ML20084E930

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Ro:On 720321,diesel Pump 1-2 Failed to Start During Surveillance Test.Caused by Bad Cell Batteries.Batteries Replaced
ML20084E930
Person / Time
Site: Oyster Creek
Issue date: 04/07/1972
From: Finfrock I
JERSEY CENTRAL POWER & LIGHT CO.
To: Morris P
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 8304180674
Download: ML20084E930 (1)


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Jersey Central Power & Light Company M ADISoN AVENUE AT PUNCH BOWL RO AD e MoRRISToWN. N. J. 07960 e 539-611 I April 7, 1972 b, .

-9 Dr. Peter A. Morris, Director >

dpg2 Division of Reactor Licensing United States Atomic Energy Commission

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  • 8g [A N l Wshington, D. C. 20545 JN 4 w}\ . wg

Dear Dr. Morris:

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Subject:

Oyster Creek Station Docket No. 50-219 Diesel Fire Pump Starting Failure The purpose of this letter is to report to you the failure of Diesel Fire Pump 1-2 to start during a surveillance test on l

March 21, 1972. &

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m This surveillance test consists of starting each pump from t the control room and again by lovering the fire pump discharge header . u, pressure. The pump started on the signal from the control room but /

did not start on the drop in header pressure. The operator in attendance observed that the diesel cranked very slowly. Each fire

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pump is started by a starting motor driven electrically by a 24-volt DC battery. Each pump is equipped with two, 24-volt DC batteries either of which may be used for starting. Each battery is composed of two heavy-duty 12-volt batteries connected in series. The Shift Foreman on duty went to the fire pump location and by selecting the alternate battery for 1-2 pump, started the diesel although it cranked very slouly, it was determined later that each of the batteries serving the failed pump has one bad cell. The 12-volt batteries which had the baTcell were replaced with new batteries.

In the future, closer attention will be given to possible l

battery deterioration.

I Il 7 We are enclosing twenty-five copies of this report.

AN f Very truly yours,

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Enclosures [

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cc: Mr. J . P. O'Reilly, Direc tor Division of Compliance, Region I bO COPY SENT REGION / A,

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