ML19312B764

Forwards Request for Addl Info Re Unit 1 Cycle 5 780626 Reload Submittal.Response Requested within 30 Days

ML19312B764
Person / Time
Site:	Oconee
Issue date:	08/21/1978
From:	Reid R Office of Nuclear Reactor Regulation
To:	Parker W DUKE POWER CO.
References
NUDOCS 7911190555
Download: ML19312B764 (3)

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.-s-.e In order to complete"our review of your Oconee Unit 1 - Cycle 5

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reload submittal of June 26, 1978, we find that we need additional s

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It is requested that you provide the information identified in the enclosure to enable us to complete our review.

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signed originals and 37 additional copies within 30 days of receipt of this letter.

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cc: Mr. William L. Porter Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28242-J. Michael McGarry, III, Esquire DeBevoise & Liberman 700 Shoreham Building 806-15th Street, NW.,

Washington, D.C.

20005 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691 l

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REQUEST FOR ADDITIONAL INFORMATION

'CONEE 1 - CYCLE 5 RELOAD O

i 1.

Provide the analysis which justifies the xenon reactivity Technical Specification 3.5.2.6.a.3 requested in your letter of June 26, 1978.

2.

Your present Technical Specifications allow prolonged operation with a quadrant tilt up to 20% due to causes other than a misaligned control rod.

Discuss any potential mechanism other than misaligned control rods that could generate a quadrant tilt equal to or greater than 20%.

3.

You indicate in BAW-1493 that "The shuffle pattern for Cycle 5 was designed to minimize the effects of any power. tilt present in Cycle 4."

Provi.de a detailed description of what was done.

4.

You have stated in phone conversations that the action to be taken, if the sum of the worth of groups 5, 6 and 7 differs from predicted by more than 110%, is to measure group 4 by dilution.

And that if the sum of the worths of groups 4, 5, 6 and 7 differs from the predicted by more than 110%. additional measurements, as well as evaluation of the discrepancy, will be made.

Please provide these statements as an amendment to your 5/23/78 letter on startup testing.

5.

Your description of ejected control rod reactivity worth tests in the June 23,1978 letter does not state that 4 symmetric control rods will be measured. As sta'.ed in BAW-1477 "Oconee 1 Cycle 4 Quadrant Flux Tilt," page 12, this test "has proven to be an indicator of core symmetry." Please indicate if measurement of ejected rod worth at 4 symmetric locations is part of your test program for the Cycle 5 core.

5.

It is requested that a brief summary report of physics startup tests be submitted to the NRC within 45 days of completion of the startup tests.

This report should include both measured and predicted values.

If the difference between the measured and predicted value exceeded the acceptance criterion, the report should discuss the actions that were taken and justify the adequacy of these actions.

Kindly inform us if such a report will be submitted.

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