ML17262A539

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Rev 8 to AP-ELEC.1, Loss of 12A &/Or 12B Transformer
ML17262A539
Person / Time
Site: Ginna Constellation icon.png
Issue date: 06/17/1991
From: Widay J
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17262A536 List:
References
AP-ELEC.1, NUDOCS 9107110292
Download: ML17262A539 (64)
v • d • e


Text

EOP:

AP-ELEC.1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

PAGE 1 of 19 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE n

P T SUPERINT ND NT E FECTI E DATE CATEGORY 1.0 REVIEWED"BY:

9107110292 910619 PDR ADOCK 05000244 F

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AP-ELEC.1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

PAGE 2 of 19 A.

PURPOSE This procedure provides actions to respond to a loss of 412A 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.1, when busses 12A and/or 12b are found to be deenergized.

2.

SYMPTOMS, The symptoms of loss of gl2A 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 LOSS OF 12A AND/OR 12B TRANSFORMER REV:

8 PAGE 3 of 19 KPP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION o

IP AT ANY TIME DURING THIS PROCEDURE A REACTOR TRIP OR SI IS REQUIRED, E-O, REACTOR TRIP OR SAPETY INJECTION, SHALL BE PERPORMED.

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 OP 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.

IP power can NOT be restored to at least one train, THEN go to ECA-O.O, LOSS OP ALL AC

POWER, Step l.

3 Verify Service Water System Operation:

a.

SW pumps - AT LEAST ONE RUNNING IN EACH LOOP b.

SW header pressure

- 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.l TITLE:

LOSS. OF 12A AND/OR 12B TRANSFORMER REV:

8 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, CCW PUMP DISCHARGE LO PRESS 60 PSIG-EXTINGUISHED
a. Start one CCW pump (124 kw).
b. Start second CCW pump (124 kw).

5 Verify Bus 11A And llB Normal Feed Breakers CLOSED IF turbine trip has occurred from power less than 50X, THEN go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step 1.

IF turbine stop valves open, THEN trip turbine and go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step 1.

IF turbine NOT previously latched, THEN perform the, following:

a.

Ensure reactor power less than SX.

b.

Go to Step 16.

6 Check S/G Level Control o

S/G level - TRENDING TO PROGRAM o

MFW 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:

8 PAGE 5 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

Vhen 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.
b. Adjust charging pump speed and HCV-142 as necessary to restore PRZR level and labyrinth seal D/P 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 o

Letdown pressure-APPROXIMATELY 250 PSIG a.

Perform the following:

1) Place AOV-427 switch to CLOSE
2) Place letdown orifice'solation valves to CLOSE.

3)

Go to Step 9.

b.

Go to Step 11 9

Check PRZR Level GREATER THAN 13<

Continue with Step 12.

@HEN PRZR level greater than

13X, THEN do Steps 10 and 11.

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

8 PAGE 6 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 10 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 d.

Open AOV-427.

e.

Open letdown orifice valves as necessary.

f. Place TCV-130 in AUTO at 105'F.

Perform the following steps in sequence to establish excess letdown:

o Place excess letdown divert

valve, AOV-312, to NORMAL o

Ensure CCW from excess letdown

open, AOV-745 o

Ensure RCP seal return isolation valve open, MOV-313 o

Open excess letdown isolation

valve, AOV-310 o

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 F 1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

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.

ll Verify PRZR Heaters Restored:

o PRZR proportional heater'reaker 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/t'OR 12B TRANSFORMER REV:

8 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).
b. Dispatch AO to restore IA compressors as necessary (75 kw each).

o Annunciator H-16, INSTRUMENT ACR COMPRESSOR - EXTINGUISHED

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AP-ELEC. 1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV' 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 OFFSITE 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. IF Tavg within 6'F of Tref, THEN perform the following:
1) Ensure steam dump valves closed.

d: 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 Switch in AUTO if desired.

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AP-ELEC. 1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV:

8 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.l, RESTORATION OF OFFSITE POWER.)

16 Check S/G Feed Status:

a.

Any main feed pump - RUNNING

b. Verify S/G levels - TRENDING TO 39%
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. 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 TITLE LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

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 rrTLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV:

8 PAGE 12 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

++ *********

4 *************************

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

MCCB

~ 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 8

PAGE 13 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAXNED 20 Establish IA:

a. Verify 2 IA compressors

- RUNNING

b. Check IA supply o

Pressure

- GREATER THAN 60 PSIG o

Pr'essure

- 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 OR XNSTRUMENT AIR.

21 Verify Instrument Bus 1D

'NERGIZED Energize MCC B.

IP 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. 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).

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

8 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 THAN 13~

Continue with Step 27.

VHEN PRZR level greater than 13%,

THEN do Steps 25 and 26.

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AP-ELEC. 1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV:

8 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 25% open.

~ TCV-130

~ PCV-135 d.

Open AOV-427.

e.

Open letdown orifice valves as necessary.

f. Place TCV-130 in AUTO at 105'R.

Perform the following steps in sequence to establishexcess letdown:

o Place excess letdown divert

valve, AOV-312, to NORMAL o

Ensure CCW from excess letdown

open, AOV-745 o

Ensure RCP seal return isolation valve open, MOV-313 o

Open excess letdown isolation

valve, AOV-310 o

Slowly open HCV-123 to maintain excess letdown temperature less than 195'R 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:

8 PAGE 16 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.

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:

8 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 c.

PRZR level - TRENDING TO PROGRAM

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. 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 25~o Control feed flow as necessary to restore both S/G levels greater than 25K.

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AP-ELEC. 1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

PAGE 18 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION OBSERVE D/G LOADING LIMITS OP 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 DC emergency oil pump
c. Verify adequate Rx head cooling:
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) Verify at least one control-rod shroud fan - RUNNING
2) Verify one Rx compartment cooling fan - RUNNING
d. Dispatch AO to start vaste gas compressor as necessary
1) Manually start one fan as pover supply permits (45 kw).
2) Manually start one fan as power supply permits (23 kv).
e. Start main transformer cooling fans as necessary
f. Start CNMT recirc fans as necessary (240 kv each)
g. Verify radiation monitoring system operating as required
h. Verify motor fire 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 LOSS OF 12A AND/OR 12B TRANSFORMER REV:

8 PAGE 19 of 19 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 30

~WHE Conditions Permit, THEN.

Restore Offsite Power (Refer to ER-ELEC.1, 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:

8 PAGE 1 of 1 AP-ELEC.

1 APPENDIX LIST TITLE PAGES 1)

FIGURE MIN SUBCOOLING 2)

ATTACHMENT NC

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EOP AP-ELEC.1 TITLE:

LOSS OF 12A AND/OR 12B TRANSFORMER REV 8

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 900 800 700 500 500 400 300 200 100 0

S PRESSURE (PSIG)

RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION

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  • L ADVERS'E CNMT NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)

a

May 15, 1991 To Copy Holder I~~~:

Enclosed please find a copy of procedure AP-ELEC.l, MSS OF 12A and/OR 12B TRANSH3RKR.

This was sent to you on May 3, 1991.

The first copy sent out does not include a Step 4.

Sorry for any inconvenience.

Any questions, please call ae on x-206.

Thanks, A

Donna Pinkm<

EOP:

AP-RCS.2 LOSS OF REACTOR COOLANT FLOW REV-6 PAGE 1 of 8 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE LANT SUPERINTENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

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EOP,:

AP-RCS.2.

71TLE:

LOSS OF REACTOR COOLANT FZQW REV:

6 PAGE 2 of 8 A.

PURPOSE This procedure provides actions required to stabilize plant conditions following a loss of reactor coolant flow.

B.

ENTRY CONDITlONS/SYMPTOMS 1.

SYMPTOMS The symptoms of LOSS OF REACTOR COOLANT FLOW are:

a.

Annunciator A-17, MOTOR OFF RCP CCWP, lit, or b.

Annunciator B-29, RCP BREAKER CHANNEL ALERT, lit, or c.

Low RCS flow indicated in either or both loops and verified by more than one indication, or d.

Steam flow rapidly decreasing in one loop and rapidly increasing in the other loop.

e.

Annunciator B-27, (28),

RCS'Loop A(B) Lo Flow Channel Alert.

EOP:

AP-RCS.2, TITLE:

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 3 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 4 **************************

1 Check RCS flows:

a. Verify,at least one loop operating:

o One RCP running o

Flow greater than 91% in one loop

b. Verify two loops operating:

o Both RCPs running o

Flow greater than 91$ in both loops

c. Return to procedure and step in effect
a. IF reactor trip breakers
closed, THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.

IF reactor trip breakers

open, verify natural circulation per Attachment NC AND go to Step 2.
b. IF power greater than 8%,

THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.

IF power less than 8%,

THEN go

, to step 2.

2 Verify ROD CONTROL BANK SELECTOR In MANUAL Place ROD CONTROL BANK SELECTOR switch in MANUAL.

EOP,:

AP-RCS.2 TITLE:

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 4 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED

                                        • 4 4 ************

CAUTION IF ONLY ONE RCP IS LOST, THEN A DECREASE (SHRINK) IN IDLE S/G LEVEL COUPLED WITH AN INCREASE (SWELL) IN OPERATING S/G LEVEL SHOULD BE ANTICIPATED.

3 Monitor S/G Levels TRENDING TO PROGRAM Restore narrov range level to program.

IF S/G level can NOT be restored, THEN trip the reactor and go to E-O, REACTOR TRIP OR SAFETY INJECTION.

EOP,:

AP-RCS.2 LOSS OF REACTOR COOLANT FLOW REV:

6 PAGE 5 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

Temperatures in the idle loop may not be indicative of true Tavg and hT values and may affect automatic control systems operation.

Operating loop values should be used for control.

4 Establish Stable Plant Conditions:

Tavg - TRENDING TO TREF

a. Insert control rods or, if necessary decrease turbine load to match Tavg of the operating loop to Tref.

b.

PRZR pressure

- TRENDING TO 2235 PSIG

b. Verify proper operation of PRZR heaters and spray or take manual control of PRZR pressure controller 431K.

IF pressure can NOT be controlled, THEN refer to AP-PRZR.1, ABNORMAL

'RESSURIZER PRESSURE.

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.

IF letdown isolation has

occurred, THEN place Letdown Loop B Cold Leg to RHX AOV-427 to close.

d.

Check S/G levels

- TRENDING TO PROGRAM

d. Control feed flow as necessary to restore both S/G levels to 39'.

e.

Steam dump valves CLOSED e.

Ensure proper operation of steam dump control system.

EOP:

AP-RCS.2 TlTLE:

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 6 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED CAUTION SHUTDOWN MARGIN REQUIREMENTS SHOULD BE VERIFIED (REFER TO 0-3.1, BORON CONCENTRATION FOR XENON FREE ALL RODS IN MOST REACTIVE ROD STUCK OUT SHUTDOWN MARGIN).

5 Check Reactor Status:

o Power less than 2.5x10 amps o

Reactor Trip Breakers open Initiate plant shutdown (Refer to appropriate section of 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN).

6 Check Letdown Status a.

Normal OR Excess Letdown in service.

a.

GO TO Step 7.

b.

GO TO Step S.

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AP-RCS.2.

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 7 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED 7 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 35% 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
g. Place PCV-135 in AUTO at 250 psig
h. Ad)ust charging pump speed and HCV-142'as necessary Perform the following steps in sequence to establish excess letdown:

o Place excess letdown divert

valve, AOV-312, to NORMAL o

Ensure CCW from excess letdown

open, AOV-745 o

Ensure RCP seal return isolation valve open, MOV-313 o

Open excess letdown isolation

valve, AOV-310 o

Slowly open HCV-123 to maintain excess letdown'temperature less than 195'F and pressure less than 100 psig

AP-RCS.2.

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 8 of 8 STEP ACTION/EXPECTED RESPONSE

RESPONSE

NOT OBTAINED NOTE:

Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.

8 Notify Higher Supervision 9

Return To Procedure Or Guidance In Effect

- END-

I~

EOP:

AP-RCS

~ 2 4

TlTLE:

LOSS OF REACTOR COOLANT FLOW REV 6

PAGE 1 of 1

AP-RCS.2 APPENDIX LIST TITLE PAGES 1)

FIGURE MIN SUBCOOLING 2)

ATTACHMENT NC

EOP".AP-RCS.2'OSS OF REACTOR COOLANT FLOW REV' 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

S PRESSURE

{PSIG)

RCS PRESSURE INCREHENTS 20 PSIG SUBCOOLED REGION ADVERSE C

NORHAL CNHT INADE(UATE SUBCOOLING REGION TEHPERATURE INCREHENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE ('F)

f,

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