ML19326C491

Responds to Util 780331 Justification for Continued Facility Operation W/Reactor Vessel Surveillance Program Conducted at Davis Besse 1.Evaluation Supporting Util Conclusions Encl

ML19326C491
Person / Time
Site:	Arkansas Nuclear, Davis Besse
Issue date:	08/14/1978
From:	Reid R Office of Nuclear Reactor Regulation
To:	Cavanaugh W ARKANSAS POWER & LIGHT CO.
References
NUDOCS 8004230610
Download: ML19326C491 (5)

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q Arkansas Power &' Light Company i

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J Phillip K. Lyon, Esquire House, Holns & Jewell 1550 Tower Building Little Rock, Arkansas 72201 Mr. Daniel R. Willians flanager, Licensing A-kansas power & Light Company i.t Of fice Box 551

3. - ~ 2

.~1e Rock, Arkansas 72203 e'....chn W. Anderson, Jr.

Plant Superintendent Arkansas Nuclear One Post Office Box 6L8 Russellvill'e, Arkansas 72801 Arkansas Polytechnic Colleg Russellville, Arkansas 72dul m

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EVALUATION SUPPORTING CONTINUED OPERATION OF ARKANSAS NUCLEAR ONE - UNIT 1 By letter dated March 31, 1978, Arkansas Power and Light Company (AP&L) the licensee of Arkansas Nuclear One - Unit 1, advised the NRC that Davis Besse, Unit 1 had failed to achieve ccmmercial operation at 100%

power by January 1,1978, and provided a justification for continued operation of ANO-1. The reason for this justification is that the surveillance specimens for Arkansas 1 are being irradiated in the Davis Besse, Unit i reactor vessel and Technical Specif;rtcion 4.2.8 requires that if Davis Besse, Unit 1 fails to achieve 100% power by January 1,'1978, the licensees of these vessels shall submit a report to NRC justifying continued operation.

The date of commercial operation for Davis Besse 1 is November 20, 1977.

Since the beginning of 1978, Davis Besse operated at abcut 75% capacity until May 5,1978. On May 5 the plant was shut down to inspect and replace burnable poison rod assemblies.

It is anticipated that Davis Besse 1 will startup by the middle of June and full power is expected to be reached shortly thereafter. The plant has reached full power on two days, April 4 and 5,1978.

To date the plant has operated for 87 EFPD.

At the end of 345 EPD's of cperation of Arkansas Nuclear One - Unit 1 (ANO-1), capsule ANI-E was withdrawn and the contents were tested.

Based on the results of theIe tests the ANO-1 pressure-temperature limits of the reactor coolait pressure boundary were modified and these new limits are appliczble through 5 effective full power years (EFPY)ofoperation. As of February 2,1978, ANO-1 completed the second cycle of operatien.

The accumulated days of service as of this date were 772 EFPD.

The first ANO-1 capsule to be withdrawn from Davis Besse will be at the end of the first Davis Besse cycle and will have re:eived a fluence of 6.5 x 10 8 n/cm2 The data from this caosule 1

will be available in time to provide a basis for updated pressure-temperature operating limits for ANO-1 prior to the expiration of the present limits.

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We have reviewed the requests for continued operation of ANO-1. We conclude that ANO-l should b cllowed to continue operation for the feilowing reasons:

(1) The delay in getting data from ANO-1 surveillance programs resulting from the delay in Davis Besse reaching 100% power will not affect the generation of new operating limits for these plants.

(2) A prime objective of the Babcock and Wilcox integrated surveillance program is to obtain data-on as many Babcock

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and Wilcox weld materials as possible by the early 1980's.

This information is. required to implement the positions to be developed in the generic technical activity on low upper shelf materials.

A delay of 1/2 year in getting the results of surveillance specimens being irradiated in Davis Besse will not adversely affect this activity.

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