05000313/LER-1979-016-03, /03L-0:on 790827,diesel Generator 2 Tripped on Low Oil Pressure,Rendering Generator Inoperable.Caused by Leak Allowing Water to Enter Oil Sys,Causing High Crankcase Pressure.Oil Cooler Replaced

/03L-0:on 790827,diesel Generator 2 Tripped on Low Oil Pressure,Rendering Generator Inoperable.Caused by Leak Allowing Water to Enter Oil Sys,Causing High Crankcase Pressure.Oil Cooler Replaced

ML19208D479
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/14/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19208D467	List: 05000313/LER-1979-015-99, /99X-0:on 790817,as Result of Analysis of Seismic Category I Pipe supports,37 Restraints Were Identified to Have Safety Factor of Less than Two.Supports Modified 05000313/LER-1979-016-03, /03L-0:on 790827,diesel Generator 2 Tripped on Low Oil Pressure,Rendering Generator Inoperable.Caused by Leak Allowing Water to Enter Oil Sys,Causing High Crankcase Pressure.Oil Cooler Replaced ML19208D466
References
LER-79-016-03L-01, LER-79-16-3L-1, NUDOCS 7909280471
Download: ML19208D479 (1)

LER-1979-016, /03L-0:on 790827,diesel Generator 2 Tripped on Low Oil Pressure,Rendering Generator Inoperable.Caused by Leak Allowing Water to Enter Oil Sys,Causing High Crankcase Pressure.Oil Cooler Replaced

Event date:
Report date:
3131979016R03 - NRC Website

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S 40 Gl DOCKER,uuwetm 68 69 EvtNr o.rt 34 iS H,,oMT D.rt 80 EVENT DESCRtPTION ANQ PRQ8ABLE CONStoutNCES h ITTTI I During the monthly surveillance operational test, Diesel Generator #2 l

1 trinned on low oil pressure after approximate 1v three minutes of I

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Diesel Generator #1 was demonstrated operable immediatelv i

m i per surveillance procedure 1104.36 Sunclement I.

Unit power operation i

F5Tirl was continued based on meetine the reouirements of T.S.3.7.1c, LER50-313/I o

i I 75-009 involved the lube oil cooler, but was not similar in nature.

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CAUSE DESCA pTION AND COARECMVE ACTIONS h The diesel lube oil cooler was leaking allowing water to enter the oil i

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m system.

The water vanori ed on unit oneration causine a hich crankcase i

m ipressure< which ultimatelv caused the oil switches to trip the engine.

I l The oil cooler was replaced and-the diesel generator successfully tested i 3

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