ML19347E899

Requests That Util Not Purge During Plant Operations Until Approval to Do So Is Received from Nrc.Purge Valve Safety Analysis & Containment Purge Sys Currently Under Review. Safety Evaluations Will Be Forwarded Upon Completion

ML19347E899
Person / Time
Site:	Rancho Seco
Issue date:	05/11/1981
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
TASK-2.E.4.2, TASK-TM NUDOCS 8105140203
Download: ML19347E899 (3)

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o, UNITED STATES NUCLEAR REGULATORY COMMISSION o

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.: j WASHINGTON, D. C. 20555 k, V.o#

May 11,1981 Docket No. 50-312 7 ::

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d Mr. J. J. Mattimoe 3N./ p ISOT A -

'2 Assistant General Manager and Chief Engineer b% %

Sacramento Municipal Utility

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District 9-l 6201 S Street h

P. O. Box 15830 02 Je Sacramento, Califormia 95813

SUBJECT:

REACTOR BUILDING PURGE AND VENT VALVES; NUREG-0737 ITEM II.E.4.2 Your safety analysis of containment purge valve operability was submitted to us in your April 20, 1981 letter. The analysis indicated that the purge valves will function under LOCA conditions if the maximum opening of the valves is restricted to values obtained from the analysis.

In your September 19, 1980 letter, you committed to operate Rancho Seco with the purge valves closed and with the air source to the valve operator isolated. Your April 20, 1981 letter indicated that once the failure made of the solenoid on the valve operator is corrected, you intend to resume purging during plant operation.

We reiterate our position on this matter. To assure health and safety of the public, we request that you do not purge during plant operation until approval to do so is recieved from us. We are presently reviewing your purge valve safety analysis and are performing separate reviews of your containment purge system. Upon completion of our reviews, safety evaluations will be sent to you, along with requests for Technical Specifications changes, if appropriate.

incerely, i f.

9 o)n F. Stolz, Chi f perating Reactors Branch #4 Division of Licensing cc: See next page 81051.40f 03

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W Sacramento Municipal Utility Rancho Seco, Docket No. 50-312 District cc w/ enclosure (s):

David S. Kaplan, Secretary and Christopher Ellison, Esq.

General Counsel Dian Grueuich, Esq.

6201 S Street California Energy Commission P. O. Box 15830 lill Howe Avenue Sacramento, California 95813 Sacramento, California 95825 Sacramento County Ms. Eleanor Schwartz Board of Supervisors California State Office 827 7th Street, Room 424 600 Pennsylvania Avenue, S.E., Rm. 201 Sacramento, California 95814 Washington, D. C.

20003 Business and Municipal Department Docketing and Service Section Sacramento City-County Library Office of the Secretary 828 I Street U.S. Nuclear Regulatory Commission Sacramento, California 95814 Washington, D. C.

20555 Resident Inspcctor/ Rancho Seco Director, Criteria and Standards c/o U. S. N. R. C.

Division 14410 Twin Cities Road Office of Radiation Programs ( ANR-460)

Herald, CA 95638 U. S. Environmental Protection Agency Washington, D. C.

20460 Dr. Ric.hard F. Cole Atomic Safety S Licensing Board Panel U.S. Nuclear Regulatory Commission U. S. Environmental Protection Agency

' Washington, D. C.

20555 Region IX Office ATTN:

EIS COORDINATOR Mr. Frederick J. Shon 215 Fremont Street Atomic Safety and Licensing Board San Francisco, California 94111 Panel U.S. Nuclear Regulatory Commission Mr. Robert B. Borsum Washington, D. C.

20555 Babcock & Wilcox Nuclear Power Generation Division Elizabeth S. Bewers, Esq.

Suite 420, 7735 Old Georgetown Road Chairman, Atomic Safety and Bethesda, Maryland 20014 Licensing Board Panel U.S. Nuclear Regulatory Corrnission Thomas Baxter, Esq.

Washington, D. C.

20555 Shaw, Pittman, Potts & Trowbridge 1800 M Street, N.W.

Mr. Michael R. Eaton Washington, D. C.

20036 Energy Issues Coordinator Sierra Club Legislative Office Herbert H. Brown, Esq.

1107 9th Street, Room 1020 Lawrence Coe Lanpher, Esq.

Sacramento, California 95814 Hill, Christopher and Phillips, P.C.

1900 M Street, N.W.

Atomic Safety and Licensing Board Washington, D. C.

20036 Panel U.S. Nuclear Regulatory Commission Helen Hubbard Washington, D. C.

20555 P. O. Box 63 Sunol, California 94586

Sacramento Municipal Utility District Atomic Safety and Licensing Appeal Board Panel U.S. Nuclear Regulatory Commission Washington, D. C.

20555 California Department of Health ATTN: Chief, Environmental Radiation Control Unit Radiological Health Section 714 P Street, Room 498 Sacramento, California 95814