ML17264A531
| ML17264A531 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/31/1996 |
| From: | Whits T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17264A532 | List: |
| References | |
| PROC-960531, NUDOCS 9606100008 | |
| Download: ML17264A531 (28) | |
Text
EOP:
AP-RCP. 1 RCP SEAL MALFUNCTION REV:
10 PAGE 1 of 10 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPON IBLE MANAGER EFFECTIVE DATE CATEGORY.1.0 REVIEWED BY:
9606i00008 96053i poa sooci oiooo2ss F
EOP:
AP-RCP.1 T1TLE RCP SEAL MALFUNCTION REV 10 PAGE 2 of 10 A.
PURPOSE - This procedure provides the instructions necessary to diagnose and to respond to a reactor coolant pump seal malfunction.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
E-3, STEAM GENERATOR TUBE RUPTURE, or b.
ES-1.2, POST LOCA COOLDOWN AND DEPRESSURIZATION, or ECA 0 ~ 1 g LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED, or e.
ECA-2.1, UNCONTROLLED DEPRESSURIZATION OF BOTH STEAM GENERATORS, or f.
ECA-3.1, SGTR WITH LOSS OF REACTOR COOLANT-SUBCOOLED RECOVERY DESIRED, or g
ECA 3
~ 2 g SGTR WITH LOSS OF REACTOR COOLANT SATURATED/
RECOVERY DESIRED, or h.
ECA-3.3, SGTR WITHOUT PRESSURIZER PRESSURE CONTROL, or i.
FR-I.1,
RESPONSE
TO HIGH PRESSURIZER LEVEL, when RCP seal malfunction is indicated.
2.
SYMPTOMS The symptoms of RCP SEAL MALFUNCTION are; a.
Annunciator B-17(18),
RCP A(B) No.1 SEAL HI-LO FLOW 5.0 GPM 1.0
, lit, or b.
Annunciator B-9(10),
RCP A(B) LABYR SEAL LO DIFF PRESS 15" H20, lit, or c.
Annunciator B-3(4),
RCP A(B)
STAND PIPE HI LEVEL +
1 FT, lit, or Continued on next page
EOP AP-RCP.1 TITLE:
RCP SEAL MALFUNCTION REV:
10 PAGE 3 of 10 2.
SYMPTOMS (cont) 6 ~
e.
go Annunciator B-ll(12), RCP A(B) STAND PIPE LO LEVEL -4 FT, lit, or Annunciator B-25(26),
RCP A(B) No.
1 SEAL LO DIFF PRESS 220 PSID, lit, or Annunciator B-l(2),
RCP A(B) No.
1 SEAL OUT HI TEMP 200'F, lit, or, Annunciator A-7(15),
RCP A(B)
CCW RETURN HIGH TEMP OR LOW FLOW, lit.
EOP:
AP-RCP.1 TlTLE:
RCP SEAL MALFUNCTION REV:
10 PAGE 4 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION e
o IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o IF ANY RCP IS TRIPPED, THEN SHUTDOWN MARGIN REQUIREMENTS SHOULD BE VERIFIED (REFER TO 0-3.1, BORON CONCENTRATION FOR XENON FREE ALL RODS IN MOST REACTIVE ROD STUCK OUT SHUTDOWN MARGIN).
o IF A RCP IS SECURED BECAUSE OF A SEAL MALFUNCTION, IT SHOULD NOT BE RESTARTED UNTIL THE CAUSE OF THE MALFUNCTION HAS BEEN DETERMINED AND CORRECTED.
NOTE:
o If a Reactor trip is initiated while performing Step 1, transition to E-0 should occur while completing subsequent actions of the step.
o Total ¹1 Seal Flow is defined as the sum of indicated ¹1 Seal Leakoff Flow and RCDT leak rate (PPCS Point ID L1003, 3.2 gal/%
in the normal operating range).
1 Check Total N1 Seal Leakoff Flows LESS THAN 8.0 GPM IF a ¹1 Seal Failure is verified by a decrease in Labyr Seal Diff Pressure OR increasing Seal Inlet/Outlet temps, THEN perform the following:
- a. IF reactor trip breakers closed THEN trip the reactor.
- b. Trip the affected RCP(s).
- c. Allow t mtuutes for pump coast
- down, THEN close affected RCP(s) seal disch valve.
~ RCP A; AOV-270A
~ RCP B, AOV-270B
- d. IF reactor trip was NOT
- required, THEN go to Step 4.
EOP:
AP-RCP. 1 RCP SEAL MALFUNCTION REV:
10 PAGE 5 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2
Check RCP Seal Return Valve Alignment:
a.
RCP seal return isolation valve, MOV-313 -
OPEN a.
Perform the following:
- 1) Ensure CI reset.
- 2) Ensure both trains of XY relays for RCP seal return isolation valve, MOV-313,
'eset.
- 3) Open RCP seal return isolation valve, MOV-313.
- b. Verify RCP seal disch valves OPEN
~ RCP A, AOV-270A
~ RCP B, AOV-270B IF MOV-313 can NOT be opened, THEN dispatch AO to AUX BLDG with RWST area key to check valve and breaker locally (breaker MCC C position 13J).
- b. Manually open valves.
IF valves can NOT be opened, THEN verify IA aligned to CNMT and go to Step 3.
EOP:
AP-RCP.1 T!TLE:
RCP SEAL MALFUNCTION REV 10 PAGE 6 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
o If a reactor 'trip is initiated while performing Step 3, transition to E-0 should occur while completing subsequent actions of the step.
o The 0.8 GPM limit for ¹1 seal flow applies when the RCS is at normal operating pressure.
Refer to Figure RCP SEAL LEAKOFF and consult plant staff for guidance if the RCS is at reduced pressure.
3 Check Total gl Seal Flow BETWEEN 0.8 GPM AND 6.0 GPM IF ¹1 Seal Inlet and Outlet temperatures are increasing, THEN perform the following:
- a. IF reactor trip breakers
- closed, THEN trip the reactor.
- b. Trip the affected RCP(s).
- c. Allow 4 minutes for pump coast
- down, THEN close affected RCP(s) seal disch valve.
~ RCP A, AOV-270A
~ RCP B, AOV-270B IF ¹1 Seal Inlet and Outlet temperatures are stable, THEN perform the following while continuing with this procedure.
o IF total ¹1 Seal Flow greater than 6.0
- gpm, THEN maintain seal injection flow rate of 9.0 GPM or greater to the affected RCP.
o IF total ¹1 Seal flow exceeds 8.0 GPM OR Seal Inlet/Outlet temperatures begin to increase, THEN return to Step l.
o Prepare for orderly pump shutdown by placing the plant in Hot Shutdown using 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN.
o Secure the affected RCP with 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
EOP:
AP-RCP.1 RCP SEAL MALFUNCTION REV:
10 PAGE 7 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4
Check RCP Cooling:
o Annunciator A-7, RCP A CCW RETURN HIGH TEMP OR LOW FLOW-EXTINGUISHED o
Annunciator A-15, RCP B
CCW RETURN HIGH TEMP OR LOW FLOW EXTINGUISHED
'Perform the following:
~ RCP A, MOV-749A and MOQ-759A
~ RCP B, MOV-749B and MOV-759B b.
Ensure open CCW outlet valves from RCP thermal barriers.
~ RCP A, AOV-754A
~ RCP B, AOV-754B 5
Check RCP 42 Seal Indications:
o 'nnunciator B-3, RCP A STANDPIPE HI LEVEL +1 FT - EXTINGUISHED o
Annunciator B-4, RCP B STANDPIPE HI LEVEL +1 FT - EXTINGUISHED IF affected RCP ¹1 seal leakoff flow decreasing, THEN failure of ¹2 seal may be indicated.
Continue plant operation while 'closely monitoring RCP seal indications.
EOP:
AP-RCP.1 TITLE:
RCP SEAL MALFUNCTION REV:
10 PAGE'8 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION REDUCING CHARGING FLOW WILL RESULT IN INCREASING REGEN HX OUTLET TEMPERATURE.
6 Check RCP Labyrinth Seal D/Ps GREATER THAN 15 INCHES OF WATER Perform the following:
a.
Ensure open CCW outlet valves from RCP thermal barriers.
~ RCP A, AOV-754A
~ RCP B, AOV-754B
- b. Verify seal injection flow greater than 5
GPM for affected RCPT
- c. Adjust HCV-142 as necessary.
- d. Dispatch AO to check seal injection filter D/P.
e.
Check CCW surge tank level stable.
IF level increasing, THEN go 'to AP-CCW.1, LEAKAGE INTO THE COMPONENT COOLING LOOP.
7 Check RCP N3 Seal Indications:
o Annunciator B-ll, RCP A STAND PIPE LO LEVEL -4FT - EXTINGUISHED o
Annunciator B-12, RCP B STAND PIPE LO LEVEL -4FT -
EXTINGUISHED Check CNMT radiation monitors normal' R-ll
~ R-12 IF RCP standpipe level low and CNMT radiation increasing, THEN ¹ 3 seal leakage increase is probable.
Continue plant operation while closely monitoring RCP seal indications.
EOP:
AP-RCP.1 T!TLE:
RCP SEAL MALFUNCTION REV:
10 PAGE 9 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
In the absence of other seal failure indications, an elevated ¹1 seal outlet temperature may indicate pump bearing damage.
- 8 Monitor Plant Conditions:
a.
RCP ¹1 seal flow o
Total ¹1 seal leakoff flow-LESS THAN 6.0 GPM o
Total ¹1 seal flow -
GREATER THAN 0.8 GPM e
b.
RCP ¹1 Seal Flow - WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF
- a. IF affected RCP running, THEN return to Step 1.
IF NOT, THEN perform the following:
- 2) Consult Plant Staff to determine if cooldown required.
b; Perform the following:
o Ensure seal injection flow exceeds
¹1 seal leakoff flow.
o Refer to S-2.1, Reactor Coolant Pump Operation.
o Consult plant staff for further instructions.
c.
RCP ¹1 seal outlet temperatures LESS THAN 215'ND STABLE
- c. IF pump bearing damage is suspected, THEN notify plant staff and expedite shutdown of the affected RCP.
IF NOT, THEN return tc Step l.
d.
RCS leakage NORMAL (Refer. to leakage surveillance sheet)
- d. Perform the following:
- 1) Calculate RCS leakrate.
- 2) Refer to ITS section 3.4e13.
AP-RCP.1 RCP SEAL MALFUNCTION REV:
10 PAGE 10 of 10 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
9 Notify Higher Supervision
-END-
I;l
EOP:
AP-RCP.1 T!TLE:
RCP SEAL MALFUNCTION REV:
10 PAGE 1 of 1 AP-RCP.1 APPENDIX LIST TITLE PAGES 1)
FIGURE RCP SEAL LEAKOFF 2)
'TTACHMENT RCP DIAGNOSTICS
EOP:
AP-RCP. 1 T!TLE:
RCP SEAL MALFUNCTION REV:
10 PAGE 1 of 1
FIGURE RGP SEAL LEAKOFF III SEAL LEAK RATE (GPH) 6 LEAK RATE INCREMENTS 0.2 GPM NORMAL OPERATING RANGE DP INCREMENTS 50 PSI 250 500 750 1000 1250 1500 1750 2000 2250 2500 81 SEAL DP (RCS PRESS VCT PRESS)
4, EOP AP-RCS.1 TITLE:
REACTOR COOLANT LEAK REV 7
PAGE 1 of 9
.ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE PLANT SUPERINTENDENT EFFEC IV DATE CATEGORY 1.0 REVIEWED BY:
EOP:
AP-RCS.1 REACTOR COOLANT LEAK REV:
7 PAGE 2 of 9 A.
PURPOSE This procedure provides the instructions necessary to mitigate the consequences of a reactor coolant leak.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
S-12.2, OPERATOR ACTION IN THE EVENT OF INDICATION OF SIGNIFICANT INCREASE IN LEAKAGE, when a significant, increase in RCS leakage is indicated.
b.
AP-CVCS.1, CVCS LEAK, when leak cannot be isolated.
2.
SYMPTOMS The symptoms of REACTOR COOLANT LEAK are; a.
Annunciator F-14, CHARGING PUMP SPEED, lit, or b.
Annunciator A-2, VCT LEVEL 144 86, lit, or c.
Annunciator E-16, RMS PROCESS MONITOR HIGH ACTIVITY, lit, or d.
Annunciator E-24, RMS AREA MONITOR HIGH ACTIVITY, lit, or e.
Annunciator F-4, PRESSURIZER LEVEL DEVIATION -5 NORMAL +5, lit, or f.
Annunciator F-10, PRESSURIZER LO PRESS 2185 PSI, lit, or g.
Annunciator F-ll, PRESSURIZER LO LEVEL 134, lit.
EOP AP-RCS.1 TITLE:
REACTOR COOLANT LEAK REV 7
PAGE 3 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF, AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS)
E-Op REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
NOTE:
Conditions should be evaluated for site contingency reporting (Refer to EPIP-1.0, GINNA 'STATION EVENT EVALUATION AND CLASSIFICATION.
1 Check PRZR Level STABLE AT PROGRAM LEVEL IF PRZR level decreasing, THEN start additional charging pumps and increase speed as necessary to stabilize,PRZR level.
IF PRZR level continues to
- decrease, THEN close loop B cold leg to REGEN Hx isolation valve, AOV-427.
IF available charging pumps are running at maximum speed with letdown isolated, AND PRZR level is decreasing, THEN trip the reactor and go to E-O, REACTOR TRIP or SAFETY INJECTION.
4
~
l
EOP:
AP-RCS.1 REACTOR COOLANT LEAK REV:
7 PAGE 4 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
IF VCT level decreases to 5%, charging pump suction wil>>wap << the RWST.
This may require a load reduction.
2 Check VCT Makeup System:
- a. Verify VCT level - GREATER THAN 5%'.
Verify the following:
1)
RMW mode selector switch in AUTO
- a. Ensure charging pump suction aligned to RWST.
~ LCV-112B -
OPEN
~ LCV-112C - CLOSED
- b. Ad5ust controls as necessary.
2)
RMV control armed - RED LIGHT LIT
- c. Check VCT level:
o Level GREATER THAN 20%
-OR-o Level -
STABLE OR INCREASING
- c. Check letdown divert valve, LCV-112A, closed.
IF VCT makeup flow NOT adequate, THEN perform the following:
- 1) Ensure BA transfer pumps and RMV pumps running.
- 2) Place RMV flow control valve, HCV-111, in MANUAL and increase RMW flow.
- 3) Increase boric acid flow as necessary.
IF VCT level can NOT be maintained, THEN refer to ER-CVCS.2, REACTOR MAKEUP CONTROL MALFUNCTION, if necessary.
I I
'1
EOP:
AP-RCS F 1 TITLE:
REACTOR COOLANT LEAK REV 7
,PAGE 5 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 3
Check If RCS Leakage In CNMT:
o Check CNMT radiation monitors-NORMAL
~ R-2
~ R-7
~ R-lOA
~ R-11
~ R-12 o
CNMT sump A pump run frequency-NORMAL (Refer to leakage surveillance sheet)
IP leakage is indicated in CNMT, THEN perform the following:
t
- b. Continue with Step 4.
WHEN CNMT cleared for entry, THEN dispatch personnel to investigate CNMT for RCS leakage.
CAUTION HEALTH PHYSICS TECHNICIAN SHOULD BE CONSULTED PRIOR TO ENTERING A HIGH AIRBORNE AREA.
- * * * * * * * * * * * * * * * * * * * * * * * *
- k * * * * * * * * * * * * *
- w 4
Dispatch AO To AUX BLDG To Investigate For CVCS Leak (locked area keys required) 5 Check For Leak To CCW System:
o CCW surge tank level-APPROXIMATELY 50X AND STABLE Go to AP-CCW.1, LEAKAGE INTO THE COMPONENT COOLING LOOP.
o CCW radiation monitor, R NORMAL I
6 AP-RCS-1 TITLE:
REACTOR COOLANT LEAK REV 7
PAGE 6 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6
Check CVCS Conditions:
a.
Letdown indication:
o Letdown flow - APPROXIMATELY 40 GPM o
Low pressure LTDN pressure-APPROXIMATELY 250 PSIG
- a. IF letdown isolated, THEN continue with Step Sb.
TR NOT
- isoleted, TNSN go to AP-CVCS.1, CVCS LEAK, Step 5.
o Letdown pressure control
- valve, PCV-135, demand-APPROXIMATELY 35%
OPEN
- b. Charging indication:
o Seal injection flows-GREATER THAN 6 GPM AND STABLE f
b.
Go to AP-CVCS.1, CVCS LEAK, Step 5.
o RCP Labyrinth seal D/Ps-GREATER THAN 15 INCHES AND APPROXIMATELY EQUAL o
Charging pump discharge pressure
- GREATER THAN RCS PRESSURE c.
AUZ BLDG radiation levels-NORMAL
~ R-4
~ R-9
~ R-10B
~ R-13
~ R-14 c.
Go to AP-CVCS.1, CVCS LEAK, Step 5 and refer to CVCS piping diagrams for further guidance.
4
(
"i
EOP:
AP-RCS.1 TITLE:
REACTOR COOLANT LEAK REV:
7 PAGE 7 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7
Check PRT Indications:
- a. Level -
BETWEEN 61% AND 84%
- b. Pressure
- APPROXIMATELY 1.5 PSIG AND STABLE
- c. Temperature
- AT CNMT AMBIENT TEMPERATURE AND STABLE Check tailpipe and valve leakoff temperatures for the PRZR safety valves and PORVs for indication of leakage.,
IF no PORV or safety valve leakage is indicated, THEN check other leak paths from the RCS to the PRT.
~ Letdown relief valve, RV-203
~ Seal return relief valve, RV-314 CAUTION STEAM GENERATOR TUBE LEAKAGE IN ONE S/G SHALL,NOT EXCEED 0.1 GPM WHEN AVERAGED OVER 24 HOURS.
8 Check S/Gs For Leakage:
o Air ejector radiation monitors-NORMAL IF S/G tube leak indicated, THEN refer to 0-6.10, PLANT OPERATION WITH A S/G TUBE LEAK INDICATION.
~ R-15
~ R-15A o
S/G blowdown radiation monitor (R-19) - NORMAL o
Steamline radiation monitors-NORMAL
~ R-31
~ R-32 o
S/G sample activity - NORMAL (Check with HP Department for normal)
e
~
~ I 4
EOP:
AP-RCS F 1 REACTOR COOLANT LEAK REV:
7 PAGE 8 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9
Check SI Accumulator Levels
j Calculate in leakage to SI STABLE accumulators (Refer to S-16.11, MONITORING INLEAKAGE TO SI ACCUMULATORS).
10 Check RCP Seal Leakoff Flows:
o Leakoff flows - BETWEEN 0.25 GPM AND 5.5 GPM o
Leakoff flows - STABLE Go to AP-RCP.l, RCP SEAL MALFUNCTION.
11 Check RCDT Leak Rate NORMAL (Refer to RCS Daily Leakage Log and PPCS point ID L1003)
Check other sources of in leakage to RCDT:
- a. IP Rx vessel flange leakoff temperature has increased, THEN close Rx VESS FLANGE SEAL LEAKOPP VLV, AOV-521.
- b. Verify excess letdown isolated.
IP NOT, THEN ensure RCDT divert
- valve, AOV-312, in the VCT positi'on.
- c. IP source of leakage NOT determined, THEN suspect loop drains.
12 Check Valve Leakoff Temperatures NORMAL (Refer to Pressurizer Valve Leak-Off Temperature Record Log)
IP any valve leakoff temperature is abnormally high, THEN initiate investigation of that leakage path.
l
EOP:
AP-RCS F 1 REACTOR COOLANT LEAK REV 7
PAGE 9 of 9 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13'stablish Stable Plant Conditions:
a.
PRZR level - TRENDING TO PROGRAM
- b. Check PRZR pressure control:
o Pressure
- TRENDING TO 2235 PSIG o
PRZR backup heaters
- OFF
- a. Control charging and letdown flows to restore PRZR level to program.
- 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.1, ABNORMAL PRESSURIZER PRESSURE.
14 Evaluate RCS Leakage:
a.
Leakage within limits (Refer to leakage surveillance sheet and Tech Spec section 3.1.5)
- b. Leak location identified
- a. IF leak NOT isolable, but PRZR level and seal injection can be maintained, THEN shut the plant down as quickly as possible (Refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOVN).
- b. Return to Step 1.
NOTE:
Refer to 0-9.3, NRC STATE AND COUNTIES IMMEDIATE NOTIFICATION, for reporting requirements.
15 Notify Higher Supervision
,-END-
4I
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