ML20198C041

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Rev 16 to FR-C.1, Response to Inadequate Core Cooling
ML20198C041
Person / Time
Site: Ginna Constellation icon.png
Issue date: 12/14/1998
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17265A479 List:
References
FR-C.1, NUDOCS 9812210284
Download: ML20198C041 (19)
v • d • e


Text

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llM, gl REV: 16 i

4 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING 4

PAGE 1 of 18 OV ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER kb (Nblmh o

RESPONSIBLE @ AGER l2-/4-0f EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

O D

9812210284 981214 PDR ADOCK 05000244 P

PDR L

_.. = = _ _

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING i

PAGE 2 of 18 O

A.

PURPOSE - This procedure provides actions to restore core cooling.

B.

ENTRY CONDITIONS / SYMPTOMS 1.

ENTRY CONDITIONS - This procedure is entered from:

I a.

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

O

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REV: 16 ER-C.1 RESPONSE TO INADEQUATE CORE COOLING 1

PAGE 3 of 18 OO ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP NDIE: Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+05 R/hr.

  • 1 Monitor RWST Level - GREATER Perform the following:

THAN 28%

a. Ensure SI system aligned for cold leg recirculation using Steps 1 through 13 of ES-1.3.

TRANSFER TO COLD LEO RECIRCULATION.

b. )[HE_H the SI system is aligned for sump recirculation. IHEH go to Step 4.

2 Verify SI Pump Suction Aligned to RWST:

a. Verify SI pump suction valves
a. Ensure at least one SI pump from RWST - OPEN suction valve from RWST open.
  • MOV-825A

= MOV-825B e MOV-825B a

4

!b

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING S

PAGE 4 of 18 t' %

b ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP l

CAUTION RHR PUMPS SHOULD NOT BE RUN LONGER THAN 1 HOUR WITHOUT CCW TO THE RHR HEAT EXCHANGERS.

I 1

3 Verify SI Pump And RHR Pump Emergency Alignment:

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

i deluge - OPEN e MOV-852A

  • MOV-852B l
b. Verify both RHR pumps - RUNNING
b. Manually start pumps
c. Verify SI pump C - RUNNING
c. Manually start pump on available
bus,
d. Verify SI pump A - RUNNING
d. Perform the following:

O

1) Ensure SI pumps B and C running.
2) Ensure SI pump C aligned to discharge line A:

o MOV-871B closed l

o MOV-871A open

3) Go to Step 4.
e. Verify SI pump B RUNNINC
e. Perform the following:
1) Ensure SI pumps A and C l

running.

2) Ensure SI pump C aligned to discharge line B:

o MOV-871B open o MOV-871A closed l

3) Go to Step 4.
f. Verify both SI pump C discharge
f. Manually open valves as valves - OPEN necessary.

MOV-871A

. MOV-871B Os i

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING

-4 PAGE 5 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 4 Verify SI Flow In Both Trains:

Perform the following:

l o SI line loop A and B flow

a. Manually start pumps and align i

indicators - CHECK FOR FLOW valves as necessary.

o RHR loop flow indicator - CHECK

b. Establish maximum charging flow.

FOR FLOW J

l 5 Check RCP Support Conditions:

a. Verify Bus 11A or 11B - ENERGIZED
a. Restore power to Bus 11A or 11B d

(Refer to ER-ELEC.1, RESTORATION OF OFFSITE POWER).

b. Check other RCP support
b. Continue attempts to establish conditions (Refer to Attachment RCP support conditions.

RCP START) 6 Check SI ACCUM Discharge J.E SI ACCUM discharge valves closed i

J

. Valves - OPEN after ACCUM discharge, THEN go to Step 7.

IF NOT, THEN perform the l-

. MOV-841 following:

. MOV-865

a. Dispatch A0 with locked valve key to locally close breakers for SI ACCUM discharge valves.

. MOV-841, MCC C position 12F MOV-865, MCC D position 12C e

b. Open SI ACCUM discharge valves.

= ACCUM A. MOV-841

. ACCUM B, MOV-865 1

i C

Y 4

-. ~

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING 4.

PAGE 6 of 18 i

O ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 7 Check Core Exit T/Cs - LESS Go to Step 10.

THAN 1200 F 8 Check RVLIS Indication:

a. RCPs - BOTH SECURED a.~ Return to procedure and step in effect
b. RVLIS level - GREATER THAN 52%
b. E RVLIS increasing. IILEN return

[55% adverse CNMT]

to Step 1.

IF NOT, IllEN go to Step 9.

j

c. Return to procedure and step in i

effect 9 Check Core Exit T/Cs:

a. Temperature - LESS THAN 700* F
a. E decreasing, THEN return to O)

Step 1.

IF NOT, THEN go to

(

Step 10.

b. Return to procedure and step in effect

.......................................c CAUTION IF OFFSITE POWER IS LOST AFTER 51 RESET. THEN SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G. MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

10 Reset SI O

~

~-

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l REV: 16 l

FR-C.1 RESPONSE TO INADEQUATE CORE COOLING l

PAGE 7 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

STEP l

l t

11 Reset CI:

a. Depress CI reset pushbutton l-
b. Verify annunciator A-26 CNMT
b. Perform the following:

l ISOLATION - EXTINGUISHED

1) Reset SI.
2) Depress CI reset pushbutton.

l NOTE: This procedure should be continued while obtaining CNMT hydrogen sample in Step 12.

12 Check CNMT Hydrogen Concentration:

a. Direct RP to start CNMT hydrogen monitors as necessary l

['i

b. Hydrogen concentration - LESS
b. Consult TSC to determine if V

THAN 0.5%

hydrogen recombiners should be placed in service.

i l

l

{

6 I

l

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 8 of 18 n

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

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

INTACT S/G IS AVAILABLE.

HQIE: TDAFW pump flow control valves fail open on loss of IA.

  • 13 Monitor Intact S/G Levels:
a. Narrow range level - GREATER
a. Maintain total feed flow greater THAN 5% [25% adverse CNMT) than 200 gpm until narrow range level greater than 5% [25%

adverse CNMT} in at least one

~

If total feed flow greater than 200 gpm can HQI be established, IHEH perform the following:

1) Continue attempts to establish a heat sink in at least one S/G (Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
2) Go to Step 23.
b. Control feed flow to mainta2n narrow range level between 11%

[25% adverse CNMT] and 50%

/

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REV: 16 FR-C.1-RESPONSE TO INADEQUATE CORE COOLING l

s PAGE 9 of 18 l

.O V

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP j

l CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR PRESSURE. IT SHOULD BE CLOSED AFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 14B).

l l

14 Check RCS Vent Paths:

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

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

l

. MOV-515. MCC D position 6C l

. MOV-516. MCC C position 6C l

b. PORVs - CLOSED
b. H PRZR pressure less than 2335 psig. THEN manually close PORVs.

! Q b

H any PORV can NOT be closed.

l THEN manually close its block valve.

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

CLOSED

. S0V-590

. S0V-591

. S0V-592

. SOV-593 l

l i

i I

- - ~.

. ~ _. -.

_. -. _. =.

..____m.

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TITLE:

REV: 16 E'R-C.1 -

-RESPONSE TO INADEQUATE CORE COOLING PAGE 10 of 18 t-

/^

G' ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 15 Establish Condenser Steam Dump Manual Control

a. Verify condenser available:
a. Place intact S/G ARV controller in MANUAL and go to Step 16.

o Intact S/G MSIV - OPEN o Annunciator G-15. STEAM DUMP ARMED - LIT

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

N0IE.

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

Q 16 Depressurize All Intact S/Gs 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. IE S/G pressure decreasing. THEN 200 PSIG return to Step 13.

IF NOT. TEEN go to Step 23.

c. Check RCS hot leg temperatures
c. IE RCS hot leg temperatures BOTH LESS THAN 400*F decreasing. THEN return to Step 13.

IF NOT TEEN go to Step 23.

I

d. Stop S/G depressurization i

i 1

C\\

U i

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REV: 16

.FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 11 of 18 i G

.O ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 17 Check If SI ACCUMs Should Be Isolated:

j

a. RCS hot leg temperatures - BOTH
a. Go to Step 23.

LESS THAN 400* F

b. Dispatch A0 with locked valve key to locally close breakers i

for SI ACCUM discharge valves if l-necessary l

  • MOV-841 MCC C position 12F MOV-865 MCC D position 12C e
c. Verify SI reset
c. Manually reset SI.
d. Close SI ACCUM discharge valves
d. Perform the following:
  • ACCUM A, MOV-841
1) Reset CI.
2) Ensure two air compressors running.

l-

3) Establish IA to CNMT.

l

4) Open vent valves for l

unisolated SI ACCUMs.

5) Open HCV-945.

l

e. Locally reopen breakers for MOV-841 and MOV 865 t

i l

~....... -.

-. ~. - -

^*'

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REV: 16 FR-C.1' RESPONSE TO INADEQUATE CORE COOLING l

PAGE 12 of 18 i

v ACTION / EXPECTED RESPONSE RESPONSENOTOBTAINEDl j-STEP l

l 18'Stop Both RCPs 19 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 Atmospheric Pressure 20 Verify SI Flow:

Perform the following:

i-o SI line loop A and B flow

a. Continue efforts to establish SI indicators - CHECK FOR FLOW flow.

-OR-

b. Try to establish charging flow.

o RHR loop flow indicator - CHECK

c. J.E core exit T/Cs less than FOR FLOW 1200* F. THEN return to Step 19.

IF NOT, THEN go to Step 23.

21 Check Core Cooling:

a. Core exit T/Cs - LESS THAN 1200* F
a. Go to Step 23,
b. RCS hot leg temperatures BOTH
b. Return to Step 19.

LESS THAN 320*F

c. RVLIS level (no RCPs)

CREATER

c. Return to Step 19.

THAN 77% [82% adverse CNMT]

l t

'AV c

l I

....-.. - - ~.

. ~.-.....-.

~. - -..

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TITLE:

i REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 13 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 1

4 s

I 22 Go to Appropriate Plant Procedure l

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 SECONDARY COOLANT. Step 17 i

j i

)

l i.

1 i

i o 4

W n

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE C3RE COOLING PAGE 14 of 18 g- -

(

j ACTION / EXPECTED RESPONSE RESPCNSE NOT OBTAINED STEP

}LQIE: Normal conditions are desired but not required for starting the RCPs.

23 Check If RCPs Should Be Started:

a. Core Exit T/Cs - GREATER THAN
a. Go to Step 24.

1200* F l

b. Check if an idle RCS cooling
b. Perform the following:

loop is available

1) Reset SI.

o Narrow range S/G 1evel -

GREATER THAN 5% (25% adverse

2) Reset CI.

CNMT]

l

3) Ensure two air compressors o RCP in associated loop -

running.

AVAILABLE AND NOT OPERATING l

4) Establish IA to CNMT.
5) Open all PRZR PORVs and block valves a) H any block valve can NOI be opened. THEN ensure f-power supplied to block valve.

l b) H IA NOT available. TjiEN refer to Attachment N2 PORVS.

l

6) H core e.'it T/Cs remain greater than 1200*F. THEN l

open Rx vessel head vent valves.

SOV-590

. SOV-591 S0V-592 S0V-593

=

7) Go to Step 24.
c. Start RCP in one 2dle RCS cooling loop
d. Return to Step 23a l

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1 REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING, PAGE 15 of 18

-a

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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 24 Try To Locally Depressurize Use faulted or ruptured S/G.

All Intact S/Gs To Atmospheric Pressure:

o Use intact S/G(s) ARVs 0R-o Open TDAFW pump steam supply valve from intact S/G(s)

. S/G A, MOV-3505A j

S/G B, MOV-3504A e

-0R-Perform the following:

o

a. Open intact S/G MSIV bypass valves
b. Open both priming air ejector i

steam inlet valves

)

. V-3580 e V-3581 25 Check Core Exit T/Cs - LESS J_E core exit temperatures THAN 1200 F decreasing. THEN return to step 23.

lE core exit temperatures increasing. THEN go to SACRG-1.

SEVERE ACCIDENT CONTROL ROOM GUIDELINE INITIAL RESPONSE step 1.

-(

.~

(

TOP:

TITLE.:

REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 16 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 26 Check If SI ACCUMs Should Be Isolated:

l l

a. RHR loop flow indicator - AT.
a. Return to Step 23.

LEAST INTERMITTENT FLOW

b. Dispatch A0 with locked valve key to locally close breakers for SI ACCUM discharge valves if necessary

. MOV-841 MCC C position 12F

= MOV-865 MCC D position 12C

c. Reset SI.

l I

d. Close SI ACCUM discharge valves
d. Perform the following:

l t

= ACCUM A. MOV-841

1) Reset CI.

l

  • ACCUM B. MOV-865 lt
2) Ensure two air compressors l

running.

L

3) Establish IA to CNMT.
4) Open vent valves for unisolated SI ACCUMs.

i l'

= ACCUM A. A0V-834A

l

5) Open HCV-945.
e. Locally reopen breaker.n for MOV-841 and MOV 865 i-l l

I i

l l

i LO

_. ~,.

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING j,

PAGE 17 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 27 Check If RCPs Should Be Stopped:

a. Both RCS hot leg temperatures -
a. Go to Step 28.

LESS THAN 320'W

b. Stop all RCPs 28 Verify SI Flow:

Perform the following:

o SI line loop A and B flow

a. Continue efforts to establish SI indicators - CHECK FOR FLOW flow.

-OR-

b. Try to establish charging flow, o RHR loop flow indicator CHECK
c. Return to Step 23.

FOR FLOW O%

29 Check Core Cooling:

a. RCPs - BOTH SECURED
a. Return to Step 23.
b. RCS hot leg temperatures LESS
b. Return to Step 23.

THAN 320'F

c. RVLIS level CREATER THAN 71%
c. Return to Step 23.

(82% adverse CNMTl i

l l

.__.__._._..__.._._._...._.m.

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 18 of 18

O ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP t

1 30 Go to Appropriate Plant Procedure

a. IE PRZR FORVs and head vents were opened in Step 23.

THEN consult TSC.to evaluate long 4

term status AND continue with l

transitions.

1 i

b. Check RWST level - GREATER THAN
b. Go to ES-1.3, TRANSFER TO COLD l

28%

LEG RECIRCULATION. Step 1.

4

c. Go to E-1. LOSS OF REACTOR OR SECONDARY COOLANT, Step 17.

I

-CND-I i

4 O

4 t

i 1

i 5

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. -... -.... - -.. ~.. ~ - -. ~. - - - -., -

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REV: 16 FR-C.1 RESPONSE TO INADEQUATE CORE COOLING PAGE 1 of 1 i

FR-C.1 APPENDIX LIST

)

TITLE 1)

ATTACHMENT RCP START (AU-15.0)

2). ATTACHMENT N2 PORVS (AM-12.0) l l

O i

I i!O

-.

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