ML19347E009

LER 81-030/03L-0:on 810309,diesel Generator 2 Would Not Restart After Being Brought to Speed & Tripping,Apparently Due to Overspeed.Caused by Failed Taper Pin & Bent Level in Governor of Diesel.Turbocharger,Taper Pin & Level Replaced

ML19347E009
Person / Time
Site:	Beaver Valley
Issue date:	04/06/1981
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19347E008	List: ML19347E007 ML19347E009
References
LER-81-030-03L, LER-81-30-3L, NUDOCS 8104140612
Download: ML19347E009 (2)

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i e so si c,ocast .i.vsa. d as s . s .r :a ra 75 ae* care ^rt EV E'.T DESCRIPTiCN AP40 PaoS ASLE CONSECLENtE3 h i:1:tlWith the plant in Mode 5. Priority Train "B", and making preparations for startup, l iTTT1 I a monthly surveillance test was performed on the No. 2 diesel generator. The diesell I,i4!lvas brought to speed and tripped, separently due to overspeed. The diesel would notl l 1 +: Ire-start and was declared inocerable at 1103 hours0.0128 days <br />0.306 hours <br />0.00182 weeks <br />4.196915e-4 months <br />. There were no safety I i 41li-nlications to the public since the radunhnt dfewel was onorable and oniv one l l !dicact mnarator is recuired to be onornSlc in Mode 3. I i.84; I I l 60 7 8 3 sysrtu cause cA .se cove vatvs cc:a ccos s:.s:ces c:vacsssrecoa swaccce surcoce I ,il I cl cl@ LEj@ l Bl@ l MI El Cl Fl Cl 'l@ l Zi@ l Zl@ .J '

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ii-l lThe diesel failure was attributed to a failed taner nin and bent lever in the I l'i 1lenvernor of the diesel. The diesel turbocharter also f ailed. The turbocharcer I l

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o Attachment To LER 81-30/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 CM Electromotive Division has proposed a modification to the Diesel Generator turbocharger. This modification consists of a stiffener on the turbocharger frame that will decrease the turbocharger's susceptibility to vibrational failure.

Beaver Valley Power Station is going to investigate these modifications as a method to increase the reliability of the diesel engines. ,

No correlation was drawn between the failures of the governor and turbocharger.

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