER PAN and IMP IN
- b. Verify steam dump controller, HC-484, in AUTO at 1005 psig
- c. Verify annunciator G-15, STEAM DUMP ARMED - EXTINGUISHED
- a. IF conditions requiring runback have cleared, THEN place EH in OPER PAN and IMP IN.
- c. IP Tavg within 6'P of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
Verify charging pump speed control in AUTO
- e. Verify Rod Control Selector Switch in AUTO f.
Go to Step 30
- 2) Reset steam dump.
- d. Place charging pump speed control in AUTO if desired.
- e. Place Rod Control Selector
'witch in AUTO if desired.
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 10 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o Following RCP trip, a decrease in idle S/G level may occur.
- Also, swell may be anticipated in the operating S/G due to load pickup from the idle loop.
o Temperatures in the loop with the stopped RCP will not be indicative of true Tavg and aT values.
o Attempts to restore offsite power should continue.
(Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER.')
16 Check S/G Feed Status:
a.
Any main feed pump - RUNNING
- a. Perform the following:
- 1) Verify MDAFW pumps running as necessary.
- 2) Verify TDAFW pump running if necessary.
- b. Verify S/G levels - TRENDING TO 39%
- 3) Ensure Rx power less than 2%.
- b. Control feed flow as necessary to restore S/G level.
17 Check TDAFW Pump Status:
a.
TDAFW pump - RUNNING b.
Check S/G status o
At least one S/G level-GREATER THAN 17%
a.
Go to Step 18.
b.
Go to Step 18.
-OR-o Both MDAFW pumps - OPERABLE
- c. Pull stop TDAFW pump steam supply valves
~ MOV-3504A
~ MOV-3505A
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 11 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Check Any RCP RUNNING Verify natural circulation.
(Refer to Attachment NC.)- IF natural circulation can NOT be verified, THEN increase dumping steam.
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV: 7.
PAGE 12 of 19 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 FOR CONTINUOUS SERVICE.
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OF AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OF THE D/GS.
19 Restore Non-Safeguards Busses As Follows:
- a. Close non-safeguards bus tie breakers for affected bus(ses):
~ Bus 13 to bus 14 tie
~ Bus 15 to bus 16 tie
- a. IF breaker can NOT be closed, THEN notify electricians.
- b. Before energizing affected MCC(s) place the associated pumps in PULL STOP:
o MCC A
~ EH pump A
~ Turning gear oil pump
~ HP seal oil backup pump o
~ EH pump B
- c. Restore power to affected MCC(s):
~ A from bus 13
~ B from bus 15
~ E from bus 15
~ F from bus 15
- c. IF any breaker can NOT be
- closed, THEN notify electricians.
d.
WHEN bus 15 restored, THEN reset control room lighting if necessary
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 13 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Establish IA:
- a. Verify 2 IA compressors
- RUNNING
- b. Check IA supply o
Pressure
- GREATER THAN 60 PSIG o
Pressure
- STABLE OR INCREASING
- a. Dispatch an AO to reset and start IA-compressors as D/G loading permits (75 kw each).
- b. IF IA can NOT be established, THEN refer to AP-IA.l, LOSS OF INSTRUMENT AIR.
21 Verify Instrument Bus 1D-ENERGIZED Energize MCC B.
IF MCC B.NOT available, THEN perform the following:
- a. Verify MCC A energized.
- b. Place instrument bus D on maintenance supply.
22 Establish Normal Charging Flow:
- a. Verify 2 charging pumps - RUNNING
- b. Ad)ust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P
- a. Start charging pumps as necessary (75 kw each).
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 14 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 23 Check CVCS Letdown:
- a. Normal letdown in service:
'o Letdown flow - APPROXIMATELY 40 GPM o
Letdown flow - STABLE o
Letdown pressure-APPROXIMATELY 250 PSIG
- a. Perform the following:
- 1) Place AOV-427 switch to CLOSE
- 2) Place letdown orifice isolation valves to CLOSE.
3)
Go to Step 24.
b.
Go to Step 26 24 Check PRZR Level GREATER THAN13'ontinue with 'Step 27.
WHEN PRZR level greater than
- 13X, THEN do Steps 25 and 26.
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 15 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 25 Establish Normal Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM.
- b. Verify the following switches in CLOSE:
~ Letdown orifice valve (AOV-200A, AOV-200B, and AOV-202)
~.Loop B cold leg to REGEN Hx AOV-427
- c. Place letdown controllers in MANUAL at 25X open.
~ TCV-130
~ PCV-135 Establish Excess Letdown:
- a. Place excess letdown divert
- valve, AOV-312, to NORMAL
- b. Ensure CCV from excess letdown
- open, AOV-745
- c. Ensure RCP seal return isolation valve open, MOV-313 d.
Open excess letdown isolation
- valve, AOV-310
- e. Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig d.
Open AOV-427.
e.
Open letdown orifice valves as necessary.
- f. Place TCV-130 in AUTO at 105'F.
- g. Place PCV-135 in AUTO at 250 psig.
- h. Adjust charging pump speed and HCV-142 as necessary.
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 16 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
OBSERVE D/G LOADING LIMITS OF 2300 KW POR 1/2 HOUR, 2250 KW POR 2 HOURS, AND 1950 KW POR CONTINUOUS SERVICE.
=
o ANYTIME EMERGENCY D/GS ARE THE ONLY SOURCE OP AC POWER TO THE PLANT, PERSONNEL SHOULD BE ASSIGNED TO MAINTAIN SURVEILLANCE OP THE. D/GS.
26 Verify PRZR Heaters Restored:
o PRZR proportional heater breaker
- CLOSED o
PRZR backup heater breaker-RESET/IN AUTO Perform the following:
- a. Verify adequate D/G capacity available for PRZR heaters (400 kw each bank).
- b. Reset and close PRZR proportional heater breaker if necessary.
- c. Reset PRZR backup heater breaker and return to AUTO if necessary.
IF on natural circulation and at least 100 kw 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)
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AP-ELEC.1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 17 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 27 Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF b.
PRZR pressure
- TRENDING TO 2235 PSIG
- a. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.
- b. Verify proper operation of PRZR heaters and spray or take manual control of PC-431K.
c.
PRZR level - TRENDING TO PROGRAM
- c. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
28 Verify Both S/G Levels GREATER THAN 254 Control feed flow as necessary to restore both S/G levels greater than 25%.
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 18 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION OBSERVE D/G LOADING LIMITS OF 2300 KW FOR 1/2 HOUR, 2250 KW FOR 2 HOURS, AND 1950 KW FOR CONTINUOUS SERVICE.
NOTE:
Evaluate conditions to determine if turbine should be placed on turning gear.
29 Establish Normal Shutdown Alignment:
- a. Start turning gear oil pump (42 kw) and verify pump - RUNNING
- b. Stop Dg emergency oil pump
- c. Verify adequate Rx head cooling:
- 1) Verify at least one control rod shroud fan - RUNNING
- 2) Verify one Rx compartment cooling fan - RUNNING d.. Dispatch. AO to start waste gas compressor as necessary
- a. Verify DC emergency oil pump running and break vacuum to accelerate turbine coastdown.
Continue with Step 29c.
WHEN shaft stops, THEN stop DC emergency oil pump.
- 1) Manually start one fan as power supply permits (45 kw).
- 2) Manually start one fan as power supply permits (23 kw).
- e. Start main transformer cooling fans as necessary
- f. Start CNMT recirc fans as necessary (240 kw each)
- g. Verify radiation monitoring system operating as required
- h. Verify motor'ire pump breaker-CLOSED
- g. Reset radiation monitors and restart ventilation systems as necessary.
- h. Close motor fire pump breaker.
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER REV:
7 PAGE 19 of 19 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 30 WHEN Conditions Permit, THEN Restore Offsite Power (Refer to ER ELEC 1 I RESTORATION OF OFFSITE POWER) 31 Notify Higher Supervision NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
32 Return To Procedure Or Guidance In Effect
-END-
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AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER REV 7
PAGE 1 of 1 AP-ELEC.
1 APPENDIX LIST TITLE PAGES')
FIGURE MIN SUBCOOLING 2)
ATTACHMENT NC
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AP-ELEC. 1 TITLE:
LOSS OF 12A AND/OR 12B TRANSFORMER 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
S PRESSURE (PSIG)
RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION DVERS NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE
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INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
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