ML20247D113

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

ML20247D113
Person / Time
Site:	Callaway
Issue date:	05/19/1989
From:	Alexion T Office of Nuclear Reactor Regulation
To:	Schnell D UNION ELECTRIC CO.
References
IEB-88-011, IEB-88-11, TAC-72118, NUDOCS 8905250169
Download: ML20247D113 (3)

Text

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- May 19, 1989 D:cket No. 50-483 Distribution m Doctet File- TAlexion Mr. Donald F. Schnell NRC & Local PDRs OGC Senior Vice President - Nuclear PDIII-3 r/f EJordan Union Electric Company GHolahan BGrimes .

P. O. Box 149 MVirgilio ACRS(10) ]

St. Louis, Missouri 63166 PKreutzer Gray File l

Dear Mr. Schnell:

j

SUBJECT:

SCHEDULAR RELIEF REQUEST RELATED TO NRC BULLETIN 88-11

" PRESSURIZER SURGE LINE THERMAL STRATIFICATION", ITEM 1.b i (TACNO.72118) ]

The purpose of this letter is to inform you of the implementation schedule for Item 1.b of NRC Bulletin 88-11, " Pressurizer Surge Line Thermal Stratification" that was mutually agreed upon between the NRC staff and the Westinghouse Owners Group (WOG) during an April 11, 1989 meeting.

By letter dated March 10, 1989, you proposed an alternate schedule for the ccmpletion of the bounding analysis required by Item 1.b of 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 completionofItem1.b(2yearsafterreceiptoftheBulletin)wasconsistent 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 com actions of Item 1.b within the originally-state 1 period 1(pleteyear after the required receipt of the Bulletin). The staff found these proposils to be acceptable.

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

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Mr. Donald F. Schnell 2

. i Based upon your participation in the WOG program regarding this issue and I absent any other justification, your proposed alternate schedule of completing {

Item 1.b is not approved. It is our expectation that your efforts will be J accelerated to neet the completion date(s) as committed to by the WOG. ]

Sincerely,

/s/

Thomas W. Alexion, Project Manager Project Directorate III-3 Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc: See next page l

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[72118 - Denial Bul. 88-11]

Office: LA/PDIJI-3 PM jJ W P/ III-3 Surname: PKrentzer TAM lon/mr JHannon Date: J '/ g /89 f/ ']/89 ,

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Mr. D. F. Schnell Callaway Plant Union Electric Company Unit No. I cc:

Dr. J. O. Cermack Mr. Bart D. Withers CFA Inc. . President and Chief 4 Professional Dr., Suite 110 Executive Officer Gaithersburg, MD 20879 Wolf Creek Nuclear Operating Corporation Gerald Charnoff Esq. P. O. Box 411 Thomas A. Baxter, Esq. Burlington, Kansas 66839 Shaw, Pittman, Potts & Trowbridge 2300 N Street, N. W. Mr. Dan I. Bolef, President Washington, D. C. 20037 Kay Drey, Representative Board of Directors Coalition Mr. T. P. Sharkey for the Environment Supervising Engineer, St. Louis Region Site Licensing 6267 Delmar Boulevard Union Electric Company University City, Missouri 63130 Post Office Box 620 Fulton, Missouri 65251 U. S. Nuclear Regulatory Commission Resident Inspectors Office RRf1 Steedman, Hissouri 65077 Mr. Alan C. Passwater, Manager Licensing and Fuels Union Electric Company Post Office Box 149 St. Louis, Missouri 63166 Manager - Electric Department Missouri Public Service Commission 301 W. High Post Office Box 360 Jefferson City, Missouri 65102 Regional Administrator U. S. NRC, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P. O. Box 176 Jefferson City, Missouri 65102 l

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