ML19249C068
| ML19249C068 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 08/20/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mary Johnson SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7909070271 | |
| Download: ML19249C068 (2) | |
Text
M,
.; u w.v,Jo e., ;m as -
7/C
=.
UNITED STATES
'g d
NUCLEAR REGULATORY COMMISSION 3.,.,
n
{
.. E REGION 11
[
101 M ARIETT A ST., N.W.. SUITE 3100 o
5 e
ATLANT A, GEORGIA 33303 n
In Reply Refer To:
RII:JP0 50-395 South Carolina Electric an1 Cas Ceapany ATIN:
M. C. Johnsen, Vice President Special Services and Purchasing, P. O. Box 764 Columbia, SC 29218 Gentlemen:
L. closed is IE Bulletin No. 79-02, Revision 1, Supplecent No.
I, which is for-warded to you for inferr.ation.
No written resicnse is required.
If you desite additional infortction regarding t his carter, ple ase centac t t hi s office.
Sincerely,
'[_(
4 4-c, f x
J aEi.s' P. O' Ke i l k y Director
Enclosures:
1.
IE Bulletin No. 79-02, Revision Nc. 1 (Supplement No. 1) 2.
Listing of IE Eulletins Issued in Last Six Months iP fTlfIW 1- !%
in a
- i'-.
'l Ii? LIT!
! M O I 7009070271 i.
i 4
,_) ' ' _, U b. d,ju; ;p :r d L...]
k j
AUG 2 0 19f3 Lactb Carolina Electric :nd Gas Company cc w/enti:
T. B. Conners, Jr.
Conners, Moore and Corber 1747 Pennsylvania Avenue, N.W.
Washington, D.C.
20006 A. A. Smith Quality Assurance Post Office Box 8 Jenkinsville, South Carolina 29065 O. S. Bradham, Manager Nuclear Operations Post Office Box 8 Jenkinsville, South Carolina 29065 C '> /;
] ') EJ t.
SSINS: 6820 Accession No:
7908150164 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EhTORCEMENT 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 EXPANSI 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 deficAencies.
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-Specifically, the licensees identified problems with pipe supports in which operability.
the original design factors of safety were not met but some le tion.
installation objectives but systems may be classed as operable on an interim basis available.
with some lesser margin providing a program of restoration to at least theFac Bulletin factors of safety has been developed.
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-mate strengths is less than the original design but equal to or greater a.
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 i al
% - ~. _
^
The above criteria may be applied
. DUPLICATE DOCUMENT graded to design margins of safety jl and by the 3 ext refueling for nona yEntire document P i usly entered fined in Bulletin No. 79-14 where #into system under*
of the plant vnich can be entered f
f&{&fft(
ANO No. of pages:
(,
<g,u 3
o.,
i a
..