ML19253A503
| ML19253A503 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/22/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 7909100171 | |
| Download: ML19253A503 (1) | |
Text
CENTRAL FILES
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August 22, 1979 Docket Nos.
50-313 50-368 Arkansas Power and Light Company ATTN:
Mr. Willia.2 Cavanaugh III Vice President of Generation and Construction P. O. Box 551 Little Rock, Arkansas 72203 Gentlemen:
Enclosed is IE Bulletin No. 79-02, Revision 1, Supplement No. 1, which clarifies NRC positions on actions requested with regard to your power reactor facilities with an operating license.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely e
qfa g Karl V. Seyfrit Director
Enclosures:
1.
IE Bulletin No. 79-02, Revision No. 1 (Supplement No. 1) 2.
List of IE Bulletins Issued in Last Six Months cc: James P. O'llanlon, Plant Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 S.'?GO W 7909100/ 7 / p
UNITED STATES NUCLEAR REGULATORY C0fMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-02 Revision No. 1 (Supri.ement No. 1)
Date: August 20, 1979 Page 1 of 2 PIPE surrwu BASE PLATE DESIGNS USING CONCRETE EXPANSION ANCHOR BOLTS Descr:p u an of Circumstances:
The supplement to IE Bulletin No. 79-02 is intended to establish criteria for the evaluation of interim acceptaoility of plant operation with less than the design factors of safety fur piping supports due to as-5uilt problems, under design, base plate flexibility, or anchor bolt deficiencies.
In the reviews for system operability of the Duane Arnold and Crystal River facilities, criteria have been developed by the NRC staff that defines pipe support operability. The criteria has been applied in lieu of other analysis or evaluation. Specifically, the licensees identified problems with pipe supports in which the original design factors of safety were not met but some lesser margin was available. The design margins of four or five are intended to be final design and installation objectives, but systems may be classed as operable en an interim basis with some lesser margin, providing a program of restoration to at least the Bulletin factors of safety has been developed.
Facilities which fall outside the operability criteria are considered to probabiy require a Technical Specification exception and will require review on a case-by-case basis.
Action to be Taken by Licensees:
For the following two cases, plant operation may continue or may begin:
a.
For the support as a unit, the factor of safety compared to ulti-mate strengths is less than the original design but equal to or greater than two.
b.
For the anchor bolts the factor of safety is equal to or greater than two and for the support steel the original design factor of safety com-pared to ultimate strengths is met.
The above criteria may be applied DUPLICATE DOCUMENT graded to design margins of safety r.,3 OU j f3 o
a and by the next refueling for nona fined in Bulletin No. 79-14 where Entire document previously entered into system under:
of the plant which can be entered ANO 7O (OM[/
No. Of pages:-
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