ML13308B535
| ML13308B535 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 10/13/1973 |
| From: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Johari Moore SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8103110324 | |
| Download: ML13308B535 (2) | |
Text
a OUNITED STATES ATOMIC ENERGY COMMISSION WASHINGTON, D.C. 20545 rr~r Q~OCT 1 919 73 Docket No.
50-206 Southern California Edison Company ATTN:
Mr. Jack B. Moore Vice President 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770 Gentlemen; The Regulatory staff has had the subject of anticipated transients without scram (ATWS) in water-cooled reactor power plants under study for some time.
The staff has completed its review of ATWS and has concluded that measures should be taken to improve nuclear plant designs in this regard. Details of the staff review and conclusions and of the steps that should be taken to deal with ATWS are given in the staff document "Technical Report on Anticipated Transients Without Scram for Water Cooled Power Reactors", September 1973, a copy of which is enclosed for your information. The improvement measures acceptable to the staff are outlined in the staff position on ATWS; Appendix A, of the enclosed report, in descending order of preference; that is, Section II-A of the staff position describes the ultimate objective. For those facilities for which the imposition of the requirements of Section II-A is not practical, the staff will accept the alternate approaches of Sections II-B and C subject to the limitations specified in the staff position. The rationale and bases for this approach are given in the enclosed report.
Acceptable measures that should be taken for the subject facility(s) are either those in Section II-A or II-C of the staff position. If there is reasonable assurance that the provisions of Section II-A can be met satisfactorily on a reasonable schedule (less than 3 years) for the subject facility(s), you need not analyze the consequences of ATWS. You must, however, provide sufficient analyses and discussion
/ 3(I y
2OCT 1 ) 973 to justify your position and a commitment that YOU will meet the pro visions of Section II-A or revert to the provisions of Section II-c if required by the staff.YoshudeposinofSconIC than requiry 1, 19, You should advise the staff by no later tan dJanuary, 1974, of the approach you intend to take and submit a detailed report addressing fully either Sections Il-A or II-C of the staff Position by October 1 97er an I t o the Safety Analysis Report. Yor194, as an amendment to the Saf ty nal sis Rep rt. Your response should be submitted as one original and thirty-nine additional copies.
The staff is prepared to discuss this matter with you at a mutually agreeable time.
Sincerely, A. Giambusso, Deputy Director for Reactor Projects Directorate of Licensing Enclosure; Technical Report on Anticipated Transients Without Scram for Water-Cooled Power Reactors cc w/enclosure:
Rollin E. Woodbury, Vice President
& General Counsel Southern California Edison Company Post Office Box 800 Rosemead, California 91770 Chickering & Gregory, General Counsel ATTN:
C. Hayden Ames, Esquire San Diego Gas and Electric Company 111 Sutter Street San Francisco, California 94104 San Clemente Public Library 233 Granada Street San Clemente, California 92672