ML17250B138
| ML17250B138 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/09/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17250B096 | List:
|
| References | |
| FR-S.1, NUDOCS 9004200762 | |
| Download: ML17250B138 (22) | |
Text
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FR-S.1 TITLE:
RESPONSE
TO REACTOR RESTART/ATWS REV:
4 PAGE 1 of 10 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE P
NT SUPERIN EN NT EFFE TIVE DATE GINNASTATION "IAP)
QA NON-QA REVIEWED BY:
PDR ADOC[C 05000244 P
CATEGORY 1.0 DATE TIME COMPLE I ED:
DATE TIME:
0
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FR-S.1
RESPONSE
TO REACTOR RESTART/ATWS REV:
4 PAGE 2 of 10 A.
PURPOSE This procedure provides actions to add negative reactivity to a core which is observed to be critical when expected to be shut'own.
B.
ENTRY CONDITIONS/SYMPTOMS l.
ENTRY CONDITIONS This procedure is entered from:
a.
E-O, REACTOR TRIP OR SAFETY INJECTION, when reactor trip is not verified and manual trip is not effective.
b.
F-0.1, SUBCRITICALITY Critical Safety Function Status Tree on either a
RED or ORANGE condition.
IP
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FR-S.1
RESPONSE
TO REACTOR RESTART/ATWS REV:
4 PAGE 3 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o Steps 1 through 4 are IMMEDIATE ACTION steps.
o Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10
~ R/hr.
O 1
Verify Reactor Trip:
o At least one train of reactor trip breakers OPEN o
Neutron flux - DECREASING o
MRPI indicates
- ALL CONTROL RODS ON BOTTOM Manually trip reactor.
IF reactor trip breakers NOT open, THEN manually insert control rods.
O 2
Verify Turbine Stop Valves CLOSED Manually trip turbine.
IF turbine trip can NOT be
- verified, THEN close both MSIVs.
O 3
Check AFW Pumps Running:
a.
MDAFW pumps - RUNNING b.
TDAFV pump - RUNNING IF NECESSARY
- a. Manually start MDAFV pumps.
- b. Manually open steam supply valves.
~ MOV-3505A
~ MOV-3504A
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FR-S.1 TITLE:
RESPONSE
TO REACTOR RESTART/ATWS REV:
4 PAGE 4 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE: If offsite power is lost coincident with SI, then MCC C and MCC D lockout relays must be reset to restore BA and RMW pumps.
O 4
Initiate Emergency Boration Of RCS:
a.
Check RCS pressure
- GREATER THAN 1400 psig [1200 psig adverse CNMT]
- b. Verify at least one charging pump - RUNNING
- c. Align boration path:
- 1) Start two BA transfer pumps
- 2) Open MOV-350
- 3) Verify BA flow
- d. Verify charging flow path:
o Charging valve to loop B cold leg (AOV-294) - OPEN A
o Charging flow control valve (HCV-142) - DEMAND AT 0%
e.
Check PRZR PORV status o
RCS pressure
- LESS THAN 2335 PSIG o
PORVs - CLOSED
- a. IF SI flow indicated, THEN go to Step 5.
IF NOT, THEN go to Step 4b.
- b. Perform the following:
- 1) Reset SI if necessary.
- 2) Start one charging pump.
- c. IF flow can NOT be established, THEN refer to AP-CVCS.2, IMMEDIATE BORATION.
- d. Manually align valves.
IF IA to CNMT isolated, THEN verify alternate charging valve, (AOV-392A), relieving to RCS.
- e. Verify CNMT ventilation isolation.
IF dampers NOT
o Annunciator F-19, PRZR PORV OUTLET HI TEMP - EXTINGUISHED
0 0
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FR-S. 1 TITLE:
RESPONSE
TO REACTOR RESTART/ATWS REV:
4 PAGE 5 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5
Check If The Following Trips Have Occurred:
- a. Reactor trip
- a. Dispatch AO to locally trip reactor:
o Trip MG set breakers at bus 13 and bus 15.
- b. Turbine trip o
Open reactor trip breakers locally.
- b. Dispatch operator to locally trip turbine using manual trip lever on west end of HP turbine.
6 Check S/G Level:
- a. Narrow range level in at least one S/G - GREATER THAN 5X [25X adverse CNMT]
- a. Perform the following:
- 1) Verify total feed flow greater than 400 gpm.
IF NOT, THEN manually start pumps and align valves as necessary.
- 2) Maintain total feed flow greater than 400 gpm until narrow range level greater than 5X [25X adverse CNMT] in at least one S/G.
- b. Control feed flow to maintain narrow range level between 17X
[25X adverse CNMT] and 50X
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FR-S.1
RESPONSE
TO REACTOR RESTART/ATWS REV 4
PAGE 6 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7 Verify Dilution Paths ISOLATED Manually isolate dilution paths.
o Place RMW mode switch to BORATE o
Verify RMV to blender (HCV-111)
- CLOSED o
Verify RMV pumps OPP 8
Check For Reactivity Insertion From Uncontrolled RCS Cooldown:
Stop any controlled cooldown and go to Step 14.
o Core exit T/Cs - DECREASING IN AN UNCONTROLLED MANNER
-OR-o Any S/G pressure
- DECREASING IN AN UNCONTROLLED MANNER 9
Check MSIVs CLOSED Manually close valves.
10 Verify MFW Isolation:
a.
MPV pumps - TRIPPED b.
MFW flow control valves - CLOSED
~ MFV regulating valves
~
MPW bypass valves
- a. Manually close MFV pump discharge valves and trip MFW pumps.
- b. Place A and B S/G MPV regulating valve and bypass valve controllers to MANUAL at OX demand.
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FR-S.1 TITLE:
P
RESPONSE
TO REACTOR RESTART/ATWS REV 4
PAGE 7 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED ll Identify Faulted S/G:
o ANY S/G PRESSURE DECREASING IN AN UNCONTROLLED MANNER Go to Step 14.
-OR-o ANY S/G COMPLETELY DEPRESSURIZED
I 0
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FR-S.1 TITLE:
RESPONSE
TO REACTOR RESTART/ATWS REV 4
PAGE 8 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
AT LEAST ONE S/G MUST BE MAINTAINEDAVAILABLEFOR RCS COOLDOWN.
o IF BOTH S/GS ARE FAULTED, AT LEAST 50 GPM PEED FLOW SHOULD BE MAINTAINED TO EACH S/G.
12 Isolate Feed Flow To Faulted S/G:
o Close faulted S/G MDAFW pump discharge valve
~ S/G A, MOV-4007
~ S/G B, MOV-4008 o
Pull stop faulted S/G MDAFW pump o
Close faulted S/G TDAPW flow control valve
~ S/G A, AOV-4297
~ S/G B, AOV-4298 o
Verify faulted S/G MFW regulating valve and bypass valve - CLOSED Manually close valves.
IP valves can NOT be closed, THEN dispatch AO to locally isolate flowpaths as necessary.
~ S/G A, HCV-466 and HCV-480
~ S/G B, HCV-476 and HCV-481 o
Verify MFW pump discharge valves CLOSED
~ S/G A, MOV-3977
~ S/G B, MOV-3976 o
Verify MDAFW pump crosstie valves - CLOSED
~ MOV-4000A
~ MOV-4000B
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FR-S.1 TITLE:
RESPONSE
TO REACTOR RESTART/ATWS REV' PAGE 9 of 10 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED 13 Isolate Steam Flow From Faulted S/G:
o Verify faulted S/G ARV - CLOSED
~ S/G A, AOV-3411
~.S/G B, AOV-3410 o
Close faulted S/G TDAFV pump steam supply valve and place in PULL STOP Manually close valves.
IP valves can NOT be closed, THEN dispatch AO to locally isolate flowpaths as necessary.
~ S/G A, MOV-3505A
~ S/G B, MOV-3504A o
Verify faulted S/G blowdown and sample valves
- CLOSED
~ S/G A, AOV-5738 and AOV-5735
~ S/G B, AOV-5737 and AOV-5736 o
Dispatch AO to complete faulted S/G isolation (Refer to Attachment FAULTED S/G) 14 Verify Reactor Subcritical:
o Power range channels
- LESS THAN 5'
Intermediate range channels startup rate - NEGATIVE Perform the following:
- a. Continue to borate.
- b. IF boration NOT available, THEN allow RCS to heat up.
Perform actions of other FR procedures in effect which do NOT cooldown or otherwise add positive reactivity to the core.
c.-Return to Step 4.
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FR-S.1
RESPONSE
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4 PAGE 10 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION BORATION SHOULD CONTINUE TO OBTAIN ADEQUATE SHUTDOWN MARGIN DURING SUBSEQUENT ACTIONS.
15 Return to Procedure And Step In Effect
-END-
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FR-S.1
RESPONSE
TO REACTOR RESTART/ATWS REV 4
PAGE 1 of 1 FR-S.1 APPENDIX LIST TITLE 1)
ATTACHMENT FAULTED S/G PAGES
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