ML080040292
| ML080040292 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 01/29/2008 |
| From: | Catherine Haney Plant Licensing Branch III-2 |
| To: | Pardee C AmerGen Energy Co |
| Bamford, Peter J., NRR/DORL 415-2833 | |
| References | |
| TAC MD4191, NRR-07-029 | |
| Download: ML080040292 (5) | |
Text
January 29, 2008
Mr. Charles G. Pardee Chief Nuclear Officer AmerGen Energy Company, LLC 200 Exelon Way Kennett Square, PA 19348
SUBJECT:
THREE MILE ISLAND NUCLEAR STATION, UNIT 1 - ACKNOWLEDGMENT OF ACTIONS TAKEN FOR CONFIRMATORY ACTION LETTER NRR-07-029 (TAC NO. MD4191)
Dear Mr. Pardee:
On March 22, 2007, the U.S. Nuclear Regulatory Commission (NRC) issued Confirmatory Action Letter (CAL) No. NRR-07-029 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070740631) regarding dissimilar metal welds in the pressurizer at Three Mile Island Nuclear Station, Unit 1 (TMI-1). This letter acknowledges receipt of your letter dated December 4, 2007 (ADAMS Accession No. ML073390388) informing the NRC of actions taken in response to this CAL.
In your letter, you stated that during November 2007, TMI-1 replaced the pressurizer safety/relief nozzle butt welds with Primary Water Stress Corrosion Cracking (PWSCC) resistant material and welds and installed a full structural weld overlay repair on the pressurizer surge nozzle. In addition, TMI-1 inspected the pressurizer spray nozzle-to-safe end and safe end-to-elbow welds with Performance Demonstration Initiative (PDI) qualified ultrasonic examination techniques.
The ultrasonic examinations obtained 100-percent coverage and no degradation was identified.
Based on your letter, the NRC understands that the pressurizer safety/relief nozzle butt welds have been replaced with PWSCC resistant material and welds, the pressurizer surge nozzle has been mitigated with a full structural weld overlay, and the pressurizer spray nozzle-to-safe end weld and safe end-to-elbow weld have been examined with PDI-qualified techniques in which 100-percent coverage was obtained and no degradation was identified. This completes portions of the commitments listed in the CAL and supporting commitment letter dated February 21, 2007 (ADAMS Accession No. ML070520499). As a result of these actions, it is no longer necessary to implement enhanced inspection and leakage monitoring requirements for the reactor coolant system. The commitment to reexamine unmitigated welds, using ultrasonic techniques, within every 4 years remains open. The CAL will remain open until all commitments are completed. However, based on actions completed to date, TAC No. MD4191 will be closed. Additional TACs will be opened, as needed, to review fu ture actions.
Thank you for informing us of the actions documented in your letter. These actions may be examined during a future NRC inspection of your facility.
Current NRC guidance regarding CALs is contained in the NRC Enforcement Policy and the NRC Enforcement Manual, which are available on the NRC web site at http://www.nrc.gov/about-nrc/regulatory/enforcement.html (click on Enforcement Policy or Enforcement Guidance) or by contacting the Government Printing Office (GPO) toll-free at 1-888-293-6498. The GPO is open from 7:00 a.m. to 9:00 p.m. EST, Monday through Friday (except Federal holidays).
In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and your response will be made available electronically for public inspection in t he NRC Public Document Room or from the NRC
=s document system (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm.html.
Sincerely, /ra/
Catherine Haney, Director Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
Docket No. 50-289
cc: See next page
ML080040292 OFFICE DCI/CPNB DCI/CPNB LPL1-2/PM LPL1-2/LA LPL1-2/BC
NAME TLupold TChan PBamford ABaxter HChernoff
DATE 1/08/08 1/16/08 1/04/08 1/08/08 1/24/08 OFFICE DCI/D DRP/D R1 DORL/D NAME MEvans DLew CHaney DATE 1/17/08 1/14/08 1/29/08 Three Mile Island Nuclear Station, Unit 1
cc:
Site Vice President - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P. O. Box 480 Middletown, PA 17057
Vice President - Operations, Mid-Atlantic AmerGen Energy Company, LLC 200 Exelon Way, KSA 3-N Kennett Square, PA 19348
Vice President - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555
Regional Administrator Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406
Chairman Board of County Commissioners of Dauphin County Dauphin County Courthouse Harrisburg, PA 17120
Chairman Board of Supervisors of Londonderry Township R.D. #1, Geyers Church Road Middletown, PA 17057
Senior Resident Inspector (TMI-1)
U.S. Nuclear Regulatory Commission P.O. Box 219 Middletown, PA 17057
Director - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348
Director Bureau of Radiation Protection Pennsylvania Department of Environmental Protection Rachel Carson State Office Building P.O. Box 8469 Harrisburg, PA 17105-8469
Plant Manager - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P. O. Box 480 Middletown, PA 17057
Regulatory Assurance Manager - Three Mile Island Nuclear Station, Unit 1 AmerGen Energy Company, LLC P.O. Box 480 Middletown, PA 17057
Ronald Bellamy, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406
Michael A. Schoppman Framatome ANP Suite 705 1911 North Ft. Myer Drive Rosslyn, VA 22209
Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803
Eric Epstein TMI Alert
4100 Hills dale Road Harrisburg, PA 17112
Correspondence Control Desk AmerGen Energy Company, LLC P.O. Box 160 Kennett Square, PA 19348 Three Mile Island Nuclear Station, Unit 1
cc:
Manager Licensing - Three Mile Island Nuclear Station, Unit 1 Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348
Mr. Charles G. Pardee Chief Nuclear Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555
Assistant General Counsel AmerGen Energy Company, LLC 200 Exelon Way Kennett Square, PA 19348
Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555