ML19260B444
| ML19260B444 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Vogtle  |
| Issue date: | 11/16/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | John Miller GEORGIA POWER CO. |
| References | |
| NUDOCS 7912100184 | |
| Download: ML19260B444 (1) | |
Text
(k an arouq'o UNITED STATES 4
8_ g '(,,g NUCLEAR REGULATORY COMMISSION
'(
,e REGION ll g g%~ 1 '
o 101 MARIETTA ST N.W., SUITE 3100
%,..... o ATLANTA, GEORGIA 30303 NOV 161979 In Reply Refer To:
SG 24, P
Georgia Power Company Attn:
J. H. Miller, Jr.
Executive Vice President 270 Peachtree Street, N.W.
Atlanta, Georgia 30303 Gentlemen:
The enclosed IE Information Notice No. 79-28 provides information on the overloading of structural elements due to pipe support loads.
Sincerely, S
Wa
~
James P. O'Reilly Director
Enclosures:
1.
IE Information Notice No. 79-28 2.
Li,t of IE Information Notices Issued in the Last Six Months 1519 272 29121 uo N k
NOV 161979 4
Georgia Dower Company cc w/ enc 1:
M. Manry, Plant Manager Post Office Box 442 Baxley, Georgia 31513 C. E. Belflower Site QA Supervisor Post Office Box 442 Baxley, Georgia 31513 K. M. Gillespie Construction Project Manager Post Office Box 282
.Waynesboro, Georgia 30839 E. D. Groover QA Site Supervisor Post Office Box 282 Waynesboro, Georgia 30830 i5i9 273
t SSINS No.:
6870 Accession No.: 79102504 5 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 November 16, 1979 IE Information Notice No. 79-28 OVERLOADING OF STRUCTURAL ELEMENTS DUE TO PIPE SUPPORT LOADS Description of Circumstances:
Recently, the NRC was informed that, in the course of the inspections pursuant to IE Bulletin No. 79-02 and 79-14 by the Portland General Electric Co. (PGE) at the Trojan Nuclear Plant, some walls were found which did not have adequate structural strength to sustain the required support reactions.
Bechtel Corporation was the Architect Engineer for the plant. These structural inadequacies were reported to be attributable to two deficiencies:
1)
Apparent lack of a final check of certain pipe support locations and reactions to ensure that the supporting structural elements possessed adequate structural integrity to sustain the required loads.
2)
Inadequate design criteria for the reactions from supports anchored into the face of concrete block walls; e.g., relying on the combined strength of double concrete block walls without positive connection between the two valls by means other than the bond provided by a layer of grout between them.
The NRC is currently pursuing these issues in detail for the Trojan Nuclear Plant to determine the extent of these deficiencies and the generic implications for other Bechtel facilities.
This Information Notice is provided as an early notification of a possible signif-icant matter.
It is expected that recipients will review the information for possible applicability to their facilities and the actions being performed under IE Bulletin No. 79-02.
Specific action is being requested relating to the adequacy of attachments to concrete block walls under IE Bulletin No. 79-02, Revision 2, item 5.c.
No specific actions are requested in response to this Information Notice.
If NRC evaluations so indicate, further licensee actions may,be requested or required.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this IE Information Notice is required.
15i9 274
4 IE Information Notice No. 79-28 Enclosure November 16, 1979 Page 1 of 2 LISTING OF IE INFORMATION NOTICES ISSUED IN THE LAST SIX MONTHS Information Subject Date Issued To Notice No.
Issued 79-28 Overloading of Structural 11/16/79 All power reactor Elements Due to Pipe Sup-facilities holding port Loads OLs and cps 79-27 Steam Generator Tube 11/16/79 All power reactsr Ruptures at Two PWR facilities holding Plants OLs and cps 79-26 Breach of Containment 11/5/79 All power reactor Integrity facilities holding OLs and cps 79-25 Reactor Trips at Turkey 10/1/79 All power reactor Point Units 3 and 4 facilities holding OLs and cps 79-24 Overpressurization of 10/1/79 All power reactor Containment of a PWR facilities holding Plant After a Main Steam OLs and cps Line Break 79-23 Emergency Diesel Generator 9/26/79 All Holders of cps Lube Oil Coolers and OLs 79-22 Qualification of Control 9/17/79 All Holders of cps Systems 9/14/79 All Holders of OLs 79-21 Transportation and Commer-9/11/79 All Licensees as Supple-cial Burial of Radioactive mental Information to Materials IE Bulletin Nos. 79-19
& 79-20 79-20 NRC Enforcement Policy 9/7/79 All Holders of Reactor (Rev. 1)
NRC Licensed Individuals OLs and cps and Production Licensees with Licensed Operators 79-20 NRC Enforcement Policy 8/14/79 All Holders of Reactor NRC Licensed Individuals OLs and cps and Production Licensees with Licensed Operators 1519 275
1 IE Info:mation Notice No. 79-28 Enclosure November 16, 1979 Page 2 of 2 LISTING OF INFORMATION NOTICES ISSUED IN THE LAST SIX MONTHS Information Subject Date Issued To Notice No.
Issued 79-19 Pipe Cracks in Stagnant 7/18/79 All Holders of Reactor (Correction - Borated Water Systems at OLs and cps Enclosure)
PWR Plants 79-19 Pipe Cracks In Stagnant 7/17/79 All Holders of Reactor Borated Water Systems At OLs and cps PWR Plants 79-18 Skylab Reentry 7/6/79 All Holders of Reactor OLs 79-17 Source Holder Assembly Damage 6/20/79 All Holders of Reactor Damage From Misfit Between OLs and cps Assembly and Reactor Upper Grid Plate 79-16 Nuclear Incident at Three 6/22/79 All Research Reactors Mile Island and Test Reactors with OI 79-15 Deficient Procedures 6/7/79 All Holders of Reactor-OLs and cps 79-14 NRC Position of Electrical 6/11/79 All Power Reactor Cable Support Systems Facilities with a CP 79-12A Attempted Damage to New 11/9/79 All Fuel Facilities, Fuel Assemblies Research Reactors, and OLs and cps 15i9 276