ML17037C446

Request for Additional Information Regarding Revision to Technical Specification Related to Assembly Averaged Power-Void Relationships

ML17037C446
Person / Time
Site:	Nine Mile Point
Issue date:	06/09/1976
From:	Lear G Office of Nuclear Reactor Regulation
To:	Rhode G Niagara Mohawk Power Corp
References
Download: ML17037C446 (4)

Text

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Local PDR

~C PDR Docket 6/9/76 ORB83 rdg KGoller Docket No. 50-220 TJCarter OELD OISE (3)

GLear Niagara Mohawk Power Corporation JGuibert ATTN:

Mr. Gerald K. Rhode CParrish ,

Vice President Engineering DEisenhut 300 Erie Boulevard Nest TBAbernathy Syracuse, New Xork 13202 JRBuchanan DRoss Gentlemen: QCRS(16) gggllo Ve have completed our 1nitial review of your request by letter dated Nay 19, 1976, to revise the Nine Mile Point Unit No. 1 Technical Specification related to Assembly Averaged Power-Void Relationships.

In order for us to complete our review, we request the following additional information:

Provide a quantitative explanation of how exposure dependent "B" values are calculated. Include examples which show how different values of "B" were calculated for two different exposures of the same Xuel. The examples should show (1) the relationships (equations) assumed, and (2) the source and numerical values of all terms in the relationships for:

1. Maximum Average Planar Linear Heat Generation Rate (tQPLHGR) and Average Heat Generation Rate (q) (i.e., assumed peaking factors) ~

2. Dryout Time (i.e., hg, hin, flow, average density, g).

3. "B" values (i.e., void fraction, peaking factor, power).

In addition, demonstrate how "B" values are calculated to assure conservatism

- when using the dryout times assumed in the ECCS analysis.

If you have any questions regarding the requested information~ we would be pleased to meet with you.

Sincerely, George Lear, Chief Operating Reactors Branch 83 Division of Operating Reactors OPPICC8P ORB I]3 ORB83 5 U IIH A M C 8 JGuib x t:acr Lear OATC ~ 6( 8 /76 6i.'...,.........../?.6...

Form AEC-818 (RcT. 9.f3) hXCM 0240 Q U, 4, 4OVCIIHMCNT PRINTIN4 OPPICCI ICT4 420 IOO

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~ Niagara Mohawk Power Corporation I

CC:

Arvin E. Upton, Esquire LeBoeuf, Lamb, Leiby, g MacRae 1757 N Street, N. W.

Washington, D. C. 20036 Anthony Z. Roisman, Esquire Roisman, Kessler and Cashdan 1712 N Street, N. W.

Washington, D. C. 20036 ,

Dr. William Seymour, Staff Coordinator New York State Atomic Energy Council New York State Department of Commerce 99 Washington Street Albany, New York 12207 Oswego City Library 120 E. Second Street Oswego,. New York 13126 Mr. Robert P. Jones, Supervisor Town of Scriba R. D. N4 Oswego, New York 13126