ML19208B766
| ML19208B766 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/07/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Dail L DUKE POWER CO. |
| References | |
| NUDOCS 7909210355 | |
| Download: ML19208B766 (1) | |
Text
.
// )
l f pa aE%q'o, UNITED STATES 8
NUCLEAR REGULATORY COMMISSION d o ' C.
o a
REGION 11 N
i-3 O
101 MARIETTA ST., N.W., SUITE 3100 k.....,o[
ATLANTA, GEORGIA 30303 In Reply Refer To:
SEP 7 gg79 RII:JPO 50-413, 50-414 50-488, 50-489 50-490, 5 % 491 50-492, 50-493 Duke Power Company Attn:
1..
C. Dail, Vice President Design Engineering P. O. Box 33189 Charlotte, North Carolina 28242 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 this matter, please contact this office.
Sincerely, 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
..e t
7900210 3 5 5 G
s a
Duke Power Company cc w/ enc 1:
D. G. Beam, Project Manager Post Office Box 223 Clover, South Carolina 29710 J. T. koore, Project Manager Post Office Box 422 Gaffney, South Carolina 29340 e
t
- e
..=
-=o h
'e $
U d U'sQde)
SSINS:
6820 Accesstion No.: 7908220109 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 7, 1979 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 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 cafety-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 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 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 engineerir.g 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 element % and have not documented which data have been obtained in that way.
Visual estimation of dimensions is not e m
nts however.
where visual estimates are used, the ac
~
ance requirements. Further, in documen DUPLICATE DOCUMENT ically identify those data that were vi dg. m d o.,
ao o
Entire dacument previously entered into system under:
h hh ANO No. of pages:
h EEIIImi m E-mlmmal um u