ML19208B913
| ML19208B913 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/07/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Crouse R TOLEDO EDISON CO. |
| References | |
| NUDOCS 7909240145 | |
| Download: ML19208B913 (1) | |
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o UNITED STATES
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NUCLEAR REGULATORY COMMISSION G
'. r REGION 111 o,
799 ROOSEVELT ROAD
,e GLEN ELLYN,ILLINOls 60137 q $3 Docket No. 50-346 St.?
Toledo Edison Company
. ATTN-Mr. Richard P. Crouse Assistant Vice President Energy Supply Edir.on Plaza 300 Madison Avenue Toledo, OH 43632 Gentlemen:
The enclosed supple.nent to IE 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 cont =:t this office.
Sincerely,
(/ James G. f A G -- %
Keifie~r Director
Enclosure:
Supplement 2 to IE Bulletin No. 79-14 cc w/ encl:
Mr. T. Murray, Station Superintendent Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC i
TIC Harold W. Kohn, Power Siting Co:amission Helen W. Evans, State of Ohio 1
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Accesstion No.: 7908220109 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 7, 1979
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IE Bulletin No. 79-14 Supplement 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 bulictin 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.
So:ne architect-engineers (A-E) however, are recommending that their customers inspect these systems against the late:,t 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 comparison by the analyst to the seismic analysis input.
For licensees taking this approach, the seismic analyst will be the person who will identify nonconfonnances.
The first supplement to the M11etin provided guidance with regard to evaluation of nonconformances.
That 1 dance is appropriate for licensees inspecting t
against later drawings.
The licensee should assure W t 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 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 whic
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Visual estimation of dimensions is not where visual estimates are used, the ac DUPLICATE DOCUMENT ggtg ante requirements.
Further, in documer ically identify those data that were vi Entire document previously entered
'nto system under:
ANO ] O 880 O(O 9 No. of pages: