ML20005A314

LER 81-004/03L-0:on 810304,motor Driven Emergency Feedwater Pump 2B Was Declared Inoperable Due to Arcing in Motor.Cause Unknown.Motor Was Disassembled & Failure Found in Coil Slot

ML20005A314
Person / Time
Site:	Oconee
Issue date:	04/09/1981
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005A306	List: ML20005A305 ML20005A314
References
LER-81-004-03L, LER-81-4-3L, NUDOCS 8106300182
Download: ML20005A314 (1)

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oars avsur osscairnom Ano PacSASL3 coM84QuGMCa3 h M lOnMarch4 1981, the "2B" MDEWP was declared inocerable due to arcing in the I i

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l motor. Both the "2A" MDEWP and the TDEWP were operable during this incident,f I thus providing the necessary flow to prevent loss of steam generator feedwater.;

gl Hence, the health and safety of the public were not compromised by this in- t EME I eident. I o i I [

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i o l The exact cause for the failure is not known. Immediately after the motor g g i flashed, the breaker was tagged out and investigation began. The motor was ,

i I disassembled, and the f ailure was found in the coil slot. A spare motor wha g m I transferred to Oconee. Power reduction began after 60 hours6.944444e-4 days <br />0.0167 hours <br />9.920635e-5 weeks <br />2.283e-5 months <br /> limit expired. g s i #. i i The mornr was replaced, tested, and coupled to the pump. The unit began  ;

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