ML20024A843
| ML20024A843 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/27/1983 |
| From: | Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| RJR-83-520, TAC-49703, NUDOCS 8307010034 | |
| Download: ML20024A843 (2) | |
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$) SACRAMENTO MUNICIPAL UTILITY DISTRICT C)
SMUD 95813; (916) 452-3211 RJR 83-520 June 27,1983 DIRECTOR OF NUCLEAR REACTOR REGULATION ATTENTION JOHN F STOLZ CHIEF OPERATING REACTORS BRANCH 4 U S NUCLEAR REGULATORY COMMISSION WASHINGTON D C 20555 DOCKET 50-312 RANCHO SECO NUCLEAR GENERATING STATION UNIT NO 1 REACTOR VESSEL MATERIALS SURVEILLANCE PROGP.AM The Sacramento Municipal Utility District is participating in the B&W Owners Integrated Vessel Materials Surveillance Program _with the Toledo Edison Company's Davis-Besse Unit 1 Reactor serving as the host reactor for Rancho Seco surveillance capsules. The Technical Specifications for Rancho Seco require the submittal of a report, or an application for a facility operating license amendment, whenever (starting one year after Davis-Besse begins commercial operation at 100% full power)
Davis-Besse does not maintain a cumulative reactor utilization factor of 65% or greater.
Davis-Besse reached 100% full power on July 1, 1978, and as of this date has not maintained the specified utilization factor. The current Rancho Seco Technical Specifications related to reactor vessel material irradiation are valid for an accumulated neutron fluence corresponding to 5.0 effective full power years (EFPY) of operation. Rancho Seco has reached approximately 4.4 EFPY as of the beginning of the current refueling outage and is not expected to reach 5.0 EFPY before March, 1984. Rancho Seco surveillance capsules have been withdrawn from Davis-Besse during the second quarter of 1980, and the third quarter of 1982. Testing and data evaluation for the material specimens in the first capsule have been com-pleted and were submitted to you on November 4, 1982, and a license amendment containing revised Technical Specifications for operation to eight EFPY were submitted on January 26, 1983. Testing and evaluation of the material specimens in the second capsule is nearing completion and is expected to support operation up to fifteen EFPY.
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JOHN F STOLZ June
, 1983 Therefore, as the present Technical Specifications related to reactor vessel j
material irradiation remain valid, and the limits will be modified before expiration to account for ongoing irradiation and to extend the applicability period, continued operation of Rancho Seco is acceptable.
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N R. J. Rodriguez Executive Director, Nu ear Enc i
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