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MONTHYEARML13136A2032013-05-20020 May 2013 Meeting Notice with Exelon Generation Company, LLC, to Discuss Once Through Steam Generator Tube-to-Tube Wear at Three Mile Island, Unit 1 Project stage: Meeting ML13179A0932013-07-17017 July 2013 6/17/2013 - Summary of Meeting with Exelon to Discuss Recent Once-Through Steam Generator Tube-to-Tube Wear at Three Mile Island, Unit 1 Project stage: Meeting 2013-05-20
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Category:Meeting Summary
MONTHYEARML23181A0342023-07-11011 July 2023 Summary of Classification Meeting with TMI-2 Solutions, LLC Regarding the Process for Consultation Under Section 106 of the National Historic Preservation Act of 1966 as Related to the Historic and Culture Resources Review License Amendment ML19326A3152019-12-0303 December 2019 Summary of November 18, 2019, Meeting with Exelon Generation Company, LLC Regarding a Planned Request for an Alternative to Supplemental Valve Position Indication Testing Requirements ML19191A1882019-07-0909 July 2019 Joint Annual Assessment Meeting (Webinar) for Pennsylvania Power Plants - Meeting Summary ML19162A0272019-06-21021 June 2019 Summary of June 4, 2019, Meeting with Exelon Generation Company, LLC Regarding a Planned Request to Extend the Test Interval for Safety Relief Valves ML19036A8832019-02-0707 February 2019 Summary of Meeting with Exelon Generation Company, LLC Regarding a Planned Request to Use ASME Code Case N-879 ML18354B1712019-01-0202 January 2019 Summary of December 19, 2018, Meeting with Exelon Generation Company, LLC Regarding the Use of Boiling Water Reactor Vessel and Internals Project Guidelines ML18325A1712018-11-28028 November 2018 Summary of Meeting with Exelon Generation Company, LLC Regarding Planned Fleet License Amendment Request to Revise Technical Specifications for High Radiation Areas ML18120A1772018-05-0101 May 2018 Summary of Meeting with Exelon Generation Company, LLC Regarding Draft Guidance for Emergency Response Organization Staffing ML18108A0652018-04-18018 April 2018 Annual Assessment Meeting Summary and Attendance List 2018 ML17132A2592017-05-19019 May 2017 TMI Annual Assessment Meeting (4-20-17) Summary ML16228A0622016-08-15015 August 2016 Summary of July 26, 2016, Public Meeting on Status of Associated Effects Submittals Related to the Reevaluated Flood Hazards at Exelon Generation Company, LLC Sites as Part of the Response to Near-Term Task Force Recommendation 2.1, Floodin ML16085A3292016-04-0606 April 2016 Summary of March 22, 2016, Meeting with Exelon Generation Company, LLC, on Proposed License Amendment Request to Adopt ANSI 3.1-2014 Operating Training Standards ML16091A0782016-03-31031 March 2016 Annual Assessment Meeting Summary on 03/23/2016 ML16040A2182016-02-11011 February 2016 January 21, 2016, Summary of Meeting with Exelon Generation Company, LLC Licensing Managers ML15350A1962015-12-30030 December 2015 Summary of the Conference Call Regarding Fall 2015 Steam Generator Tube Inservice Inspection ML15089A1642015-04-27027 April 2015 Summary of February 25, 2015, Partially Closed Meeting with Industry Stakeholders Regarding the Babcock and Wilcox Loss of Coolant Accident Evaluation Model Analysis ML15104A6382015-04-14014 April 2015 Summary of Annual Assessment Meeting - Three Mile Island Nuclear Station, Unit 1 ML14304A7832014-11-14014 November 2014 Public Meeting with the U.S. Nuclear Regulatory Commission and Exelon Generation Company, LLC Regarding Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Wate ML14133A0592014-07-0101 July 2014 Summary of Closed Meeting Between Representatives of the Army Corps of Engineers, Nuclear Regulatory Commission, Federal Energy Regulatory Commission, Exelon Generation Co, LLC, and PPL Susquehanna, LLC, to Discuss Dam Failure Analysis.. ML14119A0292014-04-29029 April 2014 Annual Assessment Meeting Summary for April 17, 2014 ML14015A3562014-01-24024 January 2014 Summary of Conference Calls Regarding the Fall 2013 Steam Generator Tube Inservice Inspection ML13262A1632013-09-23023 September 2013 Meeting Report - Three Mile Island, Unit 2, Post-Shutdown Decommissioning Activities Report Public Meeting ML13179A0932013-07-17017 July 2013 6/17/2013 - Summary of Meeting with Exelon to Discuss Recent Once-Through Steam Generator Tube-to-Tube Wear at Three Mile Island, Unit 1 ML13141A6372013-05-21021 May 2013 5/7/2013 - Summary of Annual Assessment Meeting - Three Mile Island ML12110A3112012-05-0303 May 2012 4/10/2012 Summary of Public Meeting with Exelon Generation Company, LLC Regarding Its Future Submittal of Technical Specification Changes of Licensed Operator Eligibility Requirements ML12117A0022012-04-25025 April 2012 ROP-12 Annual Assessment Meeting Summary ML1202704162012-02-13013 February 2012 1/26/2012 - Summary of Meeting with Entergy and Exelon to Discuss Recent Once-Through Steam Generator Inservice Inspection Results ML1135501672011-12-28028 December 2011 Summary of Conference Calls with Exelon Generation Company, LLC to Discuss 2011 Steam Generator Tube Inspections ML1116500712011-06-14014 June 2011 Summary of Three Mile Island Annual Assessment Meeting, June 7, 2011 ML1108109722011-03-25025 March 2011 Summary of March 14, 2011, Meeting with Exelon to Discuss Proposed Main Steam Safety Valve License Amendment Request ML1036305532011-01-0606 January 2011 Summary of Meeting (Teleconference) with Exelon to Discuss RAI Regarding the Implementation of an Emergency Action Level Scheme Based on NEI 99-01, Rev. 5 ML1031902892010-11-22022 November 2010 Summary of October 19, 2010 NRC Petition Board Meeting for 2.206 Petition Regarding TMI-2 Decommissioning Funding Financial Assurance ML1020700252010-07-27027 July 2010 Summary of Category 1 Meeting with Exelon to Discuss Re-Submittal of Its Cyber Security Plan ML1015301202010-05-27027 May 2010 Memo Annual Assessment Meeting Summary for Three Mile Island ML0930804802009-11-19019 November 2009 Meeting Summary of 10/22/2009 Meeting Regarding Its Power Uprate Project Plan ML0930104552009-11-0303 November 2009 Once-Through Steam Generator Tube Loads Under Conditions Resulting from Postulated Breaks in Reactor Coolant System Upper Hot-Leg Large-Bore Piping ML0929501582009-11-0202 November 2009 Summary of Category 1 Public Meeting with Exelon to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML0929406112009-11-0202 November 2009 Summary of Category 1 Public Meeting with Exelon to Discuss Proposed Control Rod Drive Control System License Amendment Request ML0926705032009-09-30030 September 2009 Summary of Meeting with Exelon to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML0922505512009-08-21021 August 2009 Summary of August 11, 2009, Meeting with Exelon to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information ML0919803632009-08-20020 August 2009 Summary of Licensing Counterparts Meeting with Exelon Generation Company, to Discuss Licensing Practices and Processes ML0912801592009-05-0707 May 2009 TMI Annual Assessment Meeting 4/2/09 - Summary ML0906204192009-03-0909 March 2009 02/24/2009 Summary of Public Meetings on the Draft Supplemental Environmental Impact Statement Regarding the Three Mile Island Nuclear Station, Unit 1, License Renewal Review (TAC No. MD7702) Ltr ML0833100732008-11-26026 November 2008 Summary of Meeting with Exelon to Review the Results of Security Organization Safety Conscious Work Environment (SCWE) Surveys at Exelon Nuclear Operating Reactors ML0830900532008-11-17017 November 2008 License Renewal Application, Summary of Conference Call with Amergen Energy Company Regarding Responses to Request for Additional Information for Sections 2.3.3 and 2.3.4 ML0826821322008-10-10010 October 2008 Summary of Meeting with Amergen to Discuss Planned License Amendment Request Relating to Rod Control System Replacement ML0821207272008-08-0505 August 2008 07/17/2008 Summary of Telephone Conference Call Between the NRC and Amergen Energy Company, Llc., Concerning Follow-up Questions Pertaining to Three Mile Island, Unit 1 License Renewal Environmental Review and Site Audit ML0815606662008-06-12012 June 2008 Summary of Conference Call with Amergen Energy Company, LLC, to Discuss the Severe Accident Mitigation Alternatives Requests for Additional Information for Three Mile Island Nuclear Station, Unit 1 ML0812007572008-06-0202 June 2008 Summary of Category 1 Meeting with Exelon to Discuss Current and Planned Licensing Activities and Processes ML0813606482008-05-22022 May 2008 05/01/08 Summary of Public Environmental Scoping Meetings Related to the Review of the Three Mile Island, Unit 1, License Renewal Application 2023-07-11
[Table view] Category:Letter
MONTHYEARML24038A0222024-02-0505 February 2024 Achp Letter on Section 106 Programmatic Agreement Participation IR 05000289/20230062024-01-29029 January 2024 Constellation Energy Generation, LLC, Three Mile Island Nuclear Station, Unit 1 - NRC Inspection Report No. 05000289/2023006 ML23342A1242024-01-0909 January 2024 Independent Spent Fuel Storage Installation Security Inspection Plan ML23325A1092024-01-0505 January 2024 Review of the Management Plan for Three Mile Island Station, Unit No. 2, Debris Material ML23354A2062023-12-20020 December 2023 (TMI-2), Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23354A2112023-12-20020 December 2023 Response to Request for Additional Information for the TMI-2 Post-Shutdown Decommissioning Activities Report, Rev. 5 IR 05000320/20230032023-11-28028 November 2023 TMI-2 Solutions, LLC, Three Mile Island Nuclear Station, Unit 2, NRC Inspection Report No. 05000320/2023003 ML23243A9082023-08-29029 August 2023 Shpo Letter to TMI-2 Regarding Section 106 Activities IR 05000320/20230022023-08-17017 August 2023 TMI-2 Solutions, LLC, Three Mile Island Nuclear Station, Unit 2 - NRC Inspection Report 05000320/2023002 ML23216A1742023-08-14014 August 2023 Consultation Letter to David Morrison for TMI-2 ML23216A1772023-08-14014 August 2023 Consultation Letter to Rebecca Countess for TMI-2 ML23216A1752023-08-14014 August 2023 Consultation Letter to Joanna Cain for TMI-2 ML23216A1732023-08-14014 August 2023 Consultation Letter to Christine Turner for TMI-2 IR 05000289/20230052023-08-14014 August 2023 Constellation Energy Generation, LLC, Three Mile Island Nuclear Station, Unit 1 - NRC Inspection Report 05000289/2023005 ML23216A1782023-08-14014 August 2023 Consultation Letter to Steve Letavic for TMI-2 ML23221A1402023-08-0808 August 2023 (TMI-2), Response to Requests for Additional Information for the TMI-2 Post-Shutdown Decommissioning Activities Report, Rev. 5 ML23200A1882023-07-31031 July 2023 TMI-2 Correction Letter Amendment 67 ML23209A7632023-07-28028 July 2023 Letter from PA Shpo to TMI-2 Solutions on Cultural and Historic Impacts of Decommissioning ML23192A8272023-07-10010 July 2023 TMI-2 Solutions, LLC - Response to Shpo Request for Additional Information for Er Project 2021PR03278.006, TMI-2 Decommissioning Project ML23167A4642023-07-0505 July 2023 Letter - TMI-2- Exemption 10 CFR Part 20 Append G Issuance ML23167A0312023-06-28028 June 2023 Acceptance Review and Schedule for the Request for Exemption from a Requirement from 10 CFR 20, Appendix G, Section Iii.E, EPID L-2023-LLE-0016 ML23171B0222023-06-19019 June 2023 (TMI-2) - Notification Pursuant to 10 CFR 72.140(d) Regarding Application of Previously Approved TMI-2 Quality Assurance Program to Independent Spent Fuel Storage Installation Activities ML23137A2822023-05-17017 May 2023 (TMI-2), Request for Exemption from 10 CFR 20, Appendix G, Section Iii.E ML23138A0662023-05-17017 May 2023 TMI-2 NHPA Section 106 Shpo Letter to NRC 5-17-23 ML23026A3132023-05-0202 May 2023 Issuance of Exemption from 10 CFR 70.24 (EPID-L-2023-LLE-0003) ML23122A1842023-05-0101 May 2023 Shpo_Er_Summary_Letter ML23121A2492023-05-0101 May 2023 License Amendment Request, Historic and Cultural Resources Review, Response to Request for Additional Information ML23117A0012023-04-26026 April 2023 Commitment Revision Summary Report ML23027A0832023-04-24024 April 2023 Environmental Assessment/Finding of No Significant Impact - Request for Exemption from 10 CFR 70.24 ML23108A0802023-04-18018 April 2023 Annual Radiological Effluent Release Report ML23108A0822023-04-18018 April 2023 Annual Radiological Environmental Operating Report IR 05000320/20230012023-04-12012 April 2023 TMI-2 Solutions, LLC, Three Mile Island Nuclear Station, Unit 2 - NRC Inspection Report No. 05000320/2023001 ML23102A0382023-04-10010 April 2023 Occupational Radiation Exposure Annual Report ML23108A2002023-04-10010 April 2023 CFR 20.2206(b) Personnel Radiation Exposure Report for 2022 ML23094A2582023-04-0606 April 2023 Letter to Sidney Hill, Chief, Onondaga Nation, Re., Initiation of Consultation Under Section 106 of the NHPA for the Proposed License Amendment Request for TMI 2 ML23093A0572023-04-0606 April 2023 Letter to Joanna Cain, President, Re., Ongoing Activities Related to the Proposed License Amendment Request for Three Mile Island Nuclear Station, Unit 2 ML23094A2362023-04-0606 April 2023 Letter to Carissa Speck, Re., Initiation of Consultation Under Section 106 of the NHPA for the Proposed License Amendment Request for Three Mile Island Nuclear Station, Unit 2 ML23094A2542023-04-0606 April 2023 Ltr J Bendremer Thpo Stockbridge-Munsee Community Band of Mohican Indians Re Initiation of Consultation Under Section 106 of the NHPA for Proposed License Amendment Request for TMI 2 ML23086C0652023-04-0606 April 2023 Ltr Larry Heady, Thpo, De. Tribe of Indian; Re., Initiation of Consultation Under Section 106 of the NHPA for the Proposed License Amendment Request for TMI Nuclear Station, Unit 2 ML23093A0562023-04-0606 April 2023 Letter to Steve Minnick, Site Decommissioning Director, Re., Ongoing Activities Related to the Proposed License Amendment Request for Three Mile Island Nuclear Station, Unit 2 ML23094A2602023-04-0606 April 2023 Letter to William Tarrant, Seneca-Cayuga Nation, Re., Initiation of Consultation Under Section 106 of the NHPA for the Proposed License Amendment Request for TMI 2 ML23094A2392023-04-0606 April 2023 Letter to Courtney Gerzetich, Thpo, Onedia Nation of Wisconsin, Re., Initiation of Consultation Under Section 106 of the NHPA for the Proposed License Amendment Request for TMI 2 ML23093A0592023-04-0606 April 2023 Letter to Rebecca Countess, Chair, Re., Ongoing Activities Related to the Proposed License Amendment Request for Three Mile Island Nuclear Station, Unit 2 2024-02-05
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UNITED STATES ",v'v "'1' ","!' ,",,,,,°11NUCLEAR REGULATORY COMMISSION t:: WASHINGTON, D.C. 20555*0001
<< 0 :;; 3: f fJ"J July17,2013
Exelon Generation Company, LLC (Exelon)
Three Mile Island, Unit 1
SUMMARY
OF JUNE 17, 2013, MEETING WITH EXELON TO DISCUSS RECENT ONCE-THROUGH STEAM GENERATOR TUBE-TO-TUBE WEAR AT THREE MILE ISLAND, UNIT 1 (TAC NO. MF1787) On June 17, 2013, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives from Exelon Generation Company, LLC (Exelon, the licensee).
Representatives from AREVA (the vendor) also participated in the meeting. The purpose of the meeting was to discuss recent steam generator inservice inspection results at Three Mile Island, Unit 1 (TMI-1). Specifically, the meeting was held to discuss the results of the root cause investigation regarding tube-to-tube wear indications in the replacement once-through steam generators at TMI-1. This meeting was a follow-up to a meeting held on January 26,2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 120270416), which discussed inspection results both at TMI-1 and Arkansas Nuclear One (ANO), Unit 1. The licensee presented background information regarding the inspection results from the fall of 2011, which was when the issue was discovered at TMI-1. The NRC staff asked if there were three wear indications at any elevation on any of the tubes. After the meeting, the licensee confirmed that there are two tubes in the 'A' steam generator that have three wear indications at one elevation.
There are none in 'B' steam generator.
The licensee provided trend data, updated since the previous meeting held on January 26, 2012, with data from the most recent refueling outage at ANO, Unit 1. The data generally shows that the growth rate tends to decrease as operating time accrues. The NRC staff questioned two instances where that did not seem to be the case. The licensee indicated that some differences would be expected in the observed data. The NRC staff also noted that it is apparent that the wear can initiate in cycles beyond the first operating cycle. The licensee and vendor postulated that this could happen due to variances in local conditions, including the actual heatup and cooldown process, at those specific tube locations, and/or inspection variability.
The licensee explained that when hot, the steam generator tubes are in compreSSion and when cold, the tubes are in tension. The licensee stated that the root cause of the tube-to-tube wear was a combination of four contributing causes: 1. Margin to buckling was non-conservative in the design, 2. The outside shell of the steam generator is cooler than the design value, 3. The tube preload is less tensile than the value used in the design analysis, and 4. Lateral loads/accelerations are sufficient to cause the observed wear.
-The first three contributing causes all tend to result in tube bowing, sufficient to cause tube-to-tube contact. Excitation forces created by either random turbulence or "flutter" (contributing cause number 4) are then sufficient to result in wear. The licensee does not plan to implement any operational restrictions as a result of this root cause analysis, however, further evaluation is planned in the upcoming refueling outage, including a full tube inspection and possibly performing field testing to measure the in-generator tube axial pre-load.
The licensee provided handouts that guided the meeting discussion.
A non-proprietary version of the handouts can be found at ADAMS Accession No. ML 13178A360.
A list of attendees is provided in the Enclosure.
Members of the public that participated in the meeting provided questions and comments that were addressed during the meeting. Meeting feedback forms were made available to the attendees, however, none were filled out and submitted to the NRC meeting contact. Please direct any inquiries to me at 301-415-2833 or peter.bamford@nrc.gov.
Peter Bamford Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No.
List of cc w/encl: Distribution via LIST OF JUNE 17,2013, MEETING WITH EXELON GENERATION COMPANY, ONCE-THROUGH STEAM GENERATOR TUBE-TO-TUBE ROOT CAUSE INVESTIGATION RESULTS AT THREE MILE ISLAND, UNIT Exelon Jay Smith Mark Torborg James Barstow Stephanie Hanson John Piazza Wendy Croft Michael Fitzwater Randy Stewart AREVA Jeff Fleck TimWiger Dan Bauer Hasan Charkas John Remark Michael Street Craig Kelley PUBLIC (via teleconference)
Dennis Dyckman, PA state Scott Portzline, TMI Alert Dan Meatheany, Entergy Bob Clark, Entergy Peter Bamford, Office of Nuclear Reactor Regulation (NRR) Kenneth Karwoski, NRR Gloria Kulesa, NRR Veronica Rodriguez, NRR Gregory Makar, Office of New Reactors David Werkheiser, Region I (RI) James Trapp, RI Timothy O'Hara, RI Aloysius Obodoako, NRR Neil Sheehan, Office of Public Affairs Enclosure
-The first three contributing causes all tend to result in tube bowing, sufficient to cause tube-to-tube contact. Excitation forces created by either random turbulence or "flutter" (contributing cause number 4) are then sufficient to result in wear. The licensee does not plan to implement any operational restrictions as a result of this root cause analysis, however further evaluation is planned in the upcoming refueling outage, including a full tube inspection and possibly performing field testing to measure the in-generator tube axial pre-load.
The licensee provided handouts that guided the meeting discussion.
A non-proprietary version of the handouts can be found at ADAMS Accession No. ML 13178A360.
A list of attendees is provided in the Enclosure.
Members of the public that participated in the meeting provided questions and comments that were addressed during the meeting. Meeting feedback forms were made available to the attendees, however, none were filled out and submitted to the NRC meeting contact. Please direct any inquiries to me at 301-415-2833 or peter.bamford@nrc.gov.
Ira! Peter Bamford Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-289
Enclosure:
List of Attendees cc w/encl: Distribution via ListServ DISTRIBUTION:
PUBLIC RidsNrrPMThreeMilelsland Resource TWertz. NRR Branch Reading RidsNrrLAABaxter Resource KKarwoski.
NRR RidsAcrsAcnw_MailCTR Resource RidsRgnlMailCenter Resource AObodoako.
NRR RidsNrrDorlLpll-2 Resource VCampbeli.
OEDO Region I AJohnson.
NRR RidsNrrDeEsgb Resource ADAMS Accession Nos.: Package ML 13178A358; Meeting Notice ML 13136A203; Meeting Handouts ML 13178A360 and M L13179A086:
Meeting S ummary ML 1 31 7 9A093 \ *Via email OFFICE DORULPLI-21PM DE/SLS DORULPLI-21LA DORULPLI-2/BC 1 DORULPLI-21PM NAME PBamford KKarwoski ABaxter* VRodriguez
- PBamford DATE 6/28/13 7/8113 07116/13 7117/13 17/17/13 i OFFICIAL RECORD COpy