ML19254E188
| ML19254E188 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 10/17/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7910310270 | |
| Download: ML19254E188 (1) | |
Text
pn Rico UNITED STATES
[(
ig NUCLEAR REGULATORY COMMISSION
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E REGION V b
1990 N. CALIFORNI A BOULEVARD D
SUITE 202, WALNUT CREEK PLAZA 4,
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WALNUT CREEK, CALIFORNI A 94596 October 17, 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. 79-13, Revision 2 which requires action by you with regard to your power reactor facility (ies).
Should you have any questions regarding this Bulletin or the actions re-quired by you, please contact thic office.
Sincerely,
[G d.62
~3 R. H. Engelken Director
Enclosures:
1.
IE Bulletin No. 79-13, Revision 2 2.
List of IE Bulletins Issued in the Last Six Months cc w/ enclosures:
C. P. Yui.dt, PGE F. C. Gaidos, PGE
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1248 014 23 0 7910310
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SSINS:
6830 Accession No.:
7908220135 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 October 16, 1979 IE Bulletin No. 79-13 Revision 2 CRACKING
'.N FEEDWATER SYSTEM PIPING Description of Circu.nstances:
This revision to IE Bulletin No. 79-13 is based on the results of the radio-graphic examinations and ongoing investigation of the subject problem to date since the initial Bulletin was issued.
The revision reduces in scope the R2 number and extent of the piping system welds required to be examined.
The requirements for reporting and action time frame remain unchanged.
On May 20, 1979, Indiana and Michigan Power Company notified the NRC of cracking in two feedwater lines at their D. C. Cook Unit 2 facility.
The cracking was discovered following a shutdown on May 19 to investigrte leakage inside containment.
Leaking circumferential cracks were identified in the 16-inch feedwater elbows adjacent to two steam generator nozzle elbow welds.
Subsequent radiographic examination revealed crack indications in all eight steam generator feedwater lines at this location on both Units 1 and 2.
On May 25, 1979, a letter was sent to all PWR licensees by the Office of Nuclear Reactor Regulation which informed licensees of the D. C. Cook failures and requested specific information on feedwater system design, fabrication, inspection and operating histories. To further explore the generi~c nature of the cracking problen, the Office of Inspection and Enforcement reques+ed licensees of PWR plants in current outages to immediately conduct volumetric examination of certain feedwater piping welds.
As a result of these actions, several other licensees with Westinghouse steam generators reported crack indications. Southern California Edison reported on June 5,1979, that radiographic examination revealed indications of cracking in feedwater nozzle-to-pipe welds on two of three steam generators of San Onofre Unit 1.
On June 15, 1979, Carolina Power and Light reported that radiography showed crack indications in similar locations at their H. B.
Robiason Unit 2.
Duquesne Power and Light confirmed on June 18,1979, that radiography has shown cracking in their Beaver Valley Unit 1 feedwater piping-to-vesse? nozzle weld.
Public Service Electric and Gas Company reported on June 20, 1979 that Salem Unit 1 also has Service company decided on June 20, 1979 weld which contained questionable indicat As of June 22, 1979 and since May 25, 197 DUPLICATE DOCUMENT inspected the feedwater nozzle-to-pipe we Entire document previously entered into systera under:
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NOTE:
R1 and R2 indicates lines revis ANO 1248 Ol&
a, no. of geyes:
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