ML20024G344
| ML20024G344 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 01/03/1975 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Mayer L NORTHERN STATES POWER CO. |
| References | |
| NUDOCS 9102110338 | |
| Download: ML20024G344 (2) | |
Text
______ -
o DISTRIBUTION NRC PDR local PDR S
(Docket File M*
ORB #2 Reading i
KRGoller TJCarter OI6E (3) 0 Docket No. 50-263 D
een BBuckley RMDiggs Northern States Power Company y
cl an, ORN1 Amt
- k. L. O. hyer Director of Nuclear TBAbernathy, DTIE SVarga Support Services 414 Nicollet Mall ACRS (%)
Minneapolis, Minnesota 55401 Gentlemen The Regulatory staff has completed its initial review of the structural aspects of your report, " Preliminary Report of Fuel Cask Drop Accident," dated October 1,1974. We find that additional information is required for the staff to complete its structural evaluation. 'Ihe additional information requested ie enclosed.
i Plasse inform us within ten (10) days af ter receipt of this letter of your planned schedule for submitting the response.
If you have any questions regarding the request or if you would like to schedule a meeting with the staff to discuss this matter, please s@fset@ CTI 8FtJpck}ey;. gy, B
l Sincerely, 1
Or%ra iby Duns L.Omova Dennis L. Ziemann, Chief i
Operating Reactors Branch f 2 Division of Reactor Licensing Enclosures i
Additional Information l
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( Form AFC.31 A (Rev. 9 53) AECM 0240 W u. e. novannusur enintime orricas nove.eae.see
Northern States Power Company.
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l cc w/ enclosure:
j Arthur Renquist, Esquire The Environmental Conservation Vice President - Law Library
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Northern St ates Power Comp'any Minneapolis Public Library
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414 Nicollet Mall 300 Nicollet Mall Minneapolis, Minnesota 55401 Minneapolis, Minnesota 55401 Gerald Charnoff Shaw, Pittman, Potts, Trowbridge and Madden 910 - 17th Street, N. W.
Washington, D. C.
20036 i
Howard J. Vogel, Esquire LeCol Counsel 2750 Dean Parkway tunneapolis, Minnesota 55416 Steve Cadler, P. E.
2120 Carter Avenue St. Paul, Minnesota 55108 Mr. Daniel L. Ficker Assistant City Attorney 638 City Hall St. Paul, Minnesota 55102 Ken Dzugan, Director-City of St. Paul Pollution Control Services 100 East 10th Street St. Paul, Minnesota 55108 Sandra S. Gardebring Special Assistant Attorney General Counsel for Minnesota Pollution Control Agency 1935 W. County Road B2 Roseville, Minnesota 55113 Anthony Z. Roisman, Esquire Berlin, Roisman and Kessler 1712 N Street, N. W.
Washington, D. C.
20036 1
ewo m.
REQUEST FOR ADDITIONAL INFORMATION NORTHERN STATES POWER COMPANY MONTICELLO NUCLEAR GENERATING PLANT DOCKET No. 50-263 The information provided in your report, " Preliminary Report of Fuel Cask Drop Accident Analysis," dated October 1,1974, is not sufficient to permit an evaluation of the safety margin provided in the design and construction of the spent fuel pool and other critical structursl elements for loads generated by a cask drop when combined with other design loads.
It is requested that you provide additional information to demonstrate that when the loads due to a cask drop are considered together with other design loads, the safety margins for the spent fuel pool, floor slabs, beams and protective structures for Category I equipment are similar to the safety margins established in Document (B), " Structural Design Criteria for Category I Structures Outside the Containment." Document (B) was orignially written for structures outside of the containment but is also applicable to the structures inside the containment. Therefore, provide a statement that when cask drop loads are included in the analysis the design critaria and the design methods for the spent fuel pool, and other essential structural systems satisfy the requirements of Document (F) cited above. A copy of Document (B) is attached for your convenience.
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