ML15224A235
| ML15224A235 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/28/1993 |
| From: | Wiens L Office of Nuclear Reactor Regulation |
| To: | Hampton J DUKE POWER CO. |
| References | |
| TAC-M81537, TAC-M81538, TAC-M81539, NUDOCS 9305040227 | |
| Download: ML15224A235 (3) | |
Text
April 28, 1993 Docket Nos. 50-269, 50-270 DISTRIBUTION and 50-287
[Docket-
-ilei S. Varga NRC/Local PDRs G. Lainas Mr. J. W. Hampton D. Matthews L. Wiens, Vice President, Oconee Site L. Berry OGC Duke Power Company E. Merschoff,RII ACRS (10)
P. 0. Box 1439 Seneca, South Carolina 29679
Dear Mr. Hampton:
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 - USE OF ORIFICE PLUGS FOR STEAM GENERATOR TUBES (TAC NOS.
M81537, M81538, AND M81539)
By letter dated September 3, 1991, Duke Power Company submitted a request for an interpretation of the Oconee Nuclear Station, Units 1, 2, and 3 Steam Generator Technical Specifications concerning the potential future use of orifice plugs.
The orifice plugs were proposed as a backup method of plugging previously installed explosive plugs in which crack indications had been identified. The preferred method of sealing defective plugs was.using a remotely operated milling and welding machine. At the time of your submittal, this was the first use of this equipment in actual steam generator work, so planning for a backup method was prudent.
It is our understanding that the remotely operated equipment has now been successfully used in repairing defective plugs in the Oconee steam generators, thus, eliminating the need for the orifice plugs. The NRC staff is in the process of developing new criteria and requirements with respect to steam generator tube inspection and repair, including plugging criteria. The requested Technical Specification interpretation would be impacted by this new generic criteria. Since there is no immediate operational need at Oconee Nuclear Station for the use of these plugs, the staff has discontinued its review of this matter. It will be considered in the new generic.criteria.
If you have questions regarding this matter, contact me at (301) 504 1495. This completes our efforts under TAC Nos. M81536, M81537, and M81538.
Sincerely,
/s/
L. A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:
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R0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 April 28, 1993 Docket Nos. 50-269, 50-270 and 50-287 Mr. J. W. Hampton Vice President, Oconee Site Duke Power Company P. 0. Box 1439 Seneca, South Carolina 29679
Dear Mr. Hampton:
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 -
USE OF ORIFICE PLUGS FOR STEAM GENERATOR TUBES (TAC NOS. M81537, M81538, AND M81539)
By letter dated September 3, 1991, Duke Power Company submitted a request for an interpretation of the Oconee Nuclear Station, Units 1, 2, and 3 Steam Generator Technical Specifications concerning the potential future use of orifice plugs. The orifice plugs were proposed as a backup method of plugging previously installed explosive plugs in which crack indications had been identified. The preferred method of sealing defective plugs was using a remotely operated milling and welding machine. At the time of your submittal, this was the first use of this equipment in actual steam generator work, so planning for a backup method was prudent.
It is our understanding that the remotely operated equipment has now been successfully used in repairing defective plugs in the Oconee steam generators, thus, eliminating the need for the orifice plugs. The NRC staff is in the process of developing new criteria and requirements with respect to steam generator tube inspection and repair, including plugging criteria. The requested Technical Specification interpretation would be impacted by this new generic criteria. Since there is no immediate operational need at Oconee Nuclear Station for the use of these plugs, the staff has discontinued its review of this matter. It will be considered in the new generic criteria.
If you have questions regarding this matter, contact me at (301) 504 1495. This completes our efforts under TAC Nos. M81536, M81537, and M81538.
Sincerely, L. A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects -
I/II Office of Nuclear Reactor Regulation cc: See next page
Mr. J. W. Hampton Duke Power Company Oconee Nuclear Station cc:
Mr. A. V. Carr, Esquire Mr. M. E Patrick Duke Power Company Compliance 422 South Church Street Duke Power Company Charlotte, North Carolina 28242-0001 Oconee Nuclear Site P. 0. Box 1439 J. Michael McGarry, III, Esquire Seneca, South Carolina 29679 Winston and Strawn 1400 L Street, NW.
Mr. Alan R. Herdt, Chief Washington, DC 20005 Project Branch #3 U. S. Nuclear Regulatory Commission Mr. Robert B. Borsum 101 Marietta Street, NW. Suite 2900 Babcock & Wilcox Atlanta, Georgia 30323 Nuclear Power Division Suite 525 Ms. Karen E. Long 1700 Rockville Pike Assistant Attorney General Rockville, Maryland 20852 North Carolina Department of Justice Manager, LIS P. 0. Box 629 NUS Corporation Raleigh, North Carolina 27602 2650 McCormick Drive, 3rd Floor Clearwater, Florida 34619-1035 Mr. G. A. Copp Licensing -
ECO50 Senior Resident Inspector Duke Power Company U. S. Nuclear Regulatory Commission P. 0. Box 1006 Route 2, Box 610 Charlotte, North Carolina 28201-1006 Seneca, South Carolina 29678 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, NW. Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 County Supervisor of Oconee County Walhalla, South Carolina 29621