ML20085K119

Telecopy Ro:On 731214,while Conducting Routine post-maint Surveillance,Diesel Generator Cooling Water Pump Breaker Tripped.Investigation Underway

ML20085K119
Person / Time
Site:	Dresden
Issue date:	12/14/1973
From:	Worden W COMMONWEALTH EDISON CO.
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20085K115	List: ML20085K113 ML20085K117 ML20085K119
References
NUDOCS 8310200084
Download: ML20085K119 (1)

Text

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_ DIRECTOR DIRECTORITE OF LICENSING U S ATOMIC ENERGY COMMISSION WUX -

i WASHDC 20 545 SUBJEC T DPR-25 DRESDEN NUCLEAR POWER STATI ON UNI T 3.

THIS WILL CONFIRM A CONVERSATION WITH MR MAURA 0F YOUR OFFICE AT 1030 HOURS TKIS DATE CONCERNING A FAILURE OF THE UNIT 3 DIESEL ENERATOR COOLING WATER PUMP. ON DECEMBER 14, 1973 AT 0P05 HOURS 1+11LE CONDUCTING ROUTINE POS T-MAINTENANCE SURVEILLANCE OF THE UNIT 3 DIESEL GENERATOR THE 480 VOLT BREAKER FEEDING THE COOLING WATER PUMP TRIPPED CAUSING THE DIESEL GENERATOR TO TRIP ON HIGH TEMP ERA TURE.

ALL SYSTEMS REQUIRED TO 8E OPERA 6LE WHEN THE UNIT 3

_ DI ESEL IS OUT OF SERVICE WERE,IMMEDIATELY TESTED AND VEhlFIED TO BE O'ERAdLE. AN INVESTIGATION INTO THE CAUSE OF THE COOLING WATER PUMP FEED 8REAKER TRIP IS UNDERWAY AT THIS TIME. -

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