Text

Monthly Operating Repts for Jan 1991 for Limerick Generating Station Units 1 & 2
	ML20066G481
Person / Time
Site:	Limerick
Issue date:	01/31/1991
From:	Leitch G, Meck K; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	NUDOCS 9102190148
	Download: ML20066G481 (12)
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W' PHILADELPHI A ELECTRIC COM PANY 3917022950 LIMERICK OENER ATING ST ATION P. C. DOX A -

SAN ATOG A. PCNNSYLV ANI A 19464

.-(215) 3171200. EXT. 3000 enawau . . . . .u.

. .u..iven-February 11, 1991 ;

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50-353 License Nos. NPF-39 NPF-85 l U. S. Nuclear Regulatory Commission i Attnsi Document. Control Desk Washington, DC- 20555

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Subjectt Limerick Generating Station' Monthly Operating Report For Units 1.and 2 Enclosed are the monthly operating reports'for Limerick Units

-1 : and 2 -. for - the month of January, 1991 forwarded - pursuant _to ~ j Technical;; Specification-6.9.1.6.

Very truly yours, 71/WM -;

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^KWM/dms' Enclosure-4 cc: T.: T. Martin,' Administrator, Region I', USNRC T. J. Kenny, USNRC Senior Resident Inspector L-i . l 9102190148 910131 PDR R

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Docket No. #50 352 Attachment to Monthly Operating Report for January 1991 LIMERICK GENERATING STATION UNIT 1 JANUARY 1 THROUGH JANUARY 31,1991

1. NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES Limerick Unit 1 began the month of January at 100% of rated thermal power. Early on January 1, reactor power was reduced to 85% for approximately 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months in order to facilitate the proccating of condensate filter domineralizers. On January 3 reactor power was reduced to 84% to perform main turbine contrca valve, stop valve testing and a control rod pattom adjustment. A leaking O.

ring on an electro-hydraulle control (EHC) fluid pump was also repalrod at this time and work was completed on the condtreate filter domineralizers with a retum to 100% on January 4. On January 8, a loss of secondary containment integrity required operators to decrease reactor power to 65%.

During increase in power on January 8, following rostoration of secondary containment, an EHC fluid leak was discovered at an EHC pressure test connection. The main turbine-generator was taken off-lino shortly thereafter. The leak was repaired and the turbino-generator was synchronized to the grid approximately four hours after being taken off-line,100% power was achieved on January 10.

On January 12, reactor power was reduced briefly to 80% to perform a control rod pattom adjustment. On January 19, reactor power was reduced briefly to 86% for main turbino control valve and stop valvo testing. On January 22, an electrical fault resulted in a 75% recirculation pump runback and a reactor power decrease to 75% On January 23, following recovery from the electrical fault a reactor feed pump controller failure resulted in a recirculation pump runback on low reactor vessel level and reactor power was decreased to 75%,100% power was achieved oo January 26.

On January 28 roactor power was briefly reduced to 98% to perform a control rod exercise test.

Limerick Unit 1 orded the month of January at a nominal 100% of rated thermal power.

Operational events that occurred during the month of January included:

On January 7 while attempting to restart normal Reactor Enclosure (RE) HVAC following testing, the '1 A' RE supply fan failed to trip automatically when all the exhaust fans trippod.

The fan breaker was manually tripped. The HVAC transient resulted in a positive RE differential pressuro and oponing of a blowout panol. On January 8, a Unit 1 reactor shutdown was commenced to comply w:th the Secondary Containment Technica!

Specification snutdown action statement. A 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months NRC notification was made to report commencement of a shutdown required by Technical Specifications. The Unit 1 reactor shutdown was terminated at 65% power following repairs to the blowout panel.

On January 22, a fault on the #135 circuit breaker in the 500 kV yard resulted in a voltage transient on the 201 safeguard bus. The condensato reject valve failed open on a loss of power causing a reactor level transient and reactor recirculation pump runback. The plant was stabilized at 75% power. Power was restored to 100% on January 23.

1

- On January 23, tho *1A' reactor food pump controller output signal drifted down to approximately 20% demand. The resulting reactor vessel level transient caused a reactor recirculation runback signal. The Reactor Operator Immodlately took manual control of the

'1 A" reactor food pump ct ntroller. The plant was stabilized at 75% power. Power was restored to 100% on January 26. The feed pump control problem was traced to a failed card which was subsequently replaced.

II. Qhallenoes to Malo Steam Safety Relief Valves There were no challengos to the Main Steam Relief Valves during the month of January.

AVERCCE DdILU UNIT.POWEQ LEVEL' -d}'

DOCKET NO. 50 - 332 - -.

.. UNIT LIMERICK UNIT 1 Jt91-7 022950

-DATE FEBROARY 4, 1997 -.

.. -- =.. ...--- .....-- .

COMPANY PHILADELPHIA ELECTRIC COMPANY MARL WECK REPORTS SUPERVISOR BUSINESS UNIT

'LIVERICK GENERATING' STATION TELEPHONE (215) 327-1200 EXTENSION 3320 MONTH JANUARY 1991 DAY AVERAGE DAILV POWER LEVEL DAV AVERAGE DAILY POWER LEVEL (MwE-NET) (MwE-NET) 1 992 17 1044 2 1C45 18 1049 3 890 19 1041 l

l 4 102F 2C 1045 l

5 1046 21 1047 6 1045 22 956' I

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'OPEXATING' DATA'CEPORT (CONTINUED) DOCXET NO '50 - 352' '* V DATE FEBRUARY 4.~1991 .

,m MENT- - + DATE CuMuLATIvs 3917022950.

19.-UNIT SERVICE FACTOR 99.E. 99.E 75.0

20. UNIT.. AVAILABILITY FACTOR 99.5 99.5 75.6

21. UNIT. CAPACITY FACTOR (USING MDC NET)' 93.5 93.5 65.8

22. UNIT CAPACITV FACTOR'(USING DER NET) 93.5 93.5 65.0

23. UNIT' FORCED OUTAGE RATE 0.5 0.5 3.5-24.' SHUTDOWNS' SCHEDULED OVEP NEXT 6. MONTH 5 (TVPE. DATE. AND DURATION 08 EACH}:

25. IF SHUTDOWN AT END OF REPORT PERIOD. ESTIMATED DATE OF STARTUp:

26. UNITS IN TEST STATUS (PRIOR TO COMMERCIAL OPERATION)- FORECAST ACHIEVED INITIAL CRITICALITY 12/19/84 12/22/84 INITIAL ELECTRICITV MID APRIL 85 4/13/e5 COvvERCInt nPEmsTION' it!'OTE 6f 27P'rAE r A r.E : 0:

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U EU UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50 - 352

UNIT NAME LIMERICK. UNIT 1 -

"' '5"M"a '"!.__....______ 3 917 0 2 295 0 REPORT MONTH JANUARV, 1991 COYDLETED By PHILADELPHIA ELECTRIC COMPANY .

KARL MECW REPOP.TS SUPERVISOR 50SINESS UNIT LIMERICK GENERATING STATION TELEPHONE (215) 327-1200 EXTENSION 3320

i i ! I METHOD OF ' LICENSEE ISYSTEM COMPONENT) CAUSE AND CORRECTIVE I iTVPElDURATIONlREASONl SHUTTING OOWN! EVENT l CODE CODE I ACTION TO NO.} DATE l (1)I (HOURS){ (2) l PEACTOR (3) ! REPORT s j (4)' (5) l PREVENT RECURRENCE

! I i ! l 1 i !

T l 910122 i F l 000.0 ! A 4 1 N/A i EA l ELECON i LOAD WAS REDUCED 25% DUE TO A SOOKV l ! ! l ! i l BREAKER FAILURE COINCIDENT WITH REACTOR I l } FEED PUMP CONTROL PROBLEMS.

! . I B 910123 F 000.0 A 4 N/A CH INSTRU LOAD WAS REDUCED 25% DUE TO A REACTOR l . FEED PUwD CONTROL PROBLEu.

.. __ j j l

i , 4.0 I -! ! !

<1* i:: (3) (4)

E - FORCED RFASON M E T-C D E W B:7 G - IN ST R UC T I D+G 1 - IC-EDULED A - EQUIPwENT PAILUGE (E*DLAIN) - MANUA. 50L PRFPARATION OF DAli B - MAINTENANCE OD TEST 2 - MANUAL SCRAv. ENTE

S-EETS FOR LICENSEE C - REFUELING ? - AUTOwATIC SCRAM. EVENT REPORT (LER6 0 - REGULATORv RESTRICTION 4 - OTHER (EXPLAIN) FILE (NUREG-0161)

E - OPERATC9 TRAINING + LICENSE EXAMINATION r - ADw!NISTRAT!vE (5)

G - OPERATIONAL ERROR (EXPLAIN) w - OTHER(EXPLAIN) EPHIBIT I - SAME SOURCE

~ - .. . ~ . . .. --

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3917022950:

A Docket Noi #50-353 Attachment to MontNy -

Operating Raport for Januaiy1991 a LIMERICK GENERATING STATION UNIT 2 - '

JANUARY 1 THROUGH JANUARY 31,1991 i

. ll NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES

~

- Limerick Unit 2 began the month of January at 100% of rated thermal power. Reactor power.was briefly reduced by less than 15% to perform control rod pattem adjustments on January 4,11, and ms 18 respectively, On January 25, reactor power was reduced to 90% to perform a Main Turbine >

Control Valve test. On January 30, the turbine-generator was taken off-line due to an EHC fluid leak.

: discovered at the #2 main turbine control valve servo with reactor power maintained at 17%

-t , ,

y, 1

Repairs were completed : approximately nine . hours - later and the ; main ' turbine generator - '

rosynchronized to the grid at 1410 hours0.0163 days 0.392 hours 0.00233 weeks 5.36505e-4 months on January 30.1 Early on January 31,100% power was

+

achieved and the unit ended the month at a nominal 100% or rated thermal power.

g' '

ll. CHAl i FNGES TO MAIN STEAM SAFETY RELIEF VALVES t

LThere were no challenges to the Main Steam Safety Relief Valves dur'ng January.

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OPE ATING DATA TEPORT " **
DOCKET NO. 50 - 333 DATE FEBRUARY 4.1991
'-, J/,.y922950.
COMPT.ETED BY PHILADELPHIA ELECTRIC COMPANY
. = - - _ .._______ ._._.
'KARL'MECF REPORTS SUPERVISOR
. BUSINESS UNIT _
LIMERICK GENERATING STATION EXTENSION 3320 TELEPHONE'_(215) _____. _ 327-1200...___.____.__.._
OPERATING STATUS
~~1. UNIT NAME: LIMERICK UNIT.2 l NOTES: MAIN TURBINE-GENERATOR i~~
~~2. REPORTING PERIOD: JANUARY. 1991 'wAS TRIPPED DUE TO AN EHC 3 LICENSED THERMAL' POWER (MWT): _~~
3293 '
PIPING LEAE.
4 NAMEPLATE RATING (GROSS MWE): 1138
~~5. DESIGN ELECTRICAL RATING (NET MWE): 1055~~
~~6. MAXIMUM'OEPENDABLE CAPACITY (GRO15 MwE): 1092~~
? MAXIMUM DEPENDABLE CAP *CITV (NET MvE): 1055 l E. Ir CHANGES OCCUP IN CAPACITV RATINGS (ITEMS NUMBER 3 THROUGH 7) SINCE LAST DEPORT. GIVE REASONS:
~~9. POWER LEVEL TO WHICH RESTRICTED. IF ANV (NET WWE):~~
~~10. REASONS FOR RESTRICTIONS. I F. ANY:~~
THIS MONTH VR-TO-DATE CUMULATIVE 11 HOURS IN REPORTING PERIOD 744 744 P.336
2. NUMBER Or HOURS REACTOR WAS CRITICAL 744.0 744.0 B.303.3 15 REACTOR RESERVE SHUTDOWN HOURS 0.0 0.0 0.0 14 HOURS GENERATOR ON-LINE 734.7 734.7 912.3
15. UNIT RESERVE SHUTDOWN HOURS 0.0 0.0 0.0 1E. GDOSS THERMAL ENERGV GENERATED (WWHJ 2.399.424 2.399.424 25.257.214 17 GROSS ELECTRICAL ENERGV GENERATED (vwu) 793.470 793.470 s.?
~~..___..____. _____.___-__ .._____'s.4en .__._~~
~~18. NET ELECTRICAL ENERGY GENERATED ( PVN) 767,9@A 767,994 8, cot;,560~~
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