ML20003G438

Advises Re Inadequacy of Util Seismic re-evaluation Program, Submitted on 801010 & 810109.Program Must Be Resubmitted within 30 Days to Include Sys Required for Safe Shutdown & Mitigation of DBE

ML20003G438
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	04/24/1981
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
References
TASK-03-06, TASK-3-6, TASK-RR LSO5-81-04-042, LSO5-81-4-42, NUDOCS 8104290417
Download: ML20003G438 (5)

Text

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NUCLEAR REGULATORY COMMISSION g

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April 24,1981

• • • s' Oocket No. 50-155 LS05 04-042 m

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Mr. David P. Hoffman pg88.1984 g Nuclear Licensing Administrator e-;

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SUBJECT:

SEP TOPIC III-6, SEISMIC DESIGN CONSIDERATIONS BIG ROCK POI 4lT -

Our letter to you dated August 4,1980 requested in accordance with 10 CFR 50.54(f) of the Comission's regulations that you submit plans and proceed with a seismic reevaluation program for the Big Rock Point facility and that you provide justification for your conclusion that continued operation is justified in the interim until the seismic re-evaluation program is co@lete. We have reviewed your seismic reevaluation program forwarded by your letters dated October 10, 1980 and January 09, 1981. We have determined that your program is deficient with respect to scope of structures, systems and co@onents to be evaluated.

Our August 4,198010 CFR 50.54(f) letter specified as a mininum, that your program should provide for an evaluation of:

1.

The integrity of the reactor coolant pressure boundan,.

2.

The integrity of fluid and electrical distribution systems related to safe shutdown and engineered safety features, and i

3.

The integrity and functionability of mechanical and electrical equipment and engineertd safety feature systems (including con-j tainment).

We have reviewed the systems at the Big Rock Point facility which are imortant to safety and should be included in your seismic reevaluation These systems are identified in Enclosure (1).

program.

You are requested to revTse and resubmit within 30 days of receipt of this letter your seismic reevaluation program. Your revised program should include the systems identified in Enclosure (1) and their related A schedule for cowletion of seismic reevalua-structures and co@cnents.

tions, submittal of analysis results for NRC review and the installation of l

any necessary modifications should be included in your revised program.

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Ytur schedule, if differ'ent from our August 4,1980 request, should be Justified and should be consistent with your conclusion that continued operation is justified in the interim until the seismic reevaluation program is coglete and any necess'ary modifications are iglemented.

Sincerely, l5!

Dennis M. Crutchfield, CMef Operating Reactors Branch No. 5 Division of Licensing

Enclosure:

As stated

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Mr. David P. Hoffman CC tr. Paul A. Perry, Secretary U. S. En'vironmental Protecti+t

' Consumers Power Cogany Agency 212 West Michigan Avenue Federal Activities Branch Jackson, Michigan 49201 Region V Office ATTN: EIS COORDINATOR Judd L. Bacon, Esquire 230 South Dearborn Street Consumers Power Cogany Chicago, Illinois 60604 212 West Michigan Avenue Jackson, Michigan 49201 Herbert Grossman, Esq., Chairen Atomic Safety and Licensing Bard Joseph Gallo Esquire U. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Washington, D. C.

20555 1120 Connecticut Avenue Room 325 Dr. Oscar H. Paris Washington, D. C.

20036 Atomic Safety and Licensing Board U. S. Nuclear Regulatory Comission Peter W. Steketee, Esquire Washington, D. C.

20555 505 Peoples Building

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' Grand Rapids, Michigan 49503 Mr. Frederick J. Shon Atomic Safety and Licensing Board Alan S. Rosenthal, Esq., Chairman U. S. Nuclear Regulatory Comission Atomic Safety & Licensing Appeal Board Washington, D. C.

20555 U. S. Nuclear RegJiatory Conraission Washington, D. C.

20555

• Big Rock Point Nuclear Power Plant ATTN: Mr. C. J. Hartman Mr. John O'Neill, II Plant Superintendent Route 2, Box 44 Charlevoix, Michigan 49720 Maple City, Michigan 4965*

Christa-Maria Charlevoix Public Library Route 2, Box 108C 107 Clinton Street Charlevoix, Michigan 49720 Charlevoix, Michigan William J. Scanlon, Esquire Chairman 2034 Pauline Boulevard County Board of Supervisors Ann Arbor, Michigan 48103 Charlevoix County Charlevoix, Michigan 49720 Resident Inspector Big Rock Point Plant Office of the Governor (2) c/o U.S. NRC Room 1 - Capitol Building RR #3, Box 600 Lansing, Michigan 48913 Charlevoix, Michigan 49720 Director, Criteria and Standards Mr. Jim E. Mills Division Route 2, Box 108C Office of Radiation Programs Charlevoix, Michigan 49720 (ANR-460)

U. S. Environmental Protection Thomas S. Moore Agency Atomic Safety & Licensing Appeal Board Washington, D. C.

20460 U. S. Nuclear Regulatory Com ission Washington, D. C.

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ENCLOSURE (1)

SAFETY RELATED SYSTEMS, STRUCTURES AND COMPONENTS BIG ROCK POINT PLANT The scope of review for the seismic re-evaluation program should include the systems, structures, and components (fncluding emergency power supply and distribution, instrumentation, and actuation systems) with the following functions:

1.

The reactor coolant pressure boundary as well as the core and vessel internals. This should also include those portions of the main steam system up to but act including the turbine stop valve and connected piping of 2h inch or larger nominal pipe size, up to and including the first valve that is either nomally closed or is capable of automatic closure during all modes of normal reactor operation.

2.

Systems or portions of systems that are required for safe shutdown as identified in the SEP safe shutdown review (SEP Topic VII-3). The system boundary includes those partions of the system required to perform the ~

safety function and connected piping up to and including the first valve that is either normally closed or capable of automatic closure when the safety function is required.

3.

Systems or portions of systems that are required to mitigate design basis event::, i.e., accidents and transients (SEP Topics XV-1 to XV-24). The functions to be provided include emergency core cooling, post-accident containment heat removal, post-accident containment atmosphere cleanup, as well as support systems, such as cooling water, needed for proper function-ing of these systems.

4.

Systems and structures required fer fuel storage (SEP Topic IX-1).

Integrity of the spent fuel pool structure including the racks is needed.

Failure of the liner plate due to the safe shutdown earthquake must not result in significant radiological releases, or in Icss of ability to keep the fuel covered.

Failure of cooling water systems or other systems connected to the pool should not pemit draining of the fuel pool. Means to supply make-up to the pool as needed must be provided.

5.

Structures that house the above equipment.

For the Big Rock Point plant, the staff considers the following systems, and associated structures, and components should be addressed:

a) Reactor Coolant System (RCS) 1 b) Portions of Main Steam Sys. tem l

Portions of Main Feedwater System c) l l

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~~ d) P rtions of systems directly connected to RCS up to and including isolation valves e) Control Rod Drives f)

Emergency Condenser g) Core Spray System h) Backup Core Spray System

1) Enclosure Spray System j) Backup Enclosure Spray System k) Reactor Depressurizationyystem

1) Fire Water System m) Post-Incident Cooling System n) Spent Fuel Pool and Makeup As discussed above, a " system" also includes the power supply, instrumentation and actuation systems.

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