05000334/LER-1980-016-03, /03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered

/03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered

ML19309B945
Person / Time
Site:	Beaver Valley
Issue date:	03/31/1980
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19309B921	List: 05000334/LER-1980-012-01, /01T-0:on 800312,emergency Shutdown Panel Auxiliary Feedwater Flow Instrumentation Readings Were Deleted from Surveillance Testing.Caused by Meter Reading Zero in Standby 05000334/LER-1980-016-03, /03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered ML19309B920
References
LER-80-016-03L, LER-80-16-3L, NUDOCS 8004070375
Download: ML19309B945 (1)

LER-1980-016, /03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered

Event date:
Report date:
3341980016R03 - NRC Website

text

-. _ _ _. _ _ _ _ -. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

U. S. NUCLE AR HEGUL ATORY COMMISSION P.RC FO;;M 366 (1 119 LICENSEE EVENT REPORT l

CONTROL 8 LOCK: l 1

l l

1 I

lh (PLE ASE PRINT OR TYPE ALL REQUIREO INFORMATION)

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E%ENT OATE 14 TS RE' ORT D ATE 60 EVENT OESCRIPTION AND PROSA8LE CONSEcuENCES h

og,j lWhile testing the 1/2 Battery Charger, the AC input breaker tripped. The charger hadj been loaded for approxiinately 7 minutes in accordance with the load test.

The g

goi,,g l breaker was reset and the charger returned to service. No further problems were l

io l4 l 1nisitexperienced with the breaker. Loose control wiring was found and is being i

iO is l )investicated. The No. 2 Battery Charger was not needed for Operational Mode 5.

l l 0 l 71 l Associated batteries //1 and 3 were in service to support " Train A Priority".

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80 SYSTEM

CAUSE

CauS E COMP VALVE CODE CODE SUSCODE COYPONENT CODE SUSCODE SUSCODE ITTil I r.1 c l@ Lx_l@ l z i@ I z l z l z l 21 zl zl@ l z l@ l zi @

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9 10 11 12 13 is 19 20 SEOVENTI AL OCCURRENCE REPORT R EV15lON LER RO EVENT YE AR REPORT NO.

CODE TYPE N O.

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33 J4 33 26 31 40 41 42 43 44 47 CAUSE CESCRIPTION ANO CORRECTIVE ACTIONS h l i l 0 l l Loose control wirine has been diacnosed as the cause of the breaker trip.

After l

liii1l completion of the surveillance test, all wiring was checked and the loose wire was I

liirilre-soldered. The surveillance test was reperformed satisfactorily.

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% POWE R OTHER STA TUS iSCO RV OtSCOVERY DESCRIPTION Q l 11l@ l 0 l 0 l 0 l@l N/A l

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ACTtveTV CONTENT afLEASE craELEASE AMOUNT OF ACTtvtiv LOCATION OF RELE ASE Lus_] LEJ @O LzJ@l N/A I

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