Letter Sequence Other |
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Results
Other: CNL-14-222, First Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident., CNL-15-132, Second Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order-Number., CNL-16-098, Fourth Six-Month Status Report in Response to the June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, CNL-16-182, Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, ML14356A362
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MONTHYEARCNL-15-132, Second Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order-Number.2014-06-29029 June 2014 Second Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order-Number. Project stage: Other CNL-14-100, Tennessee Valley Authority'S Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident2014-06-30030 June 2014 Tennessee Valley Authority'S Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Project stage: Request CNL-14-222, First Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident.2014-12-19019 December 2014 First Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident. Project stage: Other ML14356A3622015-02-11011 February 2015 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-13-109 (Severe Accident Capable Hardened Vents) Project stage: Other CNL-16-098, Fourth Six-Month Status Report in Response to the June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2016-06-30030 June 2016 Fourth Six-Month Status Report in Response to the June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions Project stage: Other CNL-16-182, Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2016-12-22022 December 2016 Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions Project stage: Other 2014-06-30
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Category:Letter type:CNL
MONTHYEARCNL-24-040, Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2024-05-0808 May 2024 Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-24-036, – 10 CFR 50.46 Annual Report2024-04-25025 April 2024 – 10 CFR 50.46 Annual Report CNL-24-037, Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 422024-04-22022 April 2024 Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 42 CNL-24-033, Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2024-04-17017 April 2024 Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-24-024, Hydrologic Engineering Center River Analysis System Project Milestone Status Update2024-04-17017 April 2024 Hydrologic Engineering Center River Analysis System Project Milestone Status Update CNL-24-020, Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2, Request for Approval of Quality Assurance Program Description and Application to Revise the Technical Specifications Associated with QAPD Requirements2024-04-0101 April 2024 Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2, Request for Approval of Quality Assurance Program Description and Application to Revise the Technical Specifications Associated with QAPD Requirements CNL-24-008, Guarantee of Payment of Deferred Premiums - 2023 Annual Report2024-03-27027 March 2024 Guarantee of Payment of Deferred Premiums - 2023 Annual Report CNL-24-007, Annual Insurance Status Report2024-03-27027 March 2024 Annual Insurance Status Report CNL-24-029, Response to Request for Additional Information Regarding Tennessee Valley Authority - Request for Exemption from Specific Requirements of 10 CFR Part 372024-03-14014 March 2024 Response to Request for Additional Information Regarding Tennessee Valley Authority - Request for Exemption from Specific Requirements of 10 CFR Part 37 CNL-24-026, Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2024-03-14014 March 2024 Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation CNL-24-013, Cycle 22 Reload Analysis Report2024-03-14014 March 2024 Cycle 22 Reload Analysis Report CNL-24-023, Central Emergency Control Center Emergency Plan Implementing Procedure Revision. Includes CECC EPIP-17, Revision 252024-02-20020 February 2024 Central Emergency Control Center Emergency Plan Implementing Procedure Revision. Includes CECC EPIP-17, Revision 25 CNL-24-017, Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure and Emergency Preparedness Department Procedure Revisions2024-01-17017 January 2024 Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure and Emergency Preparedness Department Procedure Revisions CNL-23-071, Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, Inservice Inspection and Augmented Program Interval Revised Request for Alternative 0-ISI-472024-01-11011 January 2024 Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, Inservice Inspection and Augmented Program Interval Revised Request for Alternative 0-ISI-47 CNL-23-070, Submittal of Fifth 10-Year Interval Inservice Testing Program Plan2023-11-29029 November 2023 Submittal of Fifth 10-Year Interval Inservice Testing Program Plan CNL-23-067, Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2023-11-27027 November 2023 Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-23-061, Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revision2023-09-20020 September 2023 Tennessee Valley Authority - Central Emergency Control Center Emergency Plan Implementing Procedure Revision CNL-23-057, Central Emergency Control Center Emergency Plan Implementing Procedure Revisions. Includes CECC-EPIP-1, Revision 76 and CECC-EPIP-9, Revision 642023-09-0505 September 2023 Central Emergency Control Center Emergency Plan Implementing Procedure Revisions. Includes CECC-EPIP-1, Revision 76 and CECC-EPIP-9, Revision 64 CNL-23-055, Tennessee Valley Authority - Emergency Preparedness Department Procedure Revision. Includes EPDP-3, Revision 3, Emergency Plan Exercises and Preparedness Drills2023-07-25025 July 2023 Tennessee Valley Authority - Emergency Preparedness Department Procedure Revision. Includes EPDP-3, Revision 3, Emergency Plan Exercises and Preparedness Drills CNL-23-053, Tennessee Valley Authority - Radiological Emergency Plan Revisions2023-07-18018 July 2023 Tennessee Valley Authority - Radiological Emergency Plan Revisions CNL-23-025, American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI, Inservice Inspection and Augmented Program Interval Revised Request for Alternative 0-ISI-472023-07-0303 July 2023 American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI, Inservice Inspection and Augmented Program Interval Revised Request for Alternative 0-ISI-47 CNL-23-049, Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan .2023-06-26026 June 2023 Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan . CNL-23-046, Revision to Notice of Intent to Pursue Subsequent License Renewal - Schedule Submittal2023-06-0606 June 2023 Revision to Notice of Intent to Pursue Subsequent License Renewal - Schedule Submittal CNL-23-037, Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Request to Use a Later Edition of the American Society of Mechanical Engineers Operation and Maintenance Code and Alternative Request2023-06-0101 June 2023 Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Request to Use a Later Edition of the American Society of Mechanical Engineers Operation and Maintenance Code and Alternative Requests CNL-23-042, Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2023-05-16016 May 2023 Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-23-030, Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update2023-04-27027 April 2023 Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update CNL-23-032, Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 412023-04-27027 April 2023 Clinch River, Sequoyah, Units 1 and 2, Watts Bar, Unit 1 and 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 41 CNL-23-034, 10 CFR 50.46 Annual Report2023-04-26026 April 2023 10 CFR 50.46 Annual Report CNL-23-033, Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revision2023-04-24024 April 2023 Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revision CNL-23-029, Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2023-04-11011 April 2023 Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-23-023, Annual Insurance Status Report2023-03-30030 March 2023 Annual Insurance Status Report CNL-23-018, Request for Amendment Regarding Technical Specification Surveillance Requirements 3.4.3.2 and 3.5.1.11 Regarding Safety Relief Valves (BFN TS-540)2023-03-30030 March 2023 Request for Amendment Regarding Technical Specification Surveillance Requirements 3.4.3.2 and 3.5.1.11 Regarding Safety Relief Valves (BFN TS-540) CNL-23-024, TVA Guarantee of Payment of Deferred Premiums - 2022 Annual Report2023-03-29029 March 2023 TVA Guarantee of Payment of Deferred Premiums - 2022 Annual Report CNL-23-022, Decommissioning Funding Status Report2023-03-29029 March 2023 Decommissioning Funding Status Report CNL-23-027, Second Supplement to License Amendment Request to Revise Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505-A, Revision 2, Provide Risk-Informed Extended Completion Times RITSTF Initiative 4b (BFN TS-524)2023-03-29029 March 2023 Second Supplement to License Amendment Request to Revise Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505-A, Revision 2, Provide Risk-Informed Extended Completion Times RITSTF Initiative 4b (BFN TS-524) CNL-23-019, Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI, Request for Alternative BFN-0-ISI-322023-03-11011 March 2023 Response to Request for Additional Information Regarding Browns Ferry Nuclear Plant, Units 1, 2, and 3, American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI, Request for Alternative BFN-0-ISI-32 CNL-22-045, Application to Revise Technical Specifications to Adopt TSTF-566-A, Revise Actions for Inoperable RHR Shutdown Cooling Subsystems, and TSTF-580-A, Revision 1, Provide Exception from Entering Mode 42023-03-10010 March 2023 Application to Revise Technical Specifications to Adopt TSTF-566-A, Revise Actions for Inoperable RHR Shutdown Cooling Subsystems, and TSTF-580-A, Revision 1, Provide Exception from Entering Mode 4 CNL-23-021, Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2023-03-0808 March 2023 Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-22-037, Application to Revise Technical Specifications to Adopt TSTF-541-A, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position (BFN TS-533)2023-01-31031 January 2023 Application to Revise Technical Specifications to Adopt TSTF-541-A, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated Position (BFN TS-533) CNL-23-003, Browns Nuclear Plant, Units 1, 2 & 3; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Organizational Topic Report TVA-NPOD89-A2023-01-30030 January 2023 Browns Nuclear Plant, Units 1, 2 & 3; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Organizational Topic Report TVA-NPOD89-A CNL-23-008, Tennessee Valley Authority Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions2022-12-22022 December 2022 Tennessee Valley Authority Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions CNL-22-089, License Amendment Request for Adoption of TSTF-478, Revision 2, BWR Technical Specification Changes That Implement the Revised Rule for Combustible Gas Control (BFN TS-546)2022-12-20020 December 2022 License Amendment Request for Adoption of TSTF-478, Revision 2, BWR Technical Specification Changes That Implement the Revised Rule for Combustible Gas Control (BFN TS-546) CNL-22-090, Request to Use a Later Edition of the American Society of Mechanical Engineers Operation and Maintenance Code and Alternative Requests for the Fifth Inservice Testing Interval2022-12-12012 December 2022 Request to Use a Later Edition of the American Society of Mechanical Engineers Operation and Maintenance Code and Alternative Requests for the Fifth Inservice Testing Interval CNL-22-100, to Request for License Amendment Regarding Application of Advanced Framatome Methodologies, and Adoption of TSTF-564 Revision 2 for Browns Ferry Nuclear Plant Units 1, 2, and 3,in Support of Atrium 11 Fuel Use at Browns Ferry (TS-535)2022-12-0909 December 2022 to Request for License Amendment Regarding Application of Advanced Framatome Methodologies, and Adoption of TSTF-564 Revision 2 for Browns Ferry Nuclear Plant Units 1, 2, and 3,in Support of Atrium 11 Fuel Use at Browns Ferry (TS-535) CNL-22-097, Response to Request for Additional Information and Supplement to License Amendment Request to Revise Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide .2022-12-0101 December 2022 Response to Request for Additional Information and Supplement to License Amendment Request to Revise Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide . CNL-22-106, Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revision. Includes CECC EPIP-14, Revision 38, Nuclear Emergency Public Information Organization and Operat2022-11-28028 November 2022 Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revision. Includes CECC EPIP-14, Revision 38, Nuclear Emergency Public Information Organization and Operatio CNL-22-105, Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program, Revision 222022-11-0808 November 2022 Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program, Revision 22 CNL-22-099, Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update2022-10-31031 October 2022 Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update CNL-22-098, Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions. Includes CECC EPIP-7, Rev. 45 & CECC EPIP-8, Rev. 552022-10-17017 October 2022 Tennessee Valley Authority - Radiological Emergency Plan and Central Emergency Control Center Emergency Plan Implementing Procedure Revisions. Includes CECC EPIP-7, Rev. 45 & CECC EPIP-8, Rev. 55 CNL-22-055, Application to Delete Acreage Value Discussion from Technical Specifications (BFN TS-543)2022-09-29029 September 2022 Application to Delete Acreage Value Discussion from Technical Specifications (BFN TS-543) 2024-05-08
[Table view] Category:Status Report
MONTHYEARCNL-24-007, Annual Insurance Status Report2024-03-27027 March 2024 Annual Insurance Status Report IR 05000259/20230062024-02-28028 February 2024 Annual Assessment Letter for Sequoyah Nuclear Plant, Units 1, 2 - Report 05000259/2023006, 05000260/2023006 and 05000296/2023006 ML24047A2092024-02-22022 February 2024 Calendar Year 2023 Baseline Inspection Completion CNL-23-022, Decommissioning Funding Status Report2023-03-29029 March 2023 Decommissioning Funding Status Report CNL-22-099, Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update2022-10-31031 October 2022 Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status Update CNL-22-052, Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status2022-04-27027 April 2022 Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System Project Milestone Status CNL-21-048, Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Miilstone Status Update2021-04-29029 April 2021 Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Miilstone Status Update CNL-21-030, Decommissioning Funding Status Report2021-03-25025 March 2021 Decommissioning Funding Status Report CNL-21-032, Watt Bar Nuclear Plant, Units 1 and 2 - Annual Insurance Status Report2021-03-25025 March 2021 Watt Bar Nuclear Plant, Units 1 and 2 - Annual Insurance Status Report CNL-20-088, Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update2020-10-29029 October 2020 Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update CNL-20-020, Annual Insurance Status Report2020-03-20020 March 2020 Annual Insurance Status Report CNL-19-015, Final Update on Progress of Facility Modifications for MSIV Leak Rate2019-05-28028 May 2019 Final Update on Progress of Facility Modifications for MSIV Leak Rate CNL-19-046, Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update and Commitment Changes2019-04-29029 April 2019 Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update and Commitment Changes CNL-18-136, Plants: Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update2018-12-27027 December 2018 Plants: Tennessee Valley Authority - Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update CNL-19-135, Tennessee Valley Authority Browns Ferry Nuclear Plant - Ninth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe2018-12-27027 December 2018 Tennessee Valley Authority Browns Ferry Nuclear Plant - Ninth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe . CNL-18-084, Eighth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2018-06-27027 June 2018 Eighth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions CNL-18-093, Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update2018-06-22022 June 2018 Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update CNL-18-025, Annual Insurance Status Report2018-03-28028 March 2018 Annual Insurance Status Report CNL-18-017, Tenth Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2018-02-23023 February 2018 Tenth Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events CNL-17-138, Plant'S Seventh Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2017-12-20020 December 2017 Plant'S Seventh Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions CNL-17-107, Ninth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events(Order No. EA-12-049)2017-08-31031 August 2017 Ninth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events(Order No. EA-12-049) CNL-17-077, Sixth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order EA-13-109)2017-06-30030 June 2017 Sixth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order EA-13-109) CNL-17-072, Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update2017-06-27027 June 2017 Hydrologic Engineering Center River Analysis System (HEC-RAS) Project Milestone Status Update CNL-17-031, Annual Insurance Status Report2017-03-30030 March 2017 Annual Insurance Status Report CNL-17-021, Decommissioning Funding Status Report2017-03-30030 March 2017 Decommissioning Funding Status Report CNL-17-016, Eighth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2017-02-28028 February 2017 Eighth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) CNL-16-182, Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2016-12-22022 December 2016 Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions CNL-16-132, Seventh Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2016-08-26026 August 2016 Seventh Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events CNL-16-098, Fourth Six-Month Status Report in Response to the June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions2016-06-30030 June 2016 Fourth Six-Month Status Report in Response to the June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions CNL-16-036, Sixth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2016-02-26026 February 2016 Sixth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) CNL-15-254, Third Six-Month Status Report and Phase 1 and Phase 2 Overall Integrated Plan in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation.2015-12-29029 December 2015 Third Six-Month Status Report and Phase 1 and Phase 2 Overall Integrated Plan in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation. CNL-15-160, Fifth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2015-08-28028 August 2015 Fifth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051) CNL-15-159, Fifth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2015-08-28028 August 2015 Fifth Six-Month Status Report in Response to the March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) CNL-15-082, Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - April 2015 Status Report2015-04-30030 April 2015 Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - April 2015 Status Report CNL-15-036, Fourth Six-Month Status Report in Response to the March 1, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2015-02-27027 February 2015 Fourth Six-Month Status Report in Response to the March 1, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051) CNL-15-035, Fourth Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2015-02-27027 February 2015 Fourth Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) CNL-15-018, Nuclear Power Group Commercial Grade Dedication Recovery Project - January 2015 Status Report2015-01-30030 January 2015 Nuclear Power Group Commercial Grade Dedication Recovery Project - January 2015 Status Report CNL-14-222, First Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident.2014-12-19019 December 2014 First Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident. CNL-14-195, the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - October 2014 Status Report2014-10-31031 October 2014 the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - October 2014 Status Report CNL-14-132, Third Six-Month Status Report and Revised Overall Integrated Plan in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events for Bro2014-08-28028 August 2014 Third Six-Month Status Report and Revised Overall Integrated Plan in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events for Brown CNL-14-063, the Tennessee Valley Authority Nuclear Power Group Commercial Grade Dedication Recovery Project - April 2014 Status Report2014-04-30030 April 2014 the Tennessee Valley Authority Nuclear Power Group Commercial Grade Dedication Recovery Project - April 2014 Status Report CNL-14-032, Second Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2014-02-28028 February 2014 Second Six-Month Status Report in Response to the March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049) CNL-14-028, Second Six Month Status Report in Response to Order No. EA-12-051, Spent Fuel Pool Instrumentation2014-02-28028 February 2014 Second Six Month Status Report in Response to Order No. EA-12-051, Spent Fuel Pool Instrumentation CNL-14-008, the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - January 2014 Status Report2014-01-31031 January 2014 the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - January 2014 Status Report ML13093A3702013-04-0101 April 2013 Annual Insurance Status Report ML12354A1112012-12-14014 December 2012 Generic Letter 96-05 Class D Joint Owners' Group Motor Operated Valves ML1214500142012-05-23023 May 2012 NFPA 805 LAR Status Matrix - May 2012 ML1009500642010-04-0101 April 2010 Annual Insurance Status Report ML0909302852009-04-0101 April 2009 Watts Barr (WBN) Nuclear Plants - Insurance Status ML0713400902007-05-12012 May 2007 (BFN) - Completion of Unit 1 Restart Issues 2024-03-27
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Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL-16-182 December 22, 2016 10 CFR 50.4 Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296
Subject:
Tennessee Valley Authority Browns Ferry Nuclear Plants Fifth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109)
References:
- 1. NRC Order Number EA-13-109, Issuance of Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 6, 2013 (ML13143A321)
- 2. NRC Interim Staff Guidance JLD-ISG-2013-02, "Compliance with Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions,"
Revision 0, dated November 14, 2013 (ML13304B836)
- 3. NEI 13-02, Industry Guidance for Compliance with Order EA-13-109, BWR Mark I & II Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 1, dated April 23, 2015 (ML15113B318)
- 4. Letter from TVA to NRC, Tennessee Valley Authoritys Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident (Order Number EA-13-109), dated June 30, 2014 (ML14181B169)
- 5. Letter from TVA to NRC, Tennessee Valley Authority's Browns Ferry Nuclear Plant First Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109), dated December 19, 2014 (ML14353A428)
U.S. Nuclear Regulatory Commission CNL-16-182 Page 2 December 22, 2016
- 6. Letter from NRC to TVA, Browns Ferry Nuclear Plant, Units 1, 2, and 3 -
Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Phase 1 of Order EA-13-109 (Severe Accident Capable Hardened Vents)
(TAC Nos. MF4540, MF4541 and MF4542), dated February 11, 2015 (ML14356A362)
- 7. NRC Interim Staff Guidance JLD-ISG-2015-01, Compliance with Phase 2 of Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions, Revision 0, dated April 29, 2015 (ML15104A118)
- 8. Letter from TVA to NRC, Tennessee Valley Authority's Browns Ferry Nuclear Plant Second Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109), dated June 29, 2015 (ML15181A338)
- 9. Letter from TVA to NRC, Tennessee Valley Authority's Browns Ferry Nuclear Plant Third Six-Month Status Report and Phase 1 and Phase 2 Overall Integrated Plan in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109),
dated December 29, 2015 (ML15365A554)
- 10. Letter from TVA to NRC Tennessee Valley Authoritys Browns Ferry Nuclear Plant Fourth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109), dated June 30, 2016 (ML16182A517)
On June 6, 2013, the Nuclear Regulatory Commission (NRC) issued an Order (Reference 1) to Tennessee Valley Authority (TVA). Reference 1 was immediately effective and directed TVA to install a reliable hardened venting capability for instances of pre-core damage and under severe accident conditions, including those involving a breach of the reactor vessel by molten core debris.
Specific requirements are outlined in Attachment 2 of Reference 1.
Reference 1 required submission of a Phase 1 and Phase 2 Overall Integrated Plan (OIP) pursuant to Section IV, Condition D for Browns Ferry Nuclear Plant (BFN), Units 1, 2, and 3.
References 2 and 7 endorse industry guidance document Nuclear Energy Institute (NEI) 13-02, Revision 1 (Reference 3) with clarifications and exceptions identified in References 2 and 7.
Reference 3 provides direction regarding the content of the Phase 1 and Phase 2 OIPs and includes guidance for combining the OIPs.
Reference 4 provided TVAs Phase 1 OIP. The NRC issued its Interim Staff Evaluation relating to the BFN Phase 1 OIP on February 11, 2015 (Reference 6).
Reference 1 also requires submission of status reports at six-month intervals following submittal of the OIP. Reference 3 provides direction regarding the content of the status reports. TVA submitted the first six-month status report on December 19, 2014 (Reference 5), the second
U.S. Nuclear Regulatory Commission CNL-16-182 Page 3 December 22, 2016 six-month status report on June 29, 2015 (Reference 8), the third six-month status report on December 29, 2015 (Reference 9), and.the fourth six-month status report on June 30, 2016 (Reference 10) .
The purpose of this letter is to provide the combined Phase 1 and Phase 2 OIP six-month status report pursuant to Section IV, Condition D of Reference 1, which delineates progress made in implementing the requirements of Reference 1. The Enclosure provides an update of milestone accomplishments since submittal of the Phase 1 OIP (Reference 4) with previous updates (References 5, 8, 9, and 10) and the initial Phase 2 OIP (Reference 9) with previous update (Reference 10), including any changes to the compliance method, schedule, need for relief, and the basis for these changes.
There are no new regulatory comm itments resulting from this submittal. If you have any question regarding this submittal , please contact Mike Oliver at (256) 729-7874.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 22nd day of December 2016.
Respectfu Ily, J. W . Shea Vice President, Nuclear Licensing
Enclosure:
Tennessee Valley Authority Browns Ferry Nuclear Plant's Fifth Six-Month Status Report for the Implementation of Order EA-13-109, "Issuance of Order to Modify Licenses With Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions" cc (w/Enclosure) :
NRR Director - NRC Headquarters NRO Director - NRC Headquarters NRR JLD Director - NRC Headquarters NRC Regional Administrator - Region II NRR Project Manager - Browns Ferry Nuclear Plant NRR JLD Project Manager - Browns Ferry Nuclear Plant NRC Senior Resident Inspector - Browns Ferry Nuclear Plant
ENCLOSURE Tennessee Valley Authority Browns Ferry Nuclear Plants Fifth Six-Month Status Report for the Implementation of Order EA-13-109, Issuance of Order to Modify Licenses With Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions 1 Introduction Browns Ferry Nuclear Plant (BFN) developed an Overall Integrated Plan (Reference 1 in Section 8) documenting the installation of a Hardened Containment Vent System (HCVS) that provides a reliable hardened venting capability for instances of pre-core damage and under severe accident conditions, including those involving a breach of the reactor vessel by molten core debris, in response to Reference 2. Updates of milestone accomplishments will be based on the combined Phase 1 and 2 Overall Integrated Plan dated December 29, 2015.
BFN developed an updated and combined Phase 1 and 2 Overall Integrated Plan (Reference 7 in Section 8) documenting:
- 1. The installation of a Hardened Containment Vent System (HCVS) that provides a reliable hardened venting capability for instances of pre-core damage and under severe accident conditions, including those involving a breach of the reactor vessel by molten core debris, in response to Reference 2.
- 2. An alternative venting strategy that makes it unlikely that a drywell vent is needed to protect the containment from overpressure related failure under severe accident conditions, including those that involve a breach of the reactor vessel by molten core debris, in response to Reference 2 This enclosure provides an update of milestone accomplishments since submittal of the combined Phase 1 and 2 Overall Integrated Plan and previous update (Reference 9) including any changes to the compliance method, schedule, or need for relief/relaxation and the basis, if any.
2 Milestone Accomplishments No milestone(s) have been completed since the previous update (Reference 9). The status is current as of December 1, 2016.
3 Milestone Schedule Status The following provides an update to Part 5 of the combined Phase 1 and 2 Overall Integrated Plan. It provides the activity status of each item and whether the expected completion date has changed. These dates are planning dates subject to change as design and implementation details are developed.
The revised milestone target completion dates do not impact the order implementation date.
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Comments Target Activity {Include date Milestone Completion Status changes in this Date column}
Phase 1 and 2 HCVS Milestone Table Submit Overall Integrated Plan June 2014 Complete Submit 6 Month Updates:
December Update 1 Complete 2014 Update 2 June 2015 Complete Update 3 [Simultaneous with Phase 2 December Complete OIP] 2015 Update 4 June 2016 Complete December Complete Update 5 2016 with this submittal Update 6 June 2017 Not Started December Update 7 Not Started 2017 Update 8 June 2018 Not Started December Update 9 Not Started 2018 Phase 1 Specific Milestones Phase 1 Modifications:
Hold preliminary/conceptual design November Complete meeting 2014 November Modifications Evaluation Complete 2015 Unit 1 Design Engineering On-April 2016 Complete June 2016 site/Complete November Unit 1 Implementation Outage Complete 2016 Unit 1 Walk Through November Complete E-2 CNL-16-182
Comments Target Activity {Include date Milestone Completion Status changes in this Date column}
Demonstration/Functional Test 2016 Unit 2 Design Engineering On-June 2016 In Progress December 2016 site/Complete Unit 2 Implementation Outage March 2017 Not Started Unit 2 Walk Through April 2017 Not Started Demonstration/Functional Test Unit 3 Design Engineering On-July 2017 Not Started site/Complete Unit 3 Implementation Outage March 2018 Not Started Unit 3 Walk Through April 2018 Not Started Demonstration/Functional Test Phase 1 Procedure Changes Active Operations Procedure Changes July 2016 Complete Developed Site Specific Maintenance Procedure July 2016 Complete Developed November Procedure Changes Active Complete 2016 Phase 1 Training:
September Training Complete Complete 2016 Phase 1 Completion December Unit 1 HCVS Implementation Complete 2016 Unit 2 HCVS Implementation April 2017 In Progress Unit 3 HCVS Implementation March 2018 Not Started Full Site HCVS Implementation March 2018 Not Started Submit Completion Report [60 days after full June 2018 Not Started site compliance]
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Comments Target Activity {Include date Milestone Completion Status changes in this Date column}
Phase 2 Specific Milestones Phase 2 Modifications:
Hold preliminary/conceptual design meeting January 2017 Complete Modifications Evaluation April 2017 In Progress Unit 3 Design Engineering On-site/Complete May 2017 In Progress Unit 3 Implementation Outage March 2018 Not Started Unit 3 Walk Through March 2018 Not Started Demonstration/Functional Test December Unit 1 Design Engineering On-site/Complete Not Started 2017 Unit 1 Implementation Outage October 2018 Not Started Unit 1 Walk Through October 2018 Not Started Demonstration/Functional Test Unit 2 Design Engineering On-site/Complete May 2018 Not Started Unit 2 Implementation Outage March 2019 Not Started Unit 2 Walk Through March 2019 Not Started Demonstration/Functional Test Phase 2 Procedure Changes Active September Operations Procedure Changes Developed Not Started 2017 Site Specific Maintenance Procedures December Not Started Developed 2017 Procedure Changes Active March 2018 Not Started Phase 2 Training:
December Training Complete Not Started 2017 Phase 2 Completion Unit 3 HCVS Implementation March 2018 Not Started E-4 CNL-16-182
Comments Target Activity {Include date Milestone Completion Status changes in this Date column}
Unit 1 HCVS Implementation October 2018 Not Started Unit 2 HCVS Implementation March 2019 Not Started Full Site HCVS Implementation March 2019 Not Started Submit Completion Report [60 days after full May 2019 Not Started site compliance]
4 Changes to Compliance Method The following is a list of changes made to the information provided in the Combined Phase 1 and 2 Overall Integrated Plan (Reference 7). These changes were made to clarify the OIP and provide more specific information because the design process is further along than previously anticipated. These changes meet the NEI 13-02 compliance method.
Page 17 of 85. Under Power and Pneumatic Supply Sources was revised to state the following: Battery power will be provided by the existing Unit batteries unless it is determined to power the HCVS loads from the dedicated HCVS Batteries.
This was done to allow the Operator the option to transfer to the HCVS Battery if needed but not to require it. The existing Unit Battery capacity calculations include these HCVS loads.
Page 18 of 85. Under Item 2 updated OIP Open Item 1 to provide response that this OIP Open item is closed for Unit 1 as stated in the Combined Phase 1 and 2 OIP Open Item table in section 6.
Page 27 of 85. Updated OIP Open Item 3 to provide response that this Open item is closed for Unit 1 as stated in the Combined Phase 1 and 2 OIP Open Item table in section 6.
Page 27 of 85 Updated OIP Open Item 4 to provide response that this OIP Open item is closed for Unit 1 as stated in the Combined Phase 1 and 2 OIP Open Item table in section 6.
Page 29 of 85. Revised Key Parameter chart to include Unit 1 Component Identifiers.
Page 31 of 85. Updated OIP Open Item 5 to provide response as stated in the Combined Phase 1 and 2 OIP Open Item table in section 6.
Page 52 thru 55 of 85. Updated Part 5 Milestone Schedule.
Page 77 thru 85 of 85. Updated Attachment 7 to include response and status of OIP and ISE Open Items.
There are no changes to the compliance method as documented in the combined Phase 1 and 2 Overall Integrated Plan (Reference 7).
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5 Need for Relief/Relaxation and Basis for the Relief/Relaxation BFN expects to comply with the order implementation date and no relief/relaxation is required at this time.
6 Open Items from Combined Phase 1 and 2 Overall Integrated Plan and Interim Staff Evaluations The following tables provide a summary of the open items documented in the combined Phase 1 and 2 Overall Integrated Plan or the Interim Staff Evaluation (ISE) and the status of each item.
Combined Phase 1 and 2 OIP Open Item Status Phase 1 Open Items
- 1. Perform an assessment of temperature and Closed for Unit 1 - An evaluation radiological conditions to ensure that operating was performed and documented in personnel can safely access and operate controls Calculation MDQ0000642015000351, at the Remote Operating Station based on time R1, HCVS Operator Mission Dose, constraints listed in Attachment 2. and Calculation MDQ0009992014000291, R1, Temperature Response of the Reactor Building Following an Extended Loss of AC Power.
Calculation MDQ0009992014000291, R1, also evaluates the temperature response in the Diesel Building during an extended loss of AC power (ELAP) event.
Unit 2 - Open Unit 3 - Open
- 2. Perform an evaluation for HCVS ability to operate Closed - An evaluation was performed from the MCR and has the ability to be supplied and documented in Calculation adequate amounts of pneumatic pressure for 24 MDQ0000322015000347 R0, HCVS hour actions. Nitrogen System Sizing Analysis, and DCN 71389.
- 3. Perform an evaluation for FLEX portable Closed for Unit 1 - An evaluation generators and nitrogen cylinders use past 24 was performed for FLEX portable hour actions. generators and documented in a White Paper that was reviewed during FLEX audit and documented in Browns Ferry Nuclear Plant, Units 1, 2, and 3 - Report for the Onsite Audit Regarding Implementation of Mitigating Strategies and Reliable Spent Fuel Instrumentation Related to Orders EA-12-049 and EA-12-051 E-6 CNL-16-182
Combined Phase 1 and 2 OIP Open Item Status (ML15069A358). An evaluation was performed on nitrogen cylinder use documented in DCN 71389 and Calculation MDQ0000322015000347, R1, HCVS Nitrogen Sizing Analysis.
As documented in DCN 71389, nine nitrogen cylinders are required for Unit 1 for 7 days of Hardened Vent operation. There are five nitrogen cylinders installed to support Hardened Vent operation. There are six nitrogen cylinders carts with six nitrogen cylinders on each cart that are available in the FLEX Storage building with no other committed use of them.
Unit 2 - Open Unit 3 - Open
- 4. Revise 1/2/3-EOI Appendix 13 to include venting Closed for Unit 1 EOI for loss of DC power. Appendix 13, R3 was revised to include venting for loss of DC power.
Unit 2 - Open Unit 3 - Open
- 5. Perform an evaluation for FLEX portable Closed - An evaluation was generators use for post 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> actions in Severe performed and documented in Accident conditions. Engineering Information Record from AREVA (R06161114360),
Projected Dose Rate Contour Map of Shine from the HCVS Vent Line Extending Above Refueling Floor (BFNP).
- 6. Electrical load shedding will be performed in 1 Closed (Reference 6) - Calculation hour of the event. EDQ0009992013000202 R3, 250V DC Unit Batteries, 1, 2, & 3 Evaluation for the Beyond Design Basis External Event (BDBEE) ELAP, has been issued to determine load shedding impact on the unit batteries.
- 7. The implementation of the HCVS DCNs will be Closed (Reference 6) - A conceptual staged so that there is no effect on the operating meeting was held in November 2014, units. and a staging plan was used to separate the existing HWWV from the HCVS.
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Combined Phase 1 and 2 OIP Open Item Status
- 8. The wetwell vent will be designed to remove 1% Closed (Reference 6) - The existing of rated thermal power at EPU conditions. wetwell vent (CLTP) and the HCVS (EPU) have been designed for 1 percent of rated thermal power at EPU conditions.
- 9. Implement the Harris Radio System for Closed - A communication system has communication between the MCR and the ROS. been implemented that uses hand held radios for communication between the main control room and the remote operating station. (DCN 70852)
Phase 2 Open Items
- 1. Perform an evaluation for the locations of the Open SAWA equipment and controls, as well as ingress and egress paths for the expected Severe Accident conditions (temperature, humidity, radiation) for the Sustained Operating period.
- 2. Perform an hydraulic evaluation to ensure flow Open adequacy can be met for all 3 units using 1 FLEX pump to support SAWA flow requirement Phase 1 Interim Staff Evaluation Open Item Status
- 1. Make available for NRC staff audit an evaluation Closed for Unit 1 - Evaluation of temperature and radiological conditions to performed and documented in ensure that operating personnel can safely Calculation MDQ0000642015000351, access and operate controls and support R1, HCVS Operator Mission Dose, equipment. and Calculation MDQ0009992014000291, R1, Temperature Response of the Reactor Building Following an Extended Loss of AC Power.
Calculation MDQ0009992014000291, R1, also evaluates the temperature response in the Diesel Building during an ELAP event. Evaluation is available for audit.
Unit 2 - In Progress Unit 3 - In Progress E-8 CNL-16-182
- 2. Make available for NRC audit documentation that Closed for Unit 1 EOI procedure 1/2/3-EOI Appendix 13 has been Appendix 13, R3 was revised to revised to include venting for loss of dc power. include venting for loss of DC power, and is available for audit.
Unit 2 - In Progress Unit 3 - In Progress
- 3. Make available for NRC staff audit documentation Closed (Reference 6) - Calculation demonstrating that all load sheds will be EDQ0009992013000202 R3, 250V DC accomplished within one hour of event initiation Unit Batteries, 1, 2, & 3 Evaluation for and will occur in an area not impacted by a the Beyond Design Basis External possible radiological event. Event (BDBEE) Extended Loss of AC Power (ELAP), has been issued to determine load shedding impact on the unit batteries, and is available for audit.
- 4. Make available for NRC staff audit documentation Closed (Reference 6) - A conceptual that demonstrates that operating units that have meeting was held in November 2014, not implemented the order will be able to vent and a staging plan was used to through the existing vent system unaffected by separate the existing HWWV from the the implementation of HCVS on other units. HCVS. Documentation is available for audit.
- 5. Make available for NRC staff audit analyses Closed (Reference 6) - The existing demonstrating that HCVS has the capacity to vent wetwell vent (CLTP) and the HCVS the steam/energy equivalent of one percent of (EPU) have been designed for 1 licensed/rated thermal power (unless a lower percent of rated thermal power at EPU value is justified), and that the suppression pool conditions. Analyses are available for and the HCVS together are able to absorb and audit.
reject decay heat, such that following a reactor shutdown from full power containment pressure is restored and then maintained below the primary containment design pressure and the primary containment pressure limit.
- 6. Make available for NRC staff audit documentation Closed - A communication system has that demonstrates adequate communication been implemented that uses hand held between the remote HCVS operation locations radios for communication between the and HCVS decision makers during ELAP and main control room and the remote severe accident conditions. operating station (DCN 70852).
Documentation is available for audit.
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- 7. Make available for NRC staff audit documentation Closed - An evaluation was performed of an evaluation verifying the existing containment and concluded that the containment isolation valves, relied upon for the HCVS, will isolation valves will open under the open under the maximum expected differential maximum expected differential pressure during BDBEE and severe accident pressure and is documented in wetwell venting. FLOWSERVE Report RAL-70181, Design Review Report of Size 14 Class 150 Wafer Butterfly Valve with Pneumatic Actuator R1.
Documentation is available for audit.
- 8. Make available for NRC staff audit documentation Closed for Unit 1 - All electrical of a seismic qualification evaluation of HCVS and I&C components were components. procured as seismically qualified or as Seismic Class I to ensure their functionality following a seismic event. Seismic qualification reports of HCVS components are available for audit.
Unit 2 - In Progress Unit 3 - In Progress
- 9. Make available for NRC staff audit descriptions of Closed for Unit 1 - Instrumentation all instrumentation and controls (existing and and controls necessary to planned) necessary to implement this order implement this order including including qualification methods.
equipment description, location, and qualifications are available for audit.
Unit 2 - In Progress Unit 3 - In Progress E-10 CNL-16-182
- 10. Make available for NRC staff audit the Closed for Unit 1 - Descriptions of descriptions of local conditions (temperature, local conditions (temperature, radiation and humidity) anticipated during ELAP radiation, and humidity) anticipated and severe accident for the components (valves, during ELAP and a severe accident instrumentation, sensors, transmitters, indicators, electronics, control devices, and etc.) required for for the components (valves, HCVS venting including confirmation that the instrumentation, sensors, components are capable of performing their transmitters, indicators, electronics, functions during ELAP and severe accident control devices, and etc.) required conditions. for HCVS venting including confirmation that the components are capable of performing their functions during ELAP and severe accident conditions are available for audit.
Unit 2 - In Progress Unit 3 - In Progress E-11 CNL-16-182
- 11. Make available for NRC staff audit the final sizing Closed for Unit 1 - HCVS evaluation for HCVS batteries/battery charger batteries/battery charger final sizing including incorporation into FLEX DG loading evaluation was performed and calculation.
documented in DCN 71389 Design Change Technical Evaluation. There is no incorporation of the HCVS battery/battery charger required for the FLEX DG loading calculation due to no plans or requirements to recharge the HCVS battery after depletion. The HCVS electrical loads will be aligned back to their normal power supply which is the Unit Battery. The recharging of the Unit Battery is incorporated into the FLEX DG loading Calculation EDQ0003602014000281 R3, Electrical Evaluation for Portable Power Supply for Unit Battery Chargers, and EDQ0003602015000325 R1, Electrical Evaluation for 4kV Spare FLEX Turbine Generators.
Evaluation is available for audit.
Unit 2 - In Progress Unit 3 - In Progress
- 12. Make available for NRC staff audit documentation Closed for Unit 1 - An evaluation of the HCVS nitrogen pneumatic system design was completed and documented in including sizing and location. Calculation MDQ0000322015000347 R1, HCVS Nitrogen System Sizing Analysis, and DCN 71389.
Documentation is available for audit.
Unit 2 - In Progress Unit 3 - In Progress E-12 CNL-16-182
- 13. Make available for NRC staff audit the seismic Closed for Unit 1 - Tornado and and tornado missile final design criteria for the seismic missile criteria are located HCVS stack. in System 64A Design Control Document (DCD). As part of DCN 71389 a markup reflecting these changes has been generated and will be incorporated in the next revision of the DCD per TVA process. Criteria is available for audit.
Unit 2 - In Progress Unit 3 - In Progress
- 14. Provide a description of the final design of the Closed for Unit 1 - The final design HCVS to address hydrogen detonation and of HCVS at BFN to address deflagration. hydrogen detonation and deflagration was the installation of a check valve near the vent discharge release point. A description of this design is contained in DCN 71389 Technical Evaluation.
Unit 2 - In Progress Unit 3 - In Progress E-13 CNL-16-182
- 15. Provide a description of the strategies for Closed for Unit 1 - The HCVS hydrogen control that minimizes the potential for provides a direct vent path from the hydrogen gas migration and ingress into the wetwell to an exhaust point above reactor building or other buildings. the Reactor Building Roof in accordance with NEI 13-02 section 4.1.5. This is a leak tight system with no boundary valves outside the primary containment isolation valve (PCIVs) that would allow hydrogen gas migration and ingress into the Reactor Building or other buildings. Per NEI 13-02 FAQ-04 an effluent release velocity of 8000 fpm will assure that the effluent plume will not be entrained into the roof recirculation zone of a given building. A description of this design is contained in DCN 71389 Technical Evaluation.
Unit 2 - In Progress Unit 3 - In Progress
- 16. Provide design details that minimize unintended Closed for Unit 1 - The BFN design cross flow of vented fluids within a unit and includes a separate HCVS stack for between units on the site. each unit as well as meeting the testing criteria and valve requirements for PCIVs, control and boundary valves. A description of this design is contained in DCN 71389 Technical Evaluation.
Unit 2 - In Progress Unit 3 - In Progress Phase 2 Interim Staff Evaluation Open Item Status TBD Awaiting NRC 7 Interim Staff Evaluation Impacts There are no potential impacts to the Interim Staff Evaluation(s) identified at this time.
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8 References The following references support the updates to the combined Phase 1 and 2 Overall Integrated Plan described in this enclosure.
- 1. Letter from TVA to NRC, Tennessee Valley Authoritys Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident (Order Number EA-13-109), dated June 30, 2014. (ML14181B169)
- 2. NRC Order Number EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 6, 2013. (ML13143A321)
- 3. NEI 13-02, Industry Guidance for Compliance with NRC Order EA-13-109, To Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 1, dated April 2015. (ML15113B318)
- 4. NRC Interim Staff Guidance JLD-ISG-2013-02, "Compliance with Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 0, dated November 2013. (ML13304B836).
- 5. NRC Endorsement of industry Hardened Containment Venting System (HCVS) Phase 1 Overall Integrated Plan Template (EA-13-109) Rev 0, dated May 14, 2014. (ML14128A219).
- 6. JLD-ISG-2012-01, Compliance with Order EA-12-049, Mitigation Strategies for Beyond-Design-Basis External Events, dated August 29, 2012. (ML12229A174)
- 7. Letter from TVA to NRC, Tennessee Valley Authority's Browns Ferry Nuclear Plant Third Six-Month Status Report and Phase 1 and Phase 2 Overall Integrated Plan in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109), dated December 29, 2015 (ML15365A554)
- 8. NRC Interim Staff Guidance JLD-ISG-2015-01, "Compliance with Phase 2 of Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 0, dated April 2015 (ML15104A118).
- 9. Letter from TVA to NRC Tennessee Valley Authoritys Browns Ferry Nuclear Plant Fourth Six-Month Status Report in Response to the June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109), dated June 30, 2016 (ML16182A517)
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