ML20154A357

Application to Amend CPPR-131,revising Latest Const Completion Date to 870601 Due to Extended Const & Turnover for Testing Periods.Fee Paid

ML20154A357
Person / Time
Site:	Byron
Issue date:	02/27/1986
From:	Delgeorge L COMMONWEALTH EDISON CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
1283K, NUDOCS 8603040001
Download: ML20154A357 (2)

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)^ '"N) OneCommonwealth Edison First National Plaza. Chicago. litanois O' Address Reply to: Post Office Box 767

\ Chicago. Illinois 60600 February 27, 1986 l

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i Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation l U.S. Nuclear Regulatory Commission Washington, DC 20555 l

Subject:

Byron Station Unit 2 Construction Permit Extension NRC Docket No. 50-455 Reference (a): October 12, 1982 letter from D. G. Eisenhut to L. O. DelGeorge

Dear Mr. Denton:

Pursuant to the provisions of 10 CFR 50.55(b), commonwealth Edison hereby requests an amendment to the Byron Unit 2 Construction Permit CPPR-131. As indicated in reference (a), the latest construction completion date specified in the construction permit is April 1, 1986. For reasons discussed below, it is requested that the latest construction completion date be revised from April 1, 1986 to June 1, 1987. This amendment only involves a change to the constatetion completion dato. It. does not involve a significant hazards consideration and has no significant environmental impact.

The need for an extension of time beyond the present construction pet 1 nit completion date is a result of extended construction and turnover for testing periods. The longer construction period resulted primarily from focusing resources on completion of Unit 1, which delayed reallocation of construction workers to Unit 2. In addition, port. ions of the construction work force for Unit 2 have occasionally shifted back to Unit 1 to make modifications necessary for plant availability.

The longer construction period for Unit 2 also resulted from greater than estimated quantities of electrical and mechanical work as actually learned from completion of Unit 1. Testing of Unit I revealed the necessity to install several modifications to enhance operation of the plant that further increase the amount of work required. These modifications have been incorporated into the Unit 2 construction schedule.

8603040001 860227 PDR A ADOCK 05000455 PDR

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H. R. Denton February 27, 1986 The combination of the factors discussed above put Unit 2 construc-tion completion behind schedule and subsequently impacted systems turnover for testing. Additional system turnover delays have been encountered in complying with NRC environmental qualification requirements for electrical equipment. As equipment deficiencies and component malfunctions occurred during preoperational testing, long procurement times for qualified parts added to the delay.

Although the requested revised completion date extends beyond the date by which Commonwealth Edison currently expects to load fuel at Byron Unit 2, this letter does not represent a change to the current fuel load schedule. The revised completion date reflects a conservative estimate of actual completion of the Unit. This has been done to avoid the necessity of having to request another construction completion date extension at some future time should any unanticipated delays in construction actually occur.

Three (3) signed originals and thirty-seven (37) copies of this letter are provided for NRC review.

Enclosed is a check in the amount of $150.00 submitted in accordance with the fee schedule defined in 10 CFR 170.21.

Very truly yours,

. dJ L. O. DelGeorge Assistant Vice-President im cc: Byron Resident Inspector SUBSCR BED AND SWO to befor m this d day of MA40 , 1986 A d /2h

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Notary Public I

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