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 future 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.
C. Pardee 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 the 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 Director Station, Unit 1 Bureau of Radiation Protection AmerGen Energy Company, LLC Pennsylvania Department of P. O. Box 480 Environmental Protection Middletown, PA 17057 Rachel Carson State Office Building P.O. Box 8469 Vice President - Operations, Mid-Atlantic Harrisburg, PA 17105-8469 AmerGen Energy Company, LLC 200 Exelon Way, KSA 3-N Plant Manager - Three Mile Island Nuclear Kennett Square, PA 19348 Station, Unit 1 AmerGen Energy Company, LLC Vice President - Licensing and Regulatory Affairs P. O. Box 480 AmerGen Energy Company, LLC Middletown, PA 17057 4300 Winfield Road Warrenville, IL 60555 Regulatory Assurance Manager - Three Mile Island Nuclear Station, Unit 1 Regional Administrator AmerGen Energy Company, LLC Region I P.O. Box 480 U.S. Nuclear Regulatory Commission Middletown, PA 17057 475 Allendale Road King of Prussia, PA 19406 Ronald Bellamy, Region I U.S. Nuclear Regulatory Commission Chairman 475 Allendale Road Board of County Commissioners King of Prussia, PA 19406 of Dauphin County Dauphin County Courthouse Michael A. Schoppman Harrisburg, PA 17120 Framatome ANP Suite 705 Chairman 1911 North Ft. Myer Drive Board of Supervisors Rosslyn, VA 22209 of Londonderry Township R.D. #1, Geyers Church Road Dr. Judith Johnsrud Middletown, PA 17057 National Energy Committee Sierra Club Senior Resident Inspector (TMI-1) 433 Orlando Avenue U.S. Nuclear Regulatory Commission State College, PA 16803 P.O. Box 219 Middletown, PA 17057 Eric Epstein TMI Alert Director - Licensing and Regulatory Affairs 4100 Hillsdale Road AmerGen Energy Company, LLC Harrisburg, PA 17112 200 Exelon Way, KSA 3-E Kennett Square, PA 19348 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