ML20205F119

Grants 840917 Request for Schedular Exemption from Portion of GDC 4 of 10CFR50,App a Re Need to Analyze Large Primary Loop Pipe Ruptures as Structural Design Basis.Exemption Becomes Effective on Issuance Date

ML20205F119
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	10/28/1985
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	Farrar D COMMONWEALTH EDISON CO.
Shared Package
ML20205E877	List: ML20205E874 ML20205E879 ML20205F119 ML20205F126
References
NUDOCS 8511040476
Download: ML20205F119 (4)

Text

. . . . . ...

l9 s s

1. UNITED STATES

! ,, g NUCLEAR REGULATORY COMMISSION

WASHINGTON, D. C. 20555 r., c

• % .V..../ OCT 2 s 1385 Docket Nos.: STN 50-455, STN 50-456, and STN 50-457 '

i 1

.i Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690 2

Dear Mr. Farrar:

q'

Subject:

Request for Schedular Exemption from a Portion of General Design Criterion 4 of Appendix A to 10 CFR Part 50 Regarding i the Need to Analyze Large Primary Loop Pipe Ruptures as the i Structural Design Basis for Byron Station, Unit 2, and Braidwood Station, Units 1 and 2 In a letter dated September 17, 1984 Coninonwealth Edison Company (CECO) requested an exemption from a portion of the requirements of General Design

. Criterion (GDC) 4 of Appendix A to 10 CFR Part 50. You provided the Westing-house report " Technical Bases for Eliminating Large Primary Lonp Pipe Rupture i as a Structural Design Basis for Byron Units 1 and 2 and Braidwood linits 1 i . . and 2, " WCAP-10554 (Westinghouse Non-Proprietary) and WCAP-10553 (We.stinghouse Proprietary) as an enclosure to this letter which serves as the technical basis in support of the request. The Westinghouse report addresses the

" leak-before-break" concept as an alternative to providing protective devices against the dynamic effect of postulated ruptures in the primary coolant loops.

Your submittal dated June 28, 1985 provided a value-impact analysis associated with your exemption request and requested that a partial exemption to GDC-4 be granted for the first two cycles of operation for Byron Station, Units 1 and 2, and Braidwood Station, Units 1 and 2 (the facilities). Your letter

dated August 14, 1985 withdrew, without prejudice, the request for the exemption for Byron Station, Unit 1.

i 9511040476 851020 PDR ADOCK 05000455 A PDR

~ '

~

t'r. Dennis L. Farrar .

On the basis of the staff's evaluation of these submittals the Commission h'as granted your exemption request for periods ending at the completion of the second refueling outage of each of the facilities, pending the outcome of the Commission's ongoing rulemaking on this subject. The staff has also received

! your September 25, 1985 letter requesting amendments to the construction per-I mits for Byron Statien, Unit 2, and Braidwood Station, Units 1 and 2. The exemption granted will become effective upon the date of issuance. The enclosed exemption is being forwarded to the Office of the Federal Register for publication, accordingly.

Sincerely,

.forB.J.Youngblood, Chief Licensing Branch No. 1 Division of Licensing

Enclosures:

As stated cc: See next page e

n

F-- . .

~

Mr. Dennis L. Farrar Commonwealth Edison Company Byron /Braidwood

~

I CC: i Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution '

Department of Biological Sciences Westinghouse Electric Corpcration Northern Illinois University

. Post Office Box 355 DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Joseph Gallo, Esq. '

U. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1120 Connecticut Ave., N. W. 4448 German Church Road Suite 840 Byron, Illinois 61010 Washington, D. C. 20036 Ms. 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, Illinoir 61107 2503 S. Neil l 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 Commission Isham, Lincoln & Beale Resident Inspectors Office Three First National Plaza RRfl Box 79 Suite 5200 Braceville, Illinois 60407 Chicago, Illinois 60602

. . <s

~

Byron /Braidwood cc:

Regional Administrator

! U. S. NRC, Region III

, 799 Roosevelt Road j Glen Ellyn, Illinois 60137 -

Erie Jones, Director

), ~

Illinois Emergency Services and Disaster Agency 110 East Adams Springfield, Illinois 62705 Ms. Lorraine Creek Rt. 1, Box 182 Manteno, Illinois 60950 1 Mr. Michael C. Parker, Chief

Division of Engineering j Illinois Department of

, Nuclear Safety 1 1035 Outer Park Drive q Spri..gfield, Illinois 62704 Michdol Miller Isham, Lincoln & Beale One First National Plaza 42nd Floor Chicago, Illinois 60603 i Jane M. Whicher, Esq.

, . 109 N. Dearborn Street Chicago, Illinois 60602 4

1.