ML19317G817
| ML19317G817 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/09/1973 |
| From: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Davis E SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 8004010645 | |
| Download: ML19317G817 (2) | |
Text
a OCT 9 1973 Docket No.
50-312
+
Sacramenco Municipal Utility District ATTH: Mr. E. K. Davis General Manager 6201 S Street, P. O. Box 15830 Sacrauento, California 95813 Centlemen:
j The Regulatory staff has had the subject of anticipated transients 1
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
" Technical Report on Anticipated Transients Without Scram for Water-i 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, the "A" sections of the staff position describe the ultimate objective. For j
those facilities for which the imposition of the requirements of the
~ '
"A" sections is not practical, the staff vill accept the alternate i
approaches of the "B" or "C" sections 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 the "A" or the "C" sections of the staff position.
If there is reasonable assurance that the provisions of the "A" sections 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 to justify
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- Sacramento Manicipal Utility OCT 9 1873 District your position and a commitment that you will meet the provisions of the "A" sections or revert to the provisions of the "C" sections if required by the staff. You should advise the staff by no later than January 1, 1974, of the approach you intend to take and submit
=i a detailed report addressing fully, either the "A" or "C" sections
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of the staff position by October 1,1974, as an ameadment to the ggg Safety Analysis Report.
The staff is prepsred to discuss this matter with you at a mutually agreeable time.
Sincerely.
Original Slgned
(
5 A. Giambusso, Deputy Director for Reactor Projects Directorate of Licensing
Enclosure:
Technical Report on ATWS for Water-Cooled P --
Reactors, Septem' cc:
David S. Kaplan, General Counsel DISTRIBUTION:
and Secretary AEC PDR 6201 S Street, P. O. Box 15830 Local PDR Sacramento, California 95813 Docket PWR-4 Rdg RCDeYoung RWKlecker JHendrie AKenneke OGC R0 (3)
BCBuckley EIGoulbourne VStello RTedesco RMaccary HDenton ASchwencer ACRS (16)
JPanzarella AGiambusso RSBoyd DEisenhut omet >
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