ML20042E400

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Rev 6 to FR-C.1, Response to Inadequate Core Cooling
ML20042E400
Person / Time
Site: Ginna 
Issue date: 04/09/1990
From: Widay J
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17250B096 List:
References
FR-C.1, NUDOCS 9004200728
Download: ML20042E400 (17)
v • d • e


Text

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t0P3 ilfLE' REV:

6-FR-C.1

. RESPONSE TO INADEQUATE CORE COOLING PAGE 1.of 16 ROCHESTER GAS-AND ELECTRIC CORPORATION GINNA-STATION

-CONTROLLED COPY NUMBER-23

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TECHNICAL REVIEW i

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PORC REVIEW DATE V[(f90 k-O. L

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START:

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TIME-l REVIEWED BY:

COMPLETED:

DATE TIME:

90045?OO728 900410

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DR->ADOCK OS000244:

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REV -6 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING e~s PAGE 2 of 16 I

.=nn uns A.

PURPOSE - This procedure provides actions to restore core j

cooling..

B.

ENTRY CONDITIONS / SYMPTOMS 1.

ENTRY CONDITIONS - This procedure is entered from:

a.

F-0.2, CORE COOLING Critical Safety Function Status Tree, on a RED condition'.

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- RESPONSE TO INADEQUATE CORE COOLING PAGE 3-of 16 qv 1

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP i

'EQTX: Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+o5 R/hr.

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1 Check RWST Level - GREATER Perform the following:

THAN 28%

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a. Ensure SI system aligned for cold leg recirculation using l

Steps 1 through 13 of ES-1.3, TRANSFER-TO COLD LEG RECIRCULATION.

b. Go to Step 4.

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REV: 6 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE'4 of 16 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP CAUTION RHR PUMPS SHOULD NOT BE RUN LONGER THAN 1 HOUR VITHOUT CCW TO THE RHR HEAT' EXCHANGERS.

2 Verify SI Pump And RHR Pump Emergency Alignment:

a. RRR pump discharge to Rx vessel
a. Ensure at least one valve open.

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  • MOV-852A
b. Verify SI pump C - RUNNING
b. Manually start pump on available
bus,
c. Verify SI pump A - RUNNING
c. Perform the following:
1) Ensure SI pumps B and C running.

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2) Ensure SI pump C aligned to l

l discharge line At

-o NOV-871B. closed l

o MOV-871A open

3) Go to. Step 3.

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i This Step continued on the next page.

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REV:

6.

l FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 5 of 16-ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP (Step 2 continued from previous page)

d. Verify SI pump B - RUNNING
d. Perform the following:
1) Ensure SI pumps A and C running.
2) Ensure SI-pump C aligned to discharge line B:

i o MOV-871B open o MOU-871A closed

3) Go to Step 3.

e.-Verify both SI pump C discharge

e. Manually open valves as valves - OPEN necessary.
  • MOV-871A O

e MOV-871B-l I

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TITLE REV:

6.

FR-C.1 RESPONSE TO INADEQUATE CORE COOLING, PAGE 6 of 16-ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP l

l 3 Verify SI Pump suction Alignment:

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a. Check BAST levels a.~ Perform the followings.

o Level - GREATER THAN 10%

1) Ensure at least one SI pump suction valve from RVST open.

o Annunciator B-23, BORIC ACID TANK LO LO LEVEL -

.* MOV-825A E'

EXTINGUISHED

  • MOV-825B
2) Ensure at least one valve in each SI pump suction line from BAST closed.
  • MOV-826A or MOV-826B
  • MOV-826C or MOV-826D F
3) Go to Step 4.
b. Verify SI pump suction valves
b. Ensure both valves-in either from BAST - OPEN flow path open.
  • MOV-826A o MOV-826A and MOV-826B
  • MOV-826B
  • MOV-826C

.-OR-

  • MOV-826D o MOV-8260 and MOV-826D
c. Verify SI pump suction from RVST
c. Manually align valves as

- CLOSED

.necessary.

  • MOV-825A
  • MOV-825B 5

4 Verify SI Flow In Both Perform the following:

Trains:

a. Manually start pumps and align I

o SI line loop A and B flow valves as necessary.

indicators - CHECK FOR FLOV

b. Establish maximum charging flow.

2 o RHR loop flow indicator - CHECK-FOR FLOW O

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REVS 6 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 7 of 16 g-STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

ChE~k RCP Support Conditions:

Continue attempts to establish RCP 5

c support conditions.

1

a. Verify Bus llA or llB -

ENERGIZED

b. Check other RCP support l

conditions (Refer to Attachment-RCP START) 6 Check SI ACCUM Discharge H SI ACCUM discharge valves closed Valves - OPEN after ACCUM discharge, 18f2 go to.

3 Step 7.

H E, If4N_ perform the-

  • MOV-841 following:
  • MOV-865 l
a. Dispatch A0 with locked valve key to. locally close breakers for SI ACCUM discharge valves.
  • MOV-841, MCC C position 12F.

4

  • MOV-865, MCC D position-12C I

b.'Open SI ACCUM discharge valves.

  • ACCUM A, MOV-841
  • ACCUM B, MOV-865 1

7 Check Core Exit T/Cs - LESS Go to Step 10.

THAN 1200*F k

8 Check RVLIS Indication:

a. RVLIS level (no RCPs) - GREATER
a. H RVLIS increasing, IEEN. return TRAN 43% [46% adverse CNMT]

to Step 1.

H E, IHTE go to Step 9.

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b. Return to procedure and step in effect O

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FR-C.1 RESPONSE TO INADEQUATE CORE COOLING l

p PAGE 8 of 16 1

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP

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-l 9 Check Core Exit T/Cs:

a. Temperature - LESS THAN 700'F
a. H decreasing, Igfe return to Step 1.

H NQI, IHfe go to Step 10.

b. Return to procedure and step in effect HQIE: This procedure should be continued while obtaining CNMT hydrogen sample in Step 10.

10 Check CNMT Hydrogen Concentration:

a. Direct HP to start CNMT hydrogen monitors as necessary
b. Hydrogen concentration - LESS
b. Consult TSC to determine if

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THAN 0.5%

hydrogen recombiners should be placed in service.-

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REV: 6 FR-C.1

, RESPONSE TO INADEQUATE CORE COOLING PAGE 9 of'16 O

'1 ACTION / EXPECTED RESPONSE RESPONSE NOT-OBTAINED STEP CAUTION o IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE VATER SOURCES FOR AFV PUMPS VILL BE NECESSARY (REFER TO ER-AFV.1, ALTERNATE VATER SUPPLY TO AFV PUMPS).-

o A FAULTED OR RUPTURED S/G SHOULD NOT BE USED IN SUBSEQUENT STEPS UNLESS NO INTACT S/G IS AVAILABLE.

EQIEt TDAFV pump flow control valves fail open on loss of IA.

11 Check Intact S/G Levels:

a. Narrow range level - GREATER
a. Increase total-feed flow to THAN 5% [25% adverse CNMT) restore narrow range level greater than.5% [25% adverse CNMT].

IE total feed flov less than-200 gpm, IBEE go to Step 21.

b. Control feed flow to maintain narrow range level between 17%

[25% adverse CNMT) and 50%

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REV 6

FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 10 of 16 O

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ACTION / EXPECTED RESPONSE RESPONSE NOT'0BTAINED STEP CAUTION IP ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR PRESSURE, IT SHOULD BE CLOSED AFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 12b).

                                        • +************-********

12 Check RCS Vent Paths:

i

a. Power to PRZR PORV block valves
a. Restore power to block valves

- AVAILABLE unless block valve was closed.to isolate an open PORV:

  • MOV-515, MCC C position-.6C
  • MOV-516, MCC D position 6C
b. PORVs - CLOSED
b. H PRZR pressure less than 2335 psig, IggE manually close-
PORVs.

E any PORV can HQI be closed, IEEE manually close its block valve.

c. Block valves - AT LEAST ONE OP'"
c. Open one block valve ~unless it' was closed to isolate an open PORV.
d. Rx vessel head vent valves -
d. Manually close valves.-

CLOSED-

  • SOV-590
  • SOV-591
  • SOV-592

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PAGE'll of-16

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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 13 Verify condenser Steam Dump j

In Manual:

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a. Verify condenser available:
a. Place intact S/G ARV controller in MANUAL and go to Step 14.

o Intact S/G MSIV - OPEN o Annunciator G-15, STEAh DUMP

- LIT i

b. Place steam dump mode selector switch in MANUAL
c. Place steam dump controller in MANUAL E E:

Partial uncovering of G/G tubes is acceptable in the following steps.

t O*s 14 Depressurize All-Intact S/Gs i

To 200 PSIG:

a. Dump steam to condenser at
a. Manually or locally dump steam maximum rate at maximum rate using S/G ARVs.
b. Check S/G pressure - LESS THAN
b. H S/G pressure decreasing, IEEt!

200 PSIG return to Step 11..

1 E E IM go to Step 21.

c. Check RCS hot leg temperatures -
c. H RCS hot leg temperatures-BOTH LESS THAN 400'F decreasing, IEEt!- return to Step 11.

\\

H M, IEEt! go to Step 21.

d. Stop S/G depressurization l

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REV:-6 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 12 of 16 O

1 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED j

STEP i

15 Check If SI ACCUMs Should Be Isolated:

a. RCS hot leg temperatures - BOTH
a. Go to Step 21.

LESS THAN 400'F

b. Close SI ACCUM discharge valves
b. Vent any unisolated ACCUMs
  • ACCUM A, MOV-841
1) Open vent valves for
  • ACCUM B, MOV-865 unisolated SI ACCUMs.
  • ACCUM A,-A0V-834A

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2) Open HCV-945.
c. Locally reopen breakers for MOV-841 and MOV-865 16 Stop Both RCPs 17' Dump Steam to Condenser At Manually or locally dump steam at-Maximum Rate To Depressurize maximum rate using S/G ARVs.

All Intact S/Gs To

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Atuospheric Pressure 18 Verify SI Flow:

Perform the following:

o SI line loop A and B flow

a. Continue efforts to establish SI indicators - CHECK FOR FLOV

.flov.

-OR-

b. Try to establish charging flow.

o RHR loop flow indicator - CHECK

c. H core exit T/Cs less than.

FOR FLOV 1200*F, M return to Step 17.

H HQT., M go to Step 21.

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TITLE:

REV1 6

~FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 13 of 16 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 19 - Check Core Cooling:

a. Core exit T/Cs - LESS THAN
a. Go to Step 21.

1200'F

-l

b. RCS hot leg temperatures - BOTH
b. Return to Step 17.

4 LESS THAN 325'F

c. RVLIS level (no RCPs) - GREATER
c. Return to Step 17.

THAN 68% [73% adverse CNMT]

20 Go to Appropriate Plant Procedure

a. Check RVST level - GREATER THAN
a. Go to ES-1.3, TRANSFER TO COLD 28%

LEG RECIRCULATION, Step.l.

b. Go to E-1, LOSS OF REACTOR OR SECONDARY COOLANT, Step 17 E91Et ' Normal conditions are desired but not required for starting the RCPs.

21 Check Core Exit T/Cs - LESS Start RCPs as necessary until core THAN 1200*F exit T/Cs-less_than_1200'F._

i H core. exit T/cs greater-than 1200'F and all available RCPs-running, IggE open all PRZR PORVs and block valves. R IA EQI available, IggE refer to Attachment j

N2 PORVS.

H core exit T/Cs greater than 1200*F and all PRZR PORVs and' block valves open, IggE open Rx vessel head vent valves.

  • SOV-590
  • SOV-593 O

EDPI flREt REV

-6 FR-C.1' RESPONSE TO INADEQUATE CORE COOLING

+

PAGE 14 of 16 O

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP. -

22 Try To Locally Depressurize Use faulted or ruptured S/G.

All Intact S/Gs To Atmospheric Pressure:

o Use intact S/G(s) ARVs

-OR-o Open TDAFV pump steam supply ~

valve from intact S/G(s)

  • S/G A, MOV-3505A
  • S/G B, MOV-3504A

-OR-o Perform the followings

a. Open intact S/G HSIV bypass valves
b. Open both priming air ejector steam inlet valves
  • V-3580 i
  • V-3581 i

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PAGE 15 of 16 l

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 23 Check If SI ACCUMs Should Be Isolated:

a. RHR loop flow indicator - AT
a. Return to Step 21.

LEAST INTERMITTENT FLOV

b. Close SI ACCUM discharge valves
b. Vent any unisolated ACCUMs:
  • ACCUM A, NOV-841
1) Open vent valves for
  • ACCUM B, NOV-865 unisolated SI ACCUHs.

'* ACCUM.A,_A0V-834A

2) Open HCV-945.
c. Locally roopen breakers for MOV-841 and MOV-865 24 Check If RCPs Should Be Stopped:
a. Both RCS hot leg temperatures -
a. Go to Step 25.

LESS THAN 325'F i

b. Stop all RCPs r

25 Verify SI Flow:

Perform the followings o _SI line loop A and B flov

a. Continue efforts to establish SI indicators - CHECK.FOR FLOV

-flow.

-OR-

b. Try to establish' charging flow.

o RHR loop flow indicator - CHECK

c. Return to Step 21.

l FOR FLOW O

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E0Pt flite REV: 6 TR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 16 of 16 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

26 Check Core Cooling:

Return to Step 21.

l o RVLIS indication.- GREATER THAN 68% [73% adverse CNMT) o RCS hot leg temperatures - LESS THAN 325'F l

27 Go to Appropriate Plant Procedure

a. Check RWST level - GREATER THAN
a. Go to ES-1.3, TRANSFER TO COLD 28%

LEG RECIRCULATION, Step 1.

b. Go to E-1, LOSS OF REACTOR OR 1

SECONDARY COOLANT, Step 17

-END-1 l

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REV -6 FR-C.1 RESPONSE TO. INADEQUATE CORE COOLING PAGE 1-of 1.

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FR-C.1 APPENDIX LIST TITLE PAGES i

1)

ATTACHMENT RCP START 1

2)

ATTACHMENT N2 PORVS

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