ML19344D995

LER 80-040/03L-0:on 800724,standby Gas Treatment Sys Found Inoperable.Caused by Breaker Being Unintentionally Moved to Open Position,Possibly During Daily Operator Tour.Breaker Returned to Normal.Operational Check Satisfactory

ML19344D995
Person / Time
Site:	Pilgrim
Issue date:	08/21/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19344D991	List: ML19344D990 ML19344D995
References
LER-80-040-03L, LER-80-40-3L, NUDOCS 8008260500
Download: ML19344D995 (1)

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NRC FORM 366 U.S. NUCLEAR REGULATCRY COMMISSION (7 77)

LICENSEE EVENT REPORT

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REPORT CATE 7 8 61 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h g l Contrary to Technical Spr.cification 3.7.B.1.a the Standby Cas Treatment System (SGTS) l l0l3l l was found inoperable at approximately 0855 hours0.0099 days <br />0.238 hours <br />0.00141 weeks <br />3.253275e-4 months <br /> on July 24, 1980. During the par- 1 IO I4 l l formance of the daily operator tour the SGTS exhaust fan VEX 210A 480 volt breaker l l0Isl l B1526 was found in the "0FF" position. The breaker was immediately returned to l F5 Tii1 I normal, an operational check of the fan satisfactorily performed, and the ' A' train l l 0 l 7 l l returned to a normal status. l 10181 l l 7 8 g 80 E CODE $ 8CO E COMPONENT CODE SUB dE SU E FOR I S l C l@ [xj@ lz l@ l z l zl z l z l z l z IO LzJ@ LzJ @ 20 7 8 9 10 11 12 13 18 19

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33 35 3/ 40 42 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Iil0ll The cleanup of Reactor Building Auxiliary Bay in the area of the 'B15' 480 Volt Motori

< gl Control Center was'in progress. During this activity it is believed that the I

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,,,7i l breaker was uninten.*ionally moved to the open position. This is an isolated event. I u.Lu I - I l

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0 0"~ Mr. M. Thomas McLoughlin i 7 8 9 to 617-746-7900 o