ML19289D938
| ML19289D938 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 03/12/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Borgmann E CINCINNATI GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7903190544 | |
| Download: ML19289D938 (1) | |
Text
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UNITED STATES w
4 NUCLEAR REGULATORY COMMISSION f
D) h REGION Ill t
799 ROOSEVELT ROAD g,,, aq GLEN ELLYN,1LLINots 60137 NR 1?. 1979 Docket No. 50-358 Cincinnati Gas and E.1.ectric Company ATTN:
Mr. Earl A. Borgmann Vice President Engineering Services and Electric Production 139 East 4th Street Cincinnati, OH 45201 Gentlemen:
Enclosed is IE Bulletin No. 79-03, which requires action by you with regard to your power reactor facility with an cperating license or a construction permit.
Should you have any questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, wO.
James G. Keppler Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/encis:
Mr. J. R. Schott, Plant Superintendent Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC U. Young Park, Power Siting Commission Citizens Against a Radicactive Environment 7903190 59"/
3-....-
,f U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT j
. REGION III March 12, 1979 IE Bulletin No. 79-03 14NGITUDINAL WELD DEFECTS IN ASME SA-312 TYPE 304 STAINLESS STEEL FIPE SPOOLS 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.
Pullman Power Products of Ios Angeles, California supplies safety-ralated fabricated piping spools of various dismeters for the PVNGS.
The defects were discovered by Pullman in ASME SA-312 type 304 stainless steel pipe supplied to Pullman bw Y~.=tstown Welding and Engineering Company of Youngstown, Ohio. Tb4 pipe is :-=nufactured by rolling plate into cylinders and then fusich wlding the Jongf tudinal seam without filler metal.
Pullman disu vered defects in t se longitudinal welds while radiographing their circumferential shop welds. Further radiographic examlaa:icn of the longitudinal velds revealei, rejectable por"sity an3 la:k of f n!>1.
Pullman then performed ultrasonic examinstion of the fu't! lengta c1 :ne longitudinal welds and discovered indications exceeding the acceptance criteria of ASME Section III. Further ultrasonic examination revealed indications in >ther piping atbassemblies where pipe was supplied by Youngstown. Two indications verified by radiography were identified as Porosity and measured 0.350 it.ch by 0.125 iach in one case and 0.300 inch by 0.125 inch in another case in pipe v!th a nominal wall *hickness of 0.375 inch.
The additional examinations r evealed that of 103 spools and four pipe supports shipped to PVNGS, 4A spools and one pipe support were found to contain ultrasonic indicatiot,3 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 1
6 NP 790316 013 g
.