ML20042A650

Updated LER 81-033/01X-1:on 810602,while Blowing Down HPCI Steam Supply Line W/Hpci Turbine on Turning Gear,Auxiliary Oil Pump Tripped & Motor Was Burned.Caused by Loose Stator Winding.Motor Rewound

ML20042A650
Person / Time
Site:	Dresden
Issue date:	02/25/1982
From:	Zirwas K COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042A644	List: ML20042A643 ML20042A650
References
LER-81-033-01X, LER-81-33-1X, NUDOCS 8203230650
Download: ML20042A650 (2)

Text

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LICENSEE EVENT REPORT Update Report - Previous Report Date,

• 6-9-81

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ORT oATE EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h lol2l l While blowing down HPCI steam supply line with HPCI turbine on the turning gear, the I g ; auxiliary oil pump tripped and the motor was found to be burned. HPCI was declared  ;

,g,,,  ; inoperable and the required surveillances were begun. This event was of minimal safety ;

significance since all remaining ECCS systems were available. There was no effect on

,g public health or safety. This was the first occurrence of this type. ,

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,, ,,,gits slot. This allowed the winding to rub on the rotor causing failure of its insulation,;

arcing and motor failure. The motor was rewound and tested satisfactorily. The motor  ;

! , , gwill continue to be checked during normal surveillance testing.  ;

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STA UNIT. YEAR NO.

D - 12 - 2 - 81 . 55 PART I iTITLE OF EVElT OCCURRE HPCI Aux 011 Pump Failure 81 0245 REAS0:1 FOR SUPPLEttEliTAL REPORT Update cause of failure 4

PART 2 l ACCEPTANCE BY STATIO!! REVIEV ShwM Mb DATE 3l3- f2-

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SUPPLEftENTAL REPORT APPROVED /.

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NID AUTHORIZED FOR DISTRIBUTI0tt

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