05000313/LER-1980-038-03, /03L-0:on 801013,during Monthly Surveillance Testing of Number One Diesel Generator,Voltage Regulator Failed to Respond to Higher or Lower Signal.Caused by Internal Mechanical Wear.Regulator Replaced

/03L-0:on 801013,during Monthly Surveillance Testing of Number One Diesel Generator,Voltage Regulator Failed to Respond to Higher or Lower Signal.Caused by Internal Mechanical Wear.Regulator Replaced

ML19339C608
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/11/1980
From:	Bramlett L ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19339C605	List: 05000313/LER-1980-038, Forwards LER 80-038/03L-0 05000313/LER-1980-038-03, /03L-0:on 801013,during Monthly Surveillance Testing of Number One Diesel Generator,Voltage Regulator Failed to Respond to Higher or Lower Signal.Caused by Internal Mechanical Wear.Regulator Replaced
References
LER-80-038-03L-01, LER-80-38-3L-1, NUDOCS 8011180676
Download: ML19339C608 (1)

LER-1980-038, /03L-0:on 801013,during Monthly Surveillance Testing of Number One Diesel Generator,Voltage Regulator Failed to Respond to Higher or Lower Signal.Caused by Internal Mechanical Wear.Regulator Replaced

Event date:
Report date:
3131980038R03 - NRC Website

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N RC f ORM 3(4 U. 5 NUCL E AR REGUL ATORY COMMiti.10N (7 fil LICENSEE EVENT REPORT EXHIBIT A h

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(PLE ASE PRINT OR TYPE ALL RfoutRED 4NFORMATIONI CONTROL BLOCS 0 '

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RE,OR f D AT E A43 EVENT DESCRIPTION AND PROaABLE CONstOutNCES h l

1 During the mnnthly surveillance testing nf the numhar nno diesel generatnd o 2 I.

1 o 12 i 1 the voltage regulator for this unit failed to resp.ond to_ a hi.gher or lowen f

[TTT1 I signal. The imediate actions were to test and prove operability of the i F6TO I number two diesel aenerator per T.S. 3.7.2.c.

The redundant system was I

o s I available oer imediate actions.

There haye_been no similar occurrences.1 iReportable oer T.S. 6.12.3.2.b.

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FTTTl 1The cause of the failure to respond to voltage control was determined to i 4

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Investigation indicated the failure i frTT1 I of the regulator to be internal mechanical wear and is considered as an l isolated failure.

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