ML19254F190
| ML19254F190 | |
| Person / Time | |
|---|---|
| Site: | 05000363 |
| Issue date: | 10/17/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Finfrock I JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| NUDOCS 7911070300 | |
| Download: ML19254F190 (1) | |
Text
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UNITED STATES
[ $, 's q2' j NUCLEAR REGULATOR ( COMMISSION 3, V ':EI/
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'g KING OF PRUSSIA, PENNSYLVANIA 1940G October 17, 1979 Docket No. 50-363 Jersey Central Power & Light Company ATTN: Mr. I. R. Finfrock, Jr.
Vice President 260 Cherry Hill Road Parsippany, New Jersey 07054 Gentlemen:
The enclosed IE Bulletin 79-13, Revision 2, is forwarded to you for information. No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely,
&VK oyce H. Grier Director
Enclosures:
1.
IE Bulletin No. 79-13 w/ Attachments 2.
Listing of IE Bulletins Issued in Last 6 Months cc w/encls:
M. K. Pastor, Project Manager 1289
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CONTACT:
L. E. Tripp 337-5282
' 7911070300 O
ENCLOSURE 1 SSINS:
6830 Accession No.:
7908220135 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 October 17, 1979 IE Bulletin No. 79-13 Revision 2 Page 1 of 5 CRACKING IN FEEDWATER SYSTEM PIPING Description of Circumstances:
This revision to IE Bulletin No. 79-13 is based on the results of the radiographic examinations and ongoing investigation of the subject problem to date since the initial Bu.letin was issued.
The revision reduces in sccpe the number and R2 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 investigate leakage inside contain-ment.
Leaking circumferential cracks were identified in the 15-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 Uaits 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, inspec-tion and operating histories.
To further explore the generic nature of the cracking problem, the Office of Inspection and Enforcement requested 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. Robinson 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-vessel nozzle weld.
Public Service Electric and Gas Company rep t Salem Unit 1 also has crack indications.
Wiscon June 20, 1979 to cut out a feedwater nozzi able indication, for metallurgical examina May 25, 1979 seven other PWR facilities ha cup ICATE DOCUMENT pipe welds without finding cracking indica Entire d NOTE: R1 and R2 indicates lines revised entered into system under:nt previously hEh l[
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