ML20028C749

LER 82-048/03L-0:on 821210,power Lost to 120-volt Ac Vital Bus VIAC-3.Caused by Worker Accidentally Bumping Static Switch,Resulting in Supply Being Switched from Alternate to Normal.Switch Covers Installed

ML20028C749
Person / Time
Site:	Millstone
Issue date:	01/05/1983
From:	Komosky G NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028C742	List: ML20028C741 ML20028C749
References
LER-82-048-03L, LER-82-48-3L, NUDOCS 8301140063
Download: ML20028C749 (1)

Text

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LICENSEE EVENT REPORT -

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S 60 81 coCKET NUMBER 88 50 EVENT oATE 74 75 REPORT oATE 80 .

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 121 l During routine steady state power operation, power was lost to the 120 volt A.C. Vital l

[3-l n l Bus #VIAC-3. The plant was operated in accordance with Technical Specification State- 1 o 4 l ment 3.8.2.1 for fifty minutes. Similar LERS: None l

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 li lo l l With VIAC-3 being powered by the alternate supply and the normal supply tagged out for I ii l maintenance, a worker accidently bumped the static switch causing the supply to be l

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