ML19256E450
| ML19256E450 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Vogtle  |
| Issue date: | 10/17/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | John Miller GEORGIA POWER CO. |
| References | |
| NUDOCS 7911070134 | |
| Download: ML19256E450 (2) | |
Text
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'o UNITED STATES 8
NUCLEAR REGULATORY COMMISSION y
e REGION 11 0
101 MARIETTA ST N.W..SulTE 3100 Yg.....
o A: LANTA, GEORGIA 30303 In Reply Refer To:
OCT 171979 RII:JPO 50-321 50; 66 50-424
~50-4251)
Georgia Power Company Attn:
J. H. Miller, Jr.
Executive Vice President 270 Peachtree Street, N.W.
Atlanta, Georgia 30303 Gentlemen:
The enclosed Bulletin No. 79-13 Revision 2 is forwarded to you for infor-mation. No written response is required.
If you desire additional informatio?
regarding this matter, please contact this office.
Sincerely,
\\
% ( C h r; ames P. O'Reilly rector
Enclosures:
1.
IE Bulletin No. 79-13, Rev on 2.
Listing of IE Bulletins Issued in Last Six Months 1"3 019 7911070
OCT 171979 Georgia Power Company.
cc w/ enc 1:
M. Manry, Plant Manager Post Office Box 442 Baxley, Georgia 3151' C. E. Belflower Site QA Supervisor Post Office Box 442 Baxley, Georgia 31513 K. M. Gillespie Construction Prc ect moger Post Office Box t82 Waynesboro, Georgia 30830 E. D. Groover QA Site Supervisor Post Office Box 282 Waynesboro, Georgia 30830 1
3 020
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 IN FEEDWATER SYSTEM PIPING Description of Circumstances:
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 weldr 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 10 to investigate leakage inside containment.
Leaking circumferential cracks were identified in the 16-inch feedwater elbows adjacent to two steam generater nozzle elbow welds.
Subsequent radiographic examination revealed crack indications in all eight steam generator feedwater lines at this location on both Unit. I 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 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.
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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 radiogrephic 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 Vallev W u 1 to-vessel nozzle weld. Public Service June 20, 1979 that Salem Unit I also ha Service company decided on June 20,197 weld which contained questionable indic4lE DUPLICATE DOCUMENT As of June 22, 1979 and since May 25, 1 inspected the feedwater nozzle-to pipe Entire document previously entered into system under:
ANO 1:0TE:
R1 and R2 indicates lines revi
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