ML19296A397
| ML19296A397 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Byron, Braidwood, Quad Cities, Zion, LaSalle  |
| Issue date: | 03/12/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7903190539 | |
| Download: ML19296A397 (1) | |
Text
(
e i
use d
UNITED STATES c
NUCLEAR REGULATORY COMMISSION I
j REGION ll!
e 799 ROOSEVELT ROAD OLEN E LLYN, ILLINots 60137 H2. 12.1979 Docket Nos. 50-10, 50-237, 50-249, 50-254, 50-265, 50-295, 50-304, 50-373, 50-374, 50-454, 50-455, 50-456 and 50-457 Commonwealth Edison Company ATTN:
Mr. Byron Lee, Jr.
Vice President Post Office Box 767 Chicago, IL 60690 Gentlemen:
Enclosed is IE Bulletin No. 79-03, which requires action by you with regard to your power reactor facilities with an operating license or a construction permit.
Should you have any questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely,
/
tu
/tJamesC Keppler [
Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/encls:
Mr. B. B. Stephenson, Mr. R. Cosaro, Project Station Superintendent Superintendent Mr. N. Kalivianakis, Central Files Station Superintendent Director, NRR/DPM Mr. N. Wandke, Station Director, NRR/ DOR Superintendent PDR Mr. L. J. Burke, Site Local PDR
~
Project Superintendent NSIC Mr. T. E. Quaka, Quality TIC Assurance Supervisor Anthony Roisman, Esq.,
Mr. R. H. Holyoak, Station Attorney Superintendent i
Mr. Dean Hansell, Office Mr. Gunner Sorensen, Site of Assistant Attorney Project Superintendent General 7903190 537
N U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EhTOPCEMEhT REGION III March 12, 1979 IE Bulletin No. 79-03 IANGITUDINAL WELD DEFECTS IN ASME SA-312 TYPE 304 STAINLESS STEEL FIPE SPOOLS MANUFAC'1VRED BY YOUNGSTOWN WELDING AND ENGINEERING COMPAh7 Description of Circumstances:
On September 27, 1978, the Arizona Public Service Company reported that defects had been discovered in longitudinal velds in ASME Section III class 2 pipe supplied for the Palo Verde Nuclear Generating Station (PVNGS). On November 17, 1978, the Southern California Edison Company reported similar defects in pipe supplied for the San Onofre Nuclear Generating Station, Units 2 and 3.
Pullman Power Products of Ios Angeles, California supplies safety-related fabricated piping spools of various diameters for the PVNGS.
The defects were discovered by Pullman in ASME SA-312 type 304 stainless steel pipe supplied to Pullman by Youngstown Welding and Engineering Cos:pany of Youngstown Ohio. The pipe is manufactured by rolling plate into cylinders and then fusich velding the longftudinal seam without filler metal.
Pullman discovered defects in the longitudinal velds while radiographing their circumferential shop welds. Further radiographic examlas:1e.n of the longitudinal velds revealed rejectable por"sity an3 la:k of f a f >1.
Pullman then performed ultrasonic examination of the full lengta ci :ne longitudinal velds and discovered indications exceeding the acceptance criteria of ASME Section III. Further ultrasonic examination revealed indications in other piping subassemblies where pipe was supplied by Youngstown. Two indications verified by radiography were identified as porosity and measured 0.350 inch by 0.125 inch in one case and 0.300 inch by 0.125 inch in another case in pipe with a nominal vall thickness of 0.375 inch.
The additional examinations revealed that of 103 spools and four pipe supports ahipped to PVNGS, 44 spools and one pipe support were found to contain ultrasonic indications exceeding those permitted by the ASME Code. Of 65 partially fabricated piping spools, 30 were found to be similarly defective. The acceptance criteria for the pipe supplied by Youngstown includes 100 percent ultrasonic examination of the longitudinal MP6 x
790316 013 g
.