ML20050B370

LER 82-009/03L-0:on 820309,125-volt Dc Low Voltage Alarm Bus 4 Indicated No Battery Charger Output.Caused by Blown Fuse. Fuse Replaced & Charger Returned to Svc

ML20050B370
Person / Time
Site:	Beaver Valley
Issue date:	03/24/1982
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20050B369	List: ML20050B368 ML20050B370
References
LER-82-009-03L, LER-82-9-3L, NUDOCS 8204050261
Download: ML20050B370 (2)

Text

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' 4 60 til GOCK ET NVYBEM EVENT DESCHIPTION AND PAOBABLE CONSEQUENCES h l O 12 l l On 3/9/82 at 0329 hours0.00381 days <br />0.0914 hours <br />5.439815e-4 weeks <br />1.251845e-4 months <br />, a 125 VDC nus No. 4 Low Voltage alarm was received. l

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o 3 l With no battery charger output current observed, the charger was declared l go gdl l inoperable after checking it for proper alignncht to the hun (Tech. Spec. 3.8.2.4). f o 5 l Th'ere were no safety implications since the plant was shutdown and the No. 4 DC l 1

o s l Bus siipplied non-safety related DC loads and backup power to the No. 4 120 VAC l o 7 l Vital Bus Inverter. . AC power renained available to the inverter. I l

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43 44 47 35 3e 40 CAUSE DESCHIPTION AND CORHECTIVE ACTIONS g,go;j The battery charger failure was due to a blown fuse. The fuse was replaced and l

, l the charger returned to service. The low voltage alarm on 125 VDC Bus No. 4 l

, 7 l icas cleared at 0534 hours0.00618 days <br />0.148 hours <br />8.829365e-4 weeks <br />2.03187e-4 months <br />.  ;

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