ML20245K458

Informs of Implementation Schedule for Item 1.b of NRC Bulletin 88-011, Pressurizer Surge Line Thermal Stratification, Mutually Agreed Upon Between NRC & Westinghouse Owners Group During 890411 Meeting

ML20245K458
Person / Time
Site:	Sequoyah
Issue date:	06/22/1989
From:	Black S Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
References
IEB-88-011, IEB-88-11, TAC-72166, TAC-72167, NUDOCS 8907050132
Download: ML20245K458 (3)

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t UNITED STATES NUCLEAR REGULATORY COMMISSION WASHING TON, D. C. 20555

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June 22, 1989 Docket Nos. 50-327 and 50-328 i

Mr. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37401-28U1

SUBJECT:

SCHEDULAR RELIEF REQUEST RELATED TO NRC BULLETIN 88-11

" PRESSURIZER SURGE LINE THERMAL STRATIFICATION", ITEM 1.b (TACN05.72166/72167)- SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 The purpore uf this letter is to inform you of the implementation schedule for Item l,b of NRC Bulletin 88-11, " Pressurizer Surge Line Thermal Stratification,"

i that was mutually agreed upon between the NRC staff and the Westinghouse OwnersGroup(WOG)duringanApril 11, 1989 meeting.

By letters dated April 18 and May 26, 1988, you proposed an alternate schedule for the completiun of the bounding analysis for Sequoyah required by Item 1.b uf NRC Bulletin 88-11 regarding the design adequacy of the pressurizer surge line, taking into account the effects of thermal stratification. Your proposed schedule for completion of Item 1.b by. January 3,1991, was consistent with the alternate schedule proposed by the Westinghouse Owners Group (WOG) program.

During an April 11, 1989 meeting between'the staff and the WOG. the staff expressed that the alternate schedule as originally proposed by the WOG was unacceptable. Based upon additional discussion, the WOG agreed to notify its ,

membership that licensees of plants in operation over 10 years should, by the end of May 1989, complete and have available for NRC audit, their bounding '

analysis as related to Item 1.b of the Bulletin, and submit to the NRC a Justification for Continued Operation (JCO) in the event the results of the bounding analysis do not confirm the adequacy of the pressurizer surge line for the design life of the plant. Licensees of plants in operation less than 10 years would be notified that they were required to complete the required actions of Item 1.b within the originally stated period (one year from receipt of the Bulletin). The staff found these proposals to be acceptable.

It is our understanding that the WOG will provide you with a " generic" bounding l analysis, to which your plaiit specific variables (e.g., seismic and thermal loadings) will need to be added and incorporated. Your analysis should sssess all aspects of thermal stratification and thermal striping, including bounding evaluations on stresses and fatigue, based on currently available information.

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8907050132 890622 QPDR. ADOCK 05 COO 327 PDC - .'

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l (Mr., Oliver D. Kingsley, Jr. ., .

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. . Based'upon your participation in the WOG program regarding'this issue'and-absent any. Other justification. your. proposed alternate schedule of completing.

. Item 1.b is not approv'edt It is' our expectation that your' efforts will be accelerated to meet the completion.date(s) as committed to by the WOG.

Sincerely,.

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Original. signed by Suzanne Black,' Assistant' Director-for Projects-TVA Projects Division Office of Nuclear Reactor Regulation-

.cc: .See next page Distribution Docket File NRC PDR-Local PDR.

. Projects Reading ADSP Reading.

D.'Crutchfield B. D. Liaw S. Black

, T.LQuay R. Pierson B.-Wilson L. Watson J. Brady M. Simms J. Donohew-0GC

.T. Chan B. Grimes E.' Jordan ACRS(10)

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Mr. Oliver D. Kingsley, Jr. cc:

General Counsel Mr. Kenneth M. Jenison Tennessee Valley Authority Senior Resident Inspector 400 West Summit Hill Drive Sequoyah Nuclear Plant Ell 833 U.S. Nuclear Regulatory Commission Knoxville, Tennessee 37902 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 Mr. F. L. Moreadith Vice President, Nuclear Engineering Mr. Michael H. Mobley, Director Tennessee Valley Authority Division of Radiological Health 400 West Sumit Hill Drive T.E.R.R.A. Building, 6th Floor W12 A12 150 9th Avenue North Knoxville, Tennessee 37902 Nashville, Tennessee 37219-5404 Dr. Henry Myers, Science Advisor Vice President and Nuclear Comittee on Interior Technical Director and Insular Affairs Tennessee Valley Authority U.S. House of Representatives SN 1578 Lookout Place Washington 0.C. 20515 Chattanooga, Tennessee 37402-2801

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Tennessee Valley Authority Mr. M. J. Ray, Acting Director Rockville Office Nuclear Safety and Licensing 11921 Rockville Pike Tennessee Valley Authority Suite 402 SN 1578 Lookout Place Rockville, Maryland 20852 Chattanooga, Tennessee 37402-2801 Mr. John L. LaPoint Site Director Sequoyah Nuclear Plant Tennessee Valley Authority P. O. Box 2000 Soddy Daisy, Tennessee 37379 Mr. M. Burrynski Acting Site Licensing Manager Sequoyah Nuclear Plant P. O. Box 2000 Soddy Daisy, Tennessee 37379 County Judge Hamilton County Courthouse Chattanooga, Tennessee 37402 Regional Administrator, Region II .

U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W. .

Atlanta, Georgia 30323 )

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