ST-HL-AE-1737, Forwards Nonproprietary WCAP-12257 & Proprietary WCAP-11256, Addl Info in Support of Elimination of Postulated Pipe Ruptures in Pressurizer Surge Lines of South Texas..., Per Request.Proprietary Rept Withheld (Ref 10CFR2.790)

Forwards Nonproprietary WCAP-12257 & Proprietary WCAP-11256, Addl Info in Support of Elimination of Postulated Pipe Ruptures in Pressurizer Surge Lines of South Texas..., Per Request.Proprietary Rept Withheld (Ref 10CFR2.790)

ML20206S407
Person / Time
Site:	South Texas
Issue date:	09/15/1986
From:	Wisenburg M HOUSTON LIGHTING & POWER CO.
To:	Noonan V Office of Nuclear Reactor Regulation
Shared Package
ML19292F908	List: ML20206S415 ML20206S430 ST-HL-AE-1737, Forwards Nonproprietary WCAP-12257 & Proprietary WCAP-11256, Addl Info in Support of Elimination of Postulated Pipe Ruptures in Pressurizer Surge Lines of South Texas..., Per Request.Proprietary Rept Withheld (Ref 10CFR2.790)
References
CON-#486-750 OL, ST-HL-AE-1737, NUDOCS 8609220203
Download: ML20206S407 (3)

Text

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The Light C O M M y iiousioni.ixiinx&ro n <, i .o. iu>x i7oo irousioo. icxos ,,ooi <7i3>22s.92ii September 15, 1986 ST-HL-AE-1737 File No.: G9.10 Mr. Vincent S. Noonan, Project Director PWR Project Directorate #5 ,

U. S. Nuclear Regulatory Commission Washington, DC 20555 South Texas Project Units 1 and 2 1 Docket Nos. STN 50-498, STN 50-499 Responses to NRC Request For Additional Information on Alternative Pipe Break Criteria -

Pressurizer Surge Line

References:

(1) HIAP letter to NRC, J. H. Goldberg to 11. R. Denton, March 12, 1986, ST-HL-AE-1617 (2) NRC letter to HIAP, N. P. Kadambi to J 11. Goldberg, July 10, 1986, ST-AE-HL-90935

Dear Mr. Noonan:

By letter dated March 12, 1986 (reference 1), Houston Lighting & Power Company (llL&P) provided the technical basis for the elimination of postulated pipe ruptures in the pressurizer surge line. The NRC staff has reviewed the information contained in our March 12, 1986 submittal and has submitted a request for additional information (reference 2).

In response to the NRC request for additional information, llL&P is enclosing five (5) copies of a proprietary report, WCAP-11256, " Additional Information in Support of the Elimination of Postulated Pipe Ruptures in the Pressurizer Surge Lines of the STP Units 1 and 2" as Attachment 1. Attachment 2 contains five (5) copies of a non-proprietary version (WCAP-11257) of the requested information.

While some of the responses provide requested information, others deal with technical issues. For the latter case, we feel we have addressed the items using state-of-the-art methodologies and have incorporated adequate conservatisms to assure that the requests for exemption to CDC-4 are justified. We would like to meet with the NRC Staff during the month of September, 1986 in order to facilitate the review.

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ST-HL-AE-1737 Houston Lighting & Pbwer Company File No.: G9.10 Page 2 The NRC also requested that Westinghouse Electric Corporation grant permission to release system parameters, margin numbers, specific system moments and forces, references to analytical methods, leak rates and reference crack sizes,_which have been designated as proprietary. This information must be included in the NRC's safety evaluation supporting the published conclusions. Westinghouse Electric Corporation has previously agreed to permit the Staff to. release certain information considered by Westinghouse to be proprietary. This permission was granted in a letter from Mr. E. P. Rahe, Jr. (Westinghouse) to Mr. D. G. Eisenhut (USNRC) dated November 15, 1984. A copy of the subject letter is provided as Attachment 3.

Because Attachment 1 contains information proprietary to Westinghouse Electric Corporation, the attached affidavit signed by Westinghouse management sets forth the basis on which the information may be withheld from public disclosure by the NRC in accordance with the requirements of 10CFR2.790(b)(1).

This affidavit addresses with specificity the considerations of 10CFR2.790(b)(4). Correspondence with respect to the proprietary aspects of the affidavit and Application for Withholding of Attachment 1 should reference CAW-86-068 and should be addressed to R. A. Wiesemann, Manager Regulatory and Legislature Affairs, Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania 15230.

If you should have any questions on this matter, please contact Mr. M. E. Powell at (713) 993-1328.

Very truly yours, M. R. sen Manager Nuclear L ensing MEP/bl Attachments: (1) WCAP-ll256, " Additional Information in Support of the Elimination of Postulated Pipe Ruptures in the Pressurizer Surge Lines of the STP Units 1 and 2," Westinghouse Proprietary Class 2, August 1986.

(Also enclosed is a Westinghouse authorization letter, (CAW-86-068), Proprietary Information Notice, and accompanying affidavit.)

(2) WCAP-11257, " Additional Information in Support of the Elimination of Postulated Pipe Ruptures in the Pressurizer Surge Lines of the STP Units 1 and 2," Westinghouse Proprietary Class 3, August 1986.

(3) Westinghouse letter to NRC, E. P. Rahe, Jr. to D. G.

Eisenhut, November 15, 1984 i

f l

Ll\NRC\ZV.

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Houston Lighting & Pbwer Company ST-HL-AE-1737:

0 File No.: C9.10 Page 3 cc:

1 Hugh L. Thompson, Jr. , Director Brian E. Berwick, Esquire Division of PWR Licensing - A- Assistant Attorney General for Office of Nuclear Reactor Regulation the State of Texas J U.S.-Nuclear Regulatory Commission P.O. Box 12548, Capitol Station Washington, DC 20555 Austin, TX 78711 Robert D. Martin Lanny A. Sinkin Regional Administrator, Region IV Christic Institute Nuclear Regulatory Commission 1324 North Capitol Street 611 Ryan Plaza Drive, Suite 1000 Washington, D.C. 20002

Arlington, TX 76011 Orerte R. Pirfo, Esquire

(*)N. Prasad Kadambi, Project Manager Hearing Attorney i U.S. Nuclear Regulatory Commission Office of the Executive Legal Director

7920 Norfolk Avenue U.S. Nuclear Regulatory Commission

! Bethesda, MD 20814 Washington, DC 20555 Claude E. Johnson Charles Bechhoefer, Esquire Senior Resident Inspector /STP Chairman, Atomic Safety &

c/o.U.S. Nuclear Regulatory Licensing Board Commission U.S. Nuclear Regulatory Commission P.O. Box 910 -

Washington, DC 20555

, Bay City, TX 77414

. Dr. James C. Lamb, III 1

M.D. Schwarz, Jr., Esquire 313 Woodhaven Road.

- Baker & Botts -

Chapel Hill, NC 27514 One Shell Plaza Houston, TX 77002 Judge Frederick J. Shon Atomic Safety and Licensing Board j J.R. Newman, Esquire U.S. Nuclear Regulatory Commission l Newman & Holtzinger, P.C. Washington, DC 20555 1615 L-Street, N.W.

. Washington, DC 20036 Citizens for Equitable. Utilities, Inc.

c/o Ms. Peggy Buchorn Director, Office of Inspection Route 1, Box 1684 and Enforcement Brazoria, TX 77422

U.S. Nuclear Regulatory Commission j Washington, DC 20555 (*) Docketing & Service Section i Office of the Secretary 1 T.V. Shockley/R.L. Range U.S. Nuclear Regulatory Commission

! Central Power & Light Company Washington, DC 20555 i' P.O. Box 2121 (3 Copies)

Corpus Christi, TX 78403 Advisory Committee on Reactor Safeguards i H.L. Peterson/C. Poko'rny U.S. Nuclear Regulatory Commission

City of Austin 1717 H Street

P.O. Box 1088 Washington, DC 20555 Austin, TX 78767

] J.B. Poston/A. vonRosenberg City Public Service Board P.O. Box 1771 San Antonio, TX 78296

(*) Attachments 1 through 3. All others without Attachment 1 and 2.

Ll\NRC\ZV. Revised 5/22/86

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