ML17264A978

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Rev 12 to AP-RCS.1, Reactor Coolant Leak.
ML17264A978
Person / Time
Site: Ginna Constellation icon.png
Issue date: 08/05/1997
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17264A976 List:
References
AP-RCS.1, NUDOCS 9708130138
Download: ML17264A978 (14)


Text

EOP: AP-RCS.1 REACTOR COOLANT LEAK REV: 12 PAGE 1 of 11 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER RESPONSIB MANAGER EFFECTIVE DATE CATEGORY 1.0 REVIEWED BX: 9708130%38 970805 PDR ADQCK 05000244 EOP: AP-RCS.1 REACTOR COOLANT LEAK REV: 12 PAGE 2 of 11 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,'r f.Annunciator F-10, PRESSURIZER LO PRESS 2185 PSI, lit, or g.Annunciator F-11, PRESSURIZER LO LEVEL 134, lit.

EOP: AP-RCS.1 REACTOR COOLANT LEAK REV: 12 PAGE 3 of 11 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.

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.

EOP: AP-RCS.1 T1TLE: REACTOR COOLANT LEAK REV: 12 PAGE 4 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: IF VCT level decreases to 5%, charging pump suction will swap to the RWST.This may require a load reduction.

2 Check VCT Makeup System: a.Verify VCT level-GREATER THAN 5a a.Ensure charging pump suction aligned to RWST.~LCV-112B-OPEN~LCV-112C-CLOSED b.Verify the following:

1)RMW mode selector switch in AUTO b.Adjust controls as necessary.

2)RMW 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 RMW pumps running.2)Adjust RMW flow control valve, HCV-111, to increase RMW flow.3)Increase boric acid flow as necessary to maintain required concentration.

IF VCT level can NOT be maintained, THEN refer to ER-CVCS.1, REACTOR MAKEUP CONTROL MALFUNCTION, if necessary.

EOP: AP-RCS.l TITLE: REACTOR COOLANT LEAK REV: 12 PAGE 5 of ll 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 RCS Daily Leakage Log)IF leakage is indicated in CNMT, THEN perform the following:

a.Direct HP to sample CNMT for entry.b.Continue'with Step 4.WHEN CNMT cleared for entry, THEN dispatch personnel to investigate CNMT for RCS leakage./CAUTION RADIATION PROTECTION TECHNICIAN SHOULD BE CONSULTED PRIOR TO ENTERING A HIGH AIRBORNE AREA.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 50%AND'TABLE Go to AP-CCW.1, LEAKAGE INTO THE COMPONENT COOLING LOOP.o CCW radiation monitor, R-17-NORMAL EOP: AP-RCS.1 TITLE: REACTOR COOLANT LEAK REV: 12 PAGE 6 of 11 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 6b.IF NOT isolated, THEN go to AP-CVCS.1, CVCS LEAK, Step 6.o Letdown pressure control valve, PCV-135, demand-APPROXIMATELY 35%OPEN b.Charging indication:

o Seal injection flows GREATER THAN 6 GPM AND STABLE b.Go to AP-CVCS.1, CVCS LEAK, Step 6.o RCP Labyrinth seal D/Ps GREATER THAN 15 INCHES AND APPROXIMATELY EQUAL o Charging pump discharge pressure-GREATER THAN RCS PRESSURE c.AUX BLDG radiation levels NORMAL~R-4~R-9~R-10B~R-13~R-14 c.Go to AP-CVCS.1, CVCS LEAK, Step 6 and refer to CVCS piping diagrams for further guidance.

EOP: AP-RCS.1 TlTLE: REACTOR COOLANT LEAK REV: 12 PAGE 7 of 11 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 RP Department for normal)

EOP: AP-RCS.1 REACTOR COOLANT LEAK REV: 12 PAGE 8 of 11 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 9 Check SI Accumulator Levels-STABLE Calculate inleakage to SI accumulators (Refer to S-16.11, MONITORING INLEAKAGE TO SI ACCUMULATORS).

10 Check RCP Seal Leakoff Flows: o Leakoff flows-WITHIN THE NORMAL OPERATING RANGE OF FIGURE RCP SEAL LEAKOFF Go to AP-RCP.l, RCP SEAL MALFUNCTION.

o Leakoff flows-STABLE 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.IF Rx vessel flange leakoff temperature has increased, THEN close Rx VESS FLANGE SEAL'EAKOFF VLV, AOV-521.b.Verify excess letdown isolated.IF NOT, THEN ensure RCDT divert valve, AOV-312, in the VCT position.c.IF source of leakage NOT determined, THEN suspect loop drains.

EOP: AP-RCS.1 TITLE REACTOR COOLANT LEAK REV: 12 PAGE 9 of ll STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 12 Check Valve Leakoff Temperatures

-NORMAL (Refer to Pressurizer Valve Leak-Off Temperature Record Log)IF any valve leakoff temperature is abnormally high, THEN initiate investigation of that leakage path.13 Establish 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,l, ABNORMAL PRESSURIZER PRESSURE, 14 Evaluate RCS Leakage: a.Leakage within limits (Refer to leakage surveillance sheet and ITS section 3.4.13)b.Leak location identified a.IF leak NOT isolable, but PRZR level and seal injection can be maintained, THEN shut the plant down (Refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN or AP-TURB.5, RAPID LOAD REDUCTION).

b.Return to Step l.

AP-RCS.1 REACTOR COOLANT LEAK REV: 12 PAGE 10 of ll STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.

15 Notify Higher Supervision-END-EOP: REACTOR COOLANT LEAK REV: 12 PAGE 11 of ll AP-RCS.1 APPENDIX LIST TITLE PAGES 1)FIGURE RCP SEAL LEAKOFF EOP: AP-RCS.1 TITLE: REACTOR COOLANT LEAK REV: 12 PAGE 1 of 1 FIGURE RCP SEAL LEAKOFF kl SEAL LEAK RATE (GPH)6 LEAK RATE INCREHENTS 0.2 GPH 3 NORHAL OPERATING RANGE DP INCREHENTS 50 PSI 250 500 750 1000 1250 1500 1750 2000 2250 2500 81 SEAL DP (RCS PRESS-VCT PRESS)PSI J