ML20082R655

RO 83-02:on 831119,fire Pump 1-2 Failed to Start on Low Sys Pressure During Demand for Fire Water to Fill Isolated Portion of Underground Fire Suppression Pool.Caused Suspected to Be Faulty Overspeed Trip Switch.Switch Tested

ML20082R655
Person / Time
Site:	Oyster Creek
Issue date:	11/21/1983
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-83-02, RO-83-2, NUDOCS 8312130251
Download: ML20082R655 (3)

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'1V : Dr. Thomas E. Murley Regional Administrator U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 From: GPU Nuclear Oyster Creek Nuclear Generating Station Docket No. 50-219 Forked River, IU 08731

Subject:

Special Report to the Commission

'Ibe following is a preliminary report submitted in compliance with the Technical Specifications, paragraph 3.12.B.3.b.

Report Date: November 21, 1983 Notification of the event described herein was made to Mr. C. Cowgill of the NRC Resident Inspector'E office on November 19, 1983 by Mr. George Hicks and 'tr. Doug VanBlarcom - Plant Operations Preliminary Approval:

W Petel B'. Fiedler C3 Vice President and Director Oyster Creek l

PBF/ dam cc: Director (2)

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, DC 205S5 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, IU 08731 DR A O O 000 9 S PDR h!

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OYSTER CREEK NUCLEAR GENERATING STATION Forked River, NJ 08731 Special Report 83-02 Report Date November 21, 1983 Occurrence Date November 19, 1983 Identification of Occurrence While fire pump 1-1 was out of service for inspection and rebuilding of the pump, fire pump 1-2 failed to start on low system pressure during a demand for fire water to fill an isolated portion of the underground fire suppression loop. With both pumps 1-1 and 1-2 inoperable, the fire suppression water system is inoperable.

Conditions Prior to Occur;rence Plant is in an outage condition witn no fuel in the vessel.

Description of Occurrence On November 19, 1983, at 1:45 p.m., the fire suppression water system at Oyster Creek was declared inoperable based on the following conditions:

1. Fire pump 1-1 had been taken out of service for inspection and rebuilding of the pump.

2. At 1:45 p.m. on November 19, 1983, fire pump 1-2 was declared inoperable after failing to start on low fire water system pressure due to an overspeed trip signal received in the Control Room on 1-2 fire diesel.

Apparent Cause of Occurrence Fire pump 1-1 is out of service for inspection and rebuilding of the pump.

'Ihe apparent cause for 1-2 fire pump failure to start on low system pressure is suspected to be a faulty overspeed trip switch.

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l Corrective Action l

Fire pump 1-2 was returned to 03erable status on November 19, 1983 at 9:10 p.m. after replacing the orerspeed trip switch and performing a fire pump operability test. The suspecte-,1 faulty overspeed trip switch and associated l overspeed equipment will be bench tested to determine cause of the trip signal  !

Condition.

Fire pump 1-1 rebuilding efforts are underway to restore pump to operable status.

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