ML19208B925
| ML19208B925 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 09/07/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7909240167 | |
| Download: ML19208B925 (1) | |
Text
.o UNITED STATES
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WALNUT CR E E K, CALIF ORNI A 94596 September 7,1979 Docket flo. 50-344 Portland General Electric Cen:any 121 S. W. Salmon Street Portland, Oregon 97204 Attention: Mr. Charles Goodwin Assistant Vice President Gentlemen:
The enclosed Supplcment 2 to Bulletin flo. 79-14 is forwarded to you to pfovide added guidance on the intent of the Bulletin.
If you desire additional information regarding this matter, please contact this office.
Sincerely, W/
c.hv R. H. Engelken Director
Enclosures:
1.
Supplement 2 to IE Bulletin flo. 79-14 2.
List of IE Bulletins Issued in Last Six Months cc w/ enclosures:
C. P. Yundt, PGE F. Gaidos, PGE 383278 790924016-)
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SSINS:
6820 Accesstion No.: 7908220109 L
UNITED STATES NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555
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September 7, 1979/
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IE Rulletin No.19-14 i
Spoplerent 2 h
SEIS"IC CALYSIS FOR AS-BUILT SAFETY 9 ELATED PIPING SYSTEfe Description of Circumstances:
h IE Bulletin No. 79-14 was issued on July 2, revised on July 18, and first supplenented 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
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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) howevar, are recomending 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
-L 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 providad 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 notifiec 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 neet the applicable technical specification action g
statement.
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Visual Approximations Some licensees are visually estimati DUPLICATE DOCUMENT elements, and have not documented wh Visual estimation of dimensions is r where visual estimates are used, the Entire document.previously entered ance requirements.
Further, in doct into system under:
ically identify those data that werc 790 G dO/07 ANo No. of pages:
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