ML19323C576
| ML19323C576 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 05/09/1980 |
| From: | Yundt C PORTLAND GENERAL ELECTRIC CO. |
| To: | |
| References | |
| IEB-79-13, NUDOCS 8005160356 | |
| Download: ML19323C576 (1) | |
Text
{{#Wiki_filter:_ r-Y -75 800516055b D REteut0 Portland General Electric Con'pany e Trojan Nuclear Plant y!gt 12 580 P.O. Bos 439 /d May 9, 1980 ~ b Rainier, Oregon 97048 / CPY-486-80 (503)556 3713 r. 's ' Mr. 2. H. Engelken, Director Nuclear Regulatory Commission 1990 North California Blvd. Walnut Creek, CA 94596
Dear Sir:
Subj ect: Immediate Report of Reportable Occurrence This letter is a followup to a report made by Mr. R. P. Schmitt, Engineering Supervi or, to Mr. M. H. Malmros, NRC Resident Inspector, at 3:00 pm, Thursday, May 8, 1980 concerning a discontinuity discovered during inspection for NRC IE Bulletin 79-13. It was determined that there is a discontinuity in Feedwater Line C which exceeds the acepetance standard for Class 2 pipe welds in the Trojan Plant Construction Code B31.7 (1969). The linear surface discontinuity discovered by radiography is at the 260* position when looking in the direction of the steam generator with O' being at the 12 o' clock (top of weld). The discontinuity is transverse to the weld, the 1.inear axis of the discontinuity is oriented axially with the pipe run. Total discontinuity length is 1.875 inches, width is 0.125 inch. For 1.563 inches of its length in the pipe material, the slag was removed. The remaining length, 0.312 inch, ending in the veld is filled with slag material. The appearance is that of an are being struck, and the weld rod being dragged for 1.875 inches. The radiograph suggests a discontinuity depth of.0.10 inch. We have prepared a Maintenance Request to remove the slag with a grinder leaving a wide gradual smooth depression. An examination of the ground surface with penetrant and a measurement of the remaining wall thickness ultrasonically will be made to determine if a weld repair is necessary. This weld area will be radiographed as a final inspection. Sincerely, .h C. P. Yundt y General Manager CP
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