ML20137L019

Forwards Proprietary & Nonproprietary Supplementary Info to WCAP-10585, Technical Bases for Eliminating Large Primary Loop Pipe Rupture on Structural Design Basis for McGuire Units 1 & 2. Proprietary Info Withheld (Ref 10CFR2.790)

ML20137L019
Person / Time
Site:	Mcguire, McGuire
Issue date:	01/16/1986
From:	Tucker H DUKE POWER CO.
To:	Adensam E, Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML19273A741	List: ML20137L019 ML20137L039 ML20137L059
References
TAC-59660, TAC-59661, NUDOCS 8601240328
Download: ML20137L019 (3)

Text

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m. .. m go4) am-4s:n mu -- January 16, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 tion: Ms. E.G. Adensam, Chief Licensing Branch No. 4

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Subject:

McGuire Nuclear Station Docket Nos. 50-369 and 50-370 Pipe Break Criteria Relief for Reactor Coolant Loop

Dear Mr. Denton:

My letter of August 30, 1985 submitted a request for an exemption (pursuant to 10 CFR 50.12(a)) from General Design Criteria 4 to apply the " leak-before-break" concept to the McGuire Nuclear Station to eliminate postulated pipe breaks in the RCS Primary Loop from the plant structural design basis. Included in this sub-mittal was the Westinghouse Technical Report (WCAP-10585) entitled " Technical Basis for Eliminating Large Primary Loop Pipe Rupture as the Structural Design Basis for McGuire Units 1 & 2" which provided technical justification for eli-mination of RCS Primary Loop breaks for McGuire. A non-proprietary version of the Specific Plant Applicability Report (WCAP-10584) was also provided.

Pursuant to NRC staff request, please find attached for NRC review supplemen-tary information to WCAP-10585 pertaining to the Westinghouse f ract ure mechanics analysis used in the primary loop leak-before-break submittal. This supplementary information provides clarifications as to the determination of J and method of margin analysis. Asthiscontainsinformationproprietary(WeEEkhouse #

proprietary class 2) to Westinghouse Electric Corporation, also attached are a proprietary information notice, application for withholding (with accompanying Westinghouse authorization letter CAW-85-084, non-proprietary), and the support-ing affidavit signed by Westinghouse, the owner of the information. The affi-davit sets forth the basis on which the information may be withheld from public disclosure by the Commission and addresses with specificity the considerations listed in paragraph (b)(4) of Section 2.790 of the Commission's regulations.

Accordingly, it is respectfully requested that the information which is proprie-tary to Westinghouse be withheld from public disclosure in accordance with 10 CFR Section 2.790 of the Commission's regulations. Correspondence with respect to the proprietary aspects of the Applicaticn for Withholding or the supporting Westinghouse affidavit should reference (AW-85-084 and should be addressed to R. A. Wiesemann, Manager, Regulatory & Legislative Af fairs, Westinghouse Electric Corporation, P.O. Box 355. Pittsburgh, Pennsylvania 15230. A non-proprietary (Westinghouse proprietary class 3) version of the supplementary information is also attached. ,

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H.R. Denton January 16, 1986 Page 2 Should there be further questions concerning this exemption request, please advise.

Very truly yours,

b. lh Hal B. Tucker PBN/jgm Attachments xc: Dr. J. Nelson Grace, Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 -

Mr. Darl Hood Division of Project Management Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. W.T. Orders Senior Resident Inspector McGuire Nuclear Station l

PROPRIETART INFORMATION NOTICE

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