05000293/LER-1980-040-03, /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

/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: 05000293/LER-1980-040, Forwards LER 80-040/03L-0 05000293/LER-1980-040-03, /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
References
LER-80-040-03L, LER-80-40-3L, NUDOCS 8008260500
Download: ML19344D995 (1)

LER-1980-040, /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

Event date:
Report date:
2931980040R03 - NRC Website

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

LICENSEE EVENT REPORT h CONTROL BLOCX:

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60 61 DOCK ET NUMBER 68 69 EVENT DATE 74 75 REPORT CATE 80 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.

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40 41 42 43 44 47 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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