ML20155G030
| ML20155G030 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 10/30/1998 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17265A449 | List: |
| References | |
| AP-CCW.1, NUDOCS 9811060188 | |
| Download: ML20155G030 (15) | |
Text
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TITLE:
9, REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 1 of 14
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ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSIBIg MANAGER U_
10-3042 EFFECTIVE DATE d
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CATEGORY 1.0 i
REVIEWED BY:
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- BA' 28a!" O a8884 F
PDR_
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TITLE:
REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP d
PAGE 2 of 14
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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 CONDITIONS - 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.
Annunciator A-5, CCW SURGE TANK HI LEVEL 58.8%,
lit or b.
CCW radiation monitor (R-17) alarm, or c.
Annunciator A-7 (15), RCP A (B) CCW RETURN HI TEMP
/~N-OR LO FLOW 165 GPM 125'F,-lit or b
d.
Erratic RCP labyrinth seal D/P.
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP l
PAGE 3 of 14 i OV l
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP l'
CAUTIQH o IF. AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS. THEN E 0. REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o IF CCW SYSTEM RADIATION MONITOR ALARMS, THEN VERIFY CCW SURGE TANK VENT.
l RCV 017, CLOSES.
l l
1 Check CCW Indications
- a. Check CCW surge tank level -
- a. H level decreasing, IliEN go to INCREASING AP-CCW.2. LOSS OF CCW DURING l
POWER OPERATION or AP-CCW.3.
LOSS OF CCW - PLANT SHUTDOWN as l
necessary. H level stable, l
THEN return to procedure or step in effect.
,1O l
v
- b. Direct RP tech to perform l
CH-PRI-CCW-LEAK, DETERMINATION OF CCW SYSTEM LEAKAGE i
l
- c. CCW radiation monitor, R-17
INCREASING 1eakrate increasing. THEN go to Step 2 (Refer to RCS Leakage l
Surveillance Sheet).
H RCS leakage and R 17 indication normal, THEN go to Step 13.
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 4 of 14 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP CAUTION IF EITHER RCP #1 SEAL OUTLET TEMPERATURE EXCEEDS 215'F, THEN THE AFFECTED RCP(S) SHOULD BE STOPPED.
N_QIE: RCPs may be safely operated without CCW to the thermal barrier if seal injection flow is maintained.
2 Check RCP Thermal Barrier H either pump has indication of a Indications:
thermal barrier leak. IHEN perform the following:
o Labyrinth seal D/Ps - GREATER THAN 15 INCHES OF WATER AND
- a. Verify seal injection flow to APPROXIMATELY EQUAL affected RCP.
o RCP #1 seal leak off flows -
[,')
RANGE OF FIGURE RCP SEAL LEAK 0FF seal D/P should increase).
%J o Annunciator A-7 (15). RCP A (B)
CCW RETURN HI TEMP OR L0 FLOW e RCP B, A0V-754B 165 GPM 125'F - EXTINGUISHED
- c. Evaluate CCW surge tank level trend. H leakage into the CCW system has stopped. IHEN go to Step 17.
3 Check RCS temperature -
Go to Step 7.
GREATER THAN 350 F
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 5 of 14 bO ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP CAUTION CLOSELY MONITOR PRZR LEVEL AND RCS PRESSURE WHILE LETDOWN IS ISOLATED.
.................c.
4 Check NRHX For Leakage:
- a. Normal letdown - IN SERVICE
- a. IE excess letdown in service.
.THEN perform the following:
- 1) Close excess letdown flow control valve. HCV-123.
- 3) Go to Step 5.
- b. Check Letdown Indications:
- b. Isolate Normal Letdown:
o Letdown line flow -
- 1) Close loop B cold leg to APPROXIMATELY 40 GPM REGEN Hx. A0V-427.
o Low press LTDN pressure -
o Letdown pressure control valve, PCV-135, demand -
- 3) Place letdown pressure APPROXIMATELY 35% OPEN 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 O
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 6 of 14 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP L_
5 Check If CCW Inleakage Has Stopped:
- a. CCW surge tank level STABLE
- a. H CCW surge tank level still increasing. IHEN perform the following:
- 1) Restore letdown flowpath previously isolated (Refer to Attachment LETDOWN)
-2) Adjust charging as necessary to restore PRZR level.
- 3) Go to Step 13.
- b. Restore an intact letdown flowpath if available (Refer to Attachment LETDOWN)
O.
- c. Check any letdown flowpath -
- c. H no letdown flowpath V-RESTORED available. I}JEH consult Plant Staff.
- d. Adjust charging as necessary to restore PRZR level
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 7 of 14 O
O ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 6 Establish Stable Plant Conditions:
- a. Check Tavg - TRENDING TO TREF
- a. Insert / withdraw control rods or.
if necessary, adjust turbine load to match Tavg to Tref.
- b. Check PRZR pressure - TRENDING
- b. Verify proper operation of PRZR TO 2235 PSIG heaters and spray or take manual control of PRZR pressure controller 431K.
- c. Check PRZR level - TRENDING T0
- c. Verify proper operation of PROGRAM charging pump speed controllers or take manual control of speed controllers to control PRZR level.
- d. Go to Step 17 O
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 8 of 14 l
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP I
CAUTION o CLOSELY MONITOR PRZR LEVEL AND RCS PRESSURE WHILE LETD0'J:4 IS ISOLATED.
o UNFILTERED WATER MAY DAMAGE RCP SEAL SURFACES.
7 Check NRHX For Leakage:
- a. Narrow range PRZR level - ON
- 1) Stop any running RCP.
- 2) M RCPs stopped. M stop any running charging pump.
- b. Isolate letdown flow to NRIIX:
o Ensure the following valves -
CLOSED Loop B cold leg to REGEN e
Hx, A0V-427
. Letdown orifice valves (A0V-200A, A0V-200B, and A0V-202)
. RHR letdown flow control valve. HCV-133 o Close letdown isolation valve. A0V-371 o Place letdown pressure l
controller, PCV-135. in MANUAL snd close valve (demand at 100%).
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 9 of 14 i
O LJ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP
]
CAUTION i
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. H CCW inleakage continues.
IHEH so to Step 9.
- b. Narrow range PRZR level - ON
- b. H RCS is solid. THEN perform SCALE the following:
- 1) Ensure both RCPs off.
- 2) Cycle charging pumps as
,.s.
necessary to control RCS pressure.
- c. Establish excess letdown (Refer to Attachment LETDOWN)
- d. Start one charging pump
- e. Adjust charging flow as necessary to restore PRZR level i
- f. Check RCS temperature - STABLE
- f. Adjust RHR cooling as necessary.
- g. Go to Step 17 I
d
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 10 of 14 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 9 Restore Letdown:
- a. Check RHR - IN SERVICE
- a. Perform the following:
- 1) Establish normal letdown (Refer to Attachment LETDOWN).
i l
- 2) Go to Step 10.
- b. Open letdown isolation valve.
- c. Place letdown controllers in MANUAL at 40% open
. TCV-130 e PCV-135
- e. Place TCV-130 in AUTO at 105*F
- f. Place PCV-135 in AUTO at desired j
. pressure
- g. Start one charging pump
- h. Adjust charging flow as necessary to restore PRZR pressure / level
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REV: 13
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AP-CCW.1 LEAI: AGE INTO THE COMPONENT COOLING LOOP l
PAGE 11 of 14 A
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l CAUTION i
o ONE TRAIN OF RHR SHALL BE OPERABLE AT ALL TIMES.
o IF AN RHR PUMP OR HX IS REMOVED FROM SERVICE. THEN OPERABILITY l
REQUIREMENTS SHOULD BE EVALUATED (REFER TO ITS SECTIONS 3.4 AND 3.5).
10 Check RHR System For Leakage:
- a. Both'RHR loops - ALIGNED AND
- a. J.E any loop isolated for this OPERABLE leak investigation. THEN perform l
the following:
- 1) Restore isolated loop to service (Refer to Attachment RHR ISOL and S 13A. RHR LINEUP FOR SAFETY INJECTION).
(
- 3) Go to Step 11.
l
E 11 Verify RCS temperature -
Increase cooling from available RHR l
STABLE OR DECREASING loop.
Attempt to establish S/G cooling if necessary.
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PAGE 12 of 14 1
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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP l
12 Check If CCW Inleakage Has Stopped:
- a. CCW surge tank level - STABLE
- a. E any RHR loop has NOT been checked for leakage. IHEH return to Step 10.
H both RHR loops have been checked. THEN restore RHR loops l
to operable and go to Step 13.
1
- b. Go to Step 17 l
13 Check RMW to CCW Surge Tank:
E RMW to CCW surge tank, MOV-823.
l open OR RMW pump running. IREN o Verify CCW surge tank fill perform the following:
valve. MOV-823 - CLOSED
- a. Close CCW surge tank fill valve, o Verify RMW pump (s) - 0FF MOV-S23.
b, Shut off running RMW pumps.
- c. H CCW inleakage stops, IEEN go to Step 17.
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 13 of 14 r
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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l
STEP l
14 Check For Sample Hx Leaks:
- a. Direct A0 to locally check
- a. Determine which sample Hx CCW nuclear sample room Hxs outlet temperature is high, THEN perfore the following:
o Sample Hx (TI-602) common CCW return temperature from
- 1) Isolate the affected Hx.
sample Hxs - NORMAL (Refer to j
Aux Bldg log sheet, 3 of 3)
- 2) H CCW inleakage has stopped.
THEN go to Step 17.
o Sample Hx (FI-603) common CCW l
return flow from sample Hxs -
l NORMAL (Refer to Aux Bldg log sheet. 3 of 3)
- b. Go to Step 15.
SAMPLING IN PROGRESS
sampling
/
- d. Verify CCW inleakage - STOPPED l
Dispatch A0 to check CCW pump LESS THAN 60 PSIG discharge pressure. H SW pressure greater than CCW pressure. THEN investigate possible SW 1eak into CCW system.
CAUTION l
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 E any event in progress requiring
- ALL SAFEGUARDS PUMPS OFF safeguards pump operation. THEN consult Plant Staff for guidance on
. SI pumps checking safeguards pumps for CCW RHR pumps leakage.
e CS pumps
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AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 14 of 14 0
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP i
17 Evaluate Plant Conditions:
- a. CCW inleakage - IDENTIFIED AND
- a. Return.to Step 2.
ISOLATED
- b. Determine if operation can
- b. IE plant shutdown is required.
continue (Consult Plant staff if THEN refer to 0-2.1. NORMAL necessary) - OPERATION CAN SHUTDOWN TO HOT SHUTDOWN.
l.
CONTINUE i
18 Check CCW Surge Tank Level -
Consult RP tech to determine method APPROXIMATELY.50%
to drain and dispose of excess CCW.
NOTE: Refer to 0-9.3 NRC IMMEDIATE NOTIFICATION for reporting l
requirements.
19 Notify Higher Supervision r
20 Return To Procedure Or Guidance In Effect
-END-l f
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REV: 13 AP-CCW.1 LEAKAGE INTO THE COMPONENT COOLING LOOP PAGE 1 of 1 i
k AP-CCW.1 APPENDIX LIST l
I TITLE 1)
FIGURE RCP SEAL LEAKOFF (FIG-4.0) 2)
ATTACHMENT RHR ISOL (ATT-14.2) 3)
ATTACHMENT LETDOWN (ATT-9.0) 4 O
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