ML19208B691
| ML19208B691 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/07/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7909210204 | |
| Download: ML19208B691 (1) | |
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September 7, 1979 Docket Nos. 50-317 50-318 Baltimore Gas and Electric Company ATTN: Mr. A. E. Lundvall, Jr.
Vice President, Supply P. O. Box 1475 Baltimore, Maryland 21203 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, k
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:
R. M. Douglass, Manager, Quality Assurance L. B. Russell, Chief Engineer W. Gibson, General Supervisor, Operations QA R. C. L. Olson, Senior Engineer K. H. Sebra, Principal Engineer 3802Id 7 909 21o lON
ENCLOSURE 1 SSINS:
6820 Accession No.: 7908220109 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-14 Supplement 2 Date: September 7, 1979 Fage 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 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 comparise 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, t~at 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 itcensee is expected to meet the applicable technical specification action statement.
Visual Approximations
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Some licensees are visually estimating pi elements, and have not documented which df ogpLICATE DOCUMENT g
,%s Visual estimation of dimensions is not enc 000&.O where visual estimates are used, the accur Entire document previously entered ance requirements.
Further, in documentin into system under:
ically identify those data that were visua H0$ 22bl09 ANO No. of pages:
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