ML19208B785
| ML19208B785 | |
| Person / Time | |
|---|---|
| Site: | Atlantic Nuclear Power Plant  |
| Issue date: | 09/07/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Collier A OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI |
| References | |
| NUDOCS 7909210392 | |
| Download: ML19208B785 (1) | |
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UNITED STATES
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8 NUCLEAR REGULATORY COMMISSION n
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101 MARIETTA ST., N.W., SUITE 3100 o
ATLANTA, GEORGIA 30303 In Reply Refer To:
SEP 7 1979 RII:JPo 50-437 Offshore Power Systems Attn A. R. Collier, President P. O. Box 8000 Jackeenville, Florida 32211 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 ofEice.
Sincercly.
NO R N N W'Reilly James P. O Director
Enclosures:
1.
Supplement 2 to IE Bulletin No. 79-14 2.
Liat of IE Bulletins Issued in the Last Six Months s
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SSINS:
6820 Accesstion No.: 7908220109 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 7, 1979 g
IE Bulletin No. 79-14 Supplement 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 reqaested licensees to take certain actions to verify that seismic analyses are applicable to as-built plants. Supplement 2 provides the following additional guidance with regard to implementation of the bulletin requirements:
Nonconformances One 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 coafiguration of the systems. These drawings are then returned to the AE's offices for comparison by the analyst to the seismic analysis input. For licensees 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 indicetes 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 pipe lengths and other inspection elements, and have not documed ed which data have been obtained in that way.
Visualestimationofdimensionsisnoteng where visual estimates are used, r h attu.
ance requirements. Further, in documenti DUPLICATE DOCUMENT ically identify those data that were visu 9 y ' # - ". g P
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