ML17037C540

Letter Requesting Analyses and Other Relevant Data for Determining the Consequences of Densification and the Effects on Normal Operation, Anticipated Transients, and Accidents, Including Loss-Of-Coolant Accident

ML17037C540
Person / Time
Site:	Nine Mile Point
Issue date:	11/20/1972
From:	Giambusso A US Atomic Energy Commission (AEC)
To:	Brosnan T Niagara Mohawk Power Corp
References
Download: ML17037C540 (4)

Text

Docket No.50-220 Niagaxa Mohawk Power Corporation ATTN."Ur.Thomas J.Brosnan Vice President and Chief Engineer 300 Erie Boulevard Qest Syracuse, New Yor1s l3202 RE: NINE NILE POINT UNIT 1 Gentlemen.

'I The Commission's Regulatory Staff has complected a review of fuel densification an4 its effect on reactor operation including transients and postulated, loss-of-coolant.'ccidents.

The Staff's investigations and conclusions are reported in"Technical Report on Densification of Light Hater Reactor Fuels" dated November 14, 1972, a copy of which is enclosed for your information and guidance.This report concludes that densification of fuel may occur and that the resulting formation of fuel column gapa should be anticipated in all light water reactor fuels.The report also provides the essential elements to be included in calculational models used to account for the effects of fuel densi-fication.The Regulatory Staff believes that the fuel in the sub5ect facility is susceptible to densification.

Therefore, we'request that you provide the necessary analyses and other relevant data for determining the consequences of densification and the effects on normal operation, anticipated transients, and accidents, including the postulated loss-of-coolant accident, using the guidance provided in the enclosed report.These analyses should be provided for your present and next fuel loadings.If the analyses indicate that changes in design or operating conditions are necessary to maintain required margins, you should submit proposed changes and operating limitations with the analyses.

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Niagara Mohawk Power Corporation

-2>>N0V~lD]S72 In order that the Regulatory Staff can conduct an expeditious and orderly review of these matters, we request that you submit the analyses and.additional infoxmatio~

within 45 days from the date of this 1 atter.It is requested that this information be provided with one si gned original and thir ty-nine additional cop ies.Sincerely', O glnnl Signed by A Pzln~4111'c0~~A.Giambusso, Deputy Director for Reactor Pxo)acts 3)irectoxate of Licensing

Enclosure:

Technics 1 Report on Densification (November 14, 1 972)cc w/o enclosure'nrin E.Upton, Esquire LeBoeuf, Lamb, Leiby 6 lfacRae1821 Jeff erson Place, N.M.Mashing ton~D.C.20036 cc w/enclosure+

Oswego City Library 120 East Second Street Oswego, New York 13126 Di s tr ib u tion locke t File XCRS (16)HQ PDR D JSkovho 1 t, L: OR DLZiemann, L:ORB 82 C JDeBevec, L: ORB//2 TJ Car ter, L: OR RMDiggs, L: ORB//2 RP Reading L Reading Branch Reading JRBuchanan, ORNL TWLaughlin, DTIE RO (3)Massar/Haf li ch, OGC-DKnuth, L: RS (2)RTedes co, L: CS (2)SDMacKay, L: ORB//l I.: ORB/$1 OFFICE SDMacKay: s jh ll/88/72 SURNAME>OATE perm AEO 318 (Rev.9-S3)AECM 0240 L: ORB 82" aP C JDeBevec 1 1/Zo/72 Z,:O fP k.DLZi emann 1 1/gpss 7 2 L:OR D J S kVyko.l t, 3,1/,9/.72........,....

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