ML19208B915
| ML19208B915 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 09/07/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Bryan J UNION ELECTRIC CO. |
| References | |
| NUDOCS 7909240148 | |
| Download: ML19208B915 (1) | |
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Docket No. 50-483 Docket No. 50-486 Union Electric Company ATTN:
Mr. John K. Bryan Vice President - Nuclear P. O. Box 149 St. Louis, MO 63166 Gentlemen:
The enclosed supplement to IE 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,
")c n a h } b g h ~
,' James G. Keppler
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Director
Enclosure:
Supplement 2 to IE Bulletin No. 79-14 cc w/ enc 1:
Mr. W. H. Weber, Manager, Nuclear Construction Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Region I & IV Ms. K. Drey Hon. C. J. Frass, Cha;-nan Missouri Public Service Commission SS325G 7 9092 4014g.
SSINS:
6820 Accesstion No.: 7908220109 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGiON, D.C.
20555 September 7, 1979
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IE Bulletin No. 79-14 Supplement 2 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Description of Circumstances:
IE B;.. Min 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 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 configuration 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 apprcpriate 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 vist. ally estimating pipe lengths and other inspection elements, and have not documented whic baaa
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ante requirements.
Further, in docume ically identify thosa data that were v Entire document previously entered into system under:
77C M MO/07 ANO No. of pages:
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