ML19282C179
| ML19282C179 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 03/12/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Stampley N MISSISSIPPI POWER & LIGHT CO. |
| References | |
| NUDOCS 7903210145 | |
| Download: ML19282C179 (1) | |
Text
UNITED STARES
/g Meg NUCLEAR REGULATORY COMMIS$10N o,,
8 REGloN 11 o
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101 MARIETTA STRE ET, N.W.
ATLAETA, otoRot A 30303 g
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}AAR 121979 In Reply Refer To:
RII:JPO 50-416, 50-417 Mississippi Power and Light Company Attn:
Mr. Norris L. Stampley Vice President of Production P. O. Box 1640 Jackson, Mississippi 39205 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, gg James P. O'Reilly Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/ enc 1:
W. L. Nail, Plant Cuperintendent P. O. Box 756 Port Gibson, Mississippi 39150 7903210145
UNITED STATES NUCLEAR REGULATORY C0!GiISSION OFFICE OF IN3PECTION AND ENFORCE!ENT 5
WASHINGTON, D.C.
20555 March 12, 1979 IE Bulletin No. 79-03 LONGITUDINAL WELD DEFE7IS IN ASME SA-312 TYPE 30h STAINLESS STEEL PIPE 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 velds in ASP 2 Section III class 2 pipe supplied for the Palo Verde Nuclear Generating Station n
(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 Los 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 30L stainfess steel pipe supplied to Pullman by Youngstown Welding and Engineering Company of Youngstown, Ohio. The pipe is manufactured by rolling plate into cylinders and then fusion velding the longitudinal seam without filler metal.
Pullman discovered defects in the longitudinal velds while radiographing 8
their circumferential shop velds. Further radiographic examination of the longitudinal velds revealed rejectable porosity and lack of fusion.
Pullman then performed ultrasonic examination of the full length of the
.x longitudinal velds and discovered indications exceeding the acceptance
/
criteria of ASME Section III. Further ultrasonic examination
- revealed indications in other piping cubassemblies where pipe was supplied by Two indications verified by radiography were identified as Youngstown.
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 yipe with a nominal vall thickness of 0.375 inch.
The additional examinations revealed that of 103 spools and four pipe supports shipped to PVNGS, hk spools and one pipe support vere found to contain ultrasonic indications exceeding those permitted by the AS!G 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 of 3
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