ML19249C051
| ML19249C051 | |
| Person / Time | |
|---|---|
| Site: | Catawba, Perkins, Cherokee  |
| Issue date: | 08/20/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Dail L DUKE POWER CO. |
| References | |
| NUDOCS 7909070242 | |
| Download: ML19249C051 (2) | |
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NUCLEAR REGULATORY COMMISSION
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In Reply Refer To:
RII:JPO 50-413, 50-414 50--491, 50-492 59--493/ 30-4S ]
o 0 0-489, 50-490J Duke Power Compar.y Attn:
L. C. Dail, Vice President Design Engineering P. O. Box 33189 Charlotte, North Carolina 28242 Gentlemen:
Enclosed is IE Bulletin No. 79-02, Revision 1, Supplement So.
1, which is for-varded to you for information. No written response is required.
If you desire additional information regarding this catter, please contact this office.
Sincerely, q % f *k
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s-O'Rbily James P.
Director
Enclosures:
1.
IE Bulletin 50. 79-02, Revision No. I (Supplement No. 1) 2.
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Duhe Power Compsey ce w/ encl:
D, G. Beam, Project Manager Post Office Box 223 29710 Clover, South Carolina J. 7. Moore, Project Manager Post Office Box 422 29340 Gaffney, South Carolina e
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SSINS: 6820 Accession No:
7908150164 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EhTORCEMENT WASHINGTON, D.C.
20555 August 20, 1979 IE Bulletin No. 79-02 Revision No. 1 (Supplement No. 1)
PIPE SUPPORT BASE PLATE DESIGNS USING CONCRETE EXPANSION Description of Circumstances:
The supplement to IE Bulletin No. 79-02 is intended to establish criteria for the evaluation of interim acceptability of plant operation with less than the design factors of safety for piping supports due to as-built 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 The criteria has been applied in lieu of other analysis or evalua-Specifically, the licensees identified problems with pipe supports in which operability.
tion.
the original design factors of safety were not met but some les available.
installation objectives but systems may be classed as operable on an interim basis with some lesser margin providing a program of restoration to at least the Facilities which fall outside the Bulletin factcrs of safety has been developed.
operability criteria are considered to probably require a Technical Specifica-tion 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:
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 a.
than two.
For the anchor bolts the factor of safety is equal to or greater the b.two and for the support steel the original design factor of safety com-pared to ultimate strengths is met.
The above criteria may be ar. plied Ib-Ms.Jz'M*Wue$ess spe_
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graded to design margins c,f safet DUPLICATE DOCUMENT and by the next refueling for non fined in Bulletin No. 79-14 where Entire document previously entered of the plant which can be entered into system under:
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