ML19208B778
| ML19208B778 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 09/07/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Stampley N MISSISSIPPI POWER & LIGHT CO. |
| References | |
| NUDOCS 7909210371 | |
| Download: ML19208B778 (1) | |
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UNITED STATES My 8
NUCLEAR REGULATORY COMMISSION o
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101 MARIETTA ST., N.W., SUITE 3100 g
ATLANTA, GEORGIA 30303 In Reply Refer To:
RII:JP0 gp7 50-416, 5g417 Mississippi Power and Light Company Attn:
N. L. Stampley Vice President of Production P. O. Box 1640 Jackson, Mississippi 39205 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 e.his matter, please contact this office.
Sin erely, James P. O'Reilly Director
Enclosures:
1.
Supplement 2 to IE Bulletin No. 79-14 2.
List of IE Bulletins Issued in the Last Six Months 3[3yO,'jl 8
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Mississippi Power and Light Con:pany cc w/ encl:
C. K. McCoy Plant Manager Post Office dox 756 Port G son, Mississippi 39150 SS40S2
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6820 Accesstion No.: 7908220109 G
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 7, 1979 IE Bulletin No. 79-14 k
Supplement 2 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Description of Circtmstances:
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 drastegs and mark them as 2:essary to define the as-built configuration of the systems. These drawin;s 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 wno 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 i
ens neering 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 pipe lengths and other inspection elements, and have not documented which data have been obtained in that way.
Visual estimation of dimensions is not e where visual estimates are used, the acc ance requirements. Further, in document DUPLICATE DOCUMENT o.,3;g()*p3 ically identify those data that were vis Entire document previously entered into system under:
79 o g2zo/ 09 No. of Pages:
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