ML20128F998

Discusses NRC Acceptance of CEN-203 Re Small Break LOCA Model (CEFLASH-4AS) Per TMI Action Item II.K.3.30,pending Util Validation of Model,Per 850311 Commitment.Analysis for Item II.K.3.31 Not Required

ML20128F998
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/26/1985
From:	Butcher E Office of Nuclear Reactor Regulation
To:	Jeffery Griffin ARKANSAS POWER & LIGHT CO.
References
TASK-2.K.3.30, TASK-2.K.3.31, TASK-TM NUDOCS 8507080437
Download: ML20128F998 (2)

Text

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June 26, 1985 Docket No. 50-368 Mr. John M. Griffin Senior Vice President, Energy Supply Arkansas Power & Light Company P.O. Box 551 Little Rock, Arkansas 72203

SUBJECT:

TMI ACTION PLAN ITEM II.K.3.30, SMALL BREAK LOCA ANALYSIS AND II.K.3.31, PLANT ANALYSIS On June 20, 1985, the NRC found acceptable the Combustion Engineering Owners Group (CE0G) submittal, CEN-203, which justified continued acceptance of the CE small break LOCA model (CEFLASH-4AS) in meeting the requirements of TMI Action Item II.K.3.30. This acceptance, however, is pending a confirmatory benchmark analysis to demonstrate good agreement between CEFLASH-4AS and the data from Semiscale test S-UT-08. On March 11, 1985, R. W. Wells, as Chairman of CEOG, committed to the performance of the validation and projected a December 1985 schedule for submittal of a report on this effort.

On June 21, 1985, Arkansas Power & Light Company also provided a letter referencing the CE0G March 11, 1985 letter and commitment to the validation of the CEFLASH-4AS agreement with the S-UT-08 test. Pending the successful validation of CEFLASH-4AS and based on our understanding that CEFLASH-4AS was used for Arkansas Nuclear One, Unit No. 2, we find that you have met the requirements of TMI Action Item II.K.3.30 and a plant specific analysis is not required for II.K.3.31. These items are therefore complete.

Please advise this office within 30 days of receipt of this letter, or upon unsuccessful validation of the model, if for any reason our understanding is not correct and provide your plans and schedule for completing II.K.3.30 and II.K.3.31.

Sincerely, Edward J. Butcher, Acting Chief Operating Reactors Branch No. 3 Division of Licensing cc: See next page Distribution: , Docket File. NRC & LPDrs OELD PKreutzer Branch Files

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Mr. John M. Griffin Arkansas Power & Light Company Arkansas Nuclear One, Unit No. 2 Mr. J. Ted Enos,: Manager, Licensing Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203 Mr. James M. Levine, General Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 Nicholas S. Reynolds, Esq.

Bishop, Liberman, Cook, '

Purcell & Reynolds 1200 Seventeenth Street, N.W.

Suite 700 Washington, DC 20036 Mr. Charles B. Brinkaan, Manager Washington Nuclear Operations C-E Power Systems 7910 Woodmont Avenue Bethesda, Maryland 20814 Regional Administrator (2)

USNRC, Region IV Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Mr. William D. Johnson U.S. NRC P. O. Box 2090 Russellville, Arkansas 72801 Mr. Frank Wilson, Director Division of Environmental Health Protection Arkansas Department of Health 4815 West Markam Street Little Rock, Arkansas 72201 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite-220 7910 Woodmont Avenue Bethesda, MD 20814