ML19208B709
| ML19208B709 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/07/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| NUDOCS 7909210238 | |
| Download: ML19208B709 (1) | |
Text
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UNITED STATES y}
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,o' KING OF PRUSSIA, PENNSYLVANIA 19406 September 7, 1979 Docket Nos. 50-336 50-245 50-423 Northeast Nuclear Energy Company ATTN: Mr. W. G. Counsil Vice President - Nuclear Engineering and Operations P. O. Box 270 Hartford, Connecticut 06101 Gentlemen:
The enclosed supplement to Bulletin No. 79-14 is forwarded to you to provide added guidance on the intent of the Bulletin.
If you desire additional information regarding this matter, please contact this office.
Sincerely,
._ T
)
W oyce H. Grier Director
Enclosures:
1.
Supplement 2 to IE Bulletin No. 79-14 2.
List of IE Bulletins Issued in Last Six Months cc w/encls:
K. W. Gray, Construction Quality Assurance Lead H. R. Nims, Director of Nuclear Projects J. F. Opeka, Station Superintendent D. G. Diedrick, Manager of Quality Assurance J. R. Himmelwright, Licensing Safeguards Engineer A. Z. Roisman, Natural Resources Defense Council
.T/8333 qg09210 N
ENCLOSURE 1 SSINS:
6820 Accession No.: 7908220109 UN PCD STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-14 Supplement 2 Date:
September 7,1979 Page 1 of 2 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Description of Circumstances:
IE Bulletin No. 79-14 was issued on July 2, revised on July 18, and first supplemented on August 15, 1979. The bulletin requested licensees to take certain actions to verify that seismic analyses are applicable to as-built plants. Supplement 2 provides the fol'owing additional guidance with regard to implementation of the bulletin requirements:
Nonconformances Ore way of satisfying the requirements of the bulletin is to inspect safety-related piping systems against the specific revisions of drawings which were used as input to the seismic analysis.
Some architect-engineers (A-E) however, are recommending that their customers inspect these systems against the latest revisions of the drawings and mark them as necessary to define the as-built configuration of the systems.
These drawings are then returned to the AE's office! for comp ~arison by the analyst to the seismic analysis input.
For licensues taking this approach, the seismic analyst will be the person who will identify nonconformances.
The first supplement to the bulletin provided guidance with regard to evaluation of nonconformances.
That guidance is appropriate for licensees inspecting against later drawings.
The licensee should assure that he is promptly notified when the AE identifies a nonconformance, that the initial engineering judgment is completed in two days and that the analytical engineering evaluation is completed in 30 days.
If either the engineering judgement or the analytical engineering evaluation indicates that system operability is in jeopardy, the licensee is expected to meet the applicable technical specification action statement.
Visual Approximations Some licensees are visually estimating pip &
elements, and have not documented which da DUPLICATE DOCUMENT g,/%M Visual estimation of dimensions is not enc [i where visual estimates are used, the accur, Entire document previous 1y entered ance requirements.
Further, in documentini into system under:
ically identify those data that were visua 7 g gg O/07 No. of Pages:
7