ML20207D666

Forwards Assessment of Design of Restraints on Main Steam Piping & Primary Loop Auxiliary Piping Systems at Point Beach Nuclear Plant.Staff Concludes That WE Unable to Retrieve Original Analyses That May Have Been Performed

ML20207D666
Person / Time
Site:	Point Beach
Issue date:	02/22/1999
From:	Wetzel B NRC (Affiliation Not Assigned)
To:	Sellman M WISCONSIN ELECTRIC POWER CO.
Shared Package
ML20207D673	List: ML20207D666 ML20207D675
References
NUDOCS 9903100037
Download: ML20207D666 (2)

Text

f 4 Mr. Micha $ B. S:llm:n February 22, 1999 S:nior Vics President and' l Chief Nuclear Officer.

Wisconsin Electric Power Company  ;

231 West Michigan Street i Milwaukee, WI 532C'1

, SUBJECT POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 - ASSESSMENT OF THE 1 DESIGN INFORMATION ON PIPING RESTRAINTS i

Dear Mr. Sollman:

By letter dated April 16,1998, the NRC informed Wisconsin Electric (WE) that it was performing a review of records related to the design of restraints on the main steam (MS) piping and i primary loop auxiliary piping systems at the Point Beach Nuclear Plant (PBNP). Specific requests for information were included in an enclosure to the April 16,1998, letter. On June 15,1998, WE responded to the request for information based on available records and

your staff's recollection of original design aspects requested in the NRC staff's inquiry. As a fol!ow up to this assessment activity, the staff visited WE corporate offices on October 15 and i 16,1998, to review relevant design records and interview WE representatives. Duke l Engineering and Services (DE&S) was recently contracted by WE to perform an independent

' evaluation of the existing MS piping at PBNP to confirm the adequacy of restraint design in the MS piping system. ,

Rased on this review, the staff concludes that WE was unable to retrieve the original analyces that may have been performed to justify the removal of the shim collars in the early 1970s, and 1

hence, the staff cannot conclude whether or not their removal was justified in consideration of the licensing-basis requirements at that time. However, based on the recent evaluations of the MS piping examined by the staff, WE has provided adequate technical justification for the removal of certain shim collars in the MS piping restraints. The staff also finds that WE has

provided a reasonable basis to confirm the structural adequacy of the current as-built configuration of the MS and auxiliary piping systems.

An assessment detailing the staf"s review of design information on piping restraints at PBNP is enclosed. If you have any further questions regarding this issue, please contact me at (301) 415-1355.

Sincerely, ORIGINAL SIGNED BY Beth A. Wetzel, Senior Project Manager g 9903100037 990222 Project Directorate ill-1 {

PD3 ADOCK 05000266 Divtsion of Reactor Pro'ects Ill/lV P PDR Office of Nuclear Reac or Regulation fl Docket Nos. 50-266 and 50-301 i

Enclosure:

Assessment

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-Mr. Michael B. Sellman Point Beach Nuclear Plant Wisconsin Electric Power Company Units 1 and 2-cc:

Mr. John H. O'Neill, Jr. - Ms. Sarah Jenkins Shaw, Pittman, Potts & Trowbridge Electric Division 2300 N Street, NW Public Service Commission of Wisconsin Washington, DC 20037-1128 P.O. Box 7854 Madison, Wisconsin 53707-7854 Mr. Richard R. Grigg President and Chief Operating Officer Wisconsin Electric Power Company 7 231 West Michigan Street Milwaukee, Wisconsin 53201 Mr. Mark E. Reddemann Site Vice President Point Beach Nuclear Plant Wisconsin Electric Power Company 6610 Nuclear Road Two Rivers, Wisconsin 54241 Mr. Ken Duveneck Town Chairman Town of Two Creeks 13017 State Highway 42 Mishicot, Wisconsin 54228  ;

1 Chairman  !

Public Service Co;nmission I of Wisconsin P.O. Box 7854 Madison, Wisconsin 53707-7854 Regional Administrator, Region til U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Resident inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, Wisconsin 54241 l

i October 1988 -

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