ML20078S835

Discusses Insp Repts 50-269/93-02,50-270/93-02 & 50-287/93-02 & Util Subsequent Response Re Commitment to Revise Lee Voltage Calculation,Finding 2C.Rev Uses Cyme Program to Be Included in EP Project for 950601

ML20078S835
Person / Time
Site:	Oconee
Issue date:	12/21/1994
From:	Hampton J DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9412290239
Download: ML20078S835 (2)

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4 11 i DukeIbwer Company JWHwms Cxonee NuclearSite Vice President PO Box H39 (803Ri&%3499 Omce Seneca,SC M 79 (803)8&S1564 Fax DUKE POWER December 21, 1994 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555

Subject:

Oconee Nuclear Station Docket Nos. 50-269, -270, -287 EDSFI Findings (Inspection Report 50-269,-270,-

287/93-02)

The response dated July 6, 1993 to the findings in Inspection Report 50-269,-270,-287/93-02 included a commitment to revise the Lee voltage calculation (Finding 2C). This revision would use the CYME program and include the transient response of the source with the present transient response of the loads. This calculation revision has been included in the Emergency Power Project with a completion date of 6/1/95.

This is the first extension from the initial completion date of 12/30/94.

In addition, Finding 2C contained a commitment to revise the calculation supporting voltage adequacy from the Central Switchyard. This revision will incorporate the lower source impedance for the CTS transformer in the calculation. This revision has been included in the Emergency Power Project with a completion date of 6/1/95. This is the first extension from the initial completion date of 12/30/94.

Finding 2G requires the performance of a calculation to analyze the Keowee DC circuits down to the component level. i This calculation has been included in the Emergency Power  !

Project with a completion date of 6/1/95. This is the fourth  !

extension for this commitment from the initial completion l date of 12/31/93. I l

Development of a calculation to analyze the voltage adequacy j for the SSF diesel generator was committed to in the response I to Finding 2I. This calculation has been included in the Emergency Power Project with a completion date of 6/1/95.  !

This is the first extension from the initial completion date of 12/30/94.

The response to Finding 6B indicated that the valves 10G-7  !

and 20G-7 will be tested to verify valve operation and qualify the successful performance of the valves. The 1 9412290239 941221 \

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, b Document Control Desk December 21, 1994 Page 2 testing is desired to be performed in conjunction with the governor maintenance at Keowee. The governor maintenance is scheduled to occur in the first half of 1995. Therefore, an extension of the completion date to 6/1/95 is needed. This is the third extension of the commitment item from the initial completion date of 12/31/93.

If there are any questions, please contact Michael Bailey (803) 885-4390.

Very Truly Yours,

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k ?/ J. W'. Hampton xc: L. A. Wiens, Project Manager ONRR P. E. Harmon, Senior Resident Inspector Oconee Nuclear Station S. D. Ebneter, Regional Administrator Region II