ML20058K788
| ML20058K788 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 10/19/1973 |
| From: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Mayer L NORTHERN STATES POWER CO. |
| References | |
| NUDOCS 9102140392 | |
| Download: ML20058K788 (3) | |
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UNITED STATES Q
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ATOMIC ENERGY COMMISSIO..
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WASHINGTON, D.C. 20543
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GCT 1 ? 973 Docket No. 50-263 Northern States Power Company ATTN:
Mr. L. O. Mayer, Director of Nuclear Support Services
(
414 Nicollet Mall i
Minneapolis, Minnesota 55401 Gentlemen:
The Regulatory staff has had the subject of anticipated transients i
without scram (ATWS) in water-cooled reactor power plants under study l
for some time.
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The staff has completed its review of ATWS and has concluded that f
measures should be taken to improve nuclear plant designs in this l
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 I
those facilities for which the imposition of the requirements of Section l
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.
i 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 i
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 f
ATWS. You must, however, provide sufficient analyses and discussion s
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. OCT ] s 1973 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.
You should advise the staff by no later than January 1,1974, of the approach you intend to take and submit a detailed report addressing fully either Sections II-A or II-C of the staff position by October 1, 1974, as an amendment to the Safety Analysis Report. Your response should be submitted as one original and thirty-nine additional copies.
s The staff is prepared to discuss this matter with you at a mutually agreeable time.
1 Sincerely, I
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A. Ciambusso, Deputy Director for Reactor Projects Directorate of Licensing
Enclosure:
Technical Report on Anticipated Transients Without Scram for Water-Cooled Power Reactors cc w/ enclosure: See next page l
)
i cc w/ enclosure:
Donald E. Nelson, Esquire VP and GC Northern States Power Company f
414 Nicollet Mall Minneapolis, Minnesota 55401 Gerald Charnoff i
Shaw, Pittman, Potts, Trowbridge & Madden
{
910 - 17th Street, N. W.
i Washington, D. C.
20006 Howard J. Vogel, Esquire Knittle & Vogel 814 Flour Exchange Building Minneapolis, Finnesota 55415 Steve Gadler, P. E.
2120 Carter Avenue I
St. Paul, Minnesota 55108 i
i Harriett Lansing, Esquire Assistant City Attorney City of St. Paul
-638 City Hall l
St. Paul, Minnesota 55102 Ken Dzugan l
Minnesota Pollution Control Agency l
717 Delaware Street, S. E.
}
Minneapolis, Minnesota 55440 l
Warren R. Lawson, M. D.
Secretary & Executive Officer State Department of Health i
717 Delaware Street, S. E.
t Minneapolis, Pdnnesota 55440 Environmental Library of Minnesota 1222 S. E. 4th Street Minneapolis, Minnesota 55414 l
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