ML19242A645

LER 79-019/03L-0 on 790627:at Completion of Surveillance Test,Output Breaker for 12U Emergency Diesel Generator Could Not Be Opened Remotely from Control Room.Caused by Loose Wire Connection in Trip Coil

ML19242A645
Person / Time
Site:	Millstone
Issue date:	07/27/1979
From:	NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19242A644	List: ML19242A643 ML19242A645
References
LER-79-019-03L, LER-79-19-3L, NUDOCS 7908030300
Download: ML19242A645 (1)

Text

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r vont niscmenon Aun enou^nu co at nuc ; cts @ l gg [ At the completion of a surveillance test per T.S. 4.8.1.1.2.a.2, the outnut_

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'y l Roon; the breaker was manually tripped from the local station at the switchae

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gg [T.S. 3.8.1.1 action statennt a, D/G IPU was declared inoperable and the rem The breaker is a G.E. Thgna-blast, lhdel AM-4.16- J g g ) [AC sources were verified operable.

glg [ 250-8 wi th a f'L-13 flechanism.

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with the trip coil of the brenter The _]

[ TIT) l A loose wire connection was found in seriet The _]

LLLU l termination was tightened and the breaker was functionally tested satisfactori J

The diesel was out of service l,;yj j enqine was started and its operability ver ified.

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IiliI ]approxinately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

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