ML19296A385
| ML19296A385 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 03/12/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7903190488 | |
| Download: ML19296A385 (1) | |
Text
n pic du o4,I UNITED STATES c
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WALNUT CREEK, C ALIFORNI A 9453G March 12, 1979 Docket No. 50-344 Portland General Electric Company 121 S. W. Salmon Street Portland, Oregon 97204 Attention:
Mr. Charles Goodwin Assistant Vice President Gentlemen:
Enclosed is IE Bulletin No. 79-03, which requires action by you with regard to your power reactor facility (ies) with an operating license or a construction permit.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely, 10%eL R. H. Engelken Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/ enclosures:
B. Withers, PGE F. C. Gaidos, PGE 7903190 @ 7
~
UNITED STAFES NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 March 12, 1979 IE Bulletin No. 79-03 LONGITUDINAL WELD DEFECTS IN ASME SA-312 TYPE 304 STAINLESS STEEL PIPE SP0OLS MANUFACTURED BY YOUNGSTOWN WELDING AND ENGINEERING COMPANY Description of Circumstances:
On September 27, 1978, the Arizona Public Service Company reported that defects had been discovered in longitudinal welds 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.
Pullran Power Products of Los Angeles, Califr.nia 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 Helding and Engineering Company of Youngstown, Ohio. The pipe is manufactured by rolling plate into cylinders and then fusion welding the longitudinal seam without filler metal.
Pullman discovered defects in the longitudinal welds while radiographing their circumferential shop welds.
Further radiographic examination of the longitudinal welds revealed rejectable porosity and lac.s of fusion.
Fullman then performed ultrasonic examination of the full length of the longitudinal welds 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 wall thickness of 0.375 inch.
The additional examinations revealed that of 103 spools and four pipe supports shipped 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 fcr the pipe supplied by Youngstown includes 100 percent ultrasonic exanination of the longitudinal l of 3 OdP6 7903160138