ML19320D446

LER 80-014/03L-0:on 800608,while Performing ST 6.9,valve Mo 3-10-26B Failed to Close After Stroked Open.Caused by Mechanical Problem in Valve.Mo 3-10-26B to Be Disassembled & Repaired

ML19320D446
Person / Time
Site:	Peach Bottom
Issue date:	07/14/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
3-80-14-3L, LER-80-014-03L, LER-80-14-3L, NUDOCS 8007210378
Download: ML19320D446 (1)

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Mr. Boyca H. Gri:r, Director No. 3 1h/3L Offica cf. Inspection & Enforcement, Region I

~ U,$. Nuc14ar Regulttory Commission 631 Park Avenuo King of Prussia, PA' 19406

. Dear Mr. Griers This LER concerns the failure of the "B" RHR containment spray outboard isolation valve (M0-26B) to close during Surveillance Testing.

Governing Tech Spoo is 3 7.D.1.

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EVENT oEsGRIPTioN AND PRouAu cNE ENCEb

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lo I/I I While performina ST 6.9 (RHR "B" pump, valve, flow, and unit cooler functional) with the Unit at 100% power, valve MD 3-10-26B l Lo g I l

1n i4 I I failed to close after beine stroked seen. This valve is the "B" RHR containment spray and i

,M i outboaQiaolation valve for the I

17 50 i therefore is an inoterable isolation valve ner Tech Snee 1.7.D.1.

l lillB I The consecuences are minimal since the redundant isolation valve MO 3-10-31B is being maintained in the closed rosition.

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CAuSE DEsCitiPTSON ANDcoltHECTIVE AC14GN5 h Cause appears to be mechanical problem in the valve. Per Tech eo l in I

[7 TTl I h.7.D.2, m' $.3(inoperable isolation valve position daily log) was 1 begun to verify that NO 3-10-31B is maintained closed. NO 3-10-26B l yI g] will be disassembled and repa 1 during the next outage of l sufficient duration, and a follow-up report issued. I EI a e s S 'nPoWER OTieER ETATUS onsco R DESCoVERv DEsCR6PTIoM ST l [)_j h Surveillance Testing l

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