ML19276G804
| ML19276G804 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 08/03/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Stewart W FLORIDA POWER CORP. |
| References | |
| NUDOCS 7908270530 | |
| Download: ML19276G804 (3) | |
Text
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UNITED STATES y
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NUCLEAR REGULATORY COMMISSION ij g,g/;
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i August 3, 1979 Docket No. 50-302 Mr. W. P. Stewart Manager, Nuclear Operations Florida Power Corporation P. O. Box 14042, Mail Stop C-4 St. Petersburg, Florida 33733
Dear Mr. Stewart:
We have reviewed the reports " Investigation on the Structural Safety of the Spent Fuel Pool Due to Installation of High Capacity Fuel Racks" and "Non Linear Time History Seismic Analysis fcr the CR-3 High Density ~ Spent Fuel Storage Racks" submitted in support of your proposed spent fuel pool expansion.
We have determined that the additional information identified in the enclosure is necessary to continue our review.
Please provide your response within 30 days from the date of this letter.
Sincerely, Robert W. Reid, Chief -
Operating Reactors Branch f4 Division of Operating Reactors
Enclosure:
Request for Additional Infonnation cc w/ enclosure: See next page s
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Florida Power Corporation
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cc: Mr. S.
A.' Brandimore Vice Pre *' dent and 04rs'=1 Counsel P. O. Box 14042 St. Petersburg, Florida 33733 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Crystal River Public Library Crystal River, Florida 32629 e
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Enclosure I
REQUEST FOR ADDl.T.IONAL INFORIMTION CRYSTAL RIVER UNIT 3 -- SPENT FUEL 700L MODIFICATION
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1.
Provide justification for using B factors in the evaluation of water sloshing effects (Appendix C) differing from what is recomended in the cited references. Also, provide basis for the calculation of the depth of oscillating mass.
2.
Provide basis for selecting the impact factor in detennining the fuel assembly impact loads.
l 3.
Provide references or bases for internal strain energy equation and ultimate strain of stainless steel as used in Appendix F.
4.
FPC has stated that significant gaps exist between the fuel pool liner and:the pool walls. Provide the locations of those gaps and the reasons for their existence.
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5.
The friction coefficient is cited ranging from 0.3 to 0.8.
Any experi-mental data to back thosa numbers? Will wet condition affect the friction coefficient?
6.
Provide design bases of the spacer bars and discuss the effects of these bars on'the storage cell under seismic conditions.
7.
Provide additional information and results of the parametric studies which were cited to justify selecting the time history region from 0 to 1.2 seconds.
B.
!" maximum effective frictional reaction force affecting the pool liner plate and rack support feet, as stated in response 15, are taken from the
" Structural Analysis Design Report", NES 81A0522. The maximtm friction force is the same as presented in Table 8.1 of the "Non-Linear Time History Seismic Analy:,is", NES 81A0524. Explain why two different assump-tions, bracing versus free standing, end up with same force acting on the pool floor liner.
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