ML19208B797
| ML19208B797 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 09/07/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 7909210415 | |
| Download: ML19208B797 (1) | |
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_,o, UNITED STATES e
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September 7, 1979 In Reply Refer To:
RIV Docket Nos. 50-498/IE Bulletin No. 79-14, Supplement 2 50-499/IE Bulletin No. 79-14, supplement 2 Houston Lighting & Power Company ATTN:
Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 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 ad-ditional information regarding this matter, please contact this office.
Sincerely, e-
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Karl V. Seyfrit,
Director
Enclosures:
1.
Supplement 2 to IE Bulletin No. 79-14 2.
List of IE Bulletins Issued in the Last Six Months
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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 Page 1 of 2 SEISME 1.NALYSIS 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 inplementation of the bulletin requirements:
Nonconfermances 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.
3ame 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 A-E'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 A-E 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 visually estimating # "'
pipe lan~ ns and other ins ectinn elements,andhavenotdocumentedwhicf Visual estimation of dimensions is n,c DUPLICATE DOCUMENT 3dMM where visual estimates are used, the a ance requirements. Further, in docume Entire doennnent previously entered ically identify those data that were v into system under:
ANO H 0 0 2 0109 No. of pages:
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