ML17262A538

Rev 7 to EOP AP-ELEC.1, Loss of 12A &/Or 12B Transformer.

ML17262A538
Person / Time
Site:	Ginna
Issue date:	05/03/1991
From:	Widay J ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17262A536	List: ML17262A535 ML17262A537 ML17262A538 ML17262A539 ML17262A540 ML17262A541 ML17262A543
References
AP-ELEC.1, NUDOCS 9107110291
Download: ML17262A538 (42)

Text

Eopf TITLE REV: 7 AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER 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:

9i07ii029i 9i06i9 PDR ADDCK OSO002~4 I F PDR

C- JO 1 4 ~

Pr ~1 I

QE4

~

rv,>.

EOP:

REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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.

! ~

II ih E

%f 6>>

EOP: TITLE:

REV: 7 AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER 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 IF appropriate emergency D/G(s). NOT Associated With Dead Bus- running, THEN attempt to start RUNNING manually. (Refer to ER-D/G.l, RESTORATION OF A FAILED D/G.)

o Bus 12A - D/G A o Bus 12B - D/G B 2 Verify Both Trains Of AC Try to restore power to all AC Emergency Busses Energized To emergency busses. IF power can NOT At Least'420 VOLTS: be restored to at least one train, THEN go to ECA-O.O, LOSS OF ALL AC o Bus 14 and bus 18 POWER, Step 1.

o Bus 16 and bus 17 3 Verify Service Water System Operation:

a. 'SW pumps - AT LEAST ONE RUNNING a. Manually start pumps as IN EACH LOOP necessary. (258 kw each)

b. SW header pressure - GREATER b. Manually align valves as THAN 40 PSIG IN EACH LOOP necessary.

lg 'I I

A 5'

EOP! TITLE! REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 4 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Verify CCW Pump Operation:

a. At least one CCW pump - RUNNING a. Start one CCW pump (124 kw).

b. Annunciator A-22, CCV PUMP b. Start second CCV pump (124 kw).

DISCHARGE LO PRESS 60 PSIG-EXTINGUISHED 5 Verify Bus 11A And 11B Normal IF turbine trip has occurred from Feed Breakers CLOSED power less than 50X, THEN go to AP-TURB.1, TURBINE TRIP VITHOUT RX TRIP REQUIRED, Step 1.

IF turbine stop valves open, turbine and go to AP-TURB.1, THEN'rip 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 Place MFW regulating valves in MANUAL and control feed flow as o S/G level - TRENDING TO PROGRAM required.

o MFV regulating valves-CONTROLLING IN AUTO

~ F

,a

&P

>P>

'ft f t

V.

EOP: TITLE:

REV: 7 AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER 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 a. Start charging pumps as necessary (75 kw each).

b. Adjust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P 8 Check CVCS Letdown:

a. Normal letdown in service: a. Perform the following:

o Letdown flow - APPROXIMATELY 1) Place AOV-427 switch to CLOSE 40 GPM

2) Place letdown orifice o Letdown flow - STABLE isolation valves to CLOSE.

o Letdown pressure- 3) Go to Step 9.

APPROXIMATELY 250 PSIG

b. Go to Step ll 9

THAN 13'ontinue Check PRZR Level GREATER with Step level greater than Steps 10 and 11.

12. WHEN PRZR 13%, THEN do

~ g j

EOP: T!TLE: REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 6 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 10 Establish Normal Letdown: Establish Excess Letdown:

a. Establish charging line flow to a. Place excess letdown divert REGEN Hx - GREATER THAN 20 GPM. valve, AOV-312, to NORMAL

b. Verify the following switches in b. Ensure CCW from excess letdown CLOSE: open, AOV-745

~ Letdown orifice valve c. Ensure RCP seal return isolation (AOV-200A, AOV-200B, and valve open, MOV-313 AOV-202)

~ Loop B cold leg to REGEN Hx d. Open excess letdown isolation AOV-427 valve, .AOV-310

c. Place letdown controllers in e. Slowly open HCV-123 to maintain MANUAL at 25X open. excess letdown temperature less than 195'F and pressure less

~ TCV-130 . than 100 psig

~ PCV-135

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.

I A~

k'E C

EOP: TITLE: REV: 7 AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER 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: Perform the following:

o PRZR proportional heater breaker a. Verify adequate D/G capacity

- CLOSED available for PRZR heaters (400 kw each bank).

o PRZR backup heater breaker-RESET/IN AUTO 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 hours. (Refer to Technical Specification 3.1.1.5)

-k J +'%

4rPe Jj'4

$ ~

4 ~

A S'

EOP: TITLE: REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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 b. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.

c. PRZR pressure - TRENDING TO c. Verify proper operation of PRZR 2235 PSIG heaters and spray or take manual control of PC-431K.

d. PRZR level - TRENDING TO PROGRAM 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 a. Start CNMT recirc fans as fans - RUNNING necessary (240 kw each).

b. Verify IA available: b. Dispatch AO to restore IA compressors as necessary (75 kw o Annunciator H-8, INSTRUMENT each).

AIR LO PRESS - EXTINGUISHED o Annunciator H-16, INSTRUMENT AIR COMPRESSOR - EXTINGUISHED

I SQI e k t4 4,

S

EOP: TITLE:

REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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- a. Continue to monitor plant AVAILABLE conditions and go to Step 15.

b. Restore power to 12A and/or 12B bus (refer to ER-ELEC.1, RESTORATION OF OPPSITE POVER) 15 Establish Normal Plant Conditions:

a. Verify EH control in OPER PAN a. IF conditions requiring runback and IMP IN have cleared, THEN place EH in OPER PAN and IMP IN.

b. Verify steam dump controller, HC-484, in AUTO at 1005 psig

c. Verify annunciator G-15, STEAM c. IP Tavg within 6'P of Tref, THEN DUMP ARMED - EXTINGUISHED perform the following:

1) Ensure steam dump valves closed.

2) Reset steam dump.

Verify charging pump speed d. Place charging pump speed control in AUTO control in AUTO if desired.

e. Verify Rod Control Selector e. Place Rod Control Selector Switch in AUTO 'witch in AUTO if desired.

f. Go to Step 30

s P 4

p A 1 k

I 4

i II' tl

EOP:

REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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.

3) Ensure Rx power less than 2%.

b. Verify S/G levels - TRENDING TO b. Control feed flow as necessary 39% to restore S/G level.

17 Check TDAFW Pump Status:

a. TDAFW pump - RUNNING a. Go to Step 18.

b. Check S/G status b. Go to Step 18.

o At least one S/G level-GREATER THAN 17%

-OR-o Both MDAFW pumps - OPERABLE

c. Pull stop TDAFW pump steam supply valves

~ MOV-3504A

~ MOV-3505A

ly

"'VC y

'au

~ ~ g A

EOP:

REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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.

~ ~

FJ.

~ I,

.CV . (4 III

~I

~ aC

~ 4 4 I I 'I

~s "'

4 1 4, 44 I,

tf F4 '

EOP: TITLE: REV: 7.

AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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 a. IF breaker can NOT be closed, breakers for affected bus(ses): THEN notify electricians.

~ Bus 13 to bus 14 tie

~ Bus 15 to bus 16 tie

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 MCCB

~ EH pump B

c. Restore power to affected MCC(s): c. IF any breaker can NOT be closed, THEN notify electricians.

~ A from bus 13

~ B from bus 15

~ E from bus 15

~ F from bus 15

d. WHEN bus 15 restored, THEN reset control room lighting if necessary

J l~

.w W F

WT A

1 P

EOP: TITLE: REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 13 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Establish IA:

a. Verify 2 IA compressors - RUNNING a. Dispatch an AO to reset and start IA- compressors as D/G loading permits (75 kw each).

b. Check IA supply b. IF IA can NOT be established, THEN refer to AP-IA.l, LOSS OF o Pressure - GREATER THAN INSTRUMENT AIR.

60 PSIG o Pressure - STABLE OR INCREASING 21 Verify Instrument Bus 1D- Energize MCC B. IF MCC B.NOT ENERGIZED 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 a. Start charging pumps as necessary (75 kw each).

b. Ad)ust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P

I '1" r'

t

+J 4A lw

EOP: TITLE: REV 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 14 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 23 Check CVCS Letdown:

a. Normal letdown in service: a. Perform the following:

'o Letdown flow - APPROXIMATELY 1) Place AOV-427 switch to CLOSE 40 GPM

2) Place letdown orifice o Letdown flow - STABLE isolation valves to CLOSE.

o Letdown pressure- 3) Go to Step 24.

APPROXIMATELY 250 PSIG

b. Go to Step 26 24 THAN 13'ontinue Check PRZR Level GREATER with 'Step 27.

level greater than 13X, Steps 25 and 26.

WHEN PRZR THEN do

~

g aj lf a>i tg W'I h P J *5

~ l,

EOP:

REV 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 15 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 25 Establish Normal Letdown: Establish Excess Letdown:

a. Establish charging line flow to a. Place excess letdown divert REGEN Hx - GREATER THAN 20 GPM. valve, AOV-312, to NORMAL

b. Verify the following switches in b. Ensure CCV from excess letdown CLOSE: open, AOV-745

~ Letdown orifice valve c. Ensure RCP seal return isolation (AOV-200A, AOV-200B, and valve open, MOV-313 AOV-202)

~ .Loop B cold leg to REGEN Hx d. Open excess letdown isolation AOV-427 valve, AOV-310

c. Place letdown controllers in e. Slowly open HCV-123 to maintain MANUAL at 25X open. excess letdown temperature less than 195'F and pressure less

~ TCV-130 than 100 psig

~ PCV-135

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.

~ J l

I II

EOP: TITLE: REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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: Perform the following:

o PRZR proportional heater breaker a. Verify adequate D/G capacity

- CLOSED available for PRZR heaters (400 kw each bank).

o PRZR backup heater breaker-RESET/IN AUTO 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)

l

'4

~ '+ f

~

1I i

C EOP: TITLE: REV 7 AP-ELEC.1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 17 of 19 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 27 Establish Stable Plant Conditions:

a. Tavg - TRENDING TO TREF a. Insert control rods or, if necessary, decrease turbine load to match Tavg to Tref.

b. PRZR pressure - TRENDING TO b. Verify proper operation of PRZR 2235 PSIG 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 Control feed flow as necessary to GREATER THAN 254 restore both S/G levels greater than 25%.

l F~

~h h

EOP: REV 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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 a. Verify DC emergency oil pump (42 kw) and verify pump - RUNNING running and break vacuum to accelerate turbine coastdown.

Continue with Step 29c. WHEN shaft stops, THEN stop DC emergency oil pump.

b. Stop Dg emergency oil pump

c. Verify adequate Rx head cooling:

1) Verify at least one control 1) Manually start one fan as rod shroud fan - RUNNING power supply permits (45 kw).

2) Verify one Rx compartment 2) Manually start one fan as cooling fan - RUNNING power supply permits (23 kw).

d.. Dispatch. AO to start waste gas compressor as necessary

e. Start main transformer cooling fans as necessary

f. Start CNMT recirc fans as necessary (240 kw each)

g. Verify radiation monitoring g. Reset radiation monitors and system operating as required restart ventilation systems as necessary.

h. Verify motor'ire pump breaker- h. Close motor fire pump breaker.

CLOSED

0 t II

~

lr C

J, aS

EOP: TITLE: REV: 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER 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-

a

'P \ ~

EOP:

REV 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 1 of 1 AP-ELEC. 1 APPENDIX LIST TITLE -

PAGES')

FIGURE MIN SUBCOOLING

2) ATTACHMENT NC

t~

C C I

E W

lg

$ j

/J '

1$

I~

EOP: TITLE: REV 7 AP-ELEC. 1 LOSS OF 12A AND/OR 12B TRANSFORMER PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE: Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication RC S PRESSURE (PSIG) 2500 2400 2300 RCS PRESSURE INCREMENTS 20 PSIG 2200 2100 2000 1900 1800 1700 1600 1500 1400 SUBCOOLED 1300 REGION 1200 1100 1000 900 800 INADEQUATE 700 SUBCOOLING 600 REGION DVERS 500 400 300 200 NORMAL CNMT TEMPERATURE ~

INCREMENTS 10'F 100 0

200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)

~ i