ML20210R162

Forwards Safety Evaluations Supporting Util 850517,0802, 0823,1211 & 860429 Submittals Re Environ Effects of High Energy Line Breaks in Auxiliary Steam & Steam Generator Blowdown Sys.Design of Blowdown Sys Acceptable

ML20210R162
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	02/06/1987
From:	Varga S Office of Nuclear Reactor Regulation
To:	Farrar D COMMONWEALTH EDISON CO.
Shared Package
ML20210R166	List: ML20210R162 ML20210R206 ML20210T257
References
NUDOCS 8702170337
Download: ML20210R162 (4)

Text

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February 6, 1987

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DISTRIBUIT0N .

Docket Nos. 50-454, 50-455, and N j J. Partlow 50-456, 50-457- NRCPDR N. Thompson Local PDR- B. Grimes PD#3 Rdg. C. Vogan T. Novak L.'01shan OGC J. Stevens Mr. Dennis L. Farrar E. Jordan ACRS(10)

-Director of Nuclear Licensing Comonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

SUBJECT:

HIGH ENERGY LINE BREAKS-IN THE AUXILIARY STEAM AND STEAM GENERATOR BLOWDOWN SYSTEMS - BYRON /BRAIDWOOD By letter dated May 17, 1985, you advised us that_ postulated high energy line breaks in either the Auxiliary-Steam (AS). System or the Steam Generator Blowdown (SD) System at Byron /Braidwood would have a greater effect on environmental con-ditions than originally predicted. By letter dated August 2, 1985, you described modifications that would mitigate the effects of these breaks. Subsequent letters dated August 23, 1985, December 11, 1985 and April 29, 1986 provided additional information. We have completed our review and conclude that the designs of the AS and SD systems for protection against postulated piping failures in the Auxiliary I- Building are acceptable and meet the requirements of GDC-4 with respect to accommodating the effects of postulated pipe ruptures.

Enclosure 1 is our Safety Evaluation of the systems aspects of the design.

Enclosure 2 is our Safety Evaluation of the. electrical aspects of the design.

Sincerely, Steven A. Varga, Director Project Directorate #3 Division of PWR Licensing-A i

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Enclosures:

l As stated cc: See next page

• SEE PREVIOUS CONCURRENCE PD#3 PD#3 PD#3 - P CVogan* L01shan:mak* JStev ns ga 2/4/87 2/4/87 2/5/87 /87 l

8702170337 DR 870206 ADOCK 05000454 PDR l I

DISTRIBUITON l

' Docket Nos. 50-454, 50-455, and Docket File J..Partlow l 50-456, 50-457 NRCPDR N. Thompson i Local PDR B. Grimes f-PD#3 Rdg. C.Vogan/

T. Novak L. Ols n 0GC J. vens-Mr. Dennis L. Farrar E. Jordan AC 10)

Director of Nuclear Licensing I Comonwealth Edison Company  !

Post Office Box 767 l Chicago, Illinois 60690

SUBJECT:

HIGH ENERGY LINE BREAKS IN THE AUXILIARY EAM AND STEAM GENERATOR BLOWDOWN SYSTEMS - BYRON /BRAI 00D l

By letter dated May 17, 1985, you advised us at postulated high energy line breaks in either the Auxiliary Steam (AS) S tem or the Steam Generator Blowdown System (SD) at Byron /Braidwood would have greater effect on environmental con- I ditions than originally predicted. By 1 ter dated August 2,1985, you described modifications that would mitigate the e fects of these breaks. Subsequent letters dated August 23, 1985, December 11, 1 5 and April 29, 1986 provided additional information. We have completed our eview and conclude that the designs of the l AS and SD systems for protection a inst postulated piping failures in the Auxiliary i Building are acceptable and meet e requirements of GDC-4 with respect to j accommodating the effects of pos lated pipe ruptures, i I

l Enclosure 1 is our Safety Eval ation of the systems aspects of the design I I Enclosure 2 is our Safety Ev uation of the electrical aspects of the design. I You are requested to submit echnical Specifications for this system for Byron Station, Units 1 and 2.

Sincerely,  !

Steven A. Varga, Director l Project Directorate #3 Division of PWR Licensing-A

Enclosures:

j' As stated j cc: Seenext/hage l

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PD#3 y / _@PD#3 PD#3 PD#3 CVogan -

7L' L01shan:mak JStevens SVarga 2/g/87/ 2/4/87 2/ /87 2/ /87 L

Mr. Dennis L. Farrar

. Commonwealth Edison Company Ryron/Braidwood 1 CC*

Mr. William Kortier Dr. Bruce von Zellen i Atomic Power Distribution Department of Biolooical Sciences Westinghouse Electric Corporation Northern Illinois University Pcst Office Box 355 DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Joseph Gallo, Esq. U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1150 Connecticut Ave., N.W. 4448 German Church Road Suite 1100 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, Illinois 61107 2503 S. Neil Champaign, Illinois 61820 Doualass 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 Li:ensing Division David C. Thomas, Esq.

Sargent & Lundy Engineers 77 S. Wacker Drive 55 East Monroe Street Chicago, Illinois 60601 Chicago, Illinois 60603 Elena Z. Kerelis, Esq.

U. S. Nuclear Pegulatory Commission Isham, Lincoln & Beale Resident Inspectors Office Three First National Plaza RRA1, Box 79 Suite 5200 Braceville, Illinois 60407 Chicago, Illinois 60602 l

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Byron /Braidwood cc:

Regional Administrator U.' S. NRC, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Pr. Charles D. Jones Director Illinois Emergency Services and Disaster Agency 110 East Adams Street Springfield, Illinois 62706 Ms. Lorraine Creek Rt.' 1, Fox 182 Manteno, Illinois 60950 Mr. Michael C. Parker, Chief Division of Engineering Illinois Department of Nuclear Safety 1035 Outer Park Drive Springfield, Illinois 62704 Michael Miller Isham, Lincoln A Beale One First National Plaza 42nd Floor Chicago, Illinois 60603 George L. Edgar Newman & Holtzinoer, P.C.

1615 L Street, N.W.

Washington, D.C. 20036 l

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