ML20076E264

Special Rept 91-08:on 910717,coolant Found Leaking from Cap on Heat Exchanger of Engine of Fire Diesel Pump 1-1.Caused by Wearing on HX Neck,Resulting in HX Failing to Hold Normal Pressure.Engine Secured & Work Request Initiated

ML20076E264
Person / Time
Site:	Oyster Creek
Issue date:	08/13/1991
From:	J. J. Barton GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
91-08, 91-8, C321-91-2216, NUDOCS 9108190185
Download: ML20076E264 (2)

Text

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s GPU Nuclear Corporation b,. .. "; Nuclear  :'a't::r-Forked Rher. New Jersey 08731-0388 009 971 4000 Writer's Direct D-al Numter August 13. 1991 C321-91 2216 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Special Report No. 91 08 Enclosed is Special Report No. 91-08 which is submitted in accordance with technical specification 3.12.B.

If there are any questions, please contact Mr. Michael Heller, OC Licensing Engineer at (009)971-4680.

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k4 John J. I rton Vice President and Directo.r Oyster Creek JJB\MH:Jc Enclosure cc: Administrator, Region 1 (All w/ enclosure)

Senior NRC Resident inspector Oyster Creek NRC Prcject Manager

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RenarLQ1111 August 13, 1991 Oscurrence Date July 17, 1991 Identification of Occurrence:

-Non functional fire diesel pump 1-1 was not restored to functional status within seven (7) days as required by technical specification 3.12.8.

Description of Occurrent.el During a post maintenance test run of the 11 fire diesel, coolant was found leaking from the cap on the heat exchanger of the engine. 1he heat exchanger neck was found to be worn, which would not allow a tight fit of the coolant cap and the heat exchanger was rot able to hold its normal pressure and fluid level.

Analysis of Occurrencer Upon discovery of this coolant ' leak, the 1 1 fire diesel engine was secured and a work request was submitted for repairs. The plant maintenance department determined that a new fill neck and coolant cap were necessary. These parts were ordered from the manufacturer. During this time period, the 1-2 fire pump and the redundant fire pump were available, thus the safety significance of this event was minimal.

Corrective Action:

The required parts were received and the necessary repairs were made on July 27, 1991. Af ter repait s were completed, a fire-pump operability surveillance was performed and the 1-1 fire pump was returned to service on July 27,1991 at 1850 Tours.

(Helter C3212216)

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