ML20043A242

Advises That 900412 Request for Interim Waiver of Compliance from Tech Spec 3.2.2 Re Low Temp Overpressure Protection When Reactor Defueled Granted

ML20043A242
Person / Time
Site:	Rancho Seco
Issue date:	05/14/1990
From:	Holahan G Office of Nuclear Reactor Regulation
To:	Boggs D SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
NUDOCS 9005210072
Download: ML20043A242 (4)

Text

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UNITED sTA7Es

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NUCLEAR REGULATORY COMMISSION 7,

WASHINGTON, D. C 20665 May 14, 1990

. Docket No. 50-312 Mr. David Boggs General. Manager Sacramento Municipal Utility District 6201 S., Street P.O. Box 15830 Sacramento, California 95813

SUBJECT:

WAIVER OF COMPLIANCE FROM TECHNICAL SPECIFICATION 3.2.2, LOW TEMPERATURE OVERPRESSURE PROTECTION By letter dated April 12, 1990, the Sacramento Municipal Utility District, SMUD, the licensee for the Rancho Seco Nuclear Generating Station, requested interim relief from the requirements of Technical Specification 3.2.2.

This subsection g

of the Rancho Seco Technical Specifications includes requirements for low temperature overpressure protection, LTOP._ The interim relief, as requested, would delete LTOP requirements while the reactor. is defueled. The interim relief would remain in effect until the Defueled Mode Technicsi icecification Amendment is issued. We intend to process _the amendment in P 8xigent

. manner. The proposed Defueled Mode Technical Specifications e not include-LTOP requirements while the reactor is defueled.' The proposeo Defueled Mode Technical Specification Amendment was submitted by SMUD on December 29, 1989.

LTOP requirements were incorporated into the Rancho Seco Technical Specifica.

tions to reduce the likelihood of pressurizing the primary system to operating pressures while the system is cooled to 350 degrees F. or less. LTOP require-ments are based on a concern that the primary system pressure retaining components are more susceptible to brittle fracture if pressurizttion occurs at low temperatures. While the reactor is defueled, low temperature overpressure concerns as they relate to health and safety are effectively eliminated.

Based on the lack of a safety concern, it is unnecessary to follow the LTOP requirements while the reactor is defueled.

Notwithstanding health and safety issues, pressurization of the primary system at reduced temperatures could. damage pressure retaining components and compromise the potential for future power operations.

It is our understanding that_you-have developed procedural controls to prevent inadvertent pressurization of the primary system while the reactor is defueled, and that pressure recording instruments,,111 also remain in use during this period to maintain a pressure history of the system for the purpose of certifying operability.

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Mr. David Boggs Subject to the precautions discussed above, a waiver of compliance from Technical Specificatior 3.2.2 is granted.. The waiver will remain in effect until the Defueled Mor:e Technical Specification Amendment request is processed.

Sincerely, M

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t Gary M Hol an. Acting Director Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation ec: See next page f

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g Mr. David Boggs Rancho Seco Nuclear Generating Station Cc:

Mr. Dan Keuter Mr. John Bartus Assistant General Manager Ms. JoAnne Scott i

Rancho Seco Nuclear Generation Station Federal Energy Regulatory Comission 14440 Twin Cities Road 825 North Capitol Street, N. E.

Herald, California 95638-9799 Washington, D.C.

20425 Thomas A. Baxter, Esq.

Ms. Helen Hubbard Shaw, Pittman, Potts & Trowbridge P. O. Box 63 2300 N Street, N.W.

Sunol, California 94586 Washington, D.C.

20037 Environmental Conservation Mr. Steven Crunk Organization Manager, Nuclear Licensing Suite 320 Sacramento Municipal Utility District 101 First Street Rancho Seco Nuclear Generating Station Los Altos California 94022 14440 Twin Cities Road Herald, California 95638-9799 Ms. Jan Schori, General Counsel Sacramento Municipal Utility District Mr. Robert B. Borsum, Licensir g 6201 S Street Representative P.O. Box 15830 Babcock & Wilcox Sacramento, California 95813 Nuclear Power Division 1700 Rockville Pike - Suite 525 Rockville, Maryland 20852 Resident Inspector / Rancho Seco c/o U. S. N. R. C.

14440 Twin Cities Road Herald, California 95638 Regional Administrator, Region Y U.S. Nuclear Regulatory Comission 1450 Maria Lane, Suite 210 i

Walnut Creek, California 94596 j

Mr. John Hickman Senior Health Physicist Environmental Radioactive Management Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 i

Sacramento, California 95814 Sacramento County Board of Supervisors 700 H Street, Suite 2450 Sacramento, California 95814 (12) l

Mr. David Boggs May 14, 1990 Subject to the precautions discussed above, a waiver of compliance from Technical Specification 3.2.2 is granted. The waiver will remain in effect until the Defueled Mode Technical Specification Amendment request is processed.

Sincerely, original signed by Gary M. Holahan Gary M. Holahan, Acting Director Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION GJIRIEETITI~J NRC & LPDRs PD5 Reading GHolahan JZwolinski LA GKalman SReynolds OGC E. Jordan ACRS(10)

PD5 Plant File Region V R. Bangart, NMSS L. Chandler, 0GC

• See previous concurrence DRSP/PDS DRSP/PD5*

(A)DRSP/D:PD5*

NRR/ADR3*

Region V*

NRR/DR PShuttleworth GKalman JLarkins JZwolinski GHola an 5/ /90 5/10/90 5/8/90 5/8/90 5/9/90 5/14/90-

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