ML17264A820
| ML17264A820 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 02/06/1997 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17264A821 | List: |
| References | |
| AP-RCC.2, NUDOCS 9702190175 | |
| Download: ML17264A820 (59) | |
Text
AP-RCC.2 RCC/RPI MALFUNCTION REV:
7 PAGE 1 of 7 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSIBLE AGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
9702i90i75 9'70206 PDR ADQCK 05000244 F
~ I
EOP:
AP-RCC.2 RCC/RPI MALFUNCTION REV 7
PAGE 2 of 7 A.
PURPOSE This procedure provides the steps necessary to continue plant operation while investigating an RCC/RPI malfunction.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of RCC/RPI MALFUNCTION are; a.
Annunciator C-5, PPCS ROD SEQUENCE OR ROD DEVIATION lit, or b.
Power range NIS indicate a flux tilt, or c ~
d 0 Group step counters for any individual bank are not within 1 step of each other, or Incore flux map indicates abnormal flux tilt, or e.
Incore thermocouples indicate abnormal power tilt, or f.
Individual rods are not within +/- 12 steps of their respective step counters as indicated on MRPI, or g.
Annunciator F-29, PPCS AXIAL OR QUADRANT POWER TILT, lit, or, h.
Annunciator C-29, MRPI SYSTEM FAILURE.
I
EOP:
AP-RCC.2" RCC/RPI MALFUNCTION REV 7
PAGE 3 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF AT ANY TIME.DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
1 Place Rod Control Bank Selector Svitch - TO MANUAL CAUTION o
BANK ROD WITHDRAWAL SHOULD NOT BE PERFORMED UNTIL DIRECTED PER APPLICABLE RECOVERY PROCEDURE.
o UNTIL THE MRPI SYSTEM IS KNOWN TO BE AT FAULT, A ROD INDICATING GREATER THAN i 12 STEPS FROM ITS GROUP STEP COUNTER SHOULD BE CONSIDERED A MISALIGNED ROD.
2 Check Dropped Rod Indication:
o Annunciator E-28, POWER RANGE ROD DROP ROD STOP 5%/5 SECONDS EXTINGUISHED o
Annunciator C-14, ROD BOTTOM ROD
'STOP
- EXTINGUISHED IF the following conditions or indications of a dropped rod exist, THEN go to AP-RCC.3, DROPPED ROD RECOVERY.
o Reactor Power
- decreasing o
Tavg - decreasing IF NOT, THEN go to Step 3.
AP-RCC.2 TITLE:
RCC/RPI MALFUNCTION REV:
7 PAGE 4 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3
Check Control Rod Alignment:
- a. Verify all rods in affected group
- WITHIN + 12 STEPS OF ASSOCIATED GROUP STEP COUNTER
- a. Refer to ITS Section 3.1.4 and go to Step 4.
b.
Go to Step 6
NOTE:
Step 4 is an attempt to determine whether a rod is misaligned or whether the MRPI System is malfunctj.oning.
4 Check QPTR - LESS THAN 1.02 IF QPTR greater than 1.02, THEN computer value should be verified using 0-6.4 to prevent action based on failed computer inputs.
NOTE:
The incore flux mapping system may aid in evaluating rod alignment depending on rod location.
5 Evaluate Control Rod Operability:
- a. Verify adequate shutdown margin (Refer to 0-3.2, SHUTDOWN MARGIN FOR AN OPERATING REACTOR)
- b. Direct I&C to locally investigate rod failure c.
Rod failure identified and corrected
- MISALIGNED ROD MOVEABLE
- a. Borate and reduce turbine load as necessary.
- c. Consult Reactor Engineer and ITS section 3.1.4 for operational concerns
- d. Restore misaligned rod (Refer to ER-RCC.2, RESTORING A MISALIGNED ROD)
EOP:
AP-RCC.2 RCC/RPI MALFUNCTION REV:
7 PAGE 5 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Veri.fy Affected Group Step Counters Operable:
- a. Affected bank group step counter movement
- CONSISTANT WITH MRPI TRANSITIONS (Evaluate affected bank using PT-1, ROD CONTROL SYSTEM)
Refer to ITS section 3.1.7 for required actions.
b.
Group step counters for affected bank
- WITHIN 1 STEP OF EACH OTHER NOTE:
IF the MRPI CRTfails, THEN the PPCS can be used for rod position indication until the CRT is made operable.
Rod position indication can be retrieved from the PPCS using the blue CBAW key.
7 Verify All Individual Rod Position Indication Per Bank Operable:
o MRPI system NO MRPI SYSTEM ALARMS o
MRPI system NO KNOWN PROBLEMS WITH MRPI SYSTEM THAT COULD RENDER ROD POSITION INDICATION INOPERABLE Refer to ITS section 3.1.7 for required action.
I
EOP:
AP-RCC.2 RCC/RPI MALFUNCTION REV:
7 PAGE 6 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF
- a. Insert control rods or, if necessary, decrease turbine load to match Tavg 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.l, ABNORMAL PRESSURIZER 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.
Rod insertion limit alarms EXTINGUISHED
- d. Borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
e.
NIS PR EI - WITHINi 5%
OF TARGET VALUE
- e. Borate/dilute to restore BI to within limits.
9 Evaluate Plant Conditions:
a.
Rod/HRPI malfunction - REPAIRED
- b. Verify control rod operability-OPERABILITY RESTORED (Refer to PT-1, ROD CONTROL SYSTEM)
- a. Return to Step 4.
- b. Refer to ITS section 3.1,4 and consult plant staff for further guidance.
EOP:
AP-RCC.2 RCC/RPI MALFUNCTION REV:
7 PAGE 7 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
10 Notify Higher Supervision 11 Return To Procedure Or Guidance In Effect
-END-
EOP:
AP-RHR. 1 LOSS OF RHR REV:
15 PAGE 1 of 13 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSI E MANAGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
EOP:
AP-RHR.1 LOSS OF RHR REV:
15 PAGE 2 of 13 A.
PURPOSE This procedure provides guidance in the event of a loss of RHR cooling at or above normal loop levels.
(i.e.
RCS loop levels of 64 inches or greater)
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from; a.
FR-C.3,
RESPONSE
TO SATURATED CORE COOLING, or b.
AP-ELEC.3, LOSS OF 12A AND/OR 12B TRANSFORMER (BELOW 350'),
when RHR flow can NOT be restored, or c.
AP-CCW.3, LOSS OF CCW PLANT SHUTDOWN when CCW is inadequate for RHR cooling 2.
SYMPTOMS The following are symptoms of LOSS OF RHR; a.
No RHR pumps running, or b.
Annunciator A-20, RESIDUAL HEAT REMOVAL LOOP LO FLOW 2900 GPM (Set at 400 GPM per 0-2.2 in RHR Cooling mode), lit, or c.
Unexpected increase in temperature while on RHR cooling, or d.
Erratic or no flow on FI-626, RHR Loop Flow, or e.
Annunciator J-9, SAFEGUARD BREAKER TRIP, lit.
EOP:
AP-RHR.1 TITLE:
LOSS OF RHR REV:
15 PAGE 3 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 0
0 4
1 4
1 4
4
- t 4
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1 4
~
4 0
1 4
1 1
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CAUTION DO NOT START ANOTHER RHR PUMP UNTIL THE CAUSE OF THE ABNORMAL RHR INDICATIONS HAS BEEN DETERMINED.
IF A RUNNING PUMP HAS TRIPPED FOR REASONS OTHER THAN LOSS OF SUCTION FLOW.
THEN REDUNDANT PUMP MAY BE STARTED.
NOTE:
Conditions should be evaluated for site contingency reporting (Refer to EPIP-1.0, GINNA STATION EVENT EVALUATION AND CLASSIFICATION).
1 Check PRZR Wide Range Level GREATER THAN 0 INCHES IF RCS loop level indicator in service and loop level less than 64 inches.
THEN go to AP-RHR.2.
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS.
EOP:
AP-RHR.l LOSS OF RHR REV:
15 PAGE 4 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2 Check If RHR Pump(s)
Should Be Stopped:
a.
RHR pump ANY RUNNING b.
Check RHR pump flow - LESS THAN 1500 GPM PER PUMP c.
RHR pumps cavitating:
o RHR pump flow - OSCILLATING
-OR" a.
Go to Step 3.
- b. Decrease RHR flow as necessary.
IF RHR flow can NOT be controlled, THEN perform the following:
- 1) Stop running RHR pump.
- 2) Dispatch an AO with a locked valve key to locally throttle RHR Hx outlet valves to approximately half open.
~
A RHR Hx, HCV-625 handwheel
~
B RHR Hx, HCV-624 handwheel
- 3) Start an RHR pump.
c.
Go to Step 17.
- APPROXIMATELY ZERO (PPCS group GD NPSH)
- d. Stop RHR pumps
0
EOP AP-RHR.l TITLE:
LOSS OF RHR REV 15 PAGE 5 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
DO NOT INITIATE ANY ACTIONS WHICH MAY ADD POSITIVE REACTIVITY TO THE CORE.
o NOTIFY S/G OFFICE THAT CNMT BREATHING AIR MAY BE LOST.
o IF REFUELING IN PROGRESS, THEN STOP REFUELING OPERATIONS (NOTIFY REFUELING SRO).
~
~
1
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4 1
1 4 t t 1
1 1
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4 0 I
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- t
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1 1
1 I 1 I 0 i 4 I NOTE:
Personnel remaining in CNMT to assist in event mitigation should consult Health Physics for changes in radiological concerns.
3 Initiate Actions To Protect Personnel In CNMT:
a.
Evacuate non-essential personnel from CNMT
- b. Verify all available CNMT RECIRC fan(s)
RUNNING
- c. Initiate monitoring of CNMT area and process radiation monitors
- d. Verify CNMT penetrations with direct access to outside atmosphere CLOSED (Refer to Attachment CNMT CLOSURE)
- b. Manually start available CNMT RECIRC fans.
- c. Refer to appropriate alarm response procedures for required actions.
- d. Within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
close all CNMT penetrations to outside atmosphere.
EOP:
AP-RHR. 1 LOSS OF RHR REV:
15 PAGE 6 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Check RHR Cooling Valve Alignment NORMAL (Refer to Attachment NORMAL RHR COOLING)
Manually or locally align valves as necessary.
CAUTION THE RHR HX OUTLET VALVES (HCV-624 AND HCV-625) WILL FAIL OPEN ON LOSS OF INSTRUMENT AIR PRESSURE.
5 Check IA System:
- a. Verify 2 IA compressors RUNNING b.
Check IA supply o
Pressure GREATER THAN 60 PSIG o
Pressure STABLE OR INCREASING
- a. Manually start IA compressors as necessary (75 kw each).
IF IA compressors can NOT be started
- manually, THEN dispatch AO to locally reset and start compressors (75 kw each).
- b. IF IA pressure can NOT be restored.
THEN perform the following:
- 1) Dispatch AO with a locked valve key to locally throttle RHR Hx outlet valves to approximately half open.
~
A RHR Hx, HCV-625 handwheel
~
B RHR Hx, HCV-624 handwheel 2)
WHEN conditions permit, THEN refer to AP-IA.l, LOSS OF INSTRUMENT AIR, to restore IA.
EOP:
AP-RHR.1 TITLE:
LOSS OF RHR REV 15 PAGE 7 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- 6 Monitor RCS Temperature GREATER THAN 200 F
Perform the following:
b.
Go to step 8.
1
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4
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1 4
4 0
4
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1 0
1 1
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CAUTION o
CHANGES IN RCS PRESSURE COULD RESULT IN INACCURACIES IN RCS LOOP LEVEL INDICATION o
UNSTABLE OR FLUCTUATING LEVEL INSTRUMENTS SHOULD NOT BE RELIED ON FOR INDICATION OF RCS INVENTORY.
7 Verify RCS Intact:
o PRZR level GREATER THAN 5% AND STABLE o
RCS pressure STABLE o
RCS subcooling based on core exit T/Cs GREATER THAN O' USING FIGURE MIN SUBCOOLING o
RCS vent paths CLOSED Perform the following:
- a. Verify charging line flow control valve, HCV-142.
open as necessary.
- b. Ensure charging line valve to loop B cold leg, AOV-294. open.
- c. Start charging pumps as necessary.
- d. Control charging pump speed and letdown flow as necessary to stabilize RCS conditions.
~
PRZR pressure
~
PRZR level
~ Loop level IF charging flow greater than 75 gpm with letdown isolated OR unable to verify RCS inventory.
THEN go to AP-RCS.4.
SHUTDOWN LOCA.
EOP:
AP-RHR.1 LOSS OF RHR REV:
15 PAGE 8 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Establish Conditions To Start RHR Pump:
a.
RHR pump
- AVAILABLE
,o CCW pumps
- AT LEAST ONE RUNNING o
CCW to RHR Hxs, MOV-738A AND MOV-738B -
OPEN AS NECESSARY
- c. Close RHR pump flow control valves (controllers at 100%
demand)
~ HCV-624
~ HCV-625 a.
Perform the following:
- 1) Start trending core exit TCs.
- 2) IF RCS closed, THEN go to Step 10.
IF RCS open to atmosphere, THEN go to Step 16'.
- b. Perform the following:
- 1) Ensure at least one CCW pump running.
2)
Open MOV-738A and MOV-738B as necessary.
IF CCW can NOT be restored, THEN continue with Step 9 while attempting to restore CCW (Refer to AP-CCW.3, LOSS OF CCW PLANT SHUTDOWN).
- d. Place RHR Hx bypass valve, HCV-626, to MANUAL and close valve
EOP:
AP-RHR.1 TITLE:
LOSS OF RHR REV:
15 PAGE 9 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
~
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4
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1 0 f 1 f
~
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1 l 4
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CAUTION STARTING AN RHR PUMP MAY RESULT IN AN RCS LEVEL OR PRESSURE DECREASE DUE TO SHRINK OR VOID COLLAPSE.
9 Restore RHR Flow:
- b. Check RHR flow -
LESS THAN 1500 GPM PER PUMP
- c. Adjust RHR Hx bypass flow control valve, HCV-626. to desired flowrate a.
Go to Step 9e.
- b. Manually adjust RHR flow as necessary.
- d. Place RHR Hx bypass flow control
- valve, HCV-626. controller in AUTO e.
RHR flow -" RESTORED
~ HCV-624
~ HCV-625 e.
Perform the following:
- 1) Start trending core exit T/Cs.
- 2) IF RCS closed, THEN go to Step 10.
IF RCS vented to atmosphere, THEN go to Step 16.
0
EOP:
AP-RHR. 1 TITLE:
LOSS OF RHR REV:
15 PAGE 10 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Monitor RCS Temperature:
a.
RCS temperature STABLE OR DECREASING b.
Go to Step 19
- a. IF RCS closed, THEN go to Step 11.
IF RCS open to atmosphere, THEN go to Step 16.
11 Check Any S/G Level GREATER THAN 17%
Verify at least 200 gpm AFW flow available.
IF NOT, THEN go to Step 17.
12 Check RCS Pressure GREATER THAN 300 PSIG Increase RCS pressure to greater than 300 psig.
IF RCS pressure can NOT be increased, THEN go to Step 17.
13 Check RCP Status ANY RCP RUNNING Perform the followig:
I
- a. Establish conditions for starting an RCP.
o Verify bus llA or 11B energized.
o Refer to Attachment RCP START.
- b. Start one RCP.
IF an RCP can NOT be started, THEN verify natural circulation.
(Refer to Attachment NC.)
IF natural circulation NOT
- verified, THEN increase dumping steam.
a e
EOP:
AP-RHR. 1 LOSS OF RHR REV:
15 PAGE 11 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 14 Establish Condenser Steam Dump Manual Control:
- a. Verify condenser available:
o Any MSIV -
OPEN o
Annunciator G-15, STEAM DUMP ARMED - LIT a.
Perform the following:
2)
Go to Step 15.
- b. Place condenser steam dump controller HC-484 in MANUAL
- c. Place steam dump mode selector switch to MANUAL d.
Open steam dump valves as necessary to stabilize RCS temperature 15 Monitor RCS Temperature:
a.
RCS temperature STABLE OR DECREASING
- a. IF dumping steam does NOT provide adequate
- cooling, THEN perform the following:
- 1) Initiate S/G blowdown from both S/Gs.
- 2) Maintain both S/G levels stable by controlling AFM flow.
3)
Go to Step 17.
b.
Go to Step 18
~
~
w
EOP:
AP-RHR.1 LOSS OF RHR REV:
15 PAGE 12 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 16 Check RCS Conditions a.
Rx vessel head REMOVED b.
Stop refueling operations if in progress
- c. Verify Refueling Cavity Level GREATER THAN 23 FEET ABOVE VESSEL FLANGE
- d. Verify refueling cavity sweep fans RUNNING a.
Go to Step 17.
- c. Increase refueling cavity level to greater than 23 feet (Refer to 0-15.3, FILLING REFUELING CANAL).
- d. Locally start refueling cavity sweep fans if available.
17 Check CCW System Operation:
o CCW pumps
- AT LEAST ONE RUNNING o
MOV-738A AND MOV-738B -
OPEN AS NECESSARY o
Annunciator A-21, COMP COOLING HX OUT HI TEMP - EXTINGUISHED o
Annunciator A-22.
- EXTINGUISHED o
Annunciator A-30.
CCW PUMP INLET HEADER HI TEMP - EXTINGUISHED To 'restore CCW cooling to RHR Hxs.
perform the following:
- a. Ensure the standby CCW pump is running.
b.
Open MOV-738A and MOV-738B as necessary.
IF CCW can NOT be restored, THEN continue attempts to restore CCW (Refer to AP-CCW.3, LOSS OF CCW-PLANT SHUTDOWN).
L
EOP:
AP-RHR.1 TITLE:
LOSS OF RHR REV:
15 PAGE 13 of 13 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Consult with Plant Staff to determine alternatives for long term cooling.
18 Monitor RHR Cooling:
o RHR cooling RESTORED o
RCS temperature STABLE OR DECREASING Perform the following:
- a. Evaluate alternatives for long term cooling (Consult Plant Staff)
~ Consider establishing secondary heat sink
~ Refer to ER-RHR.1, RCDT PUMP OPERATION FOR CORE COOLING
~ Consider RCS feed and bleed
- c. Return to Step 3.
NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION. for reporting requirements.
19 Notify Higher Supervision 20 Return to Procedure Or Guidance In Effect
-END-
EOP:
AP-RHR.1 LOSS OF RHR REV:
15 PAGE 1 of 1
AP-RHR.1 APPENDIX LIST TITLE 1)
FIGURE MIN SUBCOOLING (PIG-1.0) 2)
ATTACHMENT NORMAL RHR COOLING (ATT-14.0) 3)
ATTACHMENT RCP START (ATT-15. 0) 4)
ATTACHMENT NC (ATT-13.0) 5)
ATTACHMENT CNMT CLOSURE (ATT-3.1)
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV 9
PAGE 1 of 14 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSIBLE AGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 2 of 14 A.
PURPOSE This procedure provides guidance necessary for maintaining core cooling and protecting the reactor core in the event, that RHR cooling is lost during RCS reduced inventory operation, (i.e., at indicated Loop Levels of less than 64 inches with fuel in the vessel).
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The following symptoms are indicative of LOSS OF RHR AT RCS REDUCED INVENTORY CONDITIONS:
a.
No RHR pumps running, or b.
Annunciator A-20, RESIDUAL HEAT REMOVAL LOOP LO FLOW 2900 GPM (Set at 400 GPM per 0-2.2 in RHR Cooling mode) lit, or c.
Unexpected increase in RCS temperature while on RHR cooling at low loop levels, or d.
Erratic or no flow on FI-626
t'g 4
~
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV' PAGE 3 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 0 t t 1
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CAUTION o
CHANGES IN RCS PRESSURE COULD RESULT IN INACCURACIES IN RCS LOOP LEVEL INDICATIONS.
o SHOULD CORE BOILING OCCUR, "SURGE LINE FLOODING" MAY RESULT IN RCS PRESSURIZATION AND ERRONEOUS HIGH LOOP LEVEL INDICATION.
o DO NOT START ANOTHER RHR PUMP UNTIL THE CAUSE OF THE ABNORMAL RHR INDICATIONS HAS BEEN DETERMINED AND CORRECTED.
IF A RUNNING PUMP HAS TRIPPED FOR REASONS OTHER THAN LOW LOOP LEVEL OR LOSS OF SUCTION FLOW, THEN REDUNDANT PUMP MAY BE STARTED.
o IA TO CNMT MAY BE REQUIRED FOR RCS MAKEUP AND SHOULD NOT BE ISOLATED UNTIL DIRECTED BY THIS PROCEDURE.
NOTE:
Conditions should be evaluated for site contingency reporting (Refer to EPIP-1.0.
GINNA STATION EVENT EVALUATION AND CLASSIFICATION).
1 Initiate CNMT Closure (Refer to 0-2.3.1A, CONTAINMENT CLOSURE CAPABILITY IN TWO HOURS DURING RCS REDUCED INVENTORY OPERATION)
~
~
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 4 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2 Check If RHR Pumps Should Be Stopped:
a.
RHR pump ANY RUNNING b.
Check RCS level:
o Level GREATER THAN 6 INCHES a.
Go to Step 3.
- b. Stop RHR pumps and go to Step 3.
o Level STABLE c.
RHR flow -
LESS THAN 500 GPM d.
RHR pumps cavitating:
o RHR pump flow - OSCILLATING
-OR-c.
Reduce RHR flow as necessary.
d.
Go to Step 18.
- APPROXIMATELY ZERO (PPCS group GD NPSH) e.
Stop RHR pumps 3 Isolate Letdown And Known Drain Paths
- a. Verify the following valves CLOSED
- a. Manually close valves.
~
RCDT pump suctions from sump B, MOV-1813A and MOV-1813B
~ Loop B cold leg to REGEN Hx, AOV-427
~ Low pressure letdown pressure control valve.
PCV-135
~
RHR letdown flow control
- valve, HCV-133
~ Excess letdown isolation
- valve, AOV-310
- b. Evaluate normal drain lineups
I
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~
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 5 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Start Available CNMT RECIRC Fans NOTE:
Personnel remaining in CNMT to assist in event mitigation should consult Radiation Protection for changes in radiological concerns.
5 Initiate Actions To Protect Personnel In CNMT:
- a. Evacuate non-essential personnel from CNMT
- b. Periodically monitor CNMT radiation
~
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1 1 i *
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1 4
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0 CAUTION o
PERSONNEL WORKING IN CNMT SHOULD BE WARNED BEFORE REFILLING THE RCS TO AVOID INADVERTANT CONTAMINATION OF PERSONNEL WORKING NEAR RCS OPENINGS.
o THE S/G OFFICE SHOULD BE NOTIFIED BEFORE RAISING LOOP LEVEL.
o ONLY BORATED WATER SHOULD BE ADDED TO THE RCS TO MAINTAINADEQUATE SDM.
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- 6 Check RCS Temp o
Core Exit TC's LESS THAN 200'F o
No visual steam at RCS vents Go to Step 11.
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 6 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7 Check RCS Loop Level LESS THAN 30 INCHES Go to Step 12.
NOTE:
The next four steps are sequenced to indicate the preferred order of RCS refill methods if core boiling is not occurring.
8 Refill The RCS By Gravity Feed From The RWST
- b. Close RHR pump discharge valve to loop B cold leg, MOV-720
- c. Verify MOV-856 indicates midposition
- c. Perform the following:
1)
Open MOV-720.
2)
Go to Step 9.
- d. Perform the following:
- 1) Close MOV-856.
2)
Open MOV-720.
e.
Check RCS loop level GREATER THAN 30 INCHES e.
- 3) IF RCS loop level greater than 6 inches, THEN go to Step 9.
IF NOT, THEN go to Step 11.
Continue filling RCS.
WHEN RCS loop level greater than 30
- inches, THEN do Steps 8f through h.
- f. Manually close MOV-856 g.
Open RHR pump discharge valve to B loop cold leg, MOV-720
- f. Direct AO to locally close valve.
- g. IF MOV-720 does NOT open, THEN open core deluge valves MOV-852A and MOV-852B.
h.
Go to Step 12
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 7 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9 Refill The RCS By Charging To B Loop Cold Leg:
Open and verify open charging line valve to loop B cold leg, AOV-294
- c. Verify HCV-142 demand at 0%
- d. Start operable charging pump and increase flow to maximum
- e. Verify charging flow -
GREATER THAN ZERO
Check RCS loop level GREATER THAN 30 INCHES
- h. Stop running charging pump
- i. Close or verify closed charging line valve to loop B cold leg.
AOV-294 and AOV-392B j.
Go to Step 12
- a. Manually open valve.
b.
Open alternate charging line to loop A cold leg, AOV-392B, and go to Step 9d.
e.
Perform the following:
- 1) Stop operating charging pump.
- 2) Close AOV-294.
3)
Go to Step 10.
- f. Perform the following:
1)
Open or verify open alternate charging line to loop A cold
- leg, AOV-392B.
- 2) Close AOV-294.
- 3) Verify loop level increasing as expected.
IF NOT, THEN perform the following:
a)
Stop operating charging pump.
b) Close AOV-392B.
c) Close IA to CNMT, AOV-5392.
d)
Go to Step 10.
- g. Continue filling RCS.
WHEN loop level greater than 30 inches, THEN do Steps 9h through j.
4 C
EOP:
AP-.RHR. 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 8 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 10 Refill RCS Using SI Pumps To Cold Legs:
a.
Open the appropriate SI pump discharge valves to loop cold legs
~
A SI Pump
- MOV-878B
~
B SI Pump
- MOV-878D
~
C SI Pump
- MOV-878B AND/OR MOV-878D b.
Open SI pump suction valves from RWST
~ MOV-825A
~ MOV-825B a.
Ensure at least one valve open.
IF valves can NOT be opened, THEN dispatch AO to check breakers.
~ MOV-878B, MCC D position 8C
~ MOV-878D, MCC D position 8F
- b. Ensure at least one valve open.
IF valves can NOT be opened, THEN dispatch AO to check breakers.
,d. Verify the following:
o SI flow -
GREATER THAN ZERO o
RCS loop level INCREASING AS EXPECTED
~ MOV-825A.
MCC C position 9J
~ MOV-825B, MCC D position 9J
- d. Perform the following:
- 1) Stop operating SI pump.
- 2) Close loop cold leg inlet valves.
~ MOV-878B
~ MOV-878D e.
Check RCS loop level GREATER THAN 30 INCHES
- f. Stop running SI pump
- g. Close SI discharge valves to loop cold legs, MOV-878B, and MOV-878D 3)
Go to step 11.
- e. Continue filling RCS.
WHEN loop level greater than 30 inches, THEN do steps 10f through h.
h.
Go to Step 12
k
EOP:
AP-RHR. 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS'EV:
9 PAGE 9 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
SI Pump makeup should not be secured when core boiling is indicated.
11 Refill RCS Using SI Pumps To Hot Legs:
a.
Open the appropriate SI pump discharge valves to loop hot legs
~
A SI Pump
- MOV-878A
~
B SI Pump
- MOV-878C
~
C SI Pump
- MOV-878A AND/OR MOV-878C b.
Open SI pump suction valves from RWST MOV-825A
~ MOV-825B
- d. Verify the following:
o SI flow -
GREATER THAN ZERO o
RCS loop level INCREASING AS EXPECTED a.
Ensure at least one valve open.
IF valves can NOT be opened, THEN dispatch AO to check breakers.
~ MOV-878A, MCC C position 8C
~ MOV-878C, MCC C position 8F
- b. Ensure at least one valve open.
IF valves can NOT be opened.
THEN dispatch AO to check breakers.
~ MOV-825A, MCC C position 9J
~ MOV-825B.
MCC D position 9J
- d. Perform the following:
- 1) Stop operating SI pump.
'2) Close loop hot leg inlet valves.
~ MOV-878A
~ MOV-878C
- 3) Ensure makeup flow is initiated
~ Gravity feed from RWST
~ Charging pumps
~ SI pumps to cold legs
~
VCT overpressure
~
RWST purification pump
- e. Operate SI Pump as necessary to maintain the following parameters:
o Core Exit TC's
- LESS THAN 200' o
No visual steam at RCS vents o
RCS loop level GREATER THAN 30 INCHES
- e. IF core exit TC's continue to
- increase, THEN return to Step 9
to establish additional. charging or SI flow to the RCS cold legs.
~
~
1
EOP:
AP-RHR.2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 10 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Identify And Isolate Any RCS Leakage NOTE: If adequate time to completely vent the RHR system is not available, then air can be swept out of the RHR lines by running an RHR pump at a flowrate between 1200 gpm and 1400 gpm.
13 Vent RHR System As Necessary
- f 1
~
~
1 I
~ l 1
~
4 4
1 t
~
1
~
1
~
~
~
1 t
~
0 4
4
~ l
~
1 1
CAUTION THE RHR PUMP FLOW CONTROL VALVES WILL FAIL OPEN ON LOSS OF INSTRUMENT AIR PRESSURE.
14 Check IA system:
o Verify adequate air compressors RUNNING o
Verify IA pressure GREATER THAN 60 PSIG Reset and start additional IA compressors as necessary (75 kw each).
IF IA pressure can NOT be restored, THEN perform the following:
- a. Dispatch AO with locked valve key to locally throttle RHR Hx outlet valves to approximately half open.
~
A RHR Hx, HCV-625 handwheel
~
B RHR Hx, HCV-624 handwheel b.
WHEN conditions permit, THEN refer to AP-IA.1, LOSS OF INSTRUMEN'Z AIR. to restore IA.
~
~
AE 't
~
fOP:
AP-RHR.2 TITLf:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE ll of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Establish Conditions To Start RHR Pump:
a.
Check RHR cooling valve alignment NORMAL (Refer to Attachment NORMAL RHR COOLING)
- a. Manually or locally align valves as necessary.
- c. Verify the following RCS conditions:
o Core exit TC's
- LESS THAN 200' o
No visual steam at RCS vents o
RCS loop level
- GREATER THAN 30 INCHES d.
RHR pump
- AVAILABLE
- b. Restore CCW cooling.=
- c. Perform the following:
- 1) Start trending core exit TCs.
- 2) Return to Step 5.
- d. Perform the following:
- 1) Start trending core exit TCs.
- 2) Place RCDT pumps in service (Refer to ER-RHR.l.
RCDT OPERATION FOR CORE COOLING).
- 3) Return to Step 5.
EOP:
AP-RHR. 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 12 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED I
4
~
1
~
~
~ l i 0 l 4
~
~
4 1
~
1 P
~
1 0 I 1 I
~
0 4 I 1 i 0
1 1
1
~
CAUTION STARTING AN RHR PUMP MAY RESULT IN AN RCS LEVEL DECREASE DUE TO SHRINK OR VOID COLLAPSE.
16 Restore RHR Flow:
a.
Close RHR pump flow control valves
~ HCV-624
~ HCV-625
- b. Place RHR Hx bypass. valve, HCV-626. to MANUAL and close valve
- c. Start one RHR pump
- d. Ensure RHR flow -
LESS THAN 1500 GPM e.
Check RCS loop level GREATER THAN 30 INCHES
- f. Gradually increase RHR bypass flow to desired flowrate g.
RHR flow -
RESTORED
- h. Establish desired RCS cooldown rate
- a. IF IA NOT available, THEN ensure AO has locally throttled RHR Hx outlet valves and go to step 16c.
- d. IF IA NOT available, THEN dispatch AO with locked valve key to locally adjust flow using RHR Hx outlet valves.
~
A RHR Hx, HCV-625 handwheel
~
B RHR Hx, HCV-624 handwheel
- e. Establish adequate makeup flow to stabilize RCS loop level at greater than 30 inches.
- g. Perform the following:
- 1) Start trending core exit T/Cs.
- 3) Return to Step 5.
EOP:
AP-RHR. 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 13 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Consult with Plant Staff to determine alternatives for long term cooling.
17 Establish Stable Plant Conditions:
- a. Verify Core Exit TC's
- LESS THAN 200'F b.
Check RCS loop level:
o Level -
GREATER THAN 30 INCHES o
Level STABLE
- c. Stop any running SI pump
- d. Stop any running charging pump
- a. Continue cooling with RHR.
Return to Step 16d.
- b. IF RCS loop level increasing.
THEN reduce makeup rate to stabilize level.
IF RCS loop level decreasing, THEN return to Step 8.
- e. Initiate makeup to the RCS using either of the following:
o One charging pump at maximum flow
-OR-o One SI pump 18 Check CCW System Operation:
o CCW pumps
- AT LEAST ONE RUNNING o
MOV-738A AND MOV-738B -
OPEN AS NECESSARY o
Annunciator A-21, COMP COOLING HX OUT HI TEMP - EXTINGUISHED o
Annunciator A-22, CCW PUMP DISCHARGE LO PRESS
- EXTINGUISHED o
Annunciator A-30.
- EXTINGUISHED To restore CCW cooling to RHR Hxs.
perform the following:
a.
Ensure the standby CCW pump is running.
b.
Open MOV-738A and MOV-738B as necessary.
IF CCW can NOT be restored, THEN continue attempts to restore CCW (Refer to AP-CCW.3.
LOSS OF CCW-PLANT SHUTDOWN).
~
~
a 1
~
EOP:
AP-RHR. 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 14 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 19 Check Core Exit TC's:
o Temperature
- LESS THAN 140'F o
Temperature STABLE OR DECREASING Continue cooling with RHR.
Return to Step 16d.
20.Initiate Monitoring of RCS Temperature NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION. for reporting requirements.
21 Notify Higher Supervision 22 Return To Procedure Or Guidance In Effect
-END-
EOP:
AP-RHR ~ 2 TITLE:
LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS REV:
9 PAGE 1 of 1 AP-RHR.2 APPENDIX LIST TITLE 1)
ATTACHMENT NORMAL RHR COOLING (ATT-14.0)
EOP:
ATT-15.0 ATTACHMENT RCP START REV:
6 PAGE 1 of 3 Responsible Manager Date jo l3 <OOQ CAUTION: IF seal outlet temperature is greater than 235',
THEN CCW thermal barrier cooling and seal injection should NOT be established to the affected RCP(s).
Both of these methods of seal cooling could have unintended consequences that result in additional pump damage or failure of the CCW system.
Seal cooling should instead be restored by cooling the
- RCS, which will reduce the temperature of the water flowing through the pump seals.
A)
The following are prerequisites for starting an RCP:
o RCP oil lift pump running (-2 minutes)
(MCC E) o RCP oil liftpressure white light LIT B)
In addition, the following conditions should be met prior to starting an RCP:
o Both PRZR spray valves closed DEMAND AT 0%
o CCW in service to selected RCP(s) with flow and temperature alarms (A-7, A-15) extinguished.
o Selected RCP(s) seal inlet temperature LESS THAN 135' o
Selected RCP(s) motor bearing temperatures LESS THAN 200'F (PPCS address is GD RCPS or use recorder, if selected) o Selected RCP(s) seal injection in service o
Seal injection flow GREATER THAN 6 GPM o
Labyrinth seal D/P GREATER THAN 15 INCHES OF WATER o
Selected RCP(s)
¹1 seal D/P GREATER THAN 220 PSID o
Selected RCP(s) oil levels:
o Level alarms (A-24, A-32)
EXTINGUISHED o
Level indicators ON SCALE o
Selected RCP(s) seal return alignment:
a)
RCP ¹1 seal outlet valve(s) open:
o AOV-270A for RCP A o
AOV-270B for RCP B
b)
IF MOV-313, seal return isolation,
- open, THEN verify the following:
o VCT pressure GREATER THAN 15 PSIG o
Selected RCP(s)
¹1 seal leakoff flow WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF o
Selected RCP(s) standpipe low level alarm (B-ll, B-12)
EXTINGUISHED
EOP:
ATT-15.0 ATTACHMENT RCP START REV:
6 PAGE 2 of 3 c)
IF MOV-313 closed, THEN verify other RCP ¹1 seal parameters normal for selected RCP(s):
o RCP ¹1 seal inlet temperature LESS THAN 135' o
RCP ¹1 seal D/P GREATER THAN 220 PSID NOTE:
RCP oil lift pump should be stopped after RCP is running.
EOP:
ATT-15.0 ATTACHMENT RCP START REV 6
PAGE 3 of 3 FIGURE RCP SEAL LEAKOFF
¹1 SEAL LEAK RATE (GPM) 6 LEAK RATE INCREMENTS 0.2 GPM NORMAL OPERATING RANGE DP INCREMENTS 50 PS I 250 500 750 1000 1250 1500 1750 2000 2250 2500
¹1 SEAL DP (RCS PRESS VCT PRESS)
4 c
t V
~
J",W W