ML19345F712
| ML19345F712 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/03/1981 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8102190100 | |
| Download: ML19345F712 (2) | |
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-y UNITED STATES
'i NUCLEAR REGULATORY COMMISSION s s-WASHINGTON, D. C. 20555
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February 3, 1981 r, a Docket No. 50-313 Ib g
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-8 tir. William Cavanaugh, III Vice President, Generation TEB 101981 m ;
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cw Arkansas Power & Light Company P. O. Box 551 v
Little Rock, Arkansas 72203 b
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Dear f1r. Cavanaugh:
We have completed our review of your letter dated fiay 20,1980, which responded to our request for information dated November 21, 1979, con-cerning the loading on steam generator tubes induced by slug flow during natural circulation in P&W reactor plants.
In order to bound the magnitude of the loading on the steam generator tubes during natural circulation, your analysis assumes that the slug travels at a velocity of 64.4 ft/sec. This corresponds to full power, forced flow operation and bounds any pressure differential which could develop under natural circulation. By use of the dynamic momentum equation, the maximum force on each tube as a result of the force on the upper tube sheet would be less than 1/10 of the tube's theoretical buckling load of 700 pounds. Based on this analysis we conclude that slug flow induced by natural circulation will not result in adverse loading of the steam generator tubes.
Therefore, we consider Item II.K.2.15 "Effect of Slug Flow on Steam Generator Tubes" of the Tiil Action Plan R9uirements is resolved for Arkansas Nuclear One, Unit No. 1.
Sincerely,
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s Robert W. Reid, Chief Operating Reactors Branch #4 Division of Licensing cc:
See next page 8102190IOO
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Arkansas Power & Light Company cc w/ enclosure (s):
Mr. David C. Trimble Manager, Licensing 4
Arkansas Power & Light Company P. O. Box 551 Director, Bureau of Environmental Little Rock, Arkansas 72203 Health Services 4815 West Markham Street Mr. James P. O'Hanlon Little Rock, Arkansas 72201 General Manager Arkansas Nuclear One P. O. Box 60S Russellville, Arkansas 72801 Mr. William Johnson U.S. Nuclear Regulatory Commission l
P. O. Box 2090 Russellville, Arkansas 72801 i
Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Mr. Nicholas S. Reynolds Debevoise & Liberman l
120017th Street, NU Washington, DC 20036 Arkansas Tech University Russellville, Arkansas 72801 I
Honorable Ermil Grant Acting County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801 Mr. Paul F. Levy, Director Arkansas Department of Energy j
3000 Kavanaugh Little Rock, Arkansas 72205 1
Director, Criteria and Standards Division Office of Radiation Progrars (ANR-460) l U. S. Environmental Protection Agency Washington, D. C.
20460 U. S. Environmental Protection Agency Region VI Office ATTN: EIS COORDINATOR 1201 Elm Street First International Building Dallas, Texas 75270
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