ML20154M259
| ML20154M259 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Arkansas Nuclear, Crystal River, Rancho Seco, Midland, Bellefonte, 05000000, Washington Public Power Supply System |
| Issue date: | 02/18/1986 |
| From: | Berkow H Office of Nuclear Reactor Regulation |
| To: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML20154M262 | List: |
| References | |
| GL-84-04, GL-84-4, NUDOCS 8603130435 | |
| Download: ML20154M259 (3) | |
Text
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[pgh" NUCLEAR REGULATORY COMMISSION UNITED ST ATEs O
E W ASHING TON D. C. 20555 February 18, 1986 Docket No. 50-330 Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201
Dear Mr. Cook:
SUBJECT:
SAFETY EVALUATION OF B&W OWNERS GROUP REPORTS DEALING WITH ELIMINATION OF POSTULATED PIPE BREAKS IN PWR PRIMARY MAIN LOOPS Re:
Midland Nuclear Plant, Unit No. 2 The NRC staff has reviewed the B&W Owners Group reports BAW-1847, Rev. 1, and BAW-1889P which apply " leak-before-break" technology as an alternative to designing against dynamic loads associated with postulated ruptures of primary coolant loop piping. As discussed in the enclosed letter to the B&W Owners Group, we have concluded that an acceptable technical basis has been provided to eliminate, as a design basis, the dynamic effects of large ruptures in the main loop piping of those E&W Owners Group facilities listed in the enclosure. Authorization by the NRC to not provide protection against the dynamic loads resulting from postulated breaks of primary main loop piping will require an exemption from General Design Criterion 4 (GOC 4).
Such exemptions must be justified on a facility specific basis.
Each request for an exemption should include a safety balance in accordance with the guidance provided in NRC Generic Letter 84-04, " Safety Eva!uation of Westinghouse Topical Reports Dealing With Elimination of Postulated Pipe Breaks in PWR Primary Main Loops," February 1,1984.
In addition, information for each facility should be submitted to demonstrate that leakage detection systems installed at the facility comply with Regulatory Guide 1.45.
Generic Letter 84-04 informed all operating PWR licensees, construction permit holders and applicants for construction permits of the staff's intent to proceed with rulemaking changes to GDC-4 to permit the use of analyses that demonstrate the probability of rupturing piping is extremely low under design basis conditions. On July 1, 1985, the Commission published a proposed modification to GDC-4 which would permit the use of such analyses for PWR primary coolant loop piping. The NRC staff is currently in the 9603130435 860210 PDR ADOCK 0500 0
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Mr. Cook process of final rulemaking. Promulgation of the final rule will eliminate the need for exemption requests and performance of safety balances; however, the requested information on leakage detection systems should be submitted.
Sincerely, "0MC3tU S!OI29 *"
Herbert N. Berkow, Director Standardization and Sper.ial Projects Directorate Division of PWR Licensing-B
Enclosure:
As Stated cc w/ enclosure:
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Mr. J. W. Cook Consumers Power Company Midland Nuclear Plant CC*
Michael I. Miller, Esq.
Mr. Don van Farrowe, Chief Ronald G. Zamarin, Esq.
Division of Radiological Health Alan S. Farnell, Esq.
Department of Public Health Isham, Linco.1p & Beale P. O. Box 33035 Three First national Pldza, Lansing, Michigan 48909 Sist floor Chicago, Illinois 60602 Mr. Steve Gadler 2120 Carter Avenue James E..Brunner, Esq.
St. Paul, Mirnesota 55108 Consumers Power Company 212 West, Michigan Avenue Ms. Barbara Stamiris Jackson, Michigan 49201 5795 N. River Ms. Mary Sfoc1hir
.s 5711 Sumerset Drive Mr. Tom McNish, Secretary Midland, Michigan 48640 Consumers Power Company 212 W. Michigan Avenue Stewart H. Freeman Jackson, Michigan 49201 Assistant Attorney General State of Michigan Environmental Mr. Walt Aoley Protection Division c/o Mr. Max Clausen 720 Law Buildina Battelle Pacific Northwest Labs Lansing, Michigan 48913 (PNWL)
SIGMA IV Building Mr. I. Charak, Manager Battelle Blvd.
NRC Assistance Project Richland, Washington 99352 Argonne National Laboratory 9700 South Cass Avenue Mr. R. B. Borsum Argonne, Illinois 60439 Nuclear Power Generation Division Babcock & Wijcox Regional Administrator, Region III 7910 Woodmont Avenue,' S'uite 220 U.S. Nuclear Regulatory Commission, Bethesda, Maryland 20814 799 Roosevelt Road Glen Ellyn, Illinois 60137 Cherry & Flynn Suite 3700 Ms. Julie Morrison Three First National Plaza Midland Daily News Chicago, Illinois 60602 124 Mcdonald Street Midland, Michigan 48640 Mr. Ron Callen Michigan Public Service Cc,nmission Billie Pirner Garde 6545 Mercantile Way Director, Citizens Clinic P. O. Box 30221 for Accountable Government Lansing, Michigan 48909 Government Accountability Project Institute for Policy Studies Mr. Howard Levin, Project Manager 1901 Oue Street, N.W.
TERA Corporation Washington, D. C.
20009 7101 Wisconsin Avenue Bethesda, Maryland 20814 Ms. Lynne Bernahei Government Accountability Project 1901 0 Street, N.W.
Washington, D.C.
20009