ML19208B856
| ML19208B856 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 09/07/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Short T OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 7909210496 | |
| Download: ML19208B856 (1) | |
Text
CENTRAL FILES PDR:HQ y(;M %q jo, UNITED STATES (PM e
,n NUCLEAR REGULATORY COMMISSION S3IC E
REGION IV dd
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611 HYAN PLAZA DRIVE, SUITE 1000 S
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AR LING TON, TEX AS 76012 September 7, 1979 Docket No.
50-285 Omaha Public Power District ATTN:
T. E. Short, Assistant General Manager 1623 Harney Street Omaha, Nebraska 68102 Gentlemen:
The enclosed supplepent 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,
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Karl V. Seyfrit Director d
Enclosures:
1.
Supplement 2 to IE Bulletin No. 7S'-14 2.
List of IE Bulletins Issued in th: Last Six Months cc:
R. L.
mdrews, Manager Fort Calhoun Station Post Office Box 98 Fo-c Calhoun, Nebraska 68102 k1 390,733 7 9 092.1 oq9(jg
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 SEISMIC W l_YSIS FOR AS-EUILT SAFETY-RELATED PIPING SYSTEL Descnution of Circumsnances:
IE Eulletin 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 i=plementation of the bulletin requirements:
Nonconformances One way if satisfying the requirements of the bulletin is to inspect safety-related p! ping 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 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 lengths and other inspection elements, and have not documented which Visual estimation of dimensions is not e DUPLICATE DOCUMENT Dd where visual estimates are used, the acc (3(3.')pigp@F ance requirements. Further, in documen Entire document previously entered ically identify those data that were vis into system under:
$ W 2-2 0 l 0 0l 790822 No. of pages:
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