ML19249C056
| ML19249C056 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 08/20/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7909070250 | |
| Download: ML19249C056 (2) | |
Text
.
v
!b
% D %,g UNITED STATES ff NUCLEAR REGULATORY COMMISSION 8
M - [n E
REGION 11 i
101 MARIETT A sT., N W., SUtT E 3100 o
h
[
AT LANTA, G EORGIA 30303 AUC : 01974 In Reply Refer To:
RII:JP0 50-369 50-370 Duke Power Compa:
ATTN-W. O. Parker. Jr.
Vice Presidct:t, Steam Production P. O. Box 33189 Charlotte, NC 282 2 Gentlemen:
Enclosed is IE Bulletin No. 79-02, Pevision 1, Supplerent No.
1, which is for-warded to you for infortation.
No written response is required.
If you desire additional information regarding this catter, please contact this office.
Sincerely,
('d
'N b-c. s c
James P. O'Reilly Director
Enclosures:
1.
IE Bulletin No. 79-02, Revision No. 1 (Supplement No. 1) 2.
Listing of IE Bulletins Issued in Lut Six honths 3
[hl O L> lR)
T 999 0 702 5 0 O [i]lfrE][LTpr D
.o Uu #
L L
,,e',
no, U,/
.< w:
-e
.c
...w.
tillC 2 0 19
- Duke Power Company cc w/ encl:
M. D. McIntosh, Plant Manager Post Office Box 488 28031 Cornelius, North Carolina J. C. Rogers, Project Manager Post Office Box 33189 28242 Charlotte, North Carolina 0 ') /
f j g f.
't u, t)
SSINS:
6820 Accession No:
7908150164 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 August 20, 1979 IE Bulletin No. 79-02 Revision No. 1 (Supplement No. 1)
PIPE SUPPORT BASE PLATE DESIGNS USING CONCRETE EXPANSION ANCL R BO Description of Circumstances:
The supplement to IE Bulletin No. 79-02 is intended to establish criteria for the evaluation of interim acceptability of plant operation with less than the design factors of safety for piping supports due to as-built problems, under design, base plate flexibility, or anchor bolt deficiencies.
In the reviews for system operability of the Duane Arnold and Crystal River facilities, criteria have been developed by the NRC staff that defines pipe support The criteria has been applied in lieu of other analysis or evalua-operability.
Specifically, the licensees identified problems with pipe supports in which tion.
the original design factors of safety were not met but some lesser margin was The design margins of four or five are intended to be final design and avai?able.
installation objectives but systems may be classed as operable on an interim basis with some lesser margin providing a program of restoration to at least the Bulletin factors of safety has been developed. Facilities which fall outside the operability criteria are considered to probably require a Technical Specifica-tion exception and will require review on a case by case basis.
Action to be Taken by Licensees:
For the following two cases, plant operation may continue or may begin:
For the support as a unit, the factor of safety compared to ulti-a.mate strengths is less than the original design but equal to or greater than two.
For the anchor bolts the factor of safety is equal to or greater than b.two and for the support steel the original design factor of safety com-pared to ultimate strengths is met.
~'^~#
'~"N
~~
The above criteria may be applied graded to design margins of safety DUPLICATE DOCUMENT and by the next refueling for nona fined in Bulletin No. 79-14 where ' Entire document previously entered of the plant which can be entered into system under:
f0f($Q&y ANO
~
No. Of pages: