ML17250B294
| ML17250B294 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 06/03/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17250B293 | List: |
| References | |
| AP-CCW.1, NUDOCS 9307080212 | |
| Download: ML17250B294 (30) | |
Text
EOP:
AP-CCW.l LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 1 of 14
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ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW ATE tu 3 PLANT SUPERIN NDENT EFFECTIVE DATE ICATEGORY 1.0 REVIEWED BY:
9307080212 9'30628 PDR ADOGK 05000244 P
lp I
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AP-CCW.1 TITLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV' PAGE 2 of 14 A.
PURPOSE This procedure provides the actions required to identify and isolate leakage into the CCW system and to control the plant during the course of the event.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY'ONDITIONS This procedure is entered from; a.
AP-CVCS.1, CVCS LEAK, or, b.
AP-RCS.1, RCS LEAK, or, c.
AP-RCP.1 RCP SEAL MALFUNCTION, when CCW surge tank. level increasing.
2.
SYMPTOMS The symptoms of LEAKAGE INTO THE COMPONENT COOLING LOOP are; a ~
b.
Annunciator A-5, CCW SURGE TANK HI LEVEL 58.84, lit or CCW radiation monitor (R-17) alarm, or c.
Annunciator A-7 (15),
RCP A (B)
CCW RETURN HI TEMP OR LO FLOW 165 GPM 125'F, lit or d.
Erratic RCP labyrinth seal D/P.
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T1TLE:
AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 3 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, THEN E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o IF CCW SYSTEM RADIATION MONITOR ALARMS, THEN VERIFY CCW SURGE TANK VENT, RCV-017, CLOSES.
1 Check CCW Indications a.
Check CCW surge tank level INCREASING
- a. IF level decreasing, THEN go to AP-CCW.2, LOSS OF CCW DURING POWER OPERATION or AP-CCW.3, LOSS OF CCW -
PLANT SHUTDOWN as necessary.
IF level stable, THEN return to procedure or step in effect.
c.
CCW radiation monitor, R-17, INCREASING c.
Check RCS leakrate.
IF RCS leakrate increasing, THEN go to Step 2 (Refer to RCS Leakage Surveillance Sheet)
IF RCS leakage and R-17 indication normal, THEN go to Step 13.
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AP-CCW.1 TITLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 4 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF EITHER RCP ¹1 SEAL OUTLET TEMPERATURE EXCEEDS 215'F, THEN THE AFFECTED RCP(S)
SHOULD BE STOPPED.
NOTE:
RCPs may be safely operated without CCW to the thermal barrier if seal injection flow is maintained.
2 Check RCP Thermal Barrier Indications:
o Labyrinth seal D/Ps GREATER THAN 15 INCHES OF WATER AND APPROXIMATELY EQUAL o
RCP ¹1 seal leak off flows BETWEEN 0.25 GPM AND 5.5 GPM o
Annunciator A-7 (15),
RCP A (B)
CCW RETURN HI TEMP OR LO FLOW 165 GPM 125 F -
EXTINGUISHED IF either pump has indication of a thermal barrier leak, THEN perform the following:
- a. Verify seal injection flow to affected RCP.
~ RCP A, AOV-754A
~ RCP B, AOV-754B
- c. Evaluate CCW surge tank level trend.
IF leakage into the CCW system has
- stopped, THEN go to Step 17.
3 Check RCS temperature GREATER THAN 350'F Go to Step 7.
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AP-CCW.1 TITLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 5 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION CLOSELY MONITOR PRZR LEVEL WHILE LETDOWN IS ISOLATED.
4 Check NRHX For Leakage:
a.
Normal letdown - IN SERVICE
- a. IF excess letdown in service, THEN perform the following:
- 1) Close excess letdown flow control valve, HCV-123.
- 2) Close EXCESS LTDN LOOP A COLD TO Hx, AOV-310.
b.
Check Letdown Indications:
3)
Go to Step 5
~
- b. Isolate Normal Letdown:
o Letdown line flow-APPROXIMATELY 40 GPM
- 1) Close loop B cold leg to REGEN Hx, AOV-427.
o Low press LTDN pressure-APPROXIMATELY 250 PSIG o
Letdown pressure control
- valve, PCV-135, demand-APPROXIMATELY 35%
OPEN
- 2) Close letdown orifice valves (AOV-200A, AOV-200B, and AOV-202).
- 3) Place letdown pressure controller, PCV-135, in MANUAL and close valve (demand at 100%).
- 4) Control charging pump speed as necessary to maintain RCP labyrinth seal D/P less than 80 inches.
- 5) Close charging flow control
- valve, HCV-142.
6)
Go to Step 5.
c.
Go to Step 6
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV' PAGE 6 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5
Check If CCN Inleakage Has Stopped:
a.
CCW surge tank level -
STABLE
- a. IF CCW surge tank level still increasing, THEN perform the following:
- 1) Restore letdown flowpath previously isolated (Refer to Attachment LETDOWN).
- 2) Adjust charging as necessary to restore PRZR level.
- b. Restore an intact letdown flowpath if available (Refer to Attachment LETDOWN) 3)
Go to Step 13.
c.
Check any letdown flowpath-RESTORED
- c. IF no letdown flowpath available, THEN consult Plant Staff.
" d. Adjust charging as necessary to restore PRZR level
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 7 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Establish Stable Plant Conditions:
a.
Check Tavg - TRENDING TO TREF b.
Check PRZR pressure
- TRENDING TO 2235 PSIG
- a. Insert/withdraw control rods or, if necessary, adjust turbine load to match Tavg to Tref.
- b. Verify proper operation of PRZR heaters and spray or take manual control of PRZR pressure controller 431K.
c.
Check PRZR level
- TRENDING TO PROGRAN
- c. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
d.
Go to Step 17
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AP-CCW.1 T1TLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 8 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
CLOSELY MONITOR PRZR LEVEL AND RCS PRESSURE WHILE LETDOWN IS ISOLATED.
o UNFILTERED WATER MAY DAMAGE RCP SEAL SURFACES.
- * * * * * * * * * * * * * * * * *. g * * * * * * * * * * * * * * * * * * * *
- 7 Check NRHX For Leakage:
- a. Narrow range PRZR level ON SCALE
- b. Isolate letdown flow to NRHX:
- a. IF the RCS is solid, THEN perform the following:
- 1) Stop any running RCP.
2)
WHEN RCPs stopped, THEN stop any running charging 'pump.
o Ensure the following valves CLOSED
~ Loop B cold leg to REGEN Hx, AOV-427
~ Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202)
~ RHR letdown flow control
- valve, HCV-133 o
Close letdown isolation
- valve, AOV-371 o
Place letdown pressure controller, PCV-135, in MANUAL and close valve (demand at 100%).
EOP g AP-CCW.1 TITLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 9 of,14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF THE RCS IS WATER SOLID, THEN ANY INCREASE IN RCS TEMPERATURE MAY RESULT IN A SIGNIFICANT RCS PRESSURE INCREASE.
RCS HEATUP SHOULD BE PREVENTED.
8 Check If CCW Inleakage'Has Stopped:
a.
CCW surge tank level STABLE
- a. IF CCW inleakage continues, THEN go to Step 9.
- b. Narrow range PRZR level ON SCALE
- b. IF RCS is solid, THEN perform the following:
- 1) Ensure both RCPs off.'.
- c. Establish excess letdown (Refer to Attachment LETDOWN)
- 2) Cycle charging pumps as necessary to control RCS pressure.
- d. Start one charging pump
- e. Adjust charging flow as necessary to restore PRZR level
- f. Check RCS temperature STABLE g.
Go to Step 17
- f. Ad]ust RHR cooling as necessary.
s s
I' Ihl
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 10 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9
Restore Letdown:
a.
Check RHR - IN SERVICE b.
Open letdown isolation valve, AOV-371 a.
Perform the following:
- 1) Establish normal letdown (Refer to Attachment LETDOWN).
2)
Go to Step 10.
- c. Place letdown -controllers in MANUAL at 35% open
~ TCV-130
~ PCV-135
- d. Manually open RHR LETDOWN TO
- CVCS, HCV-133 e.
Place TOP-130 1a AUTO at 105'F
- f. Place PCV-135 in AUTO at desired pressure
- g. Start one charging pump
- h. Adjust charging flow as necessary to restore PRZR pressure/level
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AP-CCW.1 TITLE:
LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 11 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED
- -,4 * * * * * * * * * * * * * * * * * * * * *'
CAUTION o
ONE TRAIN OF RHR SHALL BE OPERABLE AT ALL TIMES.
'C o
IF AN RHR PUMP OR HX IS REMOVED FROM SERVICE, THEN OPERABILITY REQUIREMENTS SHOULD BE EVALUATED (REFER TO TECH SPEC SECTIONS 3.1.1.1 AND 3.3.1).
10 Check RHR System For Leakage:
- a. Both RHR loops
- ALIGNED AND OPERABLE
- a. IF any loop isolated for this leak investigation, THEN perform the following:
- 1) Restore isolated loop to service (Refer to Attachment RHR ISOL and S-13A, RHR LINEUP FOR SAFETY INJECTION)
~
2)
WHEN loop restored, THEN isolate other RHR loop (Refer to Attachment RHR ISOL).
Go to Step 11.
ll Verify RCS temperature STABLE OR DECEASING Increase cooling from available RHR loop.
Attempt to establish S/G cooling if necessary.
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 12 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Check If CCW Inleakage Has Stopped:
a.
CCW surge tank level STABLE b.
Go to Step 17
- a. IF any RHR loop has NOT been checked for leakage, THEN return to Step 10.
IF both RHR loops have been
13 Check RMW to CCW Surge Tank:
o Verify CCW surge tank fill
- valve, MOV-823 -
CLOSED o
Verify RMW pump(s)
- OFF IF RMW te CCW surge
- tank, MOV-823, open OR RMW pump running, THEN perform the following:
a.
Close CCW surge tank fillvalve, MOV-823.
- b. Shut off running RMW pumps.
- c. IF CCW inleakage
- stops, THEN go to Step 17.
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AP-CCW.1 TITLE!
LEAKAGE INTO THE COMPONENT COOLING LOOP REV 8
PAGE 13 of 14 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 14 Check For Sample Hx Leaks:
- a. Direct AO to locally check nuclear sample room Hxs o
Sample Hx (TI-602) common CCW return temperature from sample Hxs NORMAL (Refer to Aux Bldg log sheet, 3 of 3) o Sample Hx (FI-603) common CCW return flow from sample Hxs NORMAL (Refer to Aux Bldg log
- sheet, 3 of 3) a.
Determine which sample Hx CCW outlet temperature is high, THEN perform the following:
- 1) Isolate the affected Hx.
- 2) IF CCW inleakage has
- stopped, THEN go to Step 17.
Go to Step 15.
- d. Verify CCW inleakage STOPPED 15 Check SW Header Pressure-LESS THAN 60 PSIG Dispatch AO to check CCW pump discharge pressure.
IF SW pressure greater than CCW pressure, THEN investigate possible SW leak into CCW system.
CAUTION IF A SAFEGUARDS PUMP IS TO BE REMOVED FROM SERVICE DURING AN EMERGENCY CONDITION, THEN CONSULT WITH PLANT STAFF PRIOR TO STOPPING PUMP.
16 Check Safeguards Pump Status
- ALL SAFEGUARDS PUMPS OFF
~ SI pumps
~ RHR pumps
~ CS pumps IF any event in progress requiring safeguards pump operation, THEN consult Plant Staff for guidance on checking safeguards pumps for CCW leakage.
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AP-CCW. 1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV 8
PAGE 14 of 14
- STEP, ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 17 Evaluate Plant Conditions:
a.
CCW inleakage
- IDENTIFIED AND ISOLATED
- a. Return to Step 2.
- b. Determine if operation can continue (Consult Plant staff if necessary)
- OPERATION CAN CONTINUE
- b. IF plant shutdown is required, THEN refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN.
18 Check CCW Surge Tank Level APPROXIMATELY 504 Consult HP tech to determine method to drain and dispose of excess CCW.
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-
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AP-CCW. 1 LEAKAGE INTO THE COMPONENT COOLING LOOP REV:
8 PAGE 1 of 1
AP-CCW.1 APPENDIX LIST TITLE PAGES 1)
ATTACHMENT RHR ISOL 2)
ATTACHMENT LETDOWN