ML19256E452
| ML19256E452 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/17/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mary Johnson SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7911070143 | |
| Download: ML19256E452 (2) | |
Text
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uq*o, UNITED STATES E
NUCLEAR REGULATORY COMMISSION o
,E REGION ll
%..... e'['
g 101 MARIETTA ST N.W.. SUITE 3100 ATLANTA. GEORGIA 30303 In Reply Refer To:
OCT 171979 RII:JP0 9
South Carolina Electric and Gas Company Attn:
M. C. Johnson, Vice President Special Services and Purchasing P. O. Box 764 Columbia, South Carolina 29218 e
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 required by you, please contact this office.
Sincerely, 0 b. 4 t
3
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w\\
mes P. O'Reilly D ector
Enclosures:
1.
IE Bulletin No. 79-13, Revision 2 w/ Attachments 2.
List of IE Bulletins Issued in Last Six Months 1 " 3 022 7911010
OCT 171979 South Carolina Electric and Gas Company cc w/ enc 1:
T. B. Conners, Jr.
Conners, Moore and Corber 1747 Pennsylvania Avenue, N.W.
Washington, D.C.
20006 A. A. Smith Quality Assurance Post Office Box 8 Jenkinsville, South Carolina 29065 S. Bradham, Manager Nuclear Operations Post Office Box 8 3nkinsville, South Carolina 29065
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 welds required to be examined.
The requirer 2ts for reporting and action time frame remain unchanged.
On May 20, 1979, Indiana and Michigan Powe. 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 containment.
Leaking circumferential cracks were identified in the 16-inch feedwate; 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 generic nature of the cracking problem, the Office of Inspection and Snforcement requested licensees of PWR plants in current outages to immeuiately 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
- liography showed crack indications in similar locations at their H. B.
Rooinson Unit 2.
Duquesne Power and Light confirmed on June 18, 1979, that radiography has shown cracking in their to-vessel nozzle weld. Public Service E June 20, 1979 that Salem Unit I also has Service company decided on June 20, 1979 DU5sICATE DOCUbusNT weld which contained questionable indica As of June 22, 1979 and since May 25, 19 Entire doctnnent previously inspected the feedwater nozzle-to-pipe w entered into system under:
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NOTE:
R1 and R2 indicates lines revis No. of pages:
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