ML20091N868

Ro:On 840429,diesel Engine Driven Fire Pump FP-P-2 Failed to Complete Surveillance Test & Declared Inoperable.Cause Unknown.Fuel Shutoff Valve Assembly,Voltage Regulator, Generator & Indicating Lamp Bulb & Socket Replaced

ML20091N868
Person / Time
Site:	Beaver Valley
Issue date:	05/25/1984
From:	Lacey W DUQUESNE LIGHT CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
ND1SS1:2087, NUDOCS 8406120488
Download: ML20091N868 (3)

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'Af Telephone (412) 3934000 .

N le r Division Sh!ppingport, PA 150774004 l

l May 25, 1984 NDISS1:2087 Beaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66 Special Report Dr. Thomas E. Murley Regional Administrator United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406

Dear Dr. Murley:

In accordance with Appendix A, Beaver Valley Technical Specification, 3.7.14.1, Fire Suppression Water System, the following Special Report is submitted. This re-port is required when the conditions specified in Technical Specification 3.7.14.1.a are not satisfied.

On April 29, 1984, during the performance of a normally scheduled surveillance test on the Diesel Engine Driven Fire Pump [FP-P-2], the pump failed to successfully complete the surveillance test. The fire pump was then declared inoperable. Techni-cal Specification 3.7.14.1 requires that the Fire Suppression Water System be oper-able with two high pressure pumps at all times. This is non-conservative with respect to Technical Specification 3.7.14.1 and reportable per Technical Specification 6.9.2(4).

After the fire pump was started, the pump ran for four (4) minutes and then tripped. The Auto-Start indicating light on the local control panel burst, and smoke was observed emanating from the top of the local control panel. Electrical Maintenance was called fri to troubleshoot and repair the fire pump. During this investigation, the following conponents were found to be faulty and were replaced: the voltage regulator, the generator and the Auto-Start indicating lamp socket. During the troubleshooting and repair process, the Crank Cutoff Relay flashed, caused a short circuit, and inciner-a ted . The fuel shutoff valve assembly was also found to oe operating improperly. The Crank Cutoff P.elay and the fuel shutoff valve assembly were also replaced.

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C T. E. Murley NDISS1:2087 May 25, 1984 Page two The root cause for this incident is unknown. The following causes are postulated, but in each case no substantial evidence could be found to support each supposition:

(1) faulty voltage regulator, (2) faulty generator, (3) an incorrect polarity condition existed between the generator and the battery which may have caused the generator or the voltage regulator to fail .

It should be noted that any one of the above-mentioned conditions could have caused one or the other two conditions.

Immediate corrective actions taken were to replace-the fuel shutoff valve assembly, the voltage regulator, the generator, the indicating lamp bulb and socket, and the Crank Cutoff Relay. This polarity condition is believed to be caused by opening of the battery disconnect circuit breakers prior to a fire pump run when the engine is put on clearance for testing of maintenance. To preclude this condition from occurring, caution signs, alerting personnel of the possible dangers incurred when the battery disconnect' switches are opened, will be placed on the local ' control panel next to the disconnect switches. Voltage regulator polarization. instructions have been reviewed by the electrical maintenance group.

- There were no safety implications to the public because the motor driven fire pump was operable at all times and a temporary portable fire pump was avail-able if required.

There have been six previous licensee event reports issued on FP-P-2 (LERs:

Special Report in 1978, LER 80-030/01T, LER 80-052/01T, LER 80-059/01T, LER 80-069/

01T, and LER 83-010/99X) . This is the first LER issued for this type of failure.

The fire pump is a vertical turbine type fire. pump manufacturer by Peerless Pumps with a Cummins diesel enigne.

fylb Wm./S. Lacey /

Station Superi(terl dent

-WSL/md

T. - E. 44urley -

May 25,.1984

. NDISS1:2087.

Page three c'c: Director of- Management & Program Analysis United States Nuclear Regulatory Commission Washington, D.C. 20555 l .C. A. Roteck, Ohio ' Edison 'l  ?'^

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Director, Office of" Inspection and Enforcement Headquarters United States Nuclear Regulatory Commission Washington, D.C. 20555 Mr. Peter Tam,.BVPS Licensing Project Manager United States Nuclear Regulatory Commission Washington, D.C. 20555 W. Troskoski, Nuclear Regulatory Commission, BVPS Site Inspector Mr. Alex Timme, CAPC0 Nuclear Projects Coordinator, Toledo Edison INP0 Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, GA 30339 T

G. E. Nckle, Factory Mutual Engineering, Pittsburgh Mr. J. A. Triggiani, Operating Plant Projects Manager Mid Atlantic Area Westinghouse Electric Corporation Nuclear Services Integration Division Box 2728 Pittsburgh, PA 15230:

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