ML20136H524

Monthly Operating Rept for Oct 1985

ML20136H524
Person / Time
Site:	Limerick
Issue date:	10/31/1985
From:	Alden W, Logue R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8601100040
Download: ML20136H524 (8)

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4 I OPCATIHS DATA LEPORT DOCKET HD. 50 352 DATE NOVEteER 15, 1985 COMPLETED BY Mf!LADELPHIA ELECTRIC COMPANY W.M.ALDEN FNrtTHEER-IN-CHARGE LICENSING SECTION HUCLEAR GENERATION DIVISI0H TELEPHONE I2153 841-5022 OPERATIHS STATUS

1. UNIT HAME8 LIMERICK UNIT 1 l NOTES THE UNIT INCURRED ONE l

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2. REPORTING PERIDO OCTOBER, 1985 l SCHEDULED SHUT 00bR4 FOR l

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3. LICENSED THERMAL POWERittlTit 3293 l TESTING ONE AUTO-SCRAM, l

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4. NAMEPLATE RATINS (GROSS MWEls 1992 l Ape ONE FORCED LOAD REDUCTION l

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5. DESIGN ELECTRICAL RATING (HET PteEl* 1055 l l

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6. NAXIMUM DEPDeABLE CAP 8 CITY (GROSS teltli .

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7. MAXIMUM DEPDeABLE CAPACITY INET tt4Els .

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8. IF CHANGES OCCUR IN CAPACITY RATINGS (ITEMS HUMBER 3 THROUGH 7) SIHCE LAST REPORT. SIVE REASONS

9. POWER LEVEL TO betICH RESTRICTED IF ANY (HET PG4 Ele

10. EEASONS FOR RESTRICTIONSe IF ANY8 THIS MONTH YR-TO-DATE CLMULATIVE

11. HOURS IN REPORTING PERIDO 745

............ .....4..e.83.3 ... 4. 8 33..

12. HUPRER OF HOURS REACTOR WAS CRITICAL 603.6 3.230.0 3,267.7 13e REACTOR RESERVE SHUTDOWN H0tAIS 0.0 0.0 0.0

14. HOURS SEHERATOR ON-LINE 567.2 1,494.6 1.494.6

15. UNIT RESERVE SHUTDONN HOURS 0.0 0.0 0.0 1

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16. GROSS THERMAL ENER6Y SENERATED (Ptet) 941.899 l e %5,076 1.965.076

17. GROSS ELECTRICAL ENERGY SENERATED (Pteil 261,908 441.086 441.084

18. HET ELECTRICAL EHERGY GENERATED titell 24te341 366.479 366.479 19e UNIT SERVICE FACTOR 76.1 20.5 18.6 i 0601100040 851031 PDR ADOCK 05000352 *

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20. UNIT AVAILABILITT FACTOR 76.I 20.5 18.6  ;

21. LMIT CAPACITY FACTOR (USING MDC NET) a e *  !

2E. LMIT CAPACITY FACTOR (USING DER NET) e a m

23. UNIT FORCED OUTAGE RATE O.0 0.0 0.0

24. SHUTDONHS SCHEDULEO OVER NEXT 6 MONTHS ITYPEe DATE. AHD DURATION OF EACHis UNIT 81 IN STARTUP TESTING.  !

25. IF SHUTDC644 AT Ett OF REPORT PERIOD. ESTIMATED DATE OF STARTUPt

26. UNIT 3 IN TEST STATUS (PRIOR TO C0ft1ERCIAL OPERATIDHit FORECAST ACHIEVED

. INITIAL CRITICALITY 12/19/84 12/22/84 IHITIAL ELECTRICITY MID APRIL 85 4/13/85 CorttERCIAL OPERATION IST QTR 86 O NOT APPLICABLE PRIOR TO CCP.?tERCIAL OPERATIDH I

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C AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50 - 352 UNIT LIMERICK LMIT 1 DATE HOVEteER 15. 1965 COMPANY PHILADELPHIA ELECTRIC COMPANY W.H.ALDEN ENGINEER-IN-CHARGE LICENSING SECTION

$5JCLEAR GENERATION DIVISION TELEPHONE t215) 841-5022 HONTH OCTOBER 1985 CAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL OteE-NETI (MWE-NETI 1 - 305 17 448 2 397 18 260 3 394 19 397 0 407 20 404 5 418 21 409 4

6 381 22 421 7 409 23 418 8 190 24 423 9 0 25 468 10 0 26 540 11 0 27 491 12 0 ft 510 13 0 29 617 14 0 30 620 15 0 31 606 i 16 243 3

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• l UNIT SHUTD0bMS Ape PONER REDUCTIONS DOCKET NO. 50 352 LMIT HAME LIMERICK LMIT 1 DATE HDYEteER 15. 1985 REPORT MotCH OCTOBER, 1985 CtmPLETED BY PHILADELPHIA ELECTRIC COMPANY N.M.ALDEN ENGINEER-IN-CHAAGE LICENSING SECTION MJCLEAR GEHERATION DIVISION TELEPHONE (215) 841-5022 l l l l l METHOD OF l LICENSEE lSfSTEMICOMPONENTl CAUSE Ate CORRECTIVE l lTYPflDutATIOHlREASONISHUTTING DonMl EVENT l CODE l CODE l ACTION TO' '

H0.1 DATE I (131 (HOURSil (2) l REACTOR (31 l REPORTekI (4) l (5) l PREVENT RECURRENCE I I I I l l l 'I I O 1 851001 i S l 156.5 1 B1 4 i HA l ZZ l ZZZZZZ l PLAINED TURBINE TRIP FOR STPt7.3, MAIN TURBINE i l l I l l l l l TRIP FOR TC.3 BY ACTUATING THE MANUAL TURBIHE I l l l l l l l l TRIP PUSHBUTTON FOLLONED BY REACTOR SCRAM Ate i l l l l l l l l l CLOSUPE'0F 4 MAIN TURBINE STOP VALVES.

I I I i 1 1 I I i le 1 851015 l F l 921.3 i H l 3 1 85-83 l HH l PUMPXX l LON LEVEL REACTOR SCRAM CAUSED BY REACTOR l l I l l l l l l PRESSURE INCREASING BETOND THE CAPABILITY OF 1 l l l l l l l l THE ColeENSATE PUMPS PilIOR TO REACTOR F8EDPLMPS l l I I l l l l l BEING PLACED IN SEEVICE.

I I I I I I I 1 1 II l 851031 l F l 000.0 i H l 4 i NA l EB l ELECON 1 LOAD REDUCTION FROM 68% TO 43% DUE TO RECIRC I l l l l l l l l RUleACK CAUSED BY LOOSE CotNECTION AT PIN 3 l l l l l l l l l ON PONER SUPPLY C.3t-K163.

I i 1 ----- 1 I I I I I l l l 177.8 I l l l l l s

(1) (El (3) (4) i P FORCED REASON METHOD EXHIBIT G . INSTRUCTIONS l B . SCHEDULED A . ERUIPMENT FAILURE (EXPLAIH) 1. HAMJAL FOR PREPARATION OF DATA B - MAINTENANCE OR TEST 2 . MANUAL SCRAM. ENTRY SHEETS FOR LICENSEE C . REFUELINS 3 AUTOMATIC SCRAM.- EVENT REPORT (LER)

D RESULATORY RESTRICTION 4 . OTHER (EXPLAINI , g FILE (HUREG-0161)

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

S . OPERATIONAL ERROR (EXPLAINI f

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H . OTHER(EXPLAIN) EXHIBIT g . SAffE SOURCE l

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Dockot No. 50-352 Attachment to Monthly Operating Report for October, 1985 Limerick Generating Station Unit 1 October 1 through October 31, 1985 I. Narrative Summary of Operating Experiences The unit began the month at approximately 48% power.

On October 8, while clearing a block on the "A" Standby Liquid Control (SBLC) pump, an unexpected pump start occurred injecting sodium pentaborate solution into the reactor pressure vessel ( RPV) . The SBLC system was shutdown af ter an assessment of plant conditions confirmed that the boron injection was not required. The reactor water conductivity increased to approximately 6.5 micromhos/cm as a result of the sodium pentaborate injection. After the SBLC injection, a planned turbine trip test was performed successfully resulting in the expected reactor scram. The unit was placed in the cold shutdown condition, thereby satisfying the reactor water chemistry requirements of the Technical Specifications.

The cause of the SBLC injection has been traced to a design deficiency (relay race) in the pump's start logic. A permanent resolution is under review by the Engineering &

Research Department.

On October 14, the reactor was restarted. The next day, the unit scrammed from 2% power on reactor low water level.

The reactor water level dropped due to reactor pressure increasing beyond the capability of the condensate pumps prior to reactor feedpumps being placed in service. The reactor was restarted and the turbine-generator was synchronized the same day.

On October 31, load was reduced from 68% to 34% due to a recirculation runback caused by a loss of the total feedwater flow input to the runback circuitry. The loose connection on the 24 Volt DC power supply, that caused disruption to instrumentation in the power chamber, was l reconnected and the unit returned to power escalation.

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The unit ended the report period in start-up testing at  !

approximately 68% power.

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Dockat No. 50-352 Attachment to Monthly Operating Report for October, 1985 Page 2 II. Challenges to Relief Valves During this month, there were no challenges'to the main steam system safety-relief valves.

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PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 (21510414000 November 15, 1985 Docket No. 50-352 Director Office of Resource Management US Nuclear Regulatory Commission Washington, DC 20555

SUBJECT:

Limerick Generating Station Monthly Operating Report Gentlemen:

Enclosed is the monthly operating report for Limerick Unit 1 for the month of October, 1985 forwarded pursuant to Technical Specification 6.9.1.6.

Very truly yours, t

1. l/

R. H. Logue Superintendent Nuclear Services Attachment cc: Director, Office of Inspection & Enforcement, USNRC (12 copies)

Dr. T. E. Murley, NRC Mr. Stan P. Mangi, PA Dept. of Envir. Resources Mr. P. A. Ross, NRC (2 copies)

INPO Records Center See Attached Service List 4