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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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Exelon Generation TMl-16-102 December 22, 2016 U.S. Nuclear Regulatory Commission ATIN: 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 Three Mile Island Unit 1 Route 441 South, P.O. Box 480 Middletown, PA 17057 Telephone 717-948-8000
Subject:
Supplemental Information
-TMl-1 Steam Generator Tube Inspection Report for Refueling Outage T1R21
Reference:
Exelon Generation
- Company, LLC Letter to USN RC TMl-1 Steam Generator Tube Inspection Report for Refueling Outage T1R21, dated May 21, 2016 (TMl-16-015)
In the above reference, Exelon Generation
- Company, LLC (EGC) provided a report on the completed examination oftubing in the TMl-1 steam generators during Refueling Outage T1R21. An issue was discovered during a subsequent review of the report, determined to be a typographical error. The typographical error occurred when a table was re-created from the original vendor's report. The total number of plugged tubes was correctly reported.
The breakdown by wear mechanism was incorrectly reported for the "B" steam generator.
The attached is a corrected page 13 of 226 for the referenced report. The correction pertains to the table on page 13 titled "Table 3: TMl-1 Tube Plugging History" and under the "TSP wear" and "TIW" columns for "SGB Plug History";
the summation "Total (Tubes)"
row should read 192 for "TSP wear" instead ofthe original report listing of 195, and the summation "Total (Tubes)"
row should read 3 for "TIW" instead of the original report listing of 0 (zero). All other information in the table is correct.
No new regulatory commitments are established by this submittal.
If you have any questions or additional information is needed, please contact Mike Fitzwater at 717-948-8228.
Respectfully, CJ n JOJL Site Vice President, Three Mile Island Unit 1 Exelon Generation
- Company, LLC cc: NRC Regional Administrator
-Region I NRC Senior Resident Inspector-Three Mile Island Nuclear Station NRC Project Manager, NRR -Three Mile Island Nuclear Station R. R. Janati, Chief, Division of Nuclear Safety, Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection Attachment TMl-1 Steam Generator Tube Inspection Report for Refueling Outage T1R21-Corrected Attachment 1, Page 13 of 226 TMI-16-015 (TS 6.9.6.e.)
Number of tubes plugged during the inspection outage for each degradation mechanism:
A total of one hundred thirty-four
( 134) tubes were plugged and stabilized during TlR2 I. Three (3) tubes in SG 'A' were preventatively plugged based on engineering judgment due to growth rates and number of indications.
One hundred thirty-one (131) tubes in SG 'B' were plugged for TSP wear. Twenty-five (25) of these tubes required plugging based on having indications at or above the Technical Specification limit of 40% Through Wall (TW). The other 106 tubes were preventatively plugged -the majority of these were in the "W-Axis" region of the periphery (Rows l-4). There were no tubes plugged in either SG due to the TTW degradation mechanism.
(TS 6.9.6.f.)
The number and percentage of tubes plugged to date, and the effective plugging percentage in each steam generator:
There were no tubes plugged prior to TlRI 9. Table 3 shows the number of tubes plugged during each of the three steam generator inspections and the cumulative number of tubes plugged to date. Table 3: 'fMl-1 Tube Plugging History SGA Pluiz Historv SGB Plu1* Historv Outage TSP SGA TSP SGB Total TTW Other Total TTW Other Total Plugged Wear Plum!"ed Wear Plu1mcd PSI 0 0 0 0 0 0 0 0 0 T1R19 0 4 0 4 30 3 0 33 37 T1R20 1 0 0 1 31 0 0 31 32 T1R21 3 0 0 3 131 0 0 131 134 Total 4 4 0 8 192 3 0 195 203 (Tubes) Total(%)
0.051% 1.25% 0.65% Limit(%)
5.00% 5.00% 5.00% Limit 779 779 1558 (Tubes) Note: There are 15,597 tubes per Steam Generator.
There are no sleeves or repairs other than plugs with stabilizers installed in the steam generators.
The effective plugging percentage is the same as the actual plugged tube percentage.
Following TIR2l, the effective plugging percentage for SG 'A' is 0.051 % and for SG 'B' 1.25%. Attachment 1 , Page 13 of 226