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MONTHYEARML24149A1332024-05-29029 May 2024
Pre-Submittal Meeting for Proposed License Amendment Regarding Hydrologic Analysis Updates Public Portion Meeting Slides
Project stage: Meeting
2024-05-29
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Category:Meeting Summary
MONTHYEARML24176A1252024-06-28028 June 2024
Summary of Partially Closed Meeting with Tennessee Valley Authority to Discuss a Proposed License Amendment Request Regarding the Hydrologic Analysis Updates
ML24155A0422024-06-13013 June 2024
Meeting Summary: Public Scoping Webinars for the Environmental Review of the Subsequent License Renewal Application for Browns Ferry Nuclear Plant, Units 1, 2, and 3
ML24142A5152024-05-28028 May 2024
April 22, 2024, Summary of Public Mtg with Tennessee Valley Authority to Discuss Use of Risk-Informed Process Evaluation for a Proposed License Amendment Request Elimination of Limiting Condition for Operation Actions for the Rod Worth Mini
ML24155A0432024-04-18018 April 2024
Meeting Summary
ML24008A1592024-01-18018 January 2024
Summary of December 13, 2023, Meeting with Tennessee Valley Authority Regarding a Proposed Change to the Tennessee Valley Authority Nuclear Quality Assurance Plan
ML23270A0702023-09-26026 September 2023
SLRA Pre-Application Meeting Summary 09-13-2023
ML23157A1272023-06-13013 June 2023
Meeting Summary for Environmental Pre-Submittal Meeting for Subsequent License Renewal Application on May 11, 2023
ML23142A2132023-05-22022 May 2023
Public Meeting Summary - 2022 Annual Assessment Meetings for Browns Ferry, Sequoyah and Watts Bar Nuclear Plants
ML22319A1952022-12-0202 December 2022
Summary of October 13, 2022, Meeting with Tennessee Valley Authority to Discuss Planned Alternative Requests for the Fifth 10-Year Inservice Testing Program Interval for Brown'S Ferry Nuclear Plant, Units 1, 2, and 3
ML22298A1612022-11-17017 November 2022
Summary of Public Meeting on SAMA with TVA
ML22266A2742022-09-28028 September 2022
Summary of September 22, 2022, Public Meeting with Tennessee Valley Authority to Discuss a Request to Use a Later Edition of the ASME OM Code
ML22108A1842022-04-18018 April 2022
TVA 2021 Annual Assessment Public Meeting Summary
ML22103A2472022-04-14014 April 2022
Summary of April 12, 2022, Closed Meeting with Tennessee Valley Authority to Discuss Recently Identified Errors Potentially Affecting the Browns Ferry Revised Criticality Analysis License Amendment Request
ML22094A1112022-04-0404 April 2022
Public Meeting Summary 2021 Annual Assessment Meeting Catawba Dockets Nos. 50-413 and 50-414; McGuire No. 50-369 and 50-370; Oconee. 50-269, 50-270, and 50-287
ML22083A0762022-03-24024 March 2022
Summary of March 17, 2022, Closed Meeting with Tennessee Valley Authority to Discuss Recently Identified Errors Potentially Affecting the Browns Ferry Atrium 11 License Amendment Request (EPID L-2021-LLA-0132
ML21291A0092021-11-0303 November 2021
Tennessee Valley Authority Fleet - Summary of October 13, 2021, Teleconference with Tennessee Valley Authority to Discuss Planned License Amendment Requests Related to the Emergency Action Level Scheme
ML21266A0532021-10-20020 October 2021
Summary of September 22, 2021, Meeting with Tennessee Valley Authority Regarding Planned License Amendment Request to Adopt Technical Specifications Task Force (TSTF)-205 and TSTF-563
ML21273A1922021-10-12012 October 2021
September 27, 2021, Summary of Meeting with Browns Ferry Nuclear Plant, Units 1 & 2 Related to a Planned Alternative Request Per American Society of Mechanical Engineers (Asmee) Code Case N-526, Alternative Requirements for Successive Sect
ML21251A1122021-09-14014 September 2021
Summary of September 7, 2021, Teleconference with Tennessee Valley Authority to Discuss a Planned License Amendment
ML21165A1482021-06-30030 June 2021
Summary of Closed Meeting with Tennessee Valley Authority to Discuss Planned Requests for Exemption from Certain Requirements of 10 CFR Part 37
ML21155A0212021-06-0808 June 2021
Summary of Teleconference with Tennessee Valley Authority to Discuss a Planned License Amendment
ML21137A0022021-05-17017 May 2021
Public Meeting Summary - Browns Ferry, Sequoyah and Watts Bar Nuclear Plants, Docket Nos. 50-259, 50-260, 50-296, 50-327, 50-328, 50-390, and 50-391, Meeting Number 20210392
ML20357A0092021-01-19019 January 2021
Summary of December 17, 2020, Teleconference with Tennessee Valley Authority Regarding Planned License Amendment Request Related to Use of Alternate Probability of Detection at Watts Bar Nuclear Plant, Unit 2
ML20175A8012020-08-11011 August 2020
Summary of June 23, 2020, Public Meeting with Tennessee Valley Authority to Discuss a Planned License Amendment
ML20162A1532020-06-25025 June 2020
Summary of June 8, 2020, Partially Closed Meeting with Tennessee Valley Authority to Discuss a Planned License Amendment
ML20127H8412020-05-0606 May 2020
Public Meeting Summary - Browns Ferry, Sequoyah and Watts Bar Nuclear Plant, Meeting No. 20200384
ML20094M9012020-04-13013 April 2020
Summary of April 2, 2020 Public Meeting with Tennessee Valley Authority Regarding the Future Submittal of a License Amendment Request Adoption of 10 CFR 50.69
ML19120A2882019-06-0606 June 2019
Summary of March 19, 2019, Closed Meeting with Tennessee Valley Authority a License Amendment Request to Implement Maximum Extended Line Limit Analysis Plus
ML19120A3692019-04-30030 April 2019
Public Meeting Summary - Browns Nuclear Plant, Docket No. 50-259, 50-260, and 50-296
ML18242A4882018-09-24024 September 2018
Summary of Pre-Application Conference Call with Tennessee Valley Authority to Discuss Proposed Changes to Modifications Associated with Approved NFPA 805 for Browns Ferry Nuclear Plant, Units 1, 2, and 3
ML18101A1012018-04-13013 April 2018
Summary of March 16, 2018, Meeting with Tennessee Valley Authority Regarding a License Amendment Request to Implement Maximum Extended Load Line Limit Analysis Plus for Browns Ferry Nuclear Plant
ML18068A0792018-03-15015 March 2018
Summary of Pre-Application Meeting with Tennessee Valley Authority Regarding a Planned License Amendment Request Associated with Modifications to the Control Bay Chillersystems at Browns Ferry Units 1, 2 and 3
ML18053A5362018-03-0101 March 2018
Summary of February 7, 2018, Pre-Application Conference Call with TVA a Planned License Amendment Request to Change the Emergency Response Organization Staffing
ML17278A8972017-10-17017 October 2017
Summary of Meeting with TVA Regarding Hydrology-Related Licensing Actions, Browns Ferry, Units 1, 2, and 3, Sequoyah Nuclear, Units 1 and 2 and Watts Bar Nuclear Plant, Units 1 and 2(EPID L2016-TOP-0011; CAC Nos. MF8391-MF8397
ML17227A5142017-09-0101 September 2017
Summary of August 1, 2017, Pre-Submittal Public Meeting with TVA Regarding a Class 1E Unbalanced Voltage Relay Licensing Amendment Request for Browns Ferry Nuclear Plant, Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant
ML17131A2512017-05-11011 May 2017
Summary of Public Meeting Concerning Annual Assessment of Browns Ferry Nuclear Plant, Units 1, 2, and 3
ML17061A6722017-04-0606 April 2017
Summary of February 15, 2017, Meeting with Tennessee Valley Authority on Updates to the Transmission System Regarding Extended Power Uprate for Browns Ferry Nuclear Plant, Units 1, 2, and 3
ML17017A4552017-02-0303 February 2017
Summary of Meeting with Tennessee Valley Authority Regarding Maximum Extended Load Line Limit Plus Pre-Application Meeting for Browns Ferry Nuclear Plant
ML16350A2962016-12-14014 December 2016
Enclosure 3- Reactor Oversight Process Task Force FAQ Log- November 16, 2016
ML16280A2912016-10-31031 October 2016
September 23, 2016, Summary of Public Meeting with TVA Regarding Hydrology-Related Licensing Actions, Browns Ferry Nuclear Plant, Units 1, 2, and 3, Sequoyah Nuclear Plant, Units 1 & 2 and Watts Bar Nuclear Plant, Units 1 & 2 (CAC Nos. MF83
ML16279A2332016-10-0505 October 2016
Summary of Closed Pre-Decisional Enforcement Conference with Tennessee Valley Authority Regarding Browns Ferry Nuclear Plant
ML16210A4532016-08-16016 August 2016
07/19/2016 Summary of Meeting with Tennessee Valley Authority Regarding Extended Power Uprate License Amendment Request for Browns Ferry Nuclear Plant (CAC Nos. MF6741, MF6742, and MF6743)
ML16193A4602016-07-21021 July 2016
June 23, 2016, Summary of Closed Meeting with Tennessee Valley Authority Regarding the Structural Adequacy of Steam Dryers for Extended Power Uprate License Amendment Request for Browns Ferry Nuclear Plant, Units 1, 2, and 3 (MF6741, MF6742
ML16153A1982016-06-0101 June 2016
2015 EOC Meeting Summary
ML16043A2772016-03-14014 March 2016
Summary of Meeting with Tennessee Valley Authority Regarding a License Amendment Request to Modify Browns Ferry Technical Specifications (TS) by Adding New TS 3.3.8.3 (CAC Nos. MF6738, MF6739 and MF6740)
ML15321A4942015-11-30030 November 2015
Summary of Public Meeting with Tennessee Valley Authority Regarding the Planned Extended Power Uprate License Amendment Request for Browns Ferry Nuclear Plant
ML15295A2602015-11-0404 November 2015
July 14, 2015, Summary of Public Meeting with Tennessee Valley Authority to Discuss Topics Regarding Seismic Risk Evaluations Related to the Seismic Hazard Reevaluation for Browns Ferry Nuclear Plant (TACs MF3764, MF3765 and MF3766)
ML15146A2792015-05-21021 May 2015
Bf EOC Meeting Summary 2015
ML14204A2672014-08-15015 August 2014
Summary of July 10, 2014, Meeting Between the Tennessee Valley Authority and the Nuclear Regulatory Commission to Discuss Near-Term Task Force Recommendation 2.1 Flooding Hazard Reevaluation Report and Improved Mitigation System Quarterly U
ML14197A6082014-08-0606 August 2014
July 1, 2014, Summary of Category 1 Public Meeting with Tennessee Valley Authority to Discuss Seismic Hazard Reevaluations Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2.1
2024-06-28
[Table view] |
Text
June 28, 2024
LICENSEE: Tennessee Valley Authority
FACILITY: Browns Ferry Nuclear Plant, Units 1, 2, and 3
SUBJECT:
SUMMARY
OF MAY 29, 2024, PARTIALLY CLOSED MEETING WITH TENNESSEE VALLEY AUTHORITY TO DISCUSS A PROPOSED LICENSE AMENDMENT REQUEST REGARDING THE HYDROLOGIC ANALYSIS UPDATES (EPID L-2024-LRM-0053)
On May 29, 2024, the U.S. Nuclear Regulatory Co mmission (NRC) staff held a partially closed meeting with representatives of the Tennessee Valley Authority (TVA, the licensee) to discuss a proposed license amendment request (LAR) for Browns Ferry Nuclear Plant, Units 1, 2, and 3 (Browns Ferry). The meeting notice and agenda for this meeting, dated April 16, 2024, are available at Agencywide Documents Access and Management System (ADAMS) Accession No. ML24122A556. The licensees slides for the public portion of the meeting are available at ADAMS Accession No. ML24149A133. A list of the meeting attendees is enclosed.
The Browns Ferry design basis hydrological model is described in Section 2.4, Appendix 2.4A, of the Browns Ferry Updated Final Safety Analysis Report. Currently, the model uses historical TVA unsteady flow software called Simulated Open Channel Hydraulics (SOCH), which has limited capability, requiring manual interface s between multiple river model segments and dam rating curve balancing in the performance of hydrological analysis. TVA identified issues with spillway dam stability assumptions, which required an update of the design basis model. TVA decided to utilize the US Army Corps of Engineer (USACE) Hydraulics Engineering Center-River Analysis Software (HEC-RAS) for t he update and to apply the NRC-approved Topical Report TVA-NPG-AWA16-A for probable maximum pr ecipitation (PMP) for consistency with the assumptions (except Chickamauga Dam boundary assumptions) in the Sequoyah Nuclear Plant and Watts Bar Nuclear LARs.
TVA briefly described the PMP methodology employed in Topical Report TVA-NPG-AWA16-A.
The methodology defines rainfall depth-area-duration data for three storm types (i.e., local, general, and tropical) on a gridded network over the TVA drainage basin comprising dozens of sub-basins. Browns Ferry is located in sub-basin 65. TVA described the areal distribution of gridded rainfall which utilizes PMP nesting criteria. Nested total rainfall depths were developed for certain time increments from 1 to 72-hour durations and applied to each of the TVA sub-basins. TVA noted that use of gridded rainfall allows a more detailed analysis of PMP events.
TVA described the seven key updates for the hydrologic analysis, which are: (1) changed PMP bases document and application of precipitation to the upstream drainage basins; (2) revised process of determining the controlling PMP storms and resulting probable maximum flood; (3) changed hydrological modeling software to HEC-RAS, utilizing the same basic model as Sequoyah and Watts Bar; (4) updated the criteria applied in the determination of dam stability and applied revised stability results in the model; (5) updated overland windspeed data; (6)
added the seismically-induced dam failure flooding analysis; and (7) revised the warning time hydrologic basis for rainfall on rivers and streams and seismically-induced dam failure floods.
TVA noted that the scope of the Browns Ferry LAR is the same as the scope of the Sequoyah amendment, which was approved on March 26, 2024. TVA plans to submit the LAR for Browns Ferry in September 2024. The NRC staff asked TVA why it decided to prepare an LAR rather than perform the update to analysis under the criteria in section 50.59 of Title 10 of the Code of Federal Regulations. TVA stated that the NRC staffs safety evaluation for the topical report indicated that an LAR should be submitted.
No regulatory decisions were made at this meeting.
No comments or public meeting feedback forms were received.
Please direct any inquiries to me at 301-415-1627 or Kimberly.Green@nrc.gov.
/RA/
Kimberly J. Green, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
Docket Nos. 50-259, 50-260, and 50-296
Enclosure:
List of Attendees
cc: Listserv LIST OF ATTENDEES
MAY 29, 2024, PARTIALLY CLOSED MEET ING WITH TENNESSEE VALLEY AUTHORITY
PROPOSED LICENSE AMENDMENT REQUEST REGARDING HYDROLOGIC ANALYSIS
UPDATES FOR BROWNS FERRY NUCLEAR PLANT, UNITS 1, 2, AND 3
Name Organization Kim Green U.S. Nuclear Regulatory Commission (NRC)
Ken See NRC Deanna Zhang NRC Barbara Hayes NRC Perry Buckberg NRC Scott DeNeale Oak Ridge National Laboratory
Andy Taylor Tennessee Valley Authority (TVA)
Karen Carboni TVA Dennis Lundy TVA Steve Carlyle TVA Don Lewis TVA Janelle Schlamp TVA Tom Spink TVA Stu Henry Barge Design Robbie Blackwell Barge Design
Rajiv Prasad Pacific Northwest National Laboratory Sheryl Sweet Florida Power and Light Chris Rochon EPRI
Enclosure
ML24176A127 (Package)
ML24176A125 (Meeting Summary)
ML24122A556 (Meeting Notice)
ML24149A133 (Slides)
OFFICE NRR/DORL/LPL2-2/PM NRR/DORL/LPL2-2/LA NRR/DORL/LPL2-2/BC NRR/DORL/LPL2-2/PM NAME KGreen ABaxter DWrona KGreen DATE 06/21/24 06/27/24 06/27/24 06/28/24
