ML20235V717
| ML20235V717 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Rancho Seco, 05000000 |
| Issue date: | 10/05/1987 |
| From: | Firlit J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Miraglia F Office of Nuclear Reactor Regulation |
| References | |
| AGM-NPP-87-285, NUDOCS 8710150287 | |
| Download: ML20235V717 (2) | |
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. SACRAMENTO MUNICIPAL UTILITY DISTRICT O P. O. Box 15830, Sacramento CA 95852-1830,(916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA October 5, 1987 M
AGH/NPP.87-285 f
U. S. Nuclear Regulatory Commission Attn:
Frank J. Miraglia, Jr.
Associate Director for Projects Philips Building 7920 Norfolk Avenue Bethesda, MD 20014 DOCKET NO. 50-312
. RANCHO SECO NUCLEAR GENERATING STATION LICENSE NO. DPR-54 REACTOR VESSEL MATERIALS SURVEILLANCE PROGRAM
Dear Mr. Miraglia:
SMUD is participating in the B&W Integrated Reactor Vessel Materials Surveil-lance Program with the Toledo Edison Company's Davis-Besse Unit I reactor serving as the host reactor for Rancho Seco surveillance capsules.
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Technical Specifications for Rancho Seco require the submittal of a report, or an application for a facility operating license amendment, whenever (starting i
one year after Davis-Besse begins commercial operation at 1001. power) Davis-l Besse does not maintain a cumulative reactor utilization factor of 65% or i
greater.
This letter constitutes that report.
Davis-Besse reached 100% power on July 1, 1978, and as of this date has not maintained the required utilization factor. However, the current Rancho Seco l
Technical. Specifications related to reactor vessel material irradiation allow for an accumulated neutron fluence corresponding to eight effective full power years (EFPY) of operation. As of December 26, 1985, Rancho Seco had experienced approximately 5.3 EFPY and will reach only approximately 6.2 EFPY at the end of the next fuel cycle.
4 A Rancho Seco surveillance capsule was withdrawn from Davis-Besse during the second quarter of 1980. Testing and data evaluation for the material specimens in this capsule were performed. As a result, revised Technical Specifications to extend operation from five EFPY to eight EFPY, were issued July 11, 1984.
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>N RANCHO SECO NUCLEAR GENERALNG STATION L.1444o Twin Cities Road, Herald, CA 95638-9799;(209) 333-2935
AGM/NPP 87-285 F. J. Miraglia A second Rancho Seco surveillance capsule was withdrawn from Davis-Besse during 1982.
The results of this capsule's evaluation (BAH-1792) supports operation up to 15 EFPY (see District submittal dated July 18, 1984).
The present Technical Specifications relating to reactor vessel material irradiation remain valid. The limits will be modified prior to expiration both to account for ongoing irradiation and to extend the applicability period. He feel that continued operation of Rancho Seco is therefore acceptable.
Please contact me if you have any questions. Members of your staff with questions requiring additional information or clarification may contact Robert Little at (916) 452-3211, extension 4477.
Sincerely, N
b J se F. Firlit Assistant General Manager, Nuclear Power Production cc:
G. Kalman, NRC, Bethesda (wA&tah)
A. D'Angelo, NRC, Rancho Seco (
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J.B. Martin, NRC, Region V
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