Letter Sequence Response to RAI |
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Category:Inspection Report Correspondence
MONTHYEARTMI-14-074, Response to Request for Additional Information Related to the Fall 2013 Steam Generator Inspections2014-11-17017 November 2014
Response to Request for Additional Information Related to the Fall 2013 Steam Generator Inspections
IR 05000289/20090082009-09-22022 September 2009
IR 05000289-09-008 on 08/19/2009 for Three Mile Island, Unit 1
IR 05000289/20094022009-06-19019 June 2009
IR 05000289-09-402, on 04/20/2009 - 05/15/2009, Three Mile Island Nuclear Station, Unit 1, Identification and Resolution of Problems
ML1007604662009-03-23023 March 2009
Decision Documentation for Reactive Inspection, Regarding Plant: TMI
ML0805701132008-02-26026 February 2008
PI&R TMI: March and April 2008
IR 05000289/20060132003-11-0202 November 2003
IR 05000289-06-013; Three Mile Island Station, Unit 1; Ti 2515/168
IR 05000289/20020032002-04-16016 April 2002
IR 05000289/2002-003, on 03/04-22/2002; Amergen Energy Company, LLC; Three Mile Island (TMI) Unit 1; Biennial Baseline Inspection of Identification and Resolution of Problems. One Green Finding Was Identified Regarding Problem Evaluation
IR 05000289/20010132002-03-0808 March 2002
IR 05000289/2001-013, on 12/30/2001 - 2/9/2002, Amergen Energy Company, LLC, Three Mile Island Unit 1, Integrated Resident Inspector Report, Adverse Weather Protection, Maintenance Risk Assessments, post-maintenance Testing
IR 05000289/20010142002-03-0101 March 2002
IR 05000289/2001-014, on 12/10-28/2001, Amergen Energy Company, LLC, Three Mile Island Unit 1. Supplemental Inspection of White Inspection Finding; Corrective Actions
2014-11-17
[Table view]
Category:Letter type:TMI
MONTHYEARTMI-24-007, Re 2023 Commitment Revision Summary Report2024-04-29029 April 2024
Re 2023 Commitment Revision Summary Report
TMI-23-018, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-11-22022 November 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
TMI-23-013, Radiological Emergency Plan Document Revision2023-05-30030 May 2023
Radiological Emergency Plan Document Revision
TMI-23-009, Submittal of Changes to Technical Specifications Bases2023-04-13013 April 2023
Submittal of Changes to Technical Specifications Bases
TMI-23-004, Updated Site-Specific Decommissioning Cost Estimate for Three Mile Island Nuclear Station, Unit 12023-03-21021 March 2023
Updated Site-Specific Decommissioning Cost Estimate for Three Mile Island Nuclear Station, Unit 1
TMI-23-005, Updated Spent Fuel Management Plan2023-03-21021 March 2023
Updated Spent Fuel Management Plan
TMI-23-002, Radiological Emergency Plan Document Revision2023-02-23023 February 2023
Radiological Emergency Plan Document Revision
TMI-22-028, Radiological Emergency Plan Document Revisions2022-09-27027 September 2022
Radiological Emergency Plan Document Revisions
TMI-22-016, 2021 Annual Radiological Effluent Release Report2022-04-25025 April 2022
2021 Annual Radiological Effluent Release Report
TMI-22-017, 2021 Annual Radiological Environmental Operating Report2022-04-25025 April 2022
2021 Annual Radiological Environmental Operating Report
TMI-22-018, 10 CFR 20.2206(b) Personnel Radiation Exposure Report for 20212022-04-19019 April 2022
10 CFR 20.2206(b) Personnel Radiation Exposure Report for 2021
TMI-22-015, Submittal of Changes to Technical Specifications Bases2022-04-13013 April 2022
Submittal of Changes to Technical Specifications Bases
TMI-22-009, Registration of Use of Casks to Store Spent Fuel2022-03-0909 March 2022
Registration of Use of Casks to Store Spent Fuel
TMI-22-008, 2021 Aircraft Movement Data Annual Report for TMI-12022-02-28028 February 2022
2021 Aircraft Movement Data Annual Report for TMI-1
TMI-22-004, Registration of Use of Casks to Store Spent Fuel2022-02-0606 February 2022
Registration of Use of Casks to Store Spent Fuel
TMI-21-027, Supplement to License Amendment Request - Proposed Changes to the Three Mile Island Emergency Plan for Independent Spent Fuel Storage Installation Only Emergency Plan and Emergency Action Level Scheme2021-08-30030 August 2021
Supplement to License Amendment Request - Proposed Changes to the Three Mile Island Emergency Plan for Independent Spent Fuel Storage Installation Only Emergency Plan and Emergency Action Level Scheme
TMI-21-024, 90-Day Notification Prior to First Storage of Spent Fuel2021-06-15015 June 2021
90-Day Notification Prior to First Storage of Spent Fuel
TMI-21-025, Notification Pursuant to 10 CFR 72.140(d) of Intent to Apply Previously Approved 10 CFR 50, Appendix B, Quality Assurance Program to Independent Spent Fuel Storage Installation Activities2021-06-15015 June 2021
Notification Pursuant to 10 CFR 72.140(d) of Intent to Apply Previously Approved 10 CFR 50, Appendix B, Quality Assurance Program to Independent Spent Fuel Storage Installation Activities
TMI-21-026, Demonstration of Compliance with NRC Order EA-20-103, Issuance of Order for Implementation of Additional Security Measures & Fingerprinting for Unescorted Access at Independent Spent Fuel Storage Installation2021-06-15015 June 2021
Demonstration of Compliance with NRC Order EA-20-103, Issuance of Order for Implementation of Additional Security Measures & Fingerprinting for Unescorted Access at Independent Spent Fuel Storage Installation
TMI-21-018, License Amendment Request - Revised Three Mile Island Nuclear Station License in Support of Independent Spent Fuel Storage Installation (ISFSI) Only Security Plan2021-04-29029 April 2021
License Amendment Request - Revised Three Mile Island Nuclear Station License in Support of Independent Spent Fuel Storage Installation (ISFSI) Only Security Plan
TMI-21-019, Submittal of 2020 Annual Radiological Environmental Operating Report2021-04-27027 April 2021
Submittal of 2020 Annual Radiological Environmental Operating Report
TMI-21-017, Submittal of 2020 Annual Radiological Effluent Release Report2021-04-27027 April 2021
Submittal of 2020 Annual Radiological Effluent Release Report
TMI-21-021, (TMI-1) and Unit 2 (TMI-2) - 10 CFR 20.2206(b) Personnel Radiation Exposure Report for 20202021-04-27027 April 2021
(TMI-1) and Unit 2 (TMI-2) - 10 CFR 20.2206(b) Personnel Radiation Exposure Report for 2020
TMI-21-009, License Amendment Request - Proposed Changes to the Three Mile Island Emergency Plan for Independent Spent Fuel Storage Installation Only Emergency Plan and Emergency Action Level Scheme2021-03-0404 March 2021
License Amendment Request - Proposed Changes to the Three Mile Island Emergency Plan for Independent Spent Fuel Storage Installation Only Emergency Plan and Emergency Action Level Scheme
TMI-20-027, Request for Rescission of Security and Safeguards Order EA-02-026 ICM B.1.a from Three Mile Island Nuclear Station Renewed Facility License2020-10-0909 October 2020
Request for Rescission of Security and Safeguards Order EA-02-026 ICM B.1.a from Three Mile Island Nuclear Station Renewed Facility License
TMI-20-026, Response to NRC Order EA-20-103, Issuance of Order for Implementation of Additional Security Measures & Fingerprinting for Unescorted Access at Three Mile Island Generating Station Independent Spent Fuel Storage Installation2020-09-15015 September 2020
Response to NRC Order EA-20-103, Issuance of Order for Implementation of Additional Security Measures & Fingerprinting for Unescorted Access at Three Mile Island Generating Station Independent Spent Fuel Storage Installation
TMI-20-025, Letter Re Inadvertent Submittal of Exelon Generation Company, LLC - Rev. 95 to NO-AA-10, Quality Assurance Topical Report2020-07-16016 July 2020
Letter Re Inadvertent Submittal of Exelon Generation Company, LLC - Rev. 95 to NO-AA-10, Quality Assurance Topical Report
TMI-20-021, Response to Request for Additional Information Regarding License Amendment Request - Deletion of PDTS 3/4.1.4, Handling of Irradiated Fuel with the Fuel Handling Building Crane, and Two Minor Administrative2020-07-0808 July 2020
Response to Request for Additional Information Regarding License Amendment Request - Deletion of PDTS 3/4.1.4, Handling of Irradiated Fuel with the Fuel Handling Building Crane, and Two Minor Administrative
TMI-20-015, 2018-2019 Biennial 10 CFR 50.59 Summary Report and 2019 Commitment Revision Summary Report2020-04-30030 April 2020
2018-2019 Biennial 10 CFR 50.59 Summary Report and 2019 Commitment Revision Summary Report
TMI-20-016, 2019 Annual Radiological Environmental Operating Report2020-04-30030 April 2020
2019 Annual Radiological Environmental Operating Report
TMI-20-017, 2019 Annual Radiological Effluent Release Report2020-04-30030 April 2020
2019 Annual Radiological Effluent Release Report
TMI-20-012, Island Nuclear Station, Unit 1 - Submittal of Changes to Technical Specifications Bases2020-04-13013 April 2020
Island Nuclear Station, Unit 1 - Submittal of Changes to Technical Specifications Bases
TMI-20-002, Annual Notification of Property Insurance Coverage2020-03-25025 March 2020
Annual Notification of Property Insurance Coverage
TMI-20-006, Notification of Revision of Commitment for Amended Post-Shutdown Decommissioning Activities Report (PSDAR) for Three Mile Island, Unit 2 in Accordance with 10 CFR 50.82(a)(7)2020-03-0202 March 2020
Notification of Revision of Commitment for Amended Post-Shutdown Decommissioning Activities Report (PSDAR) for Three Mile Island, Unit 2 in Accordance with 10 CFR 50.82(a)(7)
TMI-19-112, Application for Order Approving License Transfer and Conforming License Amendments2019-11-12012 November 2019
Application for Order Approving License Transfer and Conforming License Amendments
TMI-19-097, License Amendment Request - License Condition Revision for Removal of Cyber Security Plan Requirements2019-10-31031 October 2019
License Amendment Request - License Condition Revision for Removal of Cyber Security Plan Requirements
TMI-18-100, Supplement 2 to License Amendment Request - Proposed Changes to Technical Specifications Sections 1.0, Definitions, and 6.0, Administrative Controls for Permanently Defueled Condition2018-10-29029 October 2018
Supplement 2 to License Amendment Request - Proposed Changes to Technical Specifications Sections 1.0, Definitions, and 6.0, Administrative Controls for Permanently Defueled Condition
TMI-18-088, Response to Request for Additional Information: TMI Fall 2017 Steam Generator Tube Inspection Report2018-08-21021 August 2018
Response to Request for Additional Information: TMI Fall 2017 Steam Generator Tube Inspection Report
TMI-18-024, Biennial 10 CFR 50.59 and Pdms SAR Report2018-04-24024 April 2018
Biennial 10 CFR 50.59 and Pdms SAR Report
TMI-18-044, Transmittal of Radiological Emergency Plans; EP-AA-1009, Revision 28, EP-TM-1000, Revision 0 and EP-AA-1000, Revision 292018-03-29029 March 2018
Transmittal of Radiological Emergency Plans; EP-AA-1009, Revision 28, EP-TM-1000, Revision 0 and EP-AA-1000, Revision 29
TMI-18-004, Decommissioning Funding Status Report for the Three Mile Island Nuclear Station, Unit 22018-03-16016 March 2018
Decommissioning Funding Status Report for the Three Mile Island Nuclear Station, Unit 2
TMI-18-017, Annual Report2018-02-12012 February 2018
Annual Report
TMI-17-093, Transmittal of Radiological Emergency Plan Annex Procedure EP-AA-1009, Revision 252017-08-18018 August 2017
Transmittal of Radiological Emergency Plan Annex Procedure EP-AA-1009, Revision 25
TMI-17-060, Request for Approval of Certified Fuel Handler Training Program2017-07-10010 July 2017
Request for Approval of Certified Fuel Handler Training Program
TMI-17-051, Supplement to Plant-Specific Path and Schedule for Resolution of Generic Letter 2004-02, Dated May 16, 20132017-05-16016 May 2017
Supplement to Plant-Specific Path and Schedule for Resolution of Generic Letter 2004-02, Dated May 16, 2013
TMI-17-035, Submittal of Changes to Technical Specifications Bases2017-04-13013 April 2017
Submittal of Changes to Technical Specifications Bases
TMI-17-034, Submittal of 2016 Commitment Revision Report as Required by SECY-00-0045 (NEI 99-04)2017-03-31031 March 2017
Submittal of 2016 Commitment Revision Report as Required by SECY-00-0045 (NEI 99-04)
TMI-17-006, Decommissioning Funding Status Report2017-03-24024 March 2017
Decommissioning Funding Status Report
TMI-16-097, Supplemental Information Related to Security Plan, Training and Qualification Plan, and Safeguards Contingency Plan, Revision 172016-10-20020 October 2016
Supplemental Information Related to Security Plan, Training and Qualification Plan, and Safeguards Contingency Plan, Revision 17
TMI-16-082, Notice of Transfer of Transmission Asset2016-09-15015 September 2016
Notice of Transfer of Transmission Asset
2024-04-29
[Table view] |
Text
Three Mile Island Unit 1 ExetonGeneration, Route 441 South, P.O. Box 480 Middletown, PA 17057 Telephone 717-948-8000 10CFR50.55a November 17, 2014 TMI-14-074 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Three Mile Island Nuclear Station, Unit 1 (TMI Unit 1)
Renewed Facility Operating License No. DPR-50 NRC Docket No. 50-289
Subject:
Response to Request for Additional Information Related to the Fall 2013 Steam Generator Inspections
References:
- 1) Letter from R. W. Libra (Exelon Generation Company, LLC) to the U.S. Nuclear Regulatory Commission, 'TMI-1 Steam Generator Tube Inspection Report," dated May 22, 2014
- 2) Letter from John G. Lamb (U.S. Nuclear Regulatory Commission) to M. J. Pacilio (Exelon Generation Company, LLC), 'Three Mile Island, Unit 1 - Request for Additional Information Regarding the Fall 2013 Steam Generator Tube Inspections (TAC NO. MF4192)," dated October 20, 2014 By letter dated May 22, 2014, Exelon Generation Company, LLC (Exelon) submitted information summarizing the results of the results of the 2013 steam generator (SG) tube inspections performed at Three Mile Island, Unit 1 (TMI-1) during refueling outage 1 R20 (Reference 1). TMI-1 Technical Specification 6.9.6 requires a report of the inspection results be submitted within 180 days after reactor coolant temperature exceeds 200 0 F.
The results of the examinations are documented in Reference 1.
In the Reference 2 letter, the U.S. Nuclear Regulatory Commission requested information regarding Reference 1. Attached is a response to these questions.
There are no regulatory commitments in this letter.
Response to Request for Additional Information Related to the Fall 2013 Steam Generator Inspections November 17, 2014 Page 2 If you have any questions concerning this letter, please contact Michael D. Fitzwater at 717-948-8228.
Respectfully, R. W. Libra Site Vice President, Three Mile Island Unit 1 Exelon Generation Co., LLC RWL/mdf cc: USNRC Region I, Regional Administrator USNRC Senior Resident Inspection, TMI-1 USNRC Project Manager, TMI-1 R. A. Janati, Bureau of Radiation Protection
ATTACHMENT 1 Response to Request for Additional Information Related to the Fall 2013 Steam Generator Inspections
Attachment 1 Page 1 of 4 Question 1:
Please discuss the results of any plug inspections. Were all plugs confirmed to be present and free of degradation? Please list the tubes that were plugged in RFO 19 and RFO 20.
Response
During the most recent TMI-1 Steam Generator inspections (T1 R20), a 100% visual examination was performed on all hot and cold leg plugs for both newly installed and previously installed plugs. The newly installed plugs are examined to validate proper location and installation. The previously installed plugs are visually examined for evidence of degradation or leakage and to verify all plugs are present in accordance with Section 6.9.1 of the EPRI Steam Generator Examination Guidelines, Revision 7. All examinations were completed satisfactorily with no degradation or leakage observed.
Tables 1 and 2 include a list of all tubes plugged during Refuel Outage (RFO) 19 (T1 R1 9, Fall 2011) and RFO 20 (T1 R20, Fall 2013). In addition, Table 3 identifies the cumulative plugging in both TMI-1 steam generators relative to the 5% plugging limit.
Table 1: 'A' Steam Generator Plugging List TIR19 SG-A Tube Plugging List Outage Row Tube Tube ID Plugged T1R19 26 36 26-36 T1R19 26 37 26-37 T1R19 114 40 114-40 T1R19 115 40 115-40 TI R20 SG-A Tube Plugging List Outage Row Tube Tube ID Plugged T1 R20 69 132 69-132
Attachment 1 Page 2 of 4 Table 2: 1 Steam Generator Plugging List T1 R19 SG-B3 Tube Plugging List Outage Plugged Row Tube Tube ID Outage Plugged Row Tube Tube ID T1R19 1 4 1-4 T1R19 2 20 2-20 T1R19 1 5 1-5 T1R19 2 21 2-21 T1R19 1 6 1-6 T1R19 2 22 2-22 T1R19 1 7 1-7 T1R19 2 23 2-23 T1R19 1 8 1-8 T1R19 2 24 2-24 T1R19 1 14 1-14 T1R19 2 26 2-26 T1R19 1 15 1-15 T1R19 3 11 3-11 T1R19 1 20 1-20 T1R19 3 27 3-27 T1R19 1 21 1-21 T1R19 3 30 3-30 T1R19 1 22 1-22 T1R19 14 76 14-76 T1R19 2 2 2-2 T1R19 15 79 15-79 T1R19 2 3 2-3 T1R19 16 80 16-80 T1R19 2 6 2-6 T1R19 151 24 151-24 T1R19 2 8 2-8 T1R19 51 102 51-102 T1R19 2 9 2-9 T1R19 116 36 116-36 T1R19 2 17 2-17 T1R19 117 36 117-36 T1R19 2 18 2-18 T1R20 SG-B Tube Plugging List Outage Plugged Row Tube Tube ID Outage Plugged Row Tube Tube ID T1R20 1 9 1-9 T1R20 37 103 37-103 T1R20 1 23 1-23 T1R20 46 117 46-117 T1R20 3 5 3-5 T1R20 48 117 48-117 T1R20 3 6 3-6 T1R20 48 118 48-118 T1R20 3 12 3-12 T1R20 48 119 48-119 T1R20 3 22 3-22 T1R20 49 118 49-118 T1R20 3 24 3-24 T1R20 49 119 49-119 T1R20 3 25 3-25 T1R20 54 121.54-121 T1R20 7 49 7-49 T1R20 94 129 94-129 T1R20 8 52 8-52 T1R20 101 119 101-119 T1R20 9 12 9-12 T1R20 102 117 102-117 T1R20 13 17 13-17 T1R20 103 118 103-118 T1R20 14 67 14-67 T1R20 103 122 103-122 T1R20 14 75 14-75 T1R20 104 118 104-118 T1R20 17 82 17-82 T1R20 107 118 107-118 T1R20 21 85 21-85
Attachment 1 Page 3 of 4 Table 3: TMI-1 Cumulative Steam Generator Plugging SGA Plug History SGB Plug History SGA SGB Total Outage TSP TTW Other Total TSP TTW Other Total Plugged Plugged Plugged PSI 0 0 0 0 0 0 0 0 0 1R19 0 4 0 4 30 3 0 33 37 1R20 1 0 0 1 31 0 0 31 32 Total (Tubes) 1 4 0 j 5 61 3 0 64 69 Total (%) 0.032% 0.410% 0.221%
Limit (%) 5.0% 5.0% 5.0%
Limit (Tubes) 779 779 1558 Notes:
PSI = Pre-service Inspection TTW = Tube-to-Tube Wear TSP Wear = Tube-to-Tube Support Plate Wear Question 2:
Please confirm that there were no tubes pulled during RFO 20.
Response
No tubes were pulled during the TMI-1 RFO 20 (T1 R20, Fall 2013) steam generator inspections.
Question 3:
Please provide the number of effective full-power years that the SGs had operated at the time of the first and second SG inservice inspections.
Response
The TMI-1 Once-Through Steam Generators (OTSGs) are in their first sequential period of operation since replacement. The length of the current inspection period is 144 effective-full power months (EFPMs) per TMI-1 plant Technical Specification 6.19.
The first operating cycle (Cycle 18) of the new steam generators was from January 23, 2010 to October 24, 2011. The total OTSG operating time at T1 R1 9 was 1.719 effective full power years (EFPYs). The second operating cycle (Cycle 19) of the TMI-1 OTSGs was from November 25, 2011 to October 28, 2013 for a length of 1.877 EFPYs.
Therefore, the cumulative operation time of the TMI-1 OTSGs as of the end of the most recent second in-service inspection (T1 R20) is 3.596 EFPYs.
Attachment 1 Page 4 of 4 Question 4:
Please discuss the results of the SG channel head inspections
Response
During the most recent TMI-1 Steam Generator inspections (T1 R20), primary channel head visual inspections were performed in both the upper and lower bowls of both steam generators. These inspections were looking for evidence of cladding degradation in accordance with the recommendations of Westinghouse in Nuclear Safety Advisory Letter (NSAL) 12-1 per the T1 R20 Degradation Assessment. The T1 R20 channel head inspections were completed satisfactorily with no degradation observed.
