ML19207C195
| ML19207C195 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 08/30/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 7909100236 | |
| Download: ML19207C195 (2) | |
Text
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'o UNITED STATES y
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NUCLEAR REGULATORY COMMISSION c WD O, O
.E REGION 11 "o,
f 101 MARIETTA ST., N.W., SUITE 3100
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ATLANTA, G EORGI A 30303 In Reply Refer To:
RII:JPO 50-339 Virginia Electric and Power Company Attn:
W. L. Proffitt Senior Vice President, Power Post Office Box 26660 Richmond, Virginia 23261 Gentlecen:
Enclosed is IE Bulletin 79-13, Revision 1 which requires action by you with regard to your power reactor f acility(ies) identified in Enclosure 3.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely,
'Q w
James P. O' Reil y Director
Enclosures:
1.
IE Bulletin No. 79-13, Revision 1 2.
List of IE Bulletins Issued in Last Six Months 3.
Designated Applicants for Operating Licenses OUOOl[g 7909100 b b uneumM
AUC 3 0,
Virginia Electric and Power Company cc w/ enc 1:
W. R. Cartwright, Station Manager Post Office Box 402 Mineral, Virginia 23117 P. G. Perry Senior Resident Engineer Post Office Box 38 Mineral, Virginia 23117
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Accession No: 7908220101 SSINS No.
6830 LWITED STATES NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 August 30, 1979 IE Bulletin No. 79-13 Revision 1 CRACKING IN FEEDWATER SYSTEM PIPIN3 Description of Circumstances:
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 discoverec following a shutdown on May 19 to investigate 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 PkR 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 rature 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 piping 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 Juae 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 reported on June 20, 1979 that Salem Unit 1 also has crack indications. Wisconsin Public Service company decided on June 20, 1979 to cut out a feedwater nozzle-to pipe weld which ccatained questionable indication, for metallurgical examination.
As of June 22, 1979 and since May 25, 1979 seven other PhR facilities have inspected the feedwater nozzle-to pipe e s
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indications.
4 jDUPLICATE DOCUMENT g
The feedwater nozzle-to pipe configurat ;
are shown on the attached figures 1 and JEntire document previously entered j
weld joint detail showing the principal 3 into system under:
Onofre are shown on the attached figure ;
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