ML20034A797

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Responds to NRC Bulletin 90-002, Loss of Thermal Margin Caused by Channel Box Bow. Util Uses Channel Boxes for Only One Bundle Lifetime & Thus Not Subj to Reporting Requirements of Bulletin
ML20034A797
Person / Time
Site: Cooper Entergy icon.png
Issue date: 04/11/1990
From: Kuncl L
OMAHA PUBLIC POWER DISTRICT
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CNSS903090, IEB-90-002, IEB-90-2, NUDOCS 9004240333
Download: ML20034A797 (2)


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COOPER NUCLEAR $1 ATtoN Nebraska Public Power District

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CNSS903090 April 11, 1990 l

U. S. Nuclear Regulatory Commission ATTN Document Control Desk Washington, D. C.

20$$5 Subjects NRC Bulletin No. 90-02: Loss of-Thermal Margin Caused by Channel Box Bow Gentlement NRC Bulletin No. 90-02 requested that NPPD determine whether any channel boxes are being reused af ter their first bundle lifetime and, if so, ensure that the effects of channel box bow on the critical power ratio (CPR) calculations are properly taken into account. NPPD uses channel boxes for only one bundle lifetitue and, thus, is not subject to the reporting requirements specified by NRC Bulletin No 90-02.

Sincerely, L. G. Kunc1 Nuclear Power Group Manager LGK/ju lDRo0424o333 9004n a

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~ Powerful Pride in Nebraska '

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