ML15261A251
| ML15261A251 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/08/1999 |
| From: | Joseph Sebrosky NRC (Affiliation Not Assigned) |
| To: | NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9904140129 | |
| Download: ML15261A251 (3) | |
Text
April 8, 1999 LICENSEE:
Duke Energy Corporation (Duke)
FACILITY:
Oconee Nuclear Station, Units 1, 2, and 3
SUBJECT:
SUMMARY
OF APRIL 1, 1999, PHONE CALL BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION (NRC) STAFF AND DUKE REPRESENTATIVES TO DISCUSS THE OCONEE LICENSE RENEWAL APPLICATION On April 1, 1999, representatives of Duke had a phone call with the NRC staff in Rockville, Maryland, to discuss the Oconee license renewal application. The purpose of the phone call was to discuss Duke's response to request for additional information (RAI) 3.4.11-7. The Duke participants were Robert Gill, Greg Robison, and Mark Pyne. The staff participants were Renee Li, Jim Davis, and Joe Sebrosky.
In the response to RAI 3.4.11-7 Duke stated that "the complete failure scenario of the subject weld in the drain line off the pressurizer surge line is crack initiation by stress corrosion cracking and propagation by a mixed-mode of stress corrosion cracking and vibrational fatigue." Duke's response provided the basis for why the vibration in and of itself would not cause failure, and why no corrective actions were required to mitigate any mechanical vibration effects. However, the staff noted that Duke did not discuss the corrective actions taken to address stress corrosion cracking for this failure scenario. Therefore, it was not clear to the staff what the basis is for the concluding statement of the RAI response that "the reinstalled configuration is adequate for the period of extended operation." The staff believed that Duke should address what corrective actions were taken regarding stress corrosion cracking in this failure scenario.
During the phone call, Duke stated that the information that the staff was looking for could be found in two letters that were submitted to the staff. The first letter, dated February 26, 1998, submitted licensee event report (LER) 269/98-02. The LER concerned the non-isolable weld leak on the pressurizer surge line drain pipe that was the subject of RAI 3.4.11-7. The second letter, dated April 30, 1998, provided revision 1 to LER 269/98-02. The revision supplemented the LER to indicate the results of the metallurgical analysis on the failed weld. Duke stated there was no evidence of internal stress corrosion cracking. The cracking was the result of externally initiated stress corrosion cracking. The staff stated that if any additional information is required, it will identify the information in a future call, or in the safety evaluation report for the Oconee license renewal application.
A draft of this meeting summary was provided to Duke to allow them the opportunity to comment 0
on the summary prior to issuance.
original signed by:
Joseph M. Sebrosky, Project Manager License Renewal and Standardization Branch Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287 cc: See next page DISTRIBUTION: See next page DOCUMENT NAME:G:\\SEBROSKY\\4-1PHNR.WPD OFFICE LA PDLR/DRIP:PM PDLR:D NAME JSebrosky ClGrime
[DATE 199
/ / 199 4//99 OFFICIAL RECORD COPY 9904140129 990408 PDR-ADOCK 05000269 P
_PDR__
Oconee Nuclear Station (License Renewal) cc:
Mr. J. E. Burchfield Ms. Lisa F. Vaughn Compliance Manager Duke Energy Corporation Duke Energy Corporation 422 South Church Street Oconee Nuclear Site Mail Stop PB-05E P. 0. Box 1439 Charlotte, North Carolina 28201-1006 Seneca, South Carolina 29679 Anne W. Cottingham. Esquire Ms. Karen E. Long Winston and Strawn Assistant Attorney General 1400 L Street. NW.
North Carolina Department of Justice Washington, DC 20005 P. D. Box 629 Raleigh. North Carolina 27602 Mr. Rick N. Edwards Framatome Technologies L. A. Keller Suite 525 Manager - Nuclear Regulatory Licensing 1700 Rockville Pike Duke Energy Corporation Rockville, Maryland 20852-1631 526 South Church Street Charlotte, North Carolina 28201-1006 Manager. LIS NUS Corporation Mr. Richard M. Fry, Director 2650 McCormick Drive. 3rd Floor.
Division of Radiation Protection Clearwater. Florida 34619-1035 North Carolina Department of Environment, Health, and Senior Resident Inspector Natural Resources U. S. Nuclear Regulatory Commission 3825 Barrett Drive 7812B Rochester Highway Raleigh, North Carolina 27609-7721 Seneca. South Carolina 29672 Gregory D. Robison Regional Administrator, Region II Duke Energy Corporation U. S. Nuclear Regulatory Commission Mail Stop EC-12R Atlanta Federal Center P. 0. Box 1006 61 Forsyth Street. SW. Suite 23T85 Charlotte, North Carolina 28201-1006 Atlanta, Georgia 30303 Robert L. Gill, Jr.
Virgil R. Autry, Director Duke Energy Corporation Division of Radioactive Waste Management Mail Stop EC-12R Bureau of Land and Waste Management P. 0. Box 1006 Department of Health and Charlotte, North Carolina 28201-1006 Environmental Control RLGILL@DUKE-ENERGY.COM 2600 Bull Street Columbia, South Carolina 29201-1708 Douglas J. Walters Nuclear Energy Institute County Supervisor of Oconee County 1776 1 Street, NW Walhalla, South Carolina 29621 Suite 400 Washington, DC 20006-3708 W. R. McCollum. Jr.. Vice President DJW@NEI.ORG Oconee Site Duke Energy Corporation Chattooga River Watershed Coalition P. 0. Box 1439 P. 0. Box 2006 Seneca, SC 29679 Clayton, GA 30525
Distribution:
Hard copy PUBLIC Docket File RLSB RF N. Dudley, ACRS - T2E26 EHylton E-mail; R. Zimmerman Y. Li W. Kane J. Davis D. Matthews S. Newberry C. Grimes C. Carpenter B. Zalcman J. Strosnider R. Wessman E. Imbro W. Bateman J. Calvo H. Brammer T. Hiltz G. Holahan T. Collins C. Gratton B. Boger R. Correia R. Latta J. Moore J, Rutberg R. Weisman M. Zobler M. Mayfield S. Bahadur A. Murphy D. Martin W. McDowell S. Droggitis RLSB Staff R. Emch D. LaBarge L. Plisco C. Ogle R. Trojanowski M. Scott C. Julian J. Peralta J. Wilson C. Sochor