ML19225A390

Responds to IE Bulletin 79-07 Re Use of Particular Computer Programs.Superpipe Used on All Piping Analyses Except Analysis Performed by Westinghouse

ML19225A390
Person / Time
Site:	Catawba
Issue date:	05/29/1979
From:	Dail L DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 7907190122
Download: ML19225A390 (2)

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DUKE POWER COMPANY

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ELECTHIC CENTER BOX 33180. CII AnLorrc N. C. 2a242 o,!' ,*,'. ".'.! $L.

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.x Mr. J. P. O'Reilly, Director T pQ U. S. Nuclear Regulatory Comission **

J, 101 Marietta Street, Suite 3100 ~L Atlanta, Georgia 30303 ." {,

Re: Catawba Nuclear Station Docket Nos.: 50-413 and 50-414 IE Bulletin: 79-07 Duke File: CN-1412.ll-1

Dear Mr. O'Reilly:

Enclosed is Duke Power's response to IE Bulletin 79-07.

Very truly yours,

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L. C. Dail Vice President Design Engineering JDW/jmi Attachment

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cc: Nuclear Regulatory Commission , ,

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Office of Inspection and Enforcement 7, "J

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Division of Reactor Operations Inspection Washington, D. C. 20555

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DUKE'S RESPONSE TO IE BULLETIN 79-07 FOR CATAWBA NUCLEAR STATION Nith respect to items (1), (2), and (4) of the subject bulletin. we respond as follows:

The EDS Nuclear, Inc. computer program, SUPERPIPE, is being used on all piping analysis s. sept that analysis performed by the NSSS contractor, Westinghouse. Westinghouse is using their program WESTDYNE-7 on the analysis pcrformed by them. Both EDS Nuclear, Inc. and Westinghouse have confirmed that algebraic summation techniques for combining re-sponses were not used.

In answer to paragraph (3) of I.E. Bulletin No. 79-07, the verification of computer programs was done in a combination of ways. Due to the non-existence of the ASME benchmark problems during the time of the original analyses, original versions of programs were verified with hand calculated results. As more and more programs became comercially available, comparisons were made with these programs and with the ASME problems.

Specifically, EDS Nuclear, Inc. used a combination of any or all of the following methods:

1. Comparison to ASME Benchmark Problem #1

2. Benchmark Problems Utilizing EDS Programs and Other Industry Programs (PIPESD, NUPIPE, ME-101)

3. Comparison to Hand Calculations

4. Comparison Between EDS Programs and Updated Versions The computer code used by Westinghouse, WESTDYNE-7, and the comparison of this program with benchmark problems are contained in the topical report WCAP-8252.

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