ML19260B433
| ML19260B433 | |
| Person / Time | |
|---|---|
| Site: | Perkins, Cherokee  |
| Issue date: | 11/16/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Dail L DUKE POWER CO. |
| References | |
| NUDOCS 7912100166 | |
| Download: ML19260B433 (1) | |
Text
~
/0 1
- pn nuo u
'o UNITED STATES NUCLEAR REGULATORY COMMISSION
, 3 g g
'j.. r REGION il
~
[
101 MARlETTA ST., N.W., SUITE 3100 o,
g ATLANTA, GEORGIA 30303 NOV 161979 In Reply Refer To:
RTT t TVO 88, 6 89 ;
50-490,-
0-491
cTO-492 0-493 Duke Power Company Attn:
L. C. Dail, Vice President Design Engineering Post Office Box 33189 Charlotte, North Carolina 28242 Gentlemen:
The enclosed IE Information Notice No. 79-28 provides information on the overloading of structural elements due to pipe support loads.
Sincerely, (Nw ___;g p 'A JamesP.O'Reillyj Director
Enclosures:
1.
IE Information Notice No. 79-28 2.
List of IE Information Notices Issued in the Last Six Months 1518 067 7912100 / 6 8 O
NOV 161979 Duke Power Company cc w/ enc 1:
J. T. Moore, Project Manager Post Office Box 422 Gaffney, South Carolina 29340 1518 068
SSINS No.:
6870 Accession No.: 79102504I5 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENv0RCEMEN1 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 o. 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 walls 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 tra 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 a y.be requerted 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.
1518 069
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.
Issue (
79-28 Overloading of Structural 11/16/79 All power reactor Elements Due to Pipe Sup-facilities holding port Loads 6Ls and cps 79-27 Steam Generator Tube 11/16/79 All power reactor 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 Il 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
IE Inf,rmation 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 Rea.: tor (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 OLs 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 1518 071