ML20042G939

Monthly Operating Repts for Apr 1990 for Limerick Generating Station,Units 1 & 2.W/900509 Ltr

ML20042G939
Person / Time
Site:	Limerick
Issue date:	04/30/1990
From:	Leitch G, Meck K PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9005160312
Download: ML20042G939 (11)

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i ToSo6090le6 PHILADELPHIA ELECTRIC COMPANY LIMERICK GENER ATING STATION P. O. DOX A SAN ATOG A. PENNSYLV ANI A 19464 (213) 3271200, EXT. 3000 l

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May 9, 1990 Docket Nos. 50-352 50-353 License Nos. NPF-39 NPF-85 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 l

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Subject:

Limerick Generating Station Monthly Operating Report For l Units 1 and 2 l

Enclosed are the monthly operating reports for Limerick Units 1 and 2 for the month of April, 1990 forwarded pursuant to Technical Specification 6.9.1.6.

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Very truly yours, o k/d .. u KWM/dms Enclos,ure cc: T. T. Martin, Administrator, Region I, USNRC T. J. Kenny, USNRC Senior Resident Inspector f.h[

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3906003570 Docket No. #50-352 Attachment to Monthly Operating Report for April 1990 LIMERICK GENERATING STATION UNIT 1 APRIL 1 THROUGH APRIL 30,1990

1. NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES Limerick Unit 1 began the month of April at 100% of rated thermal power. On April 5, reactor power was reduced to 90% to accommodate main turbine control valve testing. On April 19, the '1B' condenser waterbox was removed from service for condenser tube leak repairs, On April 21, reactor power was reduced briefly to 08% due to turbine bl0h back pressure. On April 23, reactor power was again reduced briefly 1o 94% due to turbine high back pressure. On April 24, the '1B' condenser waterbox was retumed to service. Limerick Unit 1 ended the month of April at a nominal 100% of rated thermal power.

Operational events that occurred during the month of April included:

On April 5, the main control room was manually isolated when a high toxic chemical concentration alarm was received in the control room. Following investigation, it was determined that the alarm was caused by a failed 'B' toxic gas monitor. The monitor was removed from service and repaired. After the monitor was returned to service, the main control room isolation was reset. On April 6, another high toxic chemical concentration alarm was received. The main control room was manually iso-lated until It was determined that the 'B' toxic gas monitor had caused another spurious alarm. Subsequently, the 'B' detector was replaced, the filter servo motor was lubricated, and the monitor was retumed to service. The 'B' toxic gas monitor has operated satisfactorily following the repair.

On April 20, the 'B' ESW loop was found to be inoperable when the 'B' ESW pump discharge check valve was found partially open and could not be closed. The check valve had been previously blocked for maintenance work and had been incorrectly reassembled. The Inoperable condition was found during post maintenance testing.

The condition was corrected immediately.

On A'.ril 27 a one hour notification was made to the NRC when it was discovered that tne offsite sirens could.nct beJnterrogated due to a.tadio signal irder. l ference. It was later verified that the sirens could be activated if required.

The source of the interference was found and eliminated. On April 29, the problem was resolved and the cirens were retumed to normal.

11. CHALLENGES TO MAIN STEAM SAFETY REllEF VALVES There were no challenges to the Main Steam Rollet Valves during the month of April.

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i p OPECTING DATA CEPORT DOCKET NO. 50 - 352 390600357.0.

DATE MAY 2.1990

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. COMPLETED sv PHILADELPHI A ELECTRIC COMPANY , .

MARL MECK REPORTS SUPERVISOR BUSINESS UNIT-LINERICE-GENERATING STATION TELEPHONE (215) 327-1200 EXTENSION 3320 OPERATING STATUS 1 UNIT NAME: LINERICK UNIT 1 l NOTES: THERE WAS NO LOAD I

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2. REPORTING PERIOD: iAPRIL. 1990 l REDUCTION GREATER l g y

3. LICENSED THERMAL POWER (wwT): 3293 l THAN 20% THIS MONTH. l i

. I 4 NAMEPLATE RATING (GROSS #wE): 1138 l l'

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5. DESIGN ELECTRICAL RATING (NET uwE): 1055 l l I 1

6. WAXIMUm DEPENDABLE CAPACITY (GROSS WWE): 1992 l 'l

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7. MAXINUm DEPENDABLE CAPACITY (MET uwE): 1055 l 1

8. IF CHANGES OCCUR IN CAPACITV RATINGS (ITEMS MUwSER 3 THROUGH 7) SINCE LAST REPORT. GIVE REASONS:

9. POWER LEVEL TO WHICH RESTRICTED. IF ANY (NET WWE):

10. REASONS FOR RESTRICTIONS. IF ANY:

THIS MONTH : YR-TO-DATE CUWULATIVE 11 HOURS-IN REPORTINGPERIbD 719 2.879 37,199

- 12.' NUWSER OF HOURS REACTOR WAS CRITICAL 719.0 2.879.0 30'007.8'

13. REACTOR RESERVE SHUTDbwN HOURS 0.0 0.0 0. 0 ..

14 HOURS GENERATOR ON-LINE: 719.0- 2.879.0 29.550.6

15. UNIT RESERVE SHUTDOWN MduRS 0.0- - 0.0- 0.0 '

16. GROSS THERMAL ENERGY GENERATED (wwH) 2.365.202 9.267.910 87.131.350

17. GROSS ELECTRICAL.ENERGVLGENERATED (wwH) 762.940 3.000.870 c. 26.187.440 ~

18. NET' ELECTRICAL ENERGV. GENERATED (wwH) 735.545 2.894.846 c26.951.242-q PAGE 1 OF 2-

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- OPEm TING DATA REPORT (CONTINUE 3) - -DOCRET NO. 50'- 352 '

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DATE mAV 2.1990 -

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THIS WOMTH .YR-TO-DATE CUWULATIVE: ,

19. UNIT SERVICE FACTOR e 100.0 100.0 79.4.

20. UNIT AVAILABILITV F ACT.. Od 100.0 100.0 '79.4.

21. UNIT CAPACITV FACTOR (USING WDC NET) 97.0 '95.3 '66.7 22.' UNIT CAPACITV FACTOR (USING OER NET) 97.O' 95.3 .66.7

23. UNIT FORCED OUTAGE RATE:- 0.0 0.0 .2.7 24.-SHUTDOWNS SCHEDULED OVER NEXT 6 WONTHS'(TYPE. DATE. AND DURATION-OF EACH):

REFUELING OUTAGE: SEPTEMBER 07.1990: 75 DAVS ,

25. IF SHUTDOWN AT END DF REPORT PERIOD. ESTIMATED DATE OF STARTUP: ~

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26. UNITS IN TEST STATUS (PRIOR TO COumERCIAL OPERATION): . FORECAST ACHIEVED.

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INITIAL CRITICALITY 12/19184 12/22/84 i 5 .

' INITIAL ELECTRICITV 'mID APRIL 85 4/13/95'

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COMMERCIAL OPERATION 1ST OTR 86 2/01/86

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tfMIT. SHUTDOWNS AND POWER REDUCTIONS -DOCMET NOJ SO - 352 UNIT MAWE LINERICG UNIT ? 39060.035.7.01

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DATE mAV 2.1990 ,

REPORT MONTH APRIL. 1990 CO#PLETED BV PHILADELPHIA ELECTRIC COMPANY . .

KARL WECM ,

REPORTS SUPERVISOR SUSINESS UNIT LIWERICK GENERATING STATION TELEPHONE (215) 327-1200 EXTENSION 3320 1 l l l NETHOD OF 1 LICENSEE ISYSTEmlCOMPONENTI CAUSE AND CORRECTIVE I TVPElDURATIONlREASONl SHUTTING DOtrol EVENT l CODE I CODE I ACTION TO NO.! DATE (1)] (HOURS)] (2) 1 REACTOR (3) l REPORT a I (4) 1 (5) l PREVENT RECURRENCE I I I I I I i- 1 i 12 1 900405 ' S I 000.0 i B l 4 i N/A l ZZ l ZZZZZZ l LOAD WAS REDUCED 10% TO ACCOMODATE #AIN I i l l. l l l TURSIME CONTROL VALVE TESTING.

I  ! I i i I I-13 900421 S l 000.0 l F. l 4 N/A' I ZZ l 777777 l LOAD WAS REDUCED 2% DUE TO TURSINE HIGH l l l l l BACK PRESSURE.

1 I I I I i 10 l 900423 i S I C00.0 1 F 4 l N/A l ZZ l ZZZZZZ l LOAD WAS REDUCED 6% DUE TO Tum?INE HIGH I l l l 1 l l l BACE PRESSURE.

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F - FORCED REASON t NETHOD EXHIBIT G INSTRUCTIONS S - SCHEDULED A - EOUIPMENT FAILURE (EXPLAIN) 1 - MANUAL FOR PREPARATIOs* OF DATA e - MAINTENANCE 04 TEST 2 - MANUAL SCRAM. ENTRY SHEETS FOR LICENSEE C - REFUELING' : ' 3 - AUTOMATIC SCRAM. EVENT REPORT (LER)

D - REGULATORY RESTRICTION 4 - OTHER (EXPLAIN) FILE (NUREG-0161)

E - OPERATOR TRAINING + LICENSE EXAMINATION F - ADMINISTRATIVE' (S)

G - OPERATIONAL ERROR (ENPLAIN)'

H - OTHER(EXPLAIN) EXHISIT I - SANE SOURCE

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.," 3906003570 Docket No. #50 353 Attachment to Monthly Operating Report for April 1990 LIMERICK GENERATING STATION

• UNIT 2 APRll1 THROUGH APRIL 30,1990

1. NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES Umerick Unit 2 began the month of April in OPCON 4. The unit had been shut down during the month j of March due to an Electrohydraulic Control system oil leak and reactor coolant conductivity problems as a result of a main condenser tube leak. On April 2, the unit entsrod OPCON 2 at 2017 hours0.0233 days <br />0.56 hours <br />0.00333 weeks <br />7.674685e-4 months <br /> and criticality was achieved at 0142 hours0.00164 days <br />0.0394 hours <br />2.347884e-4 weeks <br />5.4031e-5 months <br /> on April 3. OPCON 1 was entered at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br /> on April 3, and the main generator was synchronized the same day. Power ascension was held at 80% due to feedwater -

chemistry limitations. On April 6, reactor power was increased from 80% to 100% when feedwater chemistry reached acceptable limits. On April 10, reactor power was reduced to 15% to accomodate a control rod pattern adjustment. On April 23, rasetor power was reduced to 80% in response to increasing reactor coolant conductivity and feedwater copper concentration. Investigation determined the abscence of any major condenser tube leaks and a program to improve condensate filter domineralizer offectiveness was initiated. Reactor power was returrved to 100% on April 29 when feedwater chemistry returned to acceptable limits. Limerick Unit 2 end'.,d the month of April at a nominal 100% of rated thermal power.

Operational events that occurred during the month of April included:

The primary containment instrument Oas (PCIG) system suction and the PCIG '2B' header supply isolated during Installation of

• banana jacks

• In the system control circuitry These test jacks were being installed to accomodate PCIG emergency vent procedure testing activilles. During the test Jack installation, circuit continuity was broken, causing an isolation signa' to ' seal-in', Jumpers had been previously Installed to prevent closure of the outboard PCIG valves during test jack installation. Following test jack Installation, the jumpers were removed prior to resetting the isolation signal ' seal in' This caused the outboard isolation valves I to isolate the system. Back up was provided to the PCIG '2A' header by the Instrument Air system until the Isolation was reset and the PCIG system was returned to normal, ll. CHALLENGES TO MAIN STEAM SAFETY RELIEF VALVES There were no challenges to the Main Steam Safety Relief Valvesduring the month of April.

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OPEZTING DAT3 REPORT 3 9 0 6 0 0 3 5 7,0 ;. , ,

DOCKET NO. 50 - 353 -

DATE MAV 2.1990

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COMPLETED 5:V PHILADELPHIA ELECTRIC COUPANY RARL #ECK

' REPORTS SUPERVISOR BUSINESS UNIT LIWERICK GENERATING STATION TELEPHONE (215) 327-1200 EXTENSION 3320 OPERATING STATUS 1 UNIT NAME: LINERICK UNIT 2 l NOTES: THERE WAS ONE LOAD DROP {

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2. REPORTING PERIOD: APRIL. 1990 l TO 80% AFTER THE UNIT l 1 1

3. LICENSED THERwAL POWER (wwT): 3293 I WAS RESTARTED. I I l 4 NAMEPLATE RATING (GROSS,WWE): 1138 i ( ,_

i i S. DESIGN ELECTRICAL RATING (NET mwE): 1055 l l 1 1

6. WAXIMUM DEPENDA9LE CAPACITV (GROSS wwE): 1092 1 -l

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7. MAXIMUW DEPENDA9LE CAPACITV (NET wwE): 1055 l 8

8. IF CHANGES OCCUR IN CAPACITY RATINGS (ITEMS NUMBER 3 THROUGH 7) SIkCE LAST REPORT. GIVE REASOMS

9. POWER LEVEL TO WHICH RESTRICTED. IF ANY (NET uwE):

10. REASONS FG2 RESTRICTIONS. IF ANY:

8. IF CHANGES OCCUR IN CAPACITV RATINGS (ITEMS NUMBER 3 THROUGH 7) SINCE LAST REPORT. GIVE REASONS:

THIS WONTH YR.TO-DATE CUMULATIVE

11. HOURS IN REPORTING PERIOD- '719 2.711 2.711-

12. NUMBER OF HOURS REACTOR WAS CRITICAL 670.3 2.559.9 2.559.9

13. REACTOR RESERVE'$HUTDOWN HOURS 0.0 _ O.0 = 0.0 14 HOURS GENERATOR ON-LINE: 653.3 2.480.9 2.480.9-

15. UNIT RESERVE SHUTDOWN HOURS 0.0 0.0 0.0

16. GROSS THERMAL ENERGV GENERATED (WWH)' 1.962.754 8.007.036 8.007.036

17. GROSS ELECTRICAL ENERGV. GENERATED (MwH)" 650.746 2.675.136- 2.675.136

18. NET ELECTRICAL ENERGV GENERATED (wwH) 627.037l ~ 2.578.636 2.578.636 PAGE 1 Oc 2 c

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? OPERATING i;ATA CEPORT: (CONTINUED): -DOCMET NO.,50 - 353< ,

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i3906 LOO 3570 W DATE MAY 2.1990'. ,

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'm' THIS MONTH VR-TO-DATE" Cl>MULATIVE

- 19.' UNIT SERVICE FACTOR g- -90.9 ;91.5 .91.5 -

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- 20. UNIT. AVAILABILITY FACTOR 90e9 - 91.5 - 91.5 ~

21 UNIT CAPACITY FACTOR (USING MDC NET) 82.7- 90.2 9022-

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, 22. UNIT CAPACITV. FACTOR (USING DER NET) 82.7 90.2 90.2 .

23. UNIT FORCED OUTAGE RATE: 9.1 8.5 - 8.5 24 SHUTDOWNS SCHEDULED' OVER NEXT 6 bd)NTHS (TVPE. DATE, AND DURATION OF EACH):

25. IF. SHUTDOWN AT END 0F.RkPORT PERIOD.' ESTIMATED DATE OF,STARTUP-

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26. UNITS IN TEST STATUS:(PRIOR'TO COMMERCIAL OPERATION): FORECAST ACHIEVED INITkAL'CRITICALITV' -08/12/89 08/12/89 -

INITIAL ELECTRICITV 09/01/89' 09/OU89 COMMIRkIAL OPERATION 02/01/90 .01/08/90

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7 UNIT SHUTDOWNS' CND POWER f. EDUCTIONS DOCKET NO. 53 - 353 3906003570' UNIT NAME LIMERIC3 UNIT 2 ,y .

• DATE MAY 2.1990

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REPORT MONTH APRIL, 1990 COMPLETED BY PHILADELPHIr ELECTRIC COMPANY *1 KARL WECK

' REPORTS SUPERVISOR SUSINESh UNIT-LIMERICK GENERATING STATION _

TELEPHONE'(215) 327-1200 CKTENSION 3320 l METHOD OF i LICENSEE ' SYSTEM COMPONENT' CAUSE'AND CORRECTIVE TYPE DURATION REASON l SHUTTING DOWNi EVENT . CODE CODE ACTION TO NO. DATE (1) (HOURS) (2) i REACTOR (3) P REPORT a (4) (5) PREVENT RECURRENCE

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6 900401 F 49.7 -Al 2 N/A ZZ j ZZZZZZ l REACTOR REMAINED SHUTCDwN TO PERFfEM i i CONDENSER TU5E REPAIRS.

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4 N/A Z2 ZZZZZZ ' LOAD WAS REDUCED-15% TO ACCOMODATE A

) CONTROL ROD PATTERN ADJUSTMENT.

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8 900423 S 000.0 F 4 ZZ ZZZZZZ l LOAD WAS REDUCED TO 80% DUE TO REACTOR WATER CHEMISTRY DETERIORATION.

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F - FORCED REASON .'. . METHOD EXHIBIT G - INSTRUCTIONS S - SCHEDULED A - EQUIPMENT FAILURE (EXPLAIN) 1 - MANUAL FOR PREPARATION OF DATA B - MAINTENANCE OR TEST 2-- MANUAL SCRAM. ENTRY SHEETS FOR LICENSEE C - REFUELING . l' .3 -AUTOMATIC SCRAM.' EVENT REPORT (LER)

D - REGULATORV; RESTRICTION :4 - OTHER (EXPLAIN) FILE (NUREG-0161)

E - OPERATOR TRAINING + LICENSE' EXAMINATION F - ADMINISTRATIVE (5)

G.- OPERATIONAL ERROR (EXPLAIN)

H - OTHER(EXPLAIN.)' -EXHIBIT.1:- SAME SOURCE _

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