ML18051B493

Application for Amend to License DPR-20,revising Surveillance Frequency for Diesel Generator from 18 Months to Once Per Refueling Cycle

ML18051B493
Person / Time
Site:	Palisades
Issue date:	08/01/1985
From:	Reynolds J CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18051B492	List: ML18051B491 ML18051B493 ML18051B494
References
NUDOCS 8508060187
Download: ML18051B493 (3)

Text

CONSUMERS P6WER--COMPANY" Docket 50-:255 Request for Change to the Technical Specifications License DPR-20 For the reasons hereinafter set forth, it is requested that the Technical Specifications contained in the Provisional Operating License DPR-20, Docket 50-255, issued to Consumers Power Company on October 16, 1972, for the Palisades Plant be changed as described in Section I below:

I. Changes A. Revise the first sentence of Section 4.7.lc to read:

" * *

• at least once per refueling-cycle during plant shutdown."

II. DISCUSSION The change to Technical Specification 4.7.lc is requested to prevent shutdown from power operation for the sole purpose of performing preventive maintenance on the diesel generators. The current Technical Specification requires performance of preventive maintenance every 18 months during shutdown. However, during fuel cycles which last longer than 18 months, it would be required that the plant be shutdown from power operation just to perform this test. Additionally, the required amount of maintenance to be performed on this test takes longer than the 7-day Limiting Condition of Operation permits, so the test cannot successfully be performed during power operation. A change is, therefore, requeste4 to allow performance of this test once during each fuel cycle during plant shutdown (approximately every 18 to 30 months).

The diesel generator vendor recommends that preventive maintenance be performed on a basis considering both acquired hours of engine service and time intervals between these activities. Considering that the Duty Class of the diesel generators is light, a change of this interval from 18 months to once each fuel cycle poses no additional significant threat to diesel generator reliability. Communications with the diesel generator v.endor indicated their concurrence on this extension.

Additionally, a review of the monthly Technical Specification Surveillance Tests performed on the diesel generators reveals no significant unresolved concerns in regards to the diesel generators.

- .And review of Technical Specification required_ inspections performed on the diesel generators during the previous two refueling outages (1983-1984, and. 1981) indicated that there were no major or unusual findings encountered.

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Analysis of No Significant Hazards Consideration

__________ 1'!}_e_ d_iesel generator vendor recommends that preventative maintenance inspecti~n:~ b~- perfomeci-on a basis--wh:ich "considers both- a"cciufred hours of engine service and time intervals between activities. The current vendor recommended surveillance schedule for the Palisades Plant diesel generators includes monthly, annual, 3-year, 6-year, and 12-year inspections. A change to a refueling cycle frequency from an 18-month frequency will not affect meeting the vendor recommendations. Monthly and annual inspections do not require plant shutdowns to remove the diesel generators from service. Thus the extension of this surveillance frequency will not significantly increase the probability of occurrence or consequences of an accident previously evaluated, as diesel generator reliability should not be substantially affected, i f at all, by the proposed change. In addition the change in frequency has no effect on creating an accident or malfunction of a different type than previously evaluated. And finally the margin of safety as defined in the Technical Specifications bases will not be reduced (no basis for this surveillance requirement is given by the current -Technical Specifications bases) because vendor recommended surveillance schedules will be satisfied.

III. Conclusion The Palisades Plant Review Committee has reviewed this Technical Specification Change Request and has det~rmined that this change does not involve an unreviewed safety question and therefore involves no significant hazards considerat~on. This change has also been reviewed under the cognizance of the Nuclear Safety Board. A copy of this Technical Specification Change Request has been sent to the State of Michigan official designated to receive such Amendments to the Operating License~

CONSUMERS POWER COMPANY By s, Executive Vice Energy Supply Sworn and subscribed to before me this 1st day of August 1985.

Dempski, Nota Public

- ~?ckson County, Michigan My cpnnp..issiori'. expires October 12, 1987

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ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES August 2, 1985 1 Page

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