ML19256G533

LER 79-037/03L-0:on 791113,diesel Generator 1 Failed to Start.Caused by Silencer Bypass Solenoid Stopping in mid- Position Due to Insufficient Air Supply.Valve Opened & Air Supply Capped.Sys Will Be Modified

ML19256G533
Person / Time
Site:	Cooper
Issue date:	12/12/1979
From:	Phillips D NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19256G532	List: ML19256G531 ML19256G533
References
LER-79-037-03L, LER-79-37-3L, NUDOCS 7912310440
Download: ML19256G533 (1)

Text

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EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h O ,, fhile performing S.P. 6.3.12.1 to prove operability of #1 diesel generator (Tech.

, 3 IS pec. 3.5.F.1), #1 DG failed to start. No. 2 DC was incoerative. (Def. TFR 70-16) l o 4 All low pressure core cooline systems were onevnble- hacenr mua r "w 4 -a d i e t e ly I o ., geduced per Tech. Specs. Since normal and all offsite power was available, and this I a i ,3 pG could have been manually started,there were no adverse affects to Dublic health 1

-I and safety. This event is repetitive (LER 78-39).

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36 J '. 40 el 42 43 44 47 CAUSE DESCRePTION AND CORRECTIVE ACTIONS h o 'fhe failure to start was caused by the silencer bvoass solenoid stoncine in the mid I ij position due to insufficient air supply. Until the design of this system can be re- I

, l viewed and modified, the silencer bypass valve was opened and the air supolv to the

, l solenoid valve was canned on both diesel engines. The acolicable -odel nn-hers are- 1 i 4 fngine (Cooper Bessemer KSV-16-T); Valve (ASCO 8344A72). I 7 4 i 80 ST , .. POWE R OTHE R ST A TUS ISCO RY DISCOV ERY DESCRtPTION i L e i lE l@ to 018 12 lh 12 11 NA 44 l b l@l 45 46 Surveillance Testine 80 l

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LLL;j[N_j@l NA l ll ll1llIll lIlI a 's to 68 69 80 1 N AVE OF PREPARER David L. Phillins Psays. 402-825-3811 2,