ML17263A614
| ML17263A614 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/30/1994 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A585 | List:
|
| References | |
| FR-C.1, NUDOCS 9404190165 | |
| Download: ML17263A614 (30) | |
Text
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 1 of 14 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT s/
)
cjoy EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
~PDR"'90165 940'414 p
ADOCK 05000244
,l i
FR-C. 1
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 2 of 14 A.
PURPOSE This procedure provides actions to restore core 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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FR-C.1
RESPONSE
TO INADEQUATE CORE COOLING REV:
9 PAGE 3 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Adverse CNMT values should be used whenever CNMT ~ressure is greater than 4 psig or CNMT radiation is greater than 10+
~ R/hr.
1 Check RWST Level GREATER THAN 28%
Perform the following:
a.
Ensure SI system aligned for cold leg recirculation using Steps 1 through 11 of ES-1.3, TRANSFER TO COLD LEG RECIRCULATION.
b.
WHEN the SI system is aligned for sump recirculation, THEN go to Step 3.
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV:
9 PAGE 4 of 14 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED CAUTION RHR PUMPS SHOULD NOT BE RUN LONGER THAN 1 HOUR WITHOUT CCW TO THE RHR HEAT EXCHANGERS.
2 Verify SI Pump And RHR Pump Emergency Alignment:
m a.
RHR pump discharge to Rx vessel deluge OPEN
~ MOV-852A
~ MOV-852B
- b. Verify SI pump C
RUNNING
- c. Verify SI pump A -
RUNNING
- d. Verify SI pump B -
RUNNING
- e. Verify both SI pump C discharge valves OPEN
~ MOV-871A
~ MOV-871B a.
Ensure at least one valve open.
- b. Manually start pump on available bus.
- c. Perform the following:
- 1) Ensure SI pumps B and C
running.
- 2) Ensure SI pump C aligned to discharge line A:
o MOV-871B closed o
MOV-871A open 3)
Go to Step 3.
- d. Perform the following:
- 1) Ensure SI pumps A and C
running.
- 2) Ensure SI pump C aligned to discharge line B:
o MOV-871B open o
MOV-871A closed 3)
Go to Step 3.
- e. Manually open valves as necessary.
F
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FR-C.1
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 5 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3 Verify SI Pump Suction aligned to RWST:
a.
SI pump suction valves from RWST OPEN
~ MOV-825A
~ MOV-825B a.
Ensure at least one SI pump suction valve from RWST open.
~ MOV-825A
~ MOV-825B
'. SI pump suction valves from BASTs CLOSED
~ MOV-826A
~ MOV-826B
~ MOV-826C
~ MOV-826D b.
Ensure at least one valve in each SI pump suction line from BAST closed.
~ MOV-826A or MOV-826B
~ MOV-826C or MOV-826D 4 Verify SI Flow In Both Trains:
o SI line loop A and B flow indicators CHECK FOR FLOW o
RHR loop flow indicator CHECK FOR FLOW Perform the following:
- a. Manually start pumps and align valves as necessary.
- b. Establish maximum charging flow.
5 Check RCP Support Conditions:
- a. Verify Bus llA or llB -
ENERGIZED b.
Check other RCP support conditions (Refer to Attachment RCP START)
Continue attempts to establish RCP support conditions.
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FR-C.1 TITLE:
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TO INADEQUATE CORE COOLING REV:
9 PAGE 6 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Check SI ACCUM Discharge Valves OPEN
~ MOV-841
~ MOV-865 IF SI ACCUM discharge valves closed after ACCUM discharge, THEN go to Step 7.
IF NOT, THEN perform the following:
~ MOV-841, MCC C position 12F
~ MOV-865, MCC D position 12C b.
Open SI ACCUM discharge valves.
~ ACCUM A, MOV-841
~ ACCUM B, MOV-865 7
Check Core Exit. T/Cs LESS THAN 1200'F Go to S tep 10.
8 Check RVLIS Indication:
a.
GREATER THAN 43%
(46% adverse CNMT]
- b. Return to procedure and step in effect
- a. IF RVLIS increasing, THEN return to Step l.
IF NOT, THEN go to Step 9.
9 Check Core Exit T/Cs:
- a. Temperature LESS THAN 700'F i
- b. Return to procedure and step in effect
- a. IF decreasing, THEN return to Step l.
IF NOT, THEN go to Step 10.
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV:
9 PAGE 7 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF OFFSITE POWER IS LOST AFTER SI 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 11 Reset CI:
a.
Depress CI reset pushbutton
- b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED
- b. Perform the following:
- 1) Reset SI.
- 2) Depress CI reset pushbutton.
NOTE:
This procedure should be continued while obtaining CNMT hydrogen sample in Step 12.
12 Check CNMT Hydrogen Concentration:
- b. Hydrogen concentration LESS THAN 0.5%
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RESPONSE
TO INADEQUATE CORE COOLING REV' PAGE 8 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 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).
o A FAULTED OR RUPTURED S/G SHOULD NOT BE USED IN SUBSEQUENT STEPS UNLESS NO INTACT S/G IS AVAILABLE.
x ****%***x ***************
NOTE:
TDAFW pump flow control valves fail open on loss of IA.
- 13 Monitor Intact S/G Levels:
a.
Narrow range level GREATER'HAN 5%
[25% adverse CNMT)
- a. Maintain total feed flow greater than 200 gpm until narrow range level greater than 5%
[25%
adverse CNMT) in at least one S/G.
IF total feed flow greater than 200 gpm can NOT be established, THEN 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 maintain narrow range level between 17%
[25% adverse CNMT) and 50%
I
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 9 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- x
% x *****
x ****x******x*****************
CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR
- x x **x x x x ***x**x********x*******x 14 Check RCS Vent Paths:
a.
Po~er to PRZR PORV block valves AVAILABLE b.
PORVs CLOSED
- a. Restore power to block valves unless block valve was closed to isolate an open PORV:
~ MOV-515, MCC C position 6C
~ MOV-516, MCC D position 6C
- b. IF PRZR pressure less than 2335 psig, THEN manually close PORVs.
IF any PORV can NOT be closed, 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 valves CLOSED
- d. Manually close valves.
~ SOV-590
~ SOV-591
~ SOV-592
~ SOV-593
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 10 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Establish Condenser Steam Dump Pressure Control:
- a. Verify condenser available:
o Intact S/G MSIV -
OPEN o
Annunciator G-15, STEAM DUMP ARMED - LIT a.
Place intact S/G ARV controller in MANUAL and go to Step 16.
- b. Place steam dump mode selector switch in MANUAL
- c. Place steam dump controller in MANUAL NOTE:
Partial uncovering of S/G tubes is acceptable in the following steps.
16 Depressurize All Intact S/Gs To 200 PSIG:
a.
Dump steam to condenser at maximum rate b.
Check S/G pressure LESS THAN 200 PSIG
- a. Manually or locally dump steam at maximum rate using S/G ARVs.
- b. IF S/G pressure decreasing, THEN return to Step 13, IF NOT, THEN go to Step 23.
c.
Check RCS hot leg temperatures BOTH LESS THAN 400'F
- c. IF RCS hot leg temperatures decreasing, THEN return to Step 13.
IF NOT, THEN go to Step 23.
d.
Stop S/G depressurization
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 11 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Check If SI ACCUMs Should Be Isolated:
a.
RCS hot leg temperatures BOTH LESS THAN 400'F a.
Go to Step 23.
- b. Verify SI reset
- c. Close SI ACCUM discharge valves
~ ACCUM A, MOV-841
. ~ ACCUM B, MOV-865
- b. Manually reset SI.
- c. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs.
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- d. Locally reopen breakers for MOV-841 and MOV-865
- 2) Open HCV-945.
18 Stop Both RCPs 19 Dump Steam to Condenser At Maximum Rate To Depressurize All Intact S/Gs To Atmospheric Pressure Manually or locally dump steam at maximum rate using S/G ARVs.
20 Verify SI Flow:
o SI line loop A and B flow indicators CHECK FOR FLOW Perform the following:
a.
Continue efforts to establish SI flow.
-OR-o RHR loop flow indicator CHECK FOR FLOW
- b. Try to establish charging flow.
- c. IF core exit T/Cs less than 1200'F, THEN return to Step 19.
IF NOT, THEN go to Step 23.
(
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FR-C.1 1'I JLE:
RESPONSE
TO INADEQUATE CORE COOLING REV 9
PAGE 12 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 21 Check Core Cooling:
a.
Core exit T/Cs LESS THAN 1200'F b.
RCS hot leg temperatures BOTH LESS THAN 320'F t
a.
Go to Step 23.
- b. Return to Step 19.
c.
GREATER THAN 68%
(73% adverse CNMT)
- c. Return to Step 19.
22 Go to Appropriate Plant Procedure a.
Check RWST level GREATER THAN 28%
b.
Go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 17 a.
Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.
NOTE:
Normal conditions are desired but not required for starting the RCPs.
23 Check Core Exit T/Cs LESS THAN 1200'F Start RCPs as necessary until core exit T/Cs less than 1200'F.
IF core exit T/Cs greater than 1200'F and all available RCPs
- running, THEN open all PRZR PORVs and block valves.
IF IA NOT available, THEN refer to Attachment N2 PORVS.
IF core exit T/Cs greater than 1200'F and all PRZR PORVs and block valves
- open, THEN open Rx vessel head vent valves.
~ SOV-590
~ SOV-591
~ SOV-592
~ SOV-593
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV:
9 PAGE 13 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Try To Locally Depressurize All Intact S/Gs To Atmospheric Pressure:
o Use intact S/G(s)
ARVs Use faulted or ruptured S/G.
-OR-o Open TDAFW pump steam supply valve from intact S/G(s)
~ S/G A, MOV-3505A
~ S/G B, MOV-3504A
-OR-o Perform the following:
a.
Open intact S/G MSIV bypass valves b.
Open both priming air ejector steam inlet valves
~ V-3580
~ V-3581 25 Check If SI ACCUMs Should Be Isolated:
a.
RHR loop flow indicator
- AT LEAST INTERMITTENT FLOW
- a. Return to Step 23.
- b. Close SI ACCUM discharge valves
~ ACCUM A, MOV-841
~ ACCUM B, MOV-865
- b. Vent any unisolated ACCUMs:
- 1) Open vent valves for unisolated SI ACCUMs.
~ ACCUM A, AOV-834A
~ ACCUM B, AOV-834B
- c. Locally reopen breakers for MOV-841 and MOV-865
- 2) Open HCV-945.
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FR-C.1 TITLE:
RESPONSE
TO INADEQUATE CORE COOLING REV' PAGE 14 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 26 Check If RCPs Should Be Stopped:
a.
Both RCS hot leg temperatures LESS THAN 320'F a.
Go to Step 27.
o SI line loop A and B flow indicators CHECK FOR FLOW Perform the following:
a.
Continue efforts to establish SI flow.
-OR-o RHR loop flow indicator CHECK FOR FLOW
- b. Try to establish charging flow.
- c. Return to Step 23.
28 Check Core Cooling:
o RVLIS indication
- GREATER THAN 68%
[73% adverse CNMT) o RCS hot leg temperatures LESS
, THAN 320'F Return to Step 23.
29 Go to Appropriate Plant Procedure a.
Check RWST level GREATER THAN 288 b.
Go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 17 a.
Go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.
-END-
/
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FR-C.1
RESPONSE
TO INADEQUATE CORE COOLING REV:
9 PAGE 1 of 1 FR-C.1 APPENDIX LIST TITLE 1)
ATTACHMENT RCP START 2)
ATTACHMENT N2 PORVS PAGES