ML051180042

RAI, Response to Generic Letter 2004-01, Requirements for Steam Generator Tube Inspection

ML051180042
Person / Time
Site:	Three Mile Island
Issue date:	05/09/2005
From:	Colburn T NRC/NRR/DLPM/LPD1
To:	Crane C AmerGen Energy Co
Colburn T, NRR/DLPM, 415-1402
References
TAC MC4859
Download: ML051180042 (6)

Text

May 9, 2005 Mr. Christopher M. Crane President and Chief Executive Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: THREE MILE ISLAND NUCLEAR STATION, UNIT 1 (TMI-1) RESPONSE TO GENERIC LETTER (GL) 2004-01, REQUIREMENTS FOR STEAM GENERATOR TUBE INSPECTION, DATED AUGUST 30, 2004 (TAC NO. MC4859)

Dear Mr. Crane:

By letter dated October 29, 2004 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML043060328), AmerGen Energy Company, LLC (the licensee),

submitted its response to GL 2004-01 for TMI-1.

The Nuclear Regulatory Commission staff has determined that it will need the additional information identified in the enclosure to this letter in order to complete its review of the subject GL. As discussed with and agreed to by your staff, please provide the requested information within 30 days of receipt of this letter. If you have any questions, please contact me at (301) 415-1402.

Sincerely,

/RA/

Timothy G. Colburn, Senior Project Manager, Section 1 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-289

Enclosure:

RAI cc w/encl: See next page

Mr. Christopher M. Crane President and Chief Executive Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: THREE MILE ISLAND NUCLEAR STATION, UNIT 1 (TMI-1) RESPONSE TO GENERIC LETTER (GL) 2004-01, REQUIREMENTS FOR STEAM GENERATOR TUBE INSPECTION, DATED AUGUST 30, 2004 (TAC NO. MC4859)

Dear Mr. Crane:

By letter dated October 29, 2004 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML043060328), AmerGen Energy Company, LLC (the licensee),

submitted its response to GL 2004-01 for TMI-1.

The Nuclear Regulatory Commission staff has determined that it will need the additional information identified in the enclosure to this letter in order to complete its review of the subject GL. As discussed with and agreed to by your staff, please provide the requested information within 30 days of receipt of this letter. If you have any questions, please contact me at (301) 415-1402.

Sincerely,

/RA/

Timothy G. Colburn, Senior Project Manager, Section 1 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-289

Enclosure:

RAI cc w/encl: See next page DISTRIBUTION PUBLIC PDI-1 R/F RLaufer TColburn DLPM/DPR JTerrell MOBrien PKlein LLund OGC ACRS MYoder ABurritt, RGN-I ACCESSION NO.: ML051180042 *Input received. No substantive changes made.

OFFICE PDI-1\PM PDI-2\LA EMCB\SC PDI-1\SC NAME TColburn MOBrien LLund* RLaufer DATE 5/9/05 5/9/05 03/24/05 5/9/05 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION (RAI)

RELATED TO AMERGEN ENERGY COMPANY, LLC THREE MILE ISLAND NUCLEAR STATION, UNIT 1 (TMI-1)

GENERIC LETTER (GL) 2004-01 RESPONSE DOCKET NO. 50-289 By letter dated October 29, 2004, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML043060328) AmerGen Energy Company, LLC, the licensee for TMI-1, submitted a response to GL 2004-01, Requirements For Steam Generator Tube Inspection, dated August 30, 2004. The Nuclear Regulatory Commission (NRC) staff has reviewed the licensees letter and has determined that additional information is needed in order for the NRC staff to complete its review. Responses to the following questions are requested:

1. The October 29, 2004, response to GL 2004-01 indicated that the TMI-1 steam generator (SG) tube inspection approach/methods are consistent with the NRC staffs position provided in the GL. In Table 1, Note 6, you state that examination results from other once-through SG plants in the lower tubesheet sludge pile region have indicated that bobbin coil detection capability may be reduced in this region. You further state that there is no evidence to date, that TMI-1 is experiencing a reduction in the bobbin coil probability of detection (POD) in this region. Please provide the basis for this statement considering that licensees for other plants with similarly designed SGs have stated that tubes in the kidney region require the use of a rotating pancake coil probe for better detection of intergranular attack (IGA) due to sludge build up in the upper portion of the lower tubesheet crevice. In addition, for each indication within the sludge pile and in other areas of the lower tubesheet (excluding tube end cracking), provide a summary that includes the indications location, the nature of the indication (IGA, stress-corrosion cracking (SCC), etc.), the indications severity (length and depth), and whether the indication was detected by bobbin coil inspection, rotating pancake coil probe inspection, or both. Discuss whether rotating pancake coil probe inspections detected indications that were not detected by the bobbin coil probe, and if so, the implications of this finding. Discuss if the bobbin coil technique used in the lower tubesheet region meets the industry standards (e.g., Appendix H of the Electric Power Research Institute Pressurized-Water Reactor Steam Generator Examination Guidelines: Revision 6, ADAMS Accession No. ML050980251). If this technique does not meet the industry standards, discuss your future plans for qualifying the inspection technique. If this technique does not meet industry standards and you have no plans to qualify the technique to an industry standard, provide the acceptance standard, specification or criteria you are using and the technical basis for this standard, specification, or criteria to ensure the adequacy of this technique.

Enclosure

2. If as a result of your response to the questions above, you conclude that full compliance with the TMI-1 Technical Specifications in conjunction with Criteria IX, XI, and XVI of Title 10 of the Code of Federal Regulations, Part 50, Appendix B, requires corrective actions, please discuss your proposed corrective actions as requested by GL 2004-01, Requested Information #2. In addition, if the inspections are not being performed consistent with the NRC position on the requirements, please submit a safety assessment as requested in GL 2004-01, Requested Information #3.

Three Mile Island Nuclear Station, Unit 1 cc:

Site Vice President - Three Mile Island Nuclear Director - Licensing and Regulatory Affairs Station, Unit 1 AmerGen Energy Company, LLC AmerGen Energy Company, LLC 200 Exelon Way, KSA 3-E P. O. Box 480 Kennett Square, PA 19348 Middletown, PA 17057 Rich Janati, Chief Senior Vice President - Nuclear Services Division of Nuclear Safety AmerGen Energy Company, LLC Bureau of Radiation Protection 4300 Winfield Road Department of Environmental Protection Warrenville, IL 60555 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 Peter Eselgroth, 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 Vice President, General Counsel and Secretary Middletown, PA 17057 AmerGen Energy Company, LLC 2301 Market Street, S23-1 Senior Resident Inspector (TMI-1) Philadelphia, PA 19101 U.S. Nuclear Regulatory Commission P.O. Box 219 Middletown, PA 17057

Three Mile Island Nuclear Station, Unit 1 cc:

Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 Eric Epstein TMI Alert 4100 Hillsdale Road Harrisburg, PA 17112 Correspondence Control Desk AmerGen Energy Company, LLC P.O. Box 160 Kennett Square, PA 19348 Manager Licensing - Three Mile Island Nuclear Station, Unit 1 Exelon Generation Company, LLC 200 Exelon Way, KSA 3-E Kennett Square, PA 19348 Associate General Counsel AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555