ML20125D050

Informs That Licensee Response to GL 90-06, Resolution of Generic Issue 70, 'Power-Operated Relief Valve & Block Valve Reliability' & GI 94, 'Addl Low-Temp Overpressure Protection for Lwrs,' Per 10CFR50.54(F), Acceptable

ML20125D050
Person / Time
Site:	Byron, Braidwood, Zion  File:ZionSolutions icon.png
Issue date:	12/05/1992
From:	Pulsifer R Office of Nuclear Reactor Regulation
To:	Kovach T COMMONWEALTH EDISON CO.
References
REF-GTECI-070, REF-GTECI-094, REF-GTECI-NI, TASK-070, TASK-094, TASK-70, TASK-94, TASK-OR GL-90-06, GL-90-6, TAC-M77332, TAC-M77333, TAC-M77334, TAC-M77335, TAC-M77397, TAC-M77398, NUDOCS 9212140245
Download: ML20125D050 (4)

Text

.. ._ .- _

, December C, 1992 s

Docket Nos. 51N 50-454, SIN 50-455 QlSTRIBUTION Docket'Filen SIN 50-456, STN 50-457 NRC & Local PDRs PD32 r/f and 50-295, 50-304 JRoe TKing JDyer CMoore(3)

Mr. Thomas J. Kovach RPulsifer JHickman Nuclear Licensing Manager CShiraki JNorberg Commonwealth Edison Company-Suit e 300 OGC ACRS(10)

OPUS West III BClayton, Rlll PD32 p/f 1400 OPUS Place DPickett Downers Grove, IL 60515

SUBJECT:

STAFF REVIEW 0F GEICRIC LETTER 90-06, " RESOLUTION OF GENERIC 1SSOE 70, ' POWER-0PERATED REllEF VALVE AND BLOCK VALVE RELIABILITY,' AND GENERIC ISSVE 94, ' ADDITIONAL LOW-TEMPERATURE OVERPRESSURE PROTECTION FOR LIGHT-WATER REACTORS,' PURSUANT T0 10 CFR 50.54(F)" (TAC N05. M77332, M77333, M77334, M77335, H77397 AND M77398)

By letter dated December 6, 1990, Commonwealth Edison Company (CECO) responded to Generic Letter (GL) 90-06. The generic letter represented the technical resolution of two generic issues and included plant backfits which were cost-justified safety enhancements. Generic Issue 70 included upgrades in quality requirements, inservice testing requirements, and modified technical specifications for all pressurized water reactor facilities that incorporate power operated relief valves (PORVs) and block valves in their design. The intended purpose was to enhance the overall reliability of the PORVs and block valves so that they could better perform the safety functions identified in the generic letter. Generic Issue 94 included modified technical specifications for all Westinghouse and Combustion Engineering facilities to reduce the allowed outage time for an inoperable low temperature overpressure protection (LTOP) channel and, thus, reduce the probability of overpressurization events during shutdown conditions. ,

The staff has reviewed your submittal and finds that your clarification provided by letter dated October 9, 1992~, demonstrates that these facilities are bounded by the regulatory analysis that accompanied the generic letter and is acceptable.

Sincerely, '

mi e a Odpu! SigrwJ By:

Robert M. Pulsifer, Project Manager Project Directorate 111-2 Division of Reactor Projects lil/IV/V Office of Nuclear Reactor Regulation i

cc: See next page '

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I December 5, 1992 Docket File Docket Nos. STN 50-454, STN 50-455 QLJTEIM11Q!i S1N 50-456, STN 50-457 NRC & Local PDRs PD32 r/f and 50-295, 50-304 JRoe TKing JDyer CMoore(3)

Mr. Thomas J. Kovach RPulsifer JHickman Nuclear Licensing Manager CShiraki JNorberg Commonwealth Edison Company-Suite 300 OGC ACRS(10)

OPUS West 111 BCicyton, Rlll PD32 p/f 1400 OPUS Place DPickett Downers Grove, IL 60515

SUBJECT:

STAFF REVIEW 0F GENERIC LETTER 90-06, " RESOLUTION OF GENERIC ISSUE 70, ' POWER-0PERATED RELIEF VALVE AND BLOCK VALVE REllABILITY,' AND GENERIC ISSUE 94, ' ADDITIONAL LOW-TEMPERATURE OVERPRESSURE PROTECTION FOR LIGHT-WATEP REACTORS,' PURSUANT T0 10 CFR 50.54(F)" (TAC NOS. M77332, M77333, M77334, M77335, M77397

AND M77398) l By letter dated December 6,1990, Commonwealth Edison Company (Ceco) responded to Generic Letter (GL) 90-06. The generic letter represented the technical resolution of two generic issues and included plant backfits which were cost-l justified safety enhancements. Generic issue 70 included upgrades in quality i requirements, inservice testing requirements, and modified technical specifications for all pressurized water reactor facilities that incorporate power operated relief valves (PORVs) and block valves in their design. The l intended purpose was to enhance the overall reliability of the PORVs and block I valves so that they could better perform the safety functions identified in l

the generic letter. Generic issue 94 included modified technical specifications for all Westinghouse and Combustion Engineering facilities to reduce the allowed outage time for an inoperable low temperature overpressure I

protection (LTOP) channel and, thus, reduce the probability of l overpressurization events during shutdown conditions.

The staff has reviewed your submittal and finds that your clarification provided by letter dated October 9, 1992, demonstrates that these facilities are bounded by the regulatory analysis that accompanied the generic letter and-is acceptable.

Sincerely,

! OJ#alSigned Br.

I Robert M. Pulsifer, Project Manager Project Directorate 111-2 Division of Reactor Pro.iects Ill/IV/V Office of Nuclear Reactor Regulation cc: See next page

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CfL/92 V /p/92 #/,sf/92 \\ 4 5 /92 /A/ 4/92 /2./5 /92 Nf

-Mr. Thomas J. Kovach Byron /Braidwood Power Stations a

Commonwealth Edison company cc:

6 Mr. William P. Poirier U. S. Nuclear Regulatory Commission

• Westinghouse Electric Corporation Byron / Resident Inspectors Office Energy Systems Business Unit 4448 North German Church Road Post Office Box 355, Bay 236 West Byron, Illinois 61010 Pittsburgh, Pennsylvania lb230 Ms. Lorraine Creek Joseph Gallo, Esquire Rt. 1, Box 182 Hopkins and Satter Manteno, Illinois 60950 888 16th Street, N.W., Suite 700 Washington, D.C. 20006 Mrs. Phillip B. Johnson 1907 Stratford Lane Regional Administrator Rockford, Illinois 6)l07 U. S. NRC, Region ill 799 Roosevelt Road, Bldg. #4 Douglass Cassel, Esquire Glen Ellyn, Illinois 60137 17 East Monroe Street, Suite 212 Chicago, Illinois 60603 Ms. Bridget Little Rorem Appleseed Coordinator Michae's Miller, Esquire 117 North Linden Street Sidley and Austin Essex, Illinois 60935 One First National Plaza Chicago, Illinois 60690 Mr. Edward R. Crass Nuclear Safeguards and Licensing George L. Edgar Division Newman & Holtzinger, P.C. '

Sargent & Lundy Engineers 1615 L Street, N.W.

55 East Monroe Street Washington, D.C. 20036 Chicago, Illinois 60603 Commonwealth Edison Company U. S. Nuclear Regulatory Commission Byron Station Manager Resident inspectors Office 4450 North German Church Road Rural Route #1, Box 79 Byron, Illinois 61010 Braceville, Illinois 60407 Illinois Dept. of Nuclear Safety Mr. Ron Stephens Office of Nuclear Facility Safety 111inois Emergency Services 1035 Outer Park Drive and Disaster Agency Springfield, Illinois 62704 110 East Adams Street Springfield, Illinois 62706 Commonwealth Edison Company

• Braidwood Station Manager Robert Neumann Rt. 1, Box 84 Office of Public Counsel Braceville, Illinois 60407 State of Illinois Center 100 W. Randolph, Suite 11-300 Chairman, Ogle County Board <

Chicago, Illinois 60601 Post Office Box 357 Oregon, Illinois 61061 EIS Review Coordinator Environmental Protection Agency Chairman Region V Will County Board of Supervisors 230 S. Dearborn Street Will County Board Courthouse Chicago, Illinois 60604 Joliet, Illinois 60434 Attorney General 500 South 2nd Street Springfield, Illinois 62701

Mr. Thomas J. Kovach Zion Nuclear Power Station o

, Commonwealth Edison Company Unit Nos. I and 2 C cc:

1 Michael 1. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Dr. Cecil Lue-Hing Director of Research and Development Metropolitan Sanitary District of Greater Chicago 100 East Erie Street Chicago, Illinois 60611 Phillip Steptoe Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Mayor of Zion Zion, Illinois 60099 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive .

Springfield, Illinois 62704 U. S. Nuclear Regulatory Commission Resident inspectors Office 105 Shiloh Blvd.

Zion, Illinois 60099 Regional Administrator, Region 111 U. S. Nuclear Regulatory Commission 799 Roosevelt Road, Bldg. #4 Glen Ellyn, lilinois 60137 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 '

Chicago, Illinois 60601 w - , -m e - e -+r a-w..