ML20054M166

Requests Addl Info Re SER Confirmatory Issues Concerning Reactor Coolant Pump Rotor Seizure & Loss of Offsite Power & Single Failure.Requests Confirmation That Effect of Single Failure Will Not Affect Offsite Dose Consequences

ML20054M166
Person / Time
Site:	Midland
Issue date:	06/25/1982
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
References
NUDOCS 8207120046
Download: ML20054M166 (3)

Text

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Mr. J. W. Cook Vice President Consuners Power Company 1945 West Parnall Road Jackson, fifchigan 49201

Subject:

Request for Additional Infornation on SER Confirmatory Issues:

RC Pump f!otor Seizure In reference to Confirmatory Issue 31 of SER Section 1.8 for flidland Plant, Units 1 and 2, Consurers Power Company has analyzed a locked rotor occurring during initial two pump operation as the bounding case for locked rotor accidents during partial punp operation. This calculation indicates that 27% of the fuel rods would experience DNB, but that the peak cladding tea:perature-would be 1100 F and no fuel danage would occur. flefore we can conclude our review of your conclusion that no fuel damage will occur, we require the following additional information:

a. Specify the design limits on cladding temperature, time duration, and/or degree of oxidation.

b. Provide justification of these limits based on test data.

c. Show that the ftidland fuel would not exceed these design linits using Cdlculational nethods that had been approved by NRC for this purpose.

As an alternate approach, you nay denonstrate that 27% failed fuel does not produce unacceptable offsite doses.

In addition to the above requests regarding partial punp operation, the SER requests Consumers Power Company to provide the additional information identified in Section 15.3.2 relating to loss of offsite power and single failure assumptions for the postulated locked rotor accident. You have stated that the assunption of loss of offsite power will not significantly inpact the D'S response; however, you have not confirned that the effect of a single failure, such as a stuck open secondary relief valve, will not significantly affect offsite dose consequences.

Please advise our project rianager of your proposed schedule for response within seven days of receipt of this letter.

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tir. J . W. Cook The reporting and/or.recordkeeping requirenents contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not requirert.

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\ Sincerely, Robert L. Tedesto, Assisi. ant Director for Licensing Division of Licensing cc: See next pace DISTRIBUTION Docket Nos.: 50-329/330 NRC PDR L PDR TERA NSIC LB#4 r/f EAdensam

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l e4ncronusiacino;eencuouo OFFiClAL RECORD COPY uscao- mi-us.wo

MIDLAND Mr. J. W. Cook Vice President ,

Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201 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, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan A8909 1 First National Plaza Chicago, Illinois 60603 William J. Scanlon, Esq.

2034 Pauline Boulevard James E. Brunner, Esq. Ann Arbor, Michigan 48103 Consumers Power Company 212 West Michigan Avenue U.S. Nuclear Regulatory Commission Jackson, Michigan 49201 Resident Inspectors Office Route 7 Ms. Mary Sinclair Midland, Michigan 48640 5711 Summerset Drive Midland, Michigan 48640 Ms. Barbara Stamiris 5795 N. River Stewart H. Freeman Freeland, Michigan 48623 Assistant Attorney General State of Michigan Environmental Mr. Paul A. Perry, Secretary Protection Division Consumers Power Company 720 Law Building 212 W. Michigan Avenue Lansing, Michigan 48913 Jackson, Michigan 49201 Mr. Wendell Marshall Mr. Walt Apley Route 10 c/o Mr. Max Clausen Midland, Michigan 48640 Battelle Pacific North West Labs (PNWL)

Battelle Blvd.

Mr. Roger W. Huston SIGMA IV Building Suite 220 Richland, Washington 99352 7910 Woodmont Avenue Bethesda, Maryland 20814 Mr. I. Charak, Manager NRC Assistance Project Mr. R. B. Borsum Argonne National Laboratory Nuclear Power Generation Division 9700 South Cass Avenue Babcock & Wilcox Argonne, Illinois 60439 7910 Woodmont Avenue, Suite 220 .

Bethesda, Maryland 20814 James G. Keppler, Regional Administrator U.S. Nuclear Regulatory Commission, Cherry & Flynn Region III Suite 3700 799 Roosevelt Road Three First National Plaza Glen Ellyn, Illinois 60137 Chicago, Illinois 60602 Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 55108