ML20206B651

Forwards Corrected SER Re Matl Properties & Fast Neutron Fluence of Reactor Vessel in Compliance w/10CFR50.61.Util Met Requirements for Protection Against Pts.Periodic Future Reevaluations of Rt (PTS) Should Be Submitted

ML20206B651
Person / Time
Site:	Rancho Seco
Issue date:	03/13/1987
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Julie Ward SACRAMENTO MUNICIPAL UTILITY DISTRICT
Shared Package
ML20206B654	List: ML20206B651 ML20206B656
References
NUDOCS 8704090269
Download: ML20206B651 (2)

Text

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(o nw< SE g"-

4 ' March 13;-1987 ~

ig %o h Co-Docket No. 50-317- Distribution:  ;

NRC f. LPCPs Branch Files RIngram OGC-Bethesda.

RWeller. SMiner

, Vr. .!ohn E. Ward Gralman. Llois Sacramento.Municipel Utility District ACPS IE-3 Rancho Seco Kuclear Generating Station "

Post Office Box 15830, Mail Stop No. 291-Sacranento, California 058EP-1830

SUBJECT:

. RANCHO SEC0 NUCLEAR GENERATING STATION-FPACTUPE TOUGHbESS PEQUTFEMENTS FOR PROTECTIOF AGAINST PRESSUPIZED THEr. MAL SHOCK EVENTS (10 CFR. 50.61)

By letter dated January 23, 1986, you submitted information en the material properties and fast neutron fluence of the Rancho Seco reactor vessel in compliance with the requirements of 10 CFR 50.61. .We have completed our review of the information. From.our review of the material properties, we-have concluded that the controlling material has been properly identified ard the ,iustifications given for the copper and nickel contents and the initial i RT are acceptable. From our review of the neutron fluence on the'inside 4

subceofthepressurevessel,wehaveconcludedthattheRancho.Seco pressure vessel meets the fracture toughness requirements of 10 CFR 50.61 for operation to the end of the current license. Our Safety Evaluation Report (SER) is enclosed for your information. However,- we request that you 'subnit periodic future reevaluations of the RT and corresponding comparisons with thepredictionsinyourletterdatedJabry 23, 1986 (Reference 1 in the enclosed SER). These submittals can be included with submittals of Pressure-Temperature operation limits recuired by 10 CFR 50 Appendix G. .

This request for additional information was approved by the Office of-Management and Budget under clearance number 3150-001), which expires September 30, 1989.

Sincerely,

/S/

John F. Stolz, Director PWR Project Directorate #6 Division of PVR Licensing-P

Enclosure:

As stated cc w/ enclosure:

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{ Mr. John E. Ward Ran'cho Seco Nuclear Generating Sacramento Municipal Utility District Station cc:

.Mr. David S. Kaplan, Secretary Sacramento County and Gendral Counsel Board of Supervisors Sacramento Municipal Utility 827 7th Street, Poom 424 District Sacramento, California 95814 6201 S Street P. O. Box 15830 Ms. Helen Hubbard 1 Sacramento, California 95813 P. O. Box 63

Sunol, California 94586

. Thomas A. Baxter, Esq.

i Shaw, Pittman, Potts & Trowbridge 1

2300 N Street, N.W.

- Washington, D.C. 20037 3

Mr. Pon Columbo i Sacramento Municipal Utility District 4

Rancho Seco Nuclear Generating Station 4440 Twin Cities Road 4

Herald, California 95638-9799 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division

, Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 ,

Resident Inspector / Rancho Seco c/o U. S. N. R. C.

! 14410 Twin Cities Road i Herald, California 95638 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Director Energy Facilities Siting Division Energy Resources Conserva. tion &

Development Commission 1516 - 9th Street .

Sacramento, California 95814 Mr. Joseph 0. Ward, Chief

! Radiological Health Branch State Department of Health Services 714 P Street, Office Building #8 i Sacramento, California 95814 i

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