Letter Sequence Request |
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EPID:L-2020-LRO-0082, Technical Specification 5.6.6 Steam Generator Tube Inspection 180-Day Report (Approved, Closed) EPID:L2020, Termination of Special Nuclear Materials License Number SNM-2019 for the Ge-Hitachi Global Laser Enrichment Facility (Enterprise Project Identification Number: L-2020- DTP-0000) (Withdrawn, Closed) |
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MONTHYEARML20105A4602020-04-16016 April 2020 Letter, Individual Notice of Consideration of Issuance of Amendment to Renewed Facility Operating License, Proposed No Significant Hazards Consideration Determination, and Opportunity for a Hearing (Exigent Circumstances) Project stage: Other ML20128J9022020-05-0707 May 2020 Withdrawal of Proposed Alternatives to ASME OM Code 2012 Edition for the Fourth Inservice Test Interval (Relief Request PRR-02) Project stage: Withdrawal ML20282A5672020-08-25025 August 2020 GE-Hitachi Global Laser Enrichment LLC Revised Request for Termination of License No. SNM-2019, Docket No. 70-7016 Project stage: Request RS-20-110, Request to Use Provisions of a Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI2020-09-0202 September 2020 Request to Use Provisions of a Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI Project stage: Request L-20-132, Technical Specification 5.6.6 Steam Generator Tube Inspection 180-Day Report2020-09-15015 September 2020 Technical Specification 5.6.6 Steam Generator Tube Inspection 180-Day Report Project stage: Request ML20269A2002020-09-30030 September 2020 Request to Use a Provision of Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI (EPID L2020-LLR-0117 Project stage: Other ML20293A1742021-01-0505 January 2021 Termination of Special Nuclear Materials License Number SNM-2019 for the Ge-Hitachi Global Laser Enrichment Facility (Enterprise Project Identification Number: L-2020- DTP-0000) Project stage: Request ML21026A0482021-01-29029 January 2021 Announcement of Change in Authorizing Official Facility Clearance for the Global Laser Enrichment (Gle) Facility (Enterprise Project Identification Number: L2020-NEW-0007) Project stage: Other NOC-AE-21003784, Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing2021-03-0808 March 2021 Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing Project stage: Response to RAI ML21067A7722021-03-0808 March 2021 Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing Project stage: Response to RAI ML21130A2192021-05-10010 May 2021 Request for Additional Information Regarding Steam Generator Tube Inspection Reports (EPIDs L2020-LRO-0055, L-2020-LRO-0082, and L2020-LRO-0083) Project stage: Request ML21155A0392021-06-0808 June 2021 Review of the 2016, 2018, and 2020 Steam Generator Tube Inspection Reports (Epids L-2020-LRO-0055, L-2020-LRO-0082, and L-2020-LRO-0083) Project stage: Approval ML21281A0472021-08-10010 August 2021 Orano NCS Gmbh - Answers to Rsis for the Review of the DN30-X Package Project stage: Other ML21281A0482021-10-0808 October 2021 Orano NCS Gmbh - Application for Withholding Proprietary Information from Public Disclosure Project stage: Request ML22252A0372022-09-0909 September 2022 Orano NCS Gmbh - Answers to RAIs for the Review of the DN30-X Package Project stage: Other 2021-01-29
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Category:Letter
MONTHYEARIR 05000346/20243012024-02-0202 February 2024 NRC Initial License Examination Report 05000346/2024301 IR 05000346/20230042024-01-31031 January 2024 Integrated Inspection Report 05000346/2023004 ML23313A1352024-01-17017 January 2024 Authorization and Safety Evaluation for Alternative Request RP 5 for the Fifth 10 Year Interval Inservice Testing Program ML23353A1192023-12-19019 December 2023 Operator Licensing Examination Approval Davis Besse Nuclear Power Station, January 2024 L-23-260, Corrections to the 2022 Combined Annual Radiological Environmental Operating Report and Radioactive Effluent Release Report for the Davis-Besse Nuclear Power Station2023-12-0707 December 2023 Corrections to the 2022 Combined Annual Radiological Environmental Operating Report and Radioactive Effluent Release Report for the Davis-Besse Nuclear Power Station L-23-243, Independent Spent Fuel Storage Installation - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-12-0606 December 2023 Independent Spent Fuel Storage Installation - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23338A3172023-12-0606 December 2023 Notification of NRC Baseline Inspection and Request for Information; Inspection Report 05000346/2024001 IR 05000346/20234032023-11-0202 November 2023 Security Baseline Inspection Report 05000346/2023403 ML23293A0612023-11-0101 November 2023 Letter to the Honorable Marcy Kaptur, from Chair Hanson Responds to Letter Regarding Follow Up on Concerns Raised by Union Representatives During the June Visit to the Davis-Besse Nuclear Power Plant L-23-215, Changes to Emergency Plan2023-10-19019 October 2023 Changes to Emergency Plan ML23237B4222023-09-28028 September 2023 Energy Harbor Nuclear Corp. - Vistra Operations Company LLC - Letter Regarding Order Approving Transfer of Licenses and Draft Conforming License Amendments ML23269A1242023-09-27027 September 2023 Request for Withholding Information from Public Disclosure IR 05000346/20234012023-09-13013 September 2023 Security Baseline Inspection Report 05000346/2023401 (Public) L-23-205, Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-09-12012 September 2023 Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments L-23-172, Quality Assurance Program Manual2023-08-31031 August 2023 Quality Assurance Program Manual IR 05000346/20230112023-08-30030 August 2023 Biennial Problem Identification and Resolution Inspection Report 05000346/2023011 ML23129A1722023-08-25025 August 2023 Request for Withholding Information from Public Disclosure for Beaver Valley Power Station, Units 1 and 2; Davis Besse Nuclear Power Station, Unit 1; and Perry Nuclear Power Plant, Unit 1 IR 05000346/20230052023-08-24024 August 2023 Updated Inspection Plan for Davis-Besse Nuclear Power Station (Report 05000346/2023005) L-23-188, Energy Harbor Nuclear Corp., Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-08-0707 August 2023 Energy Harbor Nuclear Corp., Supplement to Application for Order Consenting to Transfer of Licenses and Conforming License Amendments IR 05000346/20230502023-08-0303 August 2023 Special Inspection Report 05000346/2023050 IR 05000346/20230902023-08-0101 August 2023 EA-23-002 Davis-Besse Nuclear Power Station - NRC Inspection Report No. 05000346/2023090 (Public) ML23178A2742023-08-0101 August 2023 Letter to the Honorable Marcy Kaptur from Chair Hanson Responds to Letter Regarding the License Transfer Application for the Davis-Besse Nuclear Power Station L-23-175, Submittal of Fifth Ten Year Inservice Testing Program2023-08-0101 August 2023 Submittal of Fifth Ten Year Inservice Testing Program IR 05000346/20230022023-07-27027 July 2023 Integrated Inspection Report 05000346/2023002 ML23193A7842023-07-13013 July 2023 Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000346/2023402 ML23178A2422023-06-28028 June 2023 Reassignment of the U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch III ML23160A2342023-06-13013 June 2023 Confirmation of Initial License Examination L-23-034, 2022 Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models2023-06-13013 June 2023 2022 Annual 10 CFR 50.46 Report of Changes to or Errors in Emergency Core Cooling System Evaluation Models IR 05000346/20235012023-06-13013 June 2023 Emergency Preparedness Biennial Exercise Inspection Report 05000346/2023501 L-23-135, Response to Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-05-31031 May 2023 Response to Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations L-23-065, Annual Financial Report2023-05-22022 May 2023 Annual Financial Report ML23124A1742023-05-17017 May 2023 Energy Harbor Fleet Vistra License Transfer - Request for Withholding Information from Public Disclosure for Commance Peak Plant, Units 1 & 2, Beaver Valley Station, Units 1 & 2, Davis Besse Station, Unit 1 and Perry Plant, Unit 1 ML23129A0112023-05-16016 May 2023 Notice of Consideration of Approval of Indirect and Direct License Transfer for Comanche Peak Plant, Units 1 & 2, Beaver Valley Station, Units 1 & 2, Davis Besse Station, Unit 1 and Perry Plant, Unit 1 (EPID L-2023-LLM-0000) (Letter) ML23131A2732023-05-15015 May 2023 Notification of NRC Supplemental Inspection 95001 and Request for Information L-23-101, Combined Annual Radiological Environmental Operating Report and Radioactive Effluent Release Report for the Davis-Besse Nuclear Power Station - 20222023-05-12012 May 2023 Combined Annual Radiological Environmental Operating Report and Radioactive Effluent Release Report for the Davis-Besse Nuclear Power Station - 2022 L-23-131, Readiness for Resumption of NRC Supplemental Inspection2023-05-12012 May 2023 Readiness for Resumption of NRC Supplemental Inspection IR 05000346/20230102023-05-0909 May 2023 Commercial Grade Dedication Inspection Report 05000346/2023010 ML23123A1272023-05-0303 May 2023 Information Request to Support Upcoming Problem Identification and Resolution Inspection at Davis-Besse Nuclear Power Station IR 05000346/20230012023-05-0101 May 2023 Integrated Inspection Report 05000346/2023001 and 07200014/2022001 L-23-092, Occupational Radiation Exposure Report for Year 20222023-04-27027 April 2023 Occupational Radiation Exposure Report for Year 2022 ML23111A1972023-04-26026 April 2023 Information Meeting with Question and Answer Session to Discuss NRC 2022 End-of-Cycle Plant Performance Assessment of Davis-Besse Nuclear Power Plant Station ML23114A1062023-04-25025 April 2023 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection CP-202300181, ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, ISFSI, Corrected Affidavit for Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-04-20020 April 2023 ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, ISFSI, Corrected Affidavit for Application for Order Consenting to Transfer of Licenses and Conforming License Amendments CP-202300157, ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, and ISFSI, Application for Order Consenting to Transfer of Licenses and Conforming License Amendments2023-04-14014 April 2023 ISFSI, Beaver Valley, Units 1 and 2, ISFSI, Davis-Besse, Unit 1, ISFSI, Perry, Unit 1, and ISFSI, Application for Order Consenting to Transfer of Licenses and Conforming License Amendments ML23096A1382023-04-11011 April 2023 Review of the Spring 2022 Steam Generator Tube Inspection Report L-23-061, Submittal of the Decommissioning Funding Status Reports2023-03-31031 March 2023 Submittal of the Decommissioning Funding Status Reports L-23-037, and Perry Nuclear Power Plant - Independent Spent Fuel Storage Installation Changes, Tests, and Experiments2023-03-29029 March 2023 and Perry Nuclear Power Plant - Independent Spent Fuel Storage Installation Changes, Tests, and Experiments L-23-066, Annual Notification of Property Insurance Coverage2023-03-21021 March 2023 Annual Notification of Property Insurance Coverage ML23066A2892023-03-14014 March 2023 Request for Threshold Determination Under 10 CFR 50.80 and 10 CFR 72.50 for an Amendment to the Voting Agreement ML23066A2592023-03-14014 March 2023 Request for Withholding Information from Public Disclosure for Beaver Valley Power Station, Units 1 and 2, Davis Besse Nuclear Power Station, Unit 1, and Perry Nuclear Power Plant, Unit 1 2024-02-02
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARL-23-048, Response to Request for Additional Information Regarding Technical Specification 5.6.6 Steam Generator Tube Inspection 180-Day Report2023-03-0101 March 2023 Response to Request for Additional Information Regarding Technical Specification 5.6.6 Steam Generator Tube Inspection 180-Day Report ML22292A0232022-10-18018 October 2022 Framatome Inc., Document ANP-2718-007Q1NP, Revision 0, Response to Request for Additional Information on Appendix G Pressure-Temperature Limits for 52 EFPY for Davis-Besse Nuclear Power Station - First Energy Nuclear Operating Company L-22-229, Response to Request for Additional Information Regarding Request to Withhold Information in Framatome Inc. Document ANP-2718P-007 from Public Disclosure & Affidavit2022-10-13013 October 2022 Response to Request for Additional Information Regarding Request to Withhold Information in Framatome Inc. Document ANP-2718P-007 from Public Disclosure & Affidavit L-22-152, Response to Request for Additional Information Regarding a License Amendment Request That Revises the Davis-Besse Nuclear Power Station Emergency Plan2022-07-0505 July 2022 Response to Request for Additional Information Regarding a License Amendment Request That Revises the Davis-Besse Nuclear Power Station Emergency Plan L-22-124, Response to Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building2022-05-12012 May 2022 Response to Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building L-22-059, Response to Request for Additional Information on Proposed Inservice Test Alternative RP-32022-03-21021 March 2022 Response to Request for Additional Information on Proposed Inservice Test Alternative RP-3 ML22081A1472022-03-11011 March 2022 R22 (March 2022) - Steam Generator Tube Inspection Discussion Points 11 March 2022 ML22049A0662022-02-10010 February 2022 Response to NRC Questions from 2/1/2022 Regulatory Conference on Failed Field Flash Selector Switch L-21-266, Response to Request for Additional Information on Proposed Inservice Inspection Alternative RR-A22022-01-27027 January 2022 Response to Request for Additional Information on Proposed Inservice Inspection Alternative RR-A2 ML21130A2192021-05-10010 May 2021 Request for Additional Information Regarding Steam Generator Tube Inspection Reports (EPIDs L2020-LRO-0055, L-2020-LRO-0082, and L2020-LRO-0083) ML21088A3442021-03-29029 March 2021 Final Supplemental Response to Nuclear Regulatory Commission Generic Letter 2004-02 L-21-101, Final Supplemental Response to Nuclear Regulatory Commission Generic Letter 2004-022021-03-29029 March 2021 Final Supplemental Response to Nuclear Regulatory Commission Generic Letter 2004-02 L-21-030, Response to Request for Additional Information Regarding an Amendment to Incorporate the Applicable Standard Technical Specification 5.2.2, Unit Staff, Into the Facility Technical Specifications (EPID L-20202021-01-27027 January 2021 Response to Request for Additional Information Regarding an Amendment to Incorporate the Applicable Standard Technical Specification 5.2.2, Unit Staff, Into the Facility Technical Specifications (EPID L-2020 L-20-313, Response to Request for Additional Information Regarding Request for Exemption -Part 73 Force-on-Force2020-12-0707 December 2020 Response to Request for Additional Information Regarding Request for Exemption -Part 73 Force-on-Force L-20-183, Response to Request for Additional Information Regarding License Amendment Request for Adoption of TSTF-425, Revision 3, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force2020-06-23023 June 2020 Response to Request for Additional Information Regarding License Amendment Request for Adoption of TSTF-425, Revision 3, Relocate Surveillance Frequencies to Licensee Control - Risk Informed Technical Specification Task Force L-20-155, Response to Request for Additional Information Regarding Request for Exemptions to Certain Periodic Training Requirements for Security Personnel (Epids L-2020-LLE-0026 to -0040)2020-05-0606 May 2020 Response to Request for Additional Information Regarding Request for Exemptions to Certain Periodic Training Requirements for Security Personnel (Epids L-2020-LLE-0026 to -0040) L-20-041, Response to Request for Additional Information Regarding License Amendment Request to Extend Containment Leakage Test Interval2020-02-0303 February 2020 Response to Request for Additional Information Regarding License Amendment Request to Extend Containment Leakage Test Interval L-19-182, Response to RAI Regarding an Application for Order Consenting to Transfer of License2019-08-0202 August 2019 Response to RAI Regarding an Application for Order Consenting to Transfer of License L-19-178, Response to Request for Additional Information Regarding Request for Approval of Decommissioning Quality Assurance Program for the Davis-Besse Nuclear Power Station2019-07-16016 July 2019 Response to Request for Additional Information Regarding Request for Approval of Decommissioning Quality Assurance Program for the Davis-Besse Nuclear Power Station L-19-166, Response to Request for Additional Information and Supplemental Information Regarding License Amendment Request for Proposed Post-Shutdown Emergency Plan2019-07-0808 July 2019 Response to Request for Additional Information and Supplemental Information Regarding License Amendment Request for Proposed Post-Shutdown Emergency Plan L-19-160, Response to Request for Additional Information Regarding License Amendment Request for Permanently Defueled Technical Specifications2019-06-26026 June 2019 Response to Request for Additional Information Regarding License Amendment Request for Permanently Defueled Technical Specifications L-18-121, Response to Request for Supplemental Information Regarding Generic Letter 2016-01 Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools.2018-05-25025 May 2018 Response to Request for Supplemental Information Regarding Generic Letter 2016-01 Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools. L-18-125, Response to Follow-up Request for Additional Information Regarding Exemption Request for a Physical Barrier Requirement IEPID-L-2017-l-LE-0019 (CAC Nos.000976/05000334/-L-2017-LLE-0019 MG0010, 000976/05000334/L-2017-LLE-0019 MG0011,000976/02018-05-0202 May 2018 Response to Follow-up Request for Additional Information Regarding Exemption Request for a Physical Barrier Requirement IEPID-L-2017-l-LE-0019 (CAC Nos.000976/05000334/-L-2017-LLE-0019 MG0010, 000976/05000334/L-2017-LLE-0019 MG0011,000976/0 L-18-085, Response to Request for Additional Information and Supplemental Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 8052018-04-0202 April 2018 Response to Request for Additional Information and Supplemental Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 L-18-061, Units. 1 & 2, Davis-Besse, and Perry, Response to Request for Additional Information Regarding Exemption Request for a Physical Barrier Requirement2018-03-16016 March 2018 Units. 1 & 2, Davis-Besse, and Perry, Response to Request for Additional Information Regarding Exemption Request for a Physical Barrier Requirement L-17-372, Response to Request for Additional Information Regarding Request to Use ASME Code Case N-513-4 (EPID 000976/05000334/L-2017-LLR-0088,000976/05000346/L-2017-LLR-0088, 000976/05000412/L-2017-LLR-0088, and 000976/05000440/L-2017-LLR-0088)2017-12-23023 December 2017 Response to Request for Additional Information Regarding Request to Use ASME Code Case N-513-4 (EPID 000976/05000334/L-2017-LLR-0088,000976/05000346/L-2017-LLR-0088, 000976/05000412/L-2017-LLR-0088, and 000976/05000440/L-2017-LLR-0088) L-17-253, Supplemental Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 8052017-10-0909 October 2017 Supplemental Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 L-17-233, High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information, Per 10CFR50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force (NTTF) Review of Insights from the Fukishima Dai-ichi Accident2017-08-0202 August 2017 High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information, Per 10CFR50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force (NTTF) Review of Insights from the Fukishima Dai-ichi Accident L-17-189, Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 8052017-06-16016 June 2017 Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 ML17163A4122017-06-0808 June 2017 Areva, ANP-3542Q1NP, Revision 0, Response to NRC Request for Additional Information on Time-Limited Aging Analysis for the DB-1 Reactor Vessel Internals. L-17-158, Reply to Request for Additional Information Re License Renewal Commitment No. 422017-05-12012 May 2017 Reply to Request for Additional Information Re License Renewal Commitment No. 42 L-17-070, Reply to Request for Additional Information Related to License Renewal Commitment2017-02-22022 February 2017 Reply to Request for Additional Information Related to License Renewal Commitment L-16-371, Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 8052017-01-17017 January 2017 Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 L-16-345, Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association Cnfpa) Standard 8052016-12-16016 December 2016 Response to Request for Additional Information Regarding License Amendment Request to Adopt National Fire Protection Association Cnfpa) Standard 805 L-16-323, Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to CFR 50.54(f) Regarding Recommendation 2.1 of the Near Term Task Force Review of Insights from Fukushima Dai-inchi Accident2016-12-0909 December 2016 Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to CFR 50.54(f) Regarding Recommendation 2.1 of the Near Term Task Force Review of Insights from Fukushima Dai-inchi Accident L-16-291, Response to Generic Letter 2016-01, Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools2016-11-0101 November 2016 Response to Generic Letter 2016-01, Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools L-16-279, Reply to Request for Additional Information Related to License Renewal Commitment 422016-09-26026 September 2016 Reply to Request for Additional Information Related to License Renewal Commitment 42 L-16-123, Completion of Required Action by NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2016-09-23023 September 2016 Completion of Required Action by NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events L-16-256, Response to Request for Additional Information Regarding a Request to Revise the Emergency Plan2016-09-0606 September 2016 Response to Request for Additional Information Regarding a Request to Revise the Emergency Plan L-16-220, Response to Regulatory Issue Summary 2016-09, Preparation and Scheduling of Operator Licensing Examinations.2016-07-20020 July 2016 Response to Regulatory Issue Summary 2016-09, Preparation and Scheduling of Operator Licensing Examinations. L-16-085, Request for Additional Information Response Related to Modification of Technical Specification 5.3.1, Unit Staff Qualifications.2016-03-22022 March 2016 Request for Additional Information Response Related to Modification of Technical Specification 5.3.1, Unit Staff Qualifications. L-16-079, Supplemental Information for License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 8052016-03-0707 March 2016 Supplemental Information for License Amendment Request to Adopt National Fire Protection Association (NFPA) Standard 805 L-16-040, Response to Request for Additional Information Regarding License Amendment Request to Revise Emergency Diesel Generator Minimum Voltage and Frequency Surveillance Requirements2016-02-19019 February 2016 Response to Request for Additional Information Regarding License Amendment Request to Revise Emergency Diesel Generator Minimum Voltage and Frequency Surveillance Requirements ML15299A1432015-10-19019 October 2015 Additional Information for the Advisory Committee on Reactor Safeaquards Review of the License Renewal Application, Including Enclosure a, Bechtel Affidavit L-15-268, Response to Request for Additional Information Regarding License Amendment Request to Revise Emergency Diesel Generator Minimum Voltage and Frequency Surveillance Requirements2015-10-14014 October 2015 Response to Request for Additional Information Regarding License Amendment Request to Revise Emergency Diesel Generator Minimum Voltage and Frequency Surveillance Requirements ML15280A2872015-10-0606 October 2015 Additional Information for the Advisory Committee on Reactor Safeguards Review of License Renewal Application L-15-263, Response to Request for Additional Information Related to Security Plan Changes2015-08-17017 August 2015 Response to Request for Additional Information Related to Security Plan Changes L-15-197, Response to Request for Additional Information Regarding a Request to Amend Technical Specification 5.5.15. Containment Leakage Rate Testing Program2015-06-26026 June 2015 Response to Request for Additional Information Regarding a Request to Amend Technical Specification 5.5.15. Containment Leakage Rate Testing Program 2023-03-01
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energy Energy Harbor Nuclear Corp.
harbor Davis-Besse Nuclear Power Station 5501 N. State Route 2 Oak Harbor, Ohio 43449 Terry J. Brown 419-321-7676 Site Vice President, Davis-Besse Nuclear May 10, 2021 L-21-118 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
Davis-Besse Nuclear Power Station, Unit No. 1 Docket No. 50-346, License No. NPF-3 Request for Additional Information Regarding Steam Generator Tube Inspection Reports (EPIDs L2020-LRO-0055. L-2020-LRO-0082. and L2020-LRO-0083)
By letters dated October 31, 2016, and August 21, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession Nos. ML16306A262 and ML18233A451, respectively), FirstEnergy Nuclear Operating Company submitted the reports for the steam generator (SG) tube inspections performed at Davis-Besse Nuclear Power Station, Unit No. 1 (Davis-Besse) during the spring 2016 refueling outage (1R19) and spring 2018 refueling outage (1 R20), respectively. By letter dated September 15, 2020 (ADAMS Accession No. ML20260H057), Energy Harbor Nuclear Corp. submitted the report for the SG tube inspection performed at Davis-Besse during the spring 2020 refueling outage (1 R21 ). The spring 2016 SG tube inspections were the first inspections following SG replacement at Davis-Besse in 2014.
Davis-Besse Technical Specification (TS) 5.5.8, "Steam Generator (SG) Program,"
provides specific requirements for the structural and leakage integrity, repair, and inspection of SG tubes. In addition, TS 5.6.6, "Steam Generator Tube Inspection Report," requires a report summarizing the results of each SG inspection to be submitted to the U.S. Nuclear Regulatory Commission (NRC). The NRC staff is currently reviewing the SG tube inspection reports for the spring 2016, 2018, and 2020 refueling outages at Davis-Besse and has determined that additional information is required to complete its review.
By electronic mail dated February 10, 2021 (ADAMS Accession No. ML21041A545),
the NRC staff issued a request for additional information to complete its review. The Energy Harbor Nuclear Corp. response is attached.
Davis-Besse Nuclear Power Station, Unit No. 1 L-21-118 Page 2 There are no regulatory commitments contained in this submittal. If there are any questions, or if additional information is required, please contact Mr. Phil H. Lashley, Manager - Fleet Licensing, at (330) 696-7208 .
Attachment Request for Additional Information Regarding Steam Generator Tube Inspection Reports cc: NRC Region Ill Administrator NRC Resident Inspector NRR Project Manager Utility Radiological Safety Board
Attachment L-21-118 Request for Additional Information Regarding Steam Generator Tube Inspection Reports Page 1 of 5 By letters dated October 31, 2016, and August 21, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession Nos. ML16306A262 and ML18233A451, respectively), FirstEnergy Nuclear Operating Company submitted the reports for the steam generator (SG) tube inspections performed at Davis-Besse Nuclear Power Station, Unit No. 1 (Davis-Besse) during the spring 2016 refueling outage (1R19) and spring 2018 refueling outage (1 R20), respectively. By letter dated September 15, 2020 (ADAMS Accession No. ML20260H057), Energy Harbor Nuclear Corp. submitted the report for the SG tube inspection performed at Davis-Besse during the spring 2020 refueling outage (1 R21 ). The spring 2016 SG tube inspections were the first inspections following SG replacement at Davis-Besse in 2014.
Davis-Besse Technical Specification (TS) 5.5.8, "Steam Generator (SG) Program,"
provides specific requirements for the structural and leakage integrity, repair, and inspection of SG tubes. In addition, TS 5.6.6, "Steam Generator Tube Inspection Report,"
requires a report summarizing the results of each SG inspection to be submitted to the U.S. Nuclear Regulatory Commission (NRC). The NRC staff is currently reviewing the SG tube inspection reports for the spring 2016, 2018, and 2020 refueling outages at Davis-Besse and has determined that additional information is required to complete its review.
By electronic mail dated February 10, 2021 (ADAMS Accession No. ML21041A545), the NRC staff issued a request for additional information to complete its review. The Energy Harbor Nuclear Corp. response is below.
Request for Additional Information
- 1. Provide the scope of the array probe and rotating-coil probe special interest inspections performed during 1R21.
The array probe special interest examinations were performed to either characterize selected bobbin probe indications of tube support plate (TSP) wear of tubes or to further characterize bobbin probe proximity indications. As provided by letter dated September 15, 2020 (ADAMS Accession No. ML20260H057), no rotating-coil probe special interest examinations were performed in 1R21.
- 2. Discuss the results of the channel head visual inspections performed on each SG in 1R21.
The general visual examination of all four channel heads was performed during 1R21 to address industry concerns with steam generator channel head and tubesheet degradation.
The results of these examinations were satisfactory; no degradation was identified.
Attachment L-21-118 Page 2 of 5
- 3. Provide the scope and results of any secondary side inspection and maintenance activities performed in each SG during 1R21.
The scope of the secondary side inspection included visual examinations performed from the tube bundle periphery of the first span, between the lower tubesheet and the first TSP, in selected locations of SG 2A. These examinations were performed to verify the suspected cause of the proximity indications observed during electromagnetic testing (ET) examinations. The results of the examination confirmed the existence of tie rod bowing conditions at the selected locations visually examined. There was no secondary side inspection in SG 1B during 1R21.
Secondary side maintenance activities performed during 1R21 included adjustment of the orifice plates in both SG 1B and SG 2A. The result of this maintenance was that the steam generator orifice plates were opened to reduce feedwater downcomer level during operation.
- 4. Sections 2 and 4 of the spring 2018 SG tube inspection report stated that one foreign object wear indication was found in SG 2A in Row 147, Tube 12, during 1R20. No tubes were plugged during 1R20 due to foreign object wear.
Discuss whether the foreign object was still present at the time of the inspection and if it was removed from the SG.
The foreign object was not present at the time of the inspection in 1R20. The small size and location of the indication below TSP 15S made classification difficult during 1R20, and as a result, the most conservative sizing quantification, associated with foreign object wear was used. However, Energy Harbor Nuclear Corp. concluded from the 1R21 examination results that the indication was not associated with foreign object wear and the indication was reclassified as tube wear at a drilled TSP location, as provided the 1R21 report dated September 15, 2020 (ADAMS Accession No. ML20260H057.)
- 5. Section 2 of each SG tube inspection report identifies the number of broached tube support plate (TSP) wear indications found during the associated refueling outage. This information is summarized in the table below.
Steam Broached TSP Wear Indications Generator 1R19 1R20 1R21 SG2A 627 1337 1912 SG1B 67 194 703
Attachment L-21-118 Page 3 of 5 During an April 12, 2016, teleconference {ADAMS Accession No. ML16130A750) with the NRC staff, the licensee stated that the higher number of wear-like indications in SG 2A were believed to be due to a different length of secondary side piping that runs into SG 2A and that similar differences had been seen with the previous SGs.
Provide any additional insights {e.g., location, wear rate) regarding the higher number of broached TSP wear indications in SG 2A. In addition, provide any insights {e.g., location, wear rate) regarding to the higher number of broached TSP wear indications in SG 1B in 1R21.
The location of broached TSP wear indications continues to be primarily in the periphery of the upper tube bundle in both steam generators. This is expected because of the high crossflow conditions in this region combined with reduced damping due to the superheated steam also present in this region. The upper 95th percentile growth rate of broached TSP wear indications has decreased in 1R21 compared with 1R20 in both steam generators. The higher number of reported broached TSP wear indications in SG 1B from 1R21 are nearly all attributable to very small (<15 percent through-wall) indications first being detected in 1R21.
- 6. Sections 1, 5, and 6 of each SG tube inspection report provides the number of previously installed tube plugs, the number of tubes plugged during the associated refueling outage, and the total number of tubes plugged in SG 2A.
However, there appears to be discrepancies in the numbers reported. This information is summarized in the table below.
Tubes Steam Refueling Previously Plugged Total Generator Outage Installed Tube During Plugged Plugs Refueling Tubes Outage SG2A 1R19 2 10 11 1R20 22 16 27 1R21 27 78 105 Confirm the total number of previously installed tube plugs and the total number of tubes plugged in SG2A for 1R19, 1R20, and 1R21.
The reporting method changed in the 1R21 report compared with previous 1R19 and 1R20 reports.
The 1R19 and 1R20 Section 1 reports indicate the tube plug examinations as one examination for each plug. With the tubes being plugged at both ends, this resulted in two
Attachment L-21-118 Page 4 of 5 examinations reported for each plugged tube. The two examinations reported in 1R19 were for 1 plugged tube. The 22 examinations reported in 1R20 were for 11 plugged tubes.
However, the Section 1 reporting from the 1R21 report only reported one examination for each plugged tube. In 1R21, both the examination of the hot leg plug and cold leg plug were recorded as one examination, as opposed to two examinations previously.
The 54 previously installed plugs, both hot leg and cold leg, were examined in 1R21. The results of all examinations were satisfactory. The revised table below shows the number of plugs inspected and the number of tubes plugged for each inspection for SG 2A for 1R19, 1R20, and 1R21.
Previous Tubes Steam Refueling Previously Number of Plugged Total Generator Outage Installed Plugged During Plugged Plugs Tubes Refueling Tubes Outage SG2A 1R19 2 1 10 11 1R20 22 11 16 27 1R21 54 27 78 105
- 7. A drilled TSP wear indication (22 percent through-wall) was reported in Row 142, Tube 1, of SG 2A for 1R20, but no tubes were plugged due to drilled TSP wear indications during 1R20. However, drilled TSP wear indications were only reported in Row 36, Tube 1, and Row 147, Tube 12, of SG 2A for 1R21.
Discuss if a reportable indication was detected in Row 142, Tube 1, of SG 2A during 1R21.
Row 142, Tube 1 of SG 2A was plugged in 1R20 due to a broached TSP wear indication at TSP 16S; therefore, the tube was no longer in service and unable to be examined in 1R21.
- 8. Section 6 of the spring 2020 SG tube inspection report states that 78 tubes in SG 2A and 66 tubes in SG 1B were plugged during 1R21. The report only noted that one tube in SG 2A was plugged due to broached TSP wear.
Confirm that proximity indications were the reason for plugging the additional tubes. Provide any additional insights regarding the tube proximity indications.
The additional 77 tubes in SG 2A and 66 tubes in SG 1B, which were plugged during 1R21, were preventatively plugged due to the observed proximity indications. As stated in
Attachment L-21-118 Page 5 of 5 response 3 above, selected locations with ET indications of tube proximity in SG 2A were examined visually from the secondary side. The results of the examination confirmed the suspected tie rod bowing conditions. The tie rod bowing condition observed in 1R21 was not associated with any tube-to-tie rod wear or tube-to-tube wear indications. Tube-to-tube wear and tube-to-tie rod wear have been considered potential degradation mechanisms and examinations have been performed to detect them. The proximity indications detected during the 1R21 examinations were discovered during the examinations performed to detect tube-to-tube wear and tube-to-tie rod wear.