ML19276G546
| ML19276G546 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/20/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| Shared Package | |
| ML19276G547 | List: |
| References | |
| NUDOCS 7906050094 | |
| Download: ML19276G546 (2) | |
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UN'TE0 STATES
['r NUCLEAR REGULATORY CC* l.11sSION v(.QJ). p, :},
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April 20, 1979 Cocket ';o. 50-313 Mr. William Cavanaugh, III Vice President, Generation and Construction P. O. Box 551 Little Rock, Arki sas 72203 Cear Mr. Cavanaugh:
In 1373 2abccck and Wilcox found that Arkansas !!uclear Cne L' nit 1 (ANO-1) reactor vessel was cne of the 12 which might contain what they termed atypical weld metal.
The high silicon, lgw nickel, weld metal exhibited a Reference Temperature (RT, ) of 120F.
Therefore, this temperature was established as the minimum dud tensioning temp-erature until such time as it could be shcwn that Atl0-1 actually had no atypical weld m.etal or that 70 F was an allcwable RT.,O7 tempe ra ture by virtue of more precise analysis.
Sy lett'er dated Cecember 7,1973, and supported by letter dated April 16,1979, you requested that stud tensicning (detensionirg) at 70 F be allcwed at M0-1.
We have reviewed the fracture toughness tesc data presented in your letter of April 16, 1979, and find that stud tensioning at 70 F dces not entail a safety hazard and therefore, can be allcwed.
The technical basis for cur findings are discussed in the enclosed safety evaluation.
Sincerely, Y'
Robert W. Reid, Chief Operating Reactors Branch H Oivision of Operating Reactors inclosure:
Safety Evaluation cc w/ enclosure: See next pace
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7906050o94
Arkansas Pos.er & Light Oc.90any
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Phillip K. Lyon, Esquire House, Holns & Ja-ell 1550 Tower Suil cing Li ttle Rock, rkansas 72201 Mr. David C. Trimcle "anager, Licensing Arkansas Power 3 Light Cc.npany Post Crfice Sex 551 Little Rock, Arkansas 72203 Mr. James P. 0.'Hani:n General Manager Arkansas Nuclear One i
Post Of fice Scx 6C8 Russellville, Arkansas 72501 Mr. Willian Johnsen 8
U. 5. Muclear Regulatnry Commission P. O. Box 2090 Russelville, Arkansas 72301 Mr. Ecbert S. Eersum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Gaorgetown Road Bethesda, Maryland 20014 Arkansas Polytechnic C0llege Russellville, Arkansas 72301 I
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