ML20126C112

Approves Request That WCAP-10553, Technical Bases for Eliminating Large Primary Loop Pipe Rupture as Structural Design Basis for Byron Units 1 & 2 & Braidwood Units 1 & 2, Be Withheld (Ref 10CFR2.790)

ML20126C112
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	06/10/1985
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	Wiesemann R WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
References
NUDOCS 8506140317
Download: ML20126C112 (4)

Text

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Mr. Robert A. Wiesemann ,WN 10185 You stated that the submitted information should be considered exempt from i mandatory public disclosure for the following reasons:

The use of infomation developed by Westinghouse gives Westing-house a competitive advantage over its competitors. It is, therefore, withheld from disclosure to protect the Westinghouse competitive position. The information is marketable in many ways and the extent to which it is available to competitors diminishes the Westinghouse ability to sell products and services involving the use of the information. Use of the information by a competitior would put Westinghouse at a competitive disadvantage by reducing the expenditure of resources at Westinghouse expense.

We have reviewed your application and the material based on the requirements and criteria of 10 CFR 2.790 and, on the basis of Westinghouse and Comonwealth

Edison Company statements, have detemined that the submitted infomation sought

{ to be withheld contains trade secrets or proprietary comercial information.

We have determined that WCAP-10553, " Technical Bases for Eliminating Large Primary Loop Pipe Rupture as the Structural Design Basis for Byron Units 1 and 2 and Braidwood Units 1 and 2," marked as proprietary, should be withheld from i public disclosure pursuant to 10 CFR 2.790(b)(5) and Section 103(b) of the Atomic '

Energy Act of 1954, as amended.

We, therefore, approve your request for withholding pursuant to 10 CFR 2.790 and are withholding WCAP-10553 " Technical Bases for Eliminating Large Primary

Loop Pipe Rupture as the Structural Design Basis for Byron Units 1 and 2 and

! Braidwood Units 1 and 2," from public inspection as proprietary, except as

{ noted in paragraph 2 of page 1.

I Withholding from public inspection shall not affect the right, if any, of persons properly and directly concerned to inspect the documents. If the need arises, we may send copies of this information to our consultants working in this area. We will, of course, insure that the consultants have signed the appropriate agreements for handling proprietary information.

If the basis for withholding this information from public inspection should '

change in the future such that the information could then be made available for public inspection, you should promptly notify the NRC. You should also 3

understand that the NRC may have cause to review this determination in the

future, such as if the scope of a Freedom of Information Act request includes

your information. In all review situations, if the NRC needs additional

, infomation from you or makes a detemination adverse to the above, you will

be notified in advance of any public disclosure.

I Sincerely, l 8506140317 B506 54 Am 0 B. J. Youngblood, Chief j

l fR PDR Licensing Branch No. 1 Division of Licensing cc: See next page

• SEE PREVIOUS CONCURRENCES 1

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j NUCLE AR REGULATORY COMMISSION WASHINGTON, D. C. 20655

,/ JUN 101985 Docket Nos.: STN 50-454, STN 50-455 and- STN 50-456, STN 50-457 i

Mr. Robert A. Wiesemann, Manager

- Regulatory & Legislative Affairs Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 j

Subject:

Withholding from Public Disclosure - CAW-84 44I - WCAP-10553 and

., WCAP-10554 " Technical Bases for Eliminating Large Primary Loop Pipe Rupture as the Structural Design Basis for Byron Units 1 l

, and 2 and Braidwood Units 1 and 2"  ;

By your application and affidavit, dated June 1, 1984 and September 26, 1983, respectively, the proprietary version (WCAP-10553) and the non-proprietary version (WCAP-10554) of the report entitled " Technical Bases for Eliminating Large Primary Loop Pipe Rupture as the Structural Design Basis for Byron Units 1 and 2 and Braidwood Units 1 and 2," were transmitted by Commonwealth Edison Company letter, dated September 17, 1984. You requested that WCAP-10553, the proprietary version of this report be withheld from public disclosure pursuant to 10 CFR 2.790.

Discussions among Westinghouse and NRC technical / legal staffs regarding the release of infonnation considered by Westinghouse to be proprietary have

, resulted in Westinghouse agreeing to pennit the NRC staff to release infor-mation concerning mechanistic fracture mechanics analyses of RCS primary loop piping and large Class 1 piping attached to the RCS. The information which ,

Westinghouse agreed to release as stated in a letter to Darrell G. Eisenhut, dated November 15, 1984 is as follows-l

1. Plant parameters (operating temperatures, operating pressures, i

pipe dimensions)

2. Margin numbers (e.g., a factor of ,10 on a specific criteria)

3. Specific plant moments and forces

. 4. Reference to the analytical methods used (i.e., limit load) f

5. Leak rates

6. Reference crack size The informatien will be released in the staff Safety Evaluation or a Supplement

- thereto. Other than the items indicated above the report is considered to be proprietary.

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BYRON /BRAIDWOOD Mr. Dennis L. Farrar Director of Nuclear Licensing Comonwealth Edison Company Post Effice Box 767 Chicago, Illinois 60690 cc: Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution Department of Biological Sciences Westinghouse Electric Corporation Northern Illinois University Post Office Box 355 DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Mr. Julian Hinds Joseph Gallo, Esq. V. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1120 Connecticut Ave., N. W. 4448 Gennan Church Road Suite 840 Byron, Illinois 61010 .

Washington, D. C. 20036 Ns. Diane Chavez C. Allen Bock, Esquire 528 Gregory Street Post Office Box 342 Rockford, Illinois 61108 Urbana, Illinois 61801 Mrs. Phillip B. Johnson Thomas J. Gordon, Esquire 1907 Stratford Lane Waaler, Evans & Gordon Rockford, Illinois 61107 2503 S. Neil Champaign, Illinois 61820 Douglass Cassel, Esq.

109 N. Dearborn Street Ms. Bridget Little Rorem Suite 1300 Appleseed Coordinator Chicago, Illinois 60602 117 North Linden Street Essex, Illinois 60935 Ms. Pat Morrison 5568 Thunderidge Drive Mr. Edward R. Crass Rockford, Illinois 61107 Nuclear Safeguards and Licensing Division David C. Thomas Esq.

Sargent & Lundy Engineers 77 S. Wacker Drive 55 East Monroe Street Chicago, Illinois 60601 Chicago, Illinois 60603 Rebecca J. Lauer, Esq.

U. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Resident Inspectors Office Three First National Plaza RR#1, Box 79 Suite 5200 Braceville, Illinois 60407 Chicago, Illinois 60602

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' PRC System

.NSIC Local PDR

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