ML13324A656
| ML13324A656 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/26/1985 |
| From: | Medford M Southern California Edison Co |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13324A657 | List: |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8507010253 | |
| Download: ML13324A656 (1) | |
Text
0 Southern California Edison Company P. O. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 M.O. MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING June 26, 1985 (213) 572-1749 Director, Office of Nuclear Reactor Regulation Attention:
Mr. J. A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:
Subject:
Docket No. 50-206 SEP Topic 111-6, Seismic Design Considerations Long Term Seismic Criteria and Methodology San Onofre Nuclear Generating Station Unit 1 By letter dated October 25, 1984, the NRC was provided with a report entitled "Evaluation of Piping and Structures, San Onofre Unit 1, Return to Service."
This report provided the results of the evaluation of the interaction between piping and structural beams as part of the demonstration of the safe shutdown capability for the Seismic Return to Service effort. During the recent meetings held with members of the NRC staff to review the criteria and methodology for the Long Term Service Seismic Reevaluation of San Onofre Unit 1, it was requested that a clarification summary of the above mentioned report be provided. Accordingly, enclosed are 3 copies of the report entitled, "Summary Report on the Evaluation of Interaction of Piping and Structures, San Onofre Unit 1 Return-to-Service," dated June 1985.
The Long Term Service Seismic Reevaluation of San Onofre Unit 1 will include additional seismic analysis of systems and equipment supported by structures for which the piping/structure interaction will be evaluated. For this effort, the information related to piping/structure interaction will be included in the "SONGS 1 LTS Program Living Scope Chart." A preliminary sample of this chart was provided to the NRC staff during meetings held on June 10 and 11, 1985.
If you have any questions or desire additional information, please contact me.
Very truly yours, p
M. 0. Medfor Manager, Nuclear Licensing Enclosure cc:
Dr. W. Hall (University of Illinois)