ML19208B712
| ML19208B712 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 09/07/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 7909210251 | |
| Download: ML19208B712 (1) | |
Text
yt
),,
UNITED STATES NUCLEAR REGULATORY COMMISSION
{}
g
- .' \\[) s >
0,
- j REGION 1 631 PARK AVENUE D
,o#
KING OF PRUSSIA, PENNSYLVANIA 19406 Docket Nos. 50-352 50-353 Philadelphia Electric Company ATTN: Mr. V. S. Boyer Vice President Engineering and Research 2301 Market Street Philadelphia, PA 19101 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 infc:mation regarding this matter, please contact this cifice.
Sincerely,
. s
/
n cyce H. Grier
' Director
Enclosures:
1.
Supplement 2 to IE Bulletin No. 79-14 2.
List of IE Bulletins Issued in Last Six Months
.7<"3004 70092102({
ENCLOSURE 1 SSINS:
6820 Accession No.: 7908220109 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 ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Description of Circumstances:
IE Bulletin No. 79-14 was issued on July 2, revised on July IF
' fi. st supplemented on August 15, 1979. The bulletin requested lice. xes 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 'Julletin 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 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 thi.s approach, the seismic analyst will be tae person who will identify nonconformances.
The first supplement to the bulletin provided guidance wit's regard to evaluation of nonconformances.
That guidance is appropriate for licensees inspecting agai.nst 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 engineering evaluation indicates that system operability is in jeopardy, the licensee is expected to meet the applicable technical specification action statement.
Visual Approximations hj DUPLICATE DOCUMENT Some licensees are visually estimatin ;
fl'i'S 00!>-
elements, and have not documented whi r Entil e document Visual estimation of dimensions is no 't into system under~
Y entered S
where visual estimates are used, the c ANO 7 h @ ],] " M ance requirements.
Further, in documd ically identify those data that were 'yf No* of pages:_
[
_