ML20057F548

Special Rept:On 930917,invalid Failure of DG 2A Occurred. Investigation of Leak Revealed Blown Gasket.Gasket Replaced & Engine Restarted

ML20057F548
Person / Time
Site:	Vogtle
Issue date:	10/11/1993
From:	Mccoy C GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LCV-0168, LCV-168, NUDOCS 9310180164
Download: ML20057F548 (2)

Text

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m C. K. McCoy Georgia Power vite P n.sdm ft w y g . V, zue<_1  !%. JfVn @EL 5 yblE"m October 11, 1993 LCV-0168 Docket No. 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Gentlemen:

VOGTLE ELECTRIC GENERATING PLANT SPECIAL REPORT INVALID DIESEL GENERATOR FAILURE in accordance with the requirements of the Vogtle Electric Generating Plant Technical Specifications, sections 4.8.1.1.3 and 6.8.2, Georgia Power Company submits the enclosed special report concerning an invalid failure of diesel generator 2A.

Sincerely,

.. . '#/ '

C. K. hicCoy CKhi/NJS

Enclosure:

Special Report 2-93-2 xc: Omrgia Power Cpmgany Mr. J. B. Beasley, Jr.

Mr. M. Sheibani NOIG1S U. S Nuclear Reculatory Commission Mr. S. D. Ebneter, Regional Administrator Mr. D. S. Hood, Licensing Project Manager, NRR Mr. B. R. Bonser, Senior Resident Inspector, Vogtle 150063 9310180164 931011 @

PDR ADOCK 05000425 F S PDR E IE2.2.

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>. s VOGTLE ELECTRIC GENERATING PLANT- UNIT 2 TECIINICAL SPECIFICATION SPECIAL REPORT 2-93-2 INVALID DIESEL GENERATOR 2A FAILURE A. REQUIREMENT FOR REPORT This report is required in accordance with the Vogtle Electric Generating Plant Tecimical Specifications (TS), section 4.8.1.1.3, which requires all diesel generator (DG) failures, valid or invalid, be reported to the Commission in a special report pursuant to TS 6.8.2.

IL DESCRIPTION OF INVALID FAILURE OF DIESFL GENERATOR 2A -

On September 17,1993, DG 2A was started at 0626 EDT for an 8-hour full-load run prior to beginning a scheduled 5-year inspection outage. The engine was intentionally stopped at 0637 EDT on September 17,1993, afler maintenance personnel noticed a jacket water leak from the return line on cylinder head No. I on the left bank.

Investigation of the leak revealed a blown gasket. The gasket was replaced and the engine was restarted at 1020 EDT on September 17,1993, for completion of the 8-hour run.

The run was completed satisfactorily.

C.

SUMMARY

This event has been determined to be an invalid failure because of the lowjacket water pressure at the location of the leak. The diesel generator would have been available for emergency operation because the leak was minor and could have been mitigated, and jacket water flow makeup could have been initiated, if required.

Diesel generator 2A has had no valid failures in the last 20 valid tests and no valid failures in the last 100 valid tests. The test frequency remains at once per 31 days in accordance with the requirements of TS table 4.8-1.

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