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Category:Letter
MONTHYEARML24240A1692024-09-18018 September 2024 Cy 2023 Summary of Decommissioning Trust Fund Status ML24242A3032024-09-0909 September 2024 Letter - Three Mile Island Station, Unit 2, Issuance of Amendment No. 68, Historic and Cultural Resources IR 05000320/20240012024-08-28028 August 2024 TMI-2 Solutions, LLC, Three Mile Island Nuclear Station, Unit 2 - NRC Inspection Report Nos. 05000320/2024001 and 05000320/2024002 ML24240A2222024-08-27027 August 2024 Response to Request for Additional Information for the TMI-2 Post-Shutdown Decommissioning Activities Report, Rev. 6 ML24220A2742024-08-15015 August 2024 Request for Additional Information Clarification Call Regarding Three Mile Island Station, Unit 2, Amended Post-Shutdown Decommissioning Activities Report, Rev. 6 ML24135A3292024-08-0909 August 2024 Amendment No 68, Historic and Cultural Resources Cover Letter IR 07200077/20240012024-06-18018 June 2024 Constellation Energy Generation, LLC, Three Mile Island Nuclear Station, Unit 1 - NRC Inspection Report No. 07200077/2024001 ML24135A1972024-06-13013 June 2024 – Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0091 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) ML24157A3672024-06-13013 June 2024 Updated Post-Shutdown Decommissioning Activities Report Request for Additional Information Transmittal Letter ML24151A6482024-06-0303 June 2024 Changes in Reactor Decommissioning Branch Project Management Assignments for Some Decommissioning Facilities ML24120A3242024-05-24024 May 2024 TMI-2 Email to Fws RS-24-055, 2023 Corporate Regulatory Commitment Change Summary Report2024-05-17017 May 2024 2023 Corporate Regulatory Commitment Change Summary Report ML24121A2472024-04-29029 April 2024 and Three Mile Island, Unit 2 - 2023 Occupational Radiation Exposure Annual Report ML24120A2552024-04-29029 April 2024 Annual Radiological Environmental Operating Report ML24113A0212024-04-18018 April 2024 (TMI-2), Supplement to Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation RS-24-002, Constellation Energy Generation, LLC - Annual Property Insurance Status Report2024-04-0101 April 2024 Constellation Energy Generation, LLC - Annual Property Insurance Status Report ML24065A0042024-03-28028 March 2024 Submittal of 2023 Aircraft Movement Data Annual Report ML24088A0122024-03-28028 March 2024 Notification of Amended Post-Shutdown Decommissioning Activities Report (PSDAR) in Accordance with 10 CFR 50.82(a)(7), Revision 6 ML24092A0012024-03-28028 March 2024 (TMI-2), Decommissioning Trust Fund Annual Report ML24085A2152024-03-25025 March 2024 (TMI-2) - Annual Notification of Property Insurance Coverage RS-24-023, Report on Status of Decommissioning Funding.2024-03-22022 March 2024 Report on Status of Decommissioning Funding. ML24052A0602024-03-20020 March 2024 – Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0061 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) ML24074A3922024-03-14014 March 2024 Response to Request for Additional Information for the TMI-2 Post-Shutdown Decommissioning Activities Report, Rev. 5 ML24075A0062024-03-14014 March 2024 List of Threatened and Endangered Species That May Occur in Your Proposed Project Location or May Be Affected by Your Proposed Project ML24073A2312024-03-13013 March 2024 and Three Mile Island Nuclear Station, Unit 2 - Management Change ML24044A0092024-02-12012 February 2024 License Amendment Request – Three Mile Island, Unit 2, Historic and Cultural Resources Review, Response to Request for Additional Information IR 05000320/20230042024-02-0707 February 2024 TMI-2 Solutions, LLC, Three Mile Island Nuclear Station, Unit 2 - NRC Inspection Report 05000320/2023004 ML24038A0222024-02-0505 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 ML23354A2112023-12-20020 December 2023 Response to Request for Additional Information for the TMI-2 Post-Shutdown Decommissioning Activities Report, Rev. 5 ML23354A2062023-12-20020 December 2023 (TMI-2), Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation 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 IR 05000289/20230052023-08-14014 August 2023 Constellation Energy Generation, LLC, Three Mile Island Nuclear Station, Unit 1 - NRC Inspection Report 05000289/2023005 ML23216A1772023-08-14014 August 2023 Consultation Letter to Rebecca Countess for TMI-2 ML23216A1782023-08-14014 August 2023 Consultation Letter to Steve Letavic for TMI-2 ML23216A1732023-08-14014 August 2023 Consultation Letter to Christine Turner for TMI-2 ML23216A1752023-08-14014 August 2023 Consultation Letter to Joanna Cain for TMI-2 ML23216A1742023-08-14014 August 2023 Consultation Letter to David Morrison 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 ML23138A0662023-05-17017 May 2023 TMI-2 NHPA Section 106 Shpo Letter to NRC 5-17-23 2024-09-09
[Table view] Category:Confirmatory Action Letter (CAL)
[Table view] |
Text
10 CFR 50.55a TMI-11-166 December 2, 2011 U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No.DPR-50 NRC Docket No.50-289
Subject:
Closeout of Commitment Associated with Relief Request RR-1 0-02 Concerning the Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds and Completion of Inspection Commitments Associated with the Confirmatory Action Letter NRR-07-029
References:
1)Letter from P.B.Cowan (Exelon Generation Company, LLC)to U.S.Nuclear Regulatory Commission,"Submittal of Relief Request RR-10-02 Concerning the Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds," dated September 30,2010 2)Letter from P.Bamford (U.S.Nuclear Regulatory Commission) to M.J.Pacilio,"Three Mile Island Nuclear Station, Unit 1-Request for Additional Information Regarding Relief Request RR-10-02, Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds (TAC NO.ME4795)," dated February 28,2011 3)Letter from D.P.Helker (Exelon Generation Company, LLC)to U.S.Nuclear Regulatory Commission,"Response to Request for Additional InformationSubmittal of Relief Request RR-10-02 Concerning the Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds," dated March 9, 2011 4)Letter from D.P.Helker (Exelon Generation Company, LLC)to U.S.Nuclear Regulatory Commission,"Response to Request for Additional InformationSubmittal of Relief Request RR-10-02 Concerning the Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds," dated April 6, 2011 Closeout of Commitments*
Relief Request RR-10-02 and Confirmatory Action Letter NRR-07-029 December 2, 2011 Page 2 5)Letter from D.P.Helker (Exelon Generation Company, LLC)to U.S.Nuclear Regulatory Commission,"Response to Request for Additional InformationSubmittal of Relief Request RR-10-02 Concerning the Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds," dated April 25, 2011 6)Letter from H.K.Chernoff (U.S.Nuclear Regulatory Commission) to M.J.Pacilio (Exelon Generation Company, LLC),"Three Mile Island Nuclear Station, Unit 1-Proposed Alternative RR-10-02 Regarding Weld Overlay of the Pressurizer Spray Nozzle to Safe-End and Safe-End to Elbow Dissimilar Metal Welds (TAC NO.ME4795)," dated August 15, 2011 7)Letter from C.Haney (U.S.Nuclear Regulatory Commission) to C.G.Pardee (AmerGen Energy Company, LLC),"Three Mile Island Nuclear Station, Unit 1-Acknowledgement of Actions Taken for Confirmatory Action Letter NRR-07-029 (TAC NO.MD4191)," dated January 29,2008 In the Reference 1 letter, Exelon Generation Company, LLC (Exelon)requested relief to perform a weld overlay of pressurizer spray nozzle to safe-end and safe-end to elbow dissimilar metal welds at Three Mile Island Nuclear Station (TMI), Unit 1.In the Reference 6 letter, the U.S.Nuclear RegulatoryCommissionapproved this relief request.As discussed in the Reference 1 submittal, Exelon committed to providing the results of the ultrasonic examination of the structural weld overlay on the TMI, Unit 1 pressurizer spray nozzle welds PR-009BM and SP-021 BM within 30 days after the completion of the last ultrasonic examination of the weld overlays during the fall 2011 TMI, Unit 1refuelingoutage.
The results would include a list of the indications detected, the disposition of all the indications using the standards of ASME Section XI, Nonmandatory Appendix 0, and the type and, if possible, the nature of the indications.
During the recent TMI, Unit 1refuelingoutage, the identified welds were successfully overlaid.Ultrasonic examinations of these overlays did not identify any indications.
It is noted that during initial ultrasonic examination and dimensional verification of the weld overlay, it was discovered that the weld overlay was approximately
0.3 inches
too short on the elbow side of the overlay.Additional weld material was added to the length of the overlay to bring the length within original design requirements and allow 100%coverage of the required ultrasonic examination volume.Accordingly, this commitment is complete.It is also noted that in Reference 7, the U.S.Nuclear Regulatory Commission acknowledged completion of the commitments associated with the mitigation of the Alloy 600/82/182 pressurizer butt welds with the exception of the commitment to re-examine with ultrasonic techniques the unmitigated welds identified in Confirmatory Action Letter NRR-07-029.
As stated in Reference 7, Confirmatory Action Letter NRR-07-029 would remain open until all commitments are completed.
With the weld overlay of the pressurizer spray nozzle welds PR-009BM and SP-021 BM, the Alloy 600/82/182 pressurizer butt welds identified in Confirmatory Action Letter NRR-07-029 have been mitigated.
Accordingly, the commitment to re-examine with ultrasonic techniques the unmitigated welds identified in the Confirmatory Action Letter NRR-07-029 is complete.
Closeout of Commitments
-Relief Request RR-10-02 and Confirmatory Action Letter NRR-07-029 December 2, 2011 Page 3 There are no regulatory commitments in this letter.If you have any questions concerning this letter, please contact Tom Loomis at (610)765-5510.Respectfully, Michael D.Jesse Director-Licensing&Regulatory Affairs Exelon Generation Company, LLC cc: Regional Administrator, Region I, USNRC USNRC Senior Resident Inspector, TMI USNRC Project Manager,[TMI]USNRC