ML18037A280

Forwards Monthly Operating Rept for Jul 1980

ML18037A280
Person / Time
Site:	Nine Mile Point
Issue date:	08/07/1980
From:	Lempges T NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF MANAGEMENT AND PROGRAM ANALYSIS (MPA)
Shared Package
ML17053B852	List: ML17053B851 ML18037A280
References
NMP-2452, NUDOCS 8008180404
Download: ML18037A280 (10)

Text

NMP-2452 7 Mlle%,IRA, Q QQog+5fK NINE MILE POINT NUCLEAR STATION/P.O. BOX 32 LYCOMING,NEW YORK 13093/TELEPHONE (315) 343-2110 August 7, 1980

'O~ecLo/L, O)g.ce o) Management In)o/Im~n and Prolog/Iam Coetnol United S~m Nuclea/L Regulato/I.y CommQaaon Olu kingkon,

'O.C.

20555 RE:

Voce& No.

50-220 VPR-63 6~em en:

Sub~ed hen~hLs Che RepoM o( Oping S~Wce and S~oI0n Expe/u.ence (oh. July,

1980, (oh. Che hLine NXe Pox& Nucleah. S~n U~

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AQo ~ctudedL s a, Maturative RepoM o( Oping Expetu.ence (o/L Che month.

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NIAG i OHAWK POWER CORPORATION NINE MILE POINT NUCLEAR STATION UNIT

$/1 NARRATIVE OF OPERATING EXPERIENCE JULY 1980 The station operated with a monthly availability factor'f 51.'2% and a net design electrical capacity factor of 43.0%.

During the entire month //15 Reactor Recirculation Pump was out of service and isolated due to mechanical problems.

Availability/capacity factor losses were due to the following:

On July 12 the unit was removed from service when results of the main trans-former oil analysis indicated an excessive amount of dissolved gases in the oil.

During the ensuing two (2) week outage, exhaustive testing was performed which revealed a problem in the ground shield of Phase 3.

This situation was corrected by isolating the ground'hield.

The transformer was then determined, through further testing, to be acceptable for service.

During the same two'eek outage,- the manual and automatic scrams required by NRC IE Bulletin 80-17 were performed;" as well as other various maintenance items.

On July 26 start-up commenced, but the reactor scrammed on IRM high flux.

Subsequently, the unit was restarted and placed in service.

Capacity factor loss throughout the month was also due to condenser delta-T limitations and condenser'otwell temperature limitations.

CLASS I WORK ELECTRICAL MAINT. JULY 1980

//4170 Spent fuel pool replaced solenoid coil.

II4960 Reactor bldg. closed'loop cooling pump

//13 checked breaker, found no problem.

CLASS I WORK INSTRUMENT & CONTROL JULY 1980 if!4095 Inst. reg. to C.R.D.-F.C.V.

replaced diaphram.

/13576 L.P.R.M.36-33B detector shorted.

CLASS I WORK MAINTENANCE JULY 1980 83724

//12 shutdown cooling vent valves 374

& 326 replaced vent valves.

83785 Repaired restraint 51-H12-14.

II3789 Revised restraint 201-2-R40-14.

//3784 Revised restraint 44-SC-1-14.

II3723 /I12 shutdown cooling flow control valve replaced gasket

& packed valve.

84958 Changed CRD suction strainer.

/f3973 Changed II12 CRD filters.

$/4827 CRD 30-43 repaired foot valve.

//4831 F.W. flow control valve repaired crack in pipe.

fI4819 Emerg.

cond. vent isolation valve II0501 repacked.

84943 II121 electromatic relief valve replaced.

84953 CRD accumulator 42-35 replaced charging fitting.

/!4954 CRD accumulator 34-03 replaced charging fitting.

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UNITSHUTDOWNS AND POWER REDVCTIONS REPORT MONTH JULY 1980 DOCKETNO 50-220

~ ext. 1383 Nii.

Date rlc

~nTj0 Licensee Event Report +

Ew Q 0'o cn Cr C

EI p 0 C ~

0 Cr Cause h, Currectivc Action tu Prevent Recurrcncc 80-17

,07/12/80 351.7 A

Main Output Transformer Failure (High Explosive Gas Content) 80-18 07/26/80 F'l A

ERM High Fliix Scram (mechanical Pressure Regulator Failure)

F: Forced S: Scheduled Reason; A Equipment Failure (Explain)

B Maintenance or Test C Refueling D Regulatory Restriction L'.Operator Training h, Liccnsc Examination F.Administrative G Operational Error (Explain)

II.Other (Explain)

Method:

I -Manual 2-Manual Scram.

3-Automatic Scram.

4-Other (Explain)

Exhibit G - Instructions for Preparation ul'ata Entry Sheets for Licensee Event Report (LER) File INVREG-OI6I)

Exhibit I

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1 AVER AGE I)AII.YUNIT POtUEI( LEi'EL DOCy ET NO.

50-220 VNIT'-

DATE TELEPIIQNE (315) 343-2110 ext..1383 hIONTH DAY AVERAGE DAILYPO)UER LEVEL (hl'tUe-Net)

DAY AVERAGE DA!LYPOIUER LEVEL (hIWc-Net) 0 17 5

IS 19

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0 10 12 IS 16 0

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297 421 507 551 548 INSTRUCTIO. IS h

On this format. Itst tire averaec daily unit p>>ever level ht Mtt'c-Yct tor each day in tits'rcpot t>>r

~ r>>.>>trit. (:>>rttp>>tc to thc ncarcst ivhole meeaivat t.

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