ML19327B843

Confirms Util Commitment to Perform Addl Analysis & Support Evaluation Re Small Bore Piping,Per Insp Rept 50-260/89-36

ML19327B843
Person / Time
Site:	Browns Ferry
Issue date:	11/06/1989
From:	Michael Ray TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 8911140047
Download: ML19327B843 (3)

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. TENNESSEE VALLEY AUTHORITY

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CHATTADOOGA. TENNESSEE 37401

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U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C. 20S55 .

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Gentlemen:

t In the Matter of ) Docket Nos. 50-260 .

Tennessee Valley Authority ) I

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BROWNS FERRY NUCLEAR PLANT (BfN) - UNIT 2 - SMALL BORE PIPING PROGRAH RIGOROUS ANALYSIS POPULATION y

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Reference:

NRC Inspection Report No. 50-260/89-36 dated September 21, 1989 During the NRC audit of the Unit 2 and common smsil bore piping and tubing programs in August 1989, an issue was raised regarding the sample size used to validate attributes for the horizontal slice portion of the small bore program. This issue was documented as Unresolved Item Engineering Mechanics  !

Group (EMG)-029 in the referenced NRC Inspection Report 89-36. NRC requested  ;

that an additional 100' supports be evaluated based on rigorous analysis of the piping, thereby achieving a total rigorous analysis population of [

approximately 10 percent of the BfN Unit 2 restart scope, j It is TVA's understanding that written confirmation of this commitment.wlli i serve to close this unresolved issue. l The enclosure confirms TVA's commitment to perform this additional analysis  !

and support evaluation. The required evaluations will be performed on piping  !

currently within the approved restart boundary, which had previously been evaluated by the attribute walkdown procedure, j This evaluation will be completed before restart of BfN Unit 2. l

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8911140047 891106 i l PDR ADOCK 05000260 Q PDC An Equal opportunity Employer  ;

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• U.S. Nuc1 car Regulatory Commission NOV 06 B89 i

F If any questions exist, please telephone Patrick P. Carter, Manager of Site Licensing, at (205) 729-3570.

Very truly yours,

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[ TENNESSEE VALLEY AUTHORITY d b1 s Manaer, Nucle [rLicensing and Regulatory Affairs Enclosure

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cc (Enclosure): -

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Ms. S. C. Black, Assistant Director for Projects

. TVA Projects Division U.S. Nuclear Regulatory Commission

< One White Flint, North 11555 Rockville Pike Rockville, Maryland 20052

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Mr. B. A. Wilson, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II

' 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Browns Ferry Nuclear Plant i

Route 12. Box 637

! Athens, Alabama 35609-2000

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. List of Commitmentsi l '-.

. BFN Unit.2 Small Sore Piping Rigorous; Analysis:

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'Eveluate an additional-100 supports based on rigorous analysis' for the small m; .

. bore piping program. These evaluations will be used to. validate attributes

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for the. horizontal sitte portion of the small bore piping program.

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).[' E' This effort will be completed before restart of Browns Ferry Nuclear Plant

'm, - Unit 2.

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