ML20078H071

Discusses Conditions Affecting Safety of Project That Documents Problem Encounter W/Spillway EDG at Plant Main Dam & Informs on 950103 Spillway EDG Failed to auto-start During Performance of Monthly Periodic Test

ML20078H071
Person / Time
Site:	North Anna
Issue date:	01/30/1995
From:	Saunders R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Crisp R FEDERAL ENERGY REGULATORY COMMISSION
References
F95-001, F95-1, NUDOCS 9502060049
Download: ML20078H071 (2)

Text

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January 30, 1995 VIRGINIA POWER j Mr. R. W. Crisp Serial No. F95-001 Regional Director Federal Energy Regulatory Commission 3125 Presidential Parkway, Suite 300 Atlanta, Georgia 30340

Dear Mr. Crisp:

PROJECT NO. 6335-VA '

NORTH ANNA HYDROELECTRIC PROJECT EMERGENCY DIESEL GENERATOR AUTO START FAILURE Pursuant to the requirements of 18 CFR 12.10(a), Conditions Affecting the Safety of a Project, this mport documents a problem encountered with the Spillway Emergency l Diesel Generator (SEDG) at the North Anna Main Dam. On January 3,1995, the SEDG failed to auto-start during performance of the monthly periodic test. Once the pre-operational checks were completed, the selector switch was placed in the test ,

position, but the SEDG failed to start. The Operations Shift Supervisor was notified of '

the failed start. A corrective maintenance work order was immediately initiated to  !

trouble-shoot and repair the SEDG. Trouble-shooting activities for the electrical j circuitry identified a failed start solenoid relay. The start solenoid relay was replaced and the SEDG was started. The periodic test was completed satisfactorily and the SEDG was returned to service on January 4,1995.

Failure o; the SEDG to start did not pose any significant safety concerns since normal AC power was available to operate the spillway gates. Additionally, the spillway gates are designed to be operated manually if a loss of both normal and emergency AC power occurs. Station procedures provide directions to Operations personnel if manual gate control becomes necessary.

This event was reported by telephone to the Federal Energy Regulatory Commission at 0252 hours0.00292 days <br />0.07 hours <br />4.166667e-4 weeks <br />9.5886e-5 months <br /> on January 3,1995. The Nuclear Regulatory Commission was also contacted by telephone at 0313 hours0.00362 days <br />0.0869 hours <br />5.175265e-4 weeks <br />1.190965e-4 months <br /> on January 3,1995 due to notification of an offsite agency in accordance with 10 CFR 50.72(b)(2)(vi).

Should you have any questions regarding this report, please contact us. l Very truly yours, j

R. F. Saunders 030006 /M FEE $88&T!!gfgg, g\0 PDk

l 6 a t

oc: U.S. Nuclear Regulatory Commission  :

Attn: Document Control Desk Washington, D. C. 20555 License Numbers: NPF-4/NPF-7 Docket Numbers: 50-338/50-339 U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, N.W. '

Suite 2900 Atlanta, Georgia 30323 Mr. R. D. McWhorter NRC Senior Resident inspector '

North Anna Power Station I

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