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MONTHYEARML0429900092004-11-0404 November 2004 Safety Evaluation, Change the Licensing Basis for Tornado Mitigation Project stage: Approval ML0430801722004-11-0404 November 2004 Notice of Meeting with Duke Energy Corporation Options for Changing the Oconee Tornado Mitigation Strategy Project stage: Meeting ML0434501712004-12-0606 December 2004 Attachment 2, to 11/16/2004 Meeting Summary Regarding Tornado Mitigation Strategy Project stage: Meeting ML0433504792004-12-0606 December 2004 Meeting Summary with Oconee, Units 1, 2 & 3, to Discuss tornado-mitigation Strategy Project stage: Meeting ML0506003572005-03-0202 March 2005 Meeting with Duke Energy Corp Oconee Tornado Migration Strategy (Tac No. MC4608, MC4609, MC4610) Project stage: Meeting ML0525604392005-09-13013 September 2005 Notice of Meeting with Duke Energy Corporation to Discuss Proposed Oconee Tornado Mitigation Method Submittal Project stage: Meeting ML0527701472005-10-20020 October 2005 9/27/05 Meeting Summary with Duke Energy Corp. on Oconee Units 1, 2 and 3, Re Tornado Mitigation Method Project stage: Meeting ML0530102342005-10-31031 October 2005 Notice of Meeting with Duke Energy Corp, to Discuss Oconee Tornado Mitigation Project stage: Meeting ML0602402232006-01-24024 January 2006 Design-Basis Tornado (MC4608, MC4609, MC4610) Project stage: Other ML0605305002006-02-28028 February 2006 Y020040261 - Oconee, Units 1, 2 and 3, Letter, Request or Assistance Related to Staff Recommendation for a Site-Specific Backfit Regulatory Analysis Project stage: Other ML0617806392006-07-12012 July 2006 Ltr, Tornado and High Energy Line Break Mitigation Strategies Project stage: Other 2005-03-02
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Category:Letter
MONTHYEARML23304A1422024-02-0101 February 2024 Issuance of Environmental Scoping Summary Report Associated with the U.S. Nuclear Regulatory Commission Staffs Review of the Oconee Nuclear Station, Units 1, 2, & 3, Subsequent License Renewal Application ML24005A2492024-01-24024 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting) IR 05000269/20243012024-01-11011 January 2024 Notification of Licensed Operator Initial Examination 05000269/2024301, 05000270/2024301, and 05000287/2024301 ML23331A7982023-12-14014 December 2023 Review of the Fall 2022 Steam Generator Tube Inspection Report (01R32) ML23262A9672023-12-13013 December 2023 Alternative to Use RR-22-0174, Risk-Informed Categorization and Treatment for Repair/Replacement Activities in Class 2 and 3 Systems Section XI, Division 1 ML23317A3462023-11-14014 November 2023 Duke Fleet - Correction Letter to License Amendment Nos. 312 & 340 Issuance of Amendments Regarding the Adoption of Technical Specifications Task Force Traveler TSTF-554, Revision 1 IR 05000269/20230032023-11-14014 November 2023 Integrated Inspection Report 05000269/2023003, 05000270/2023003, and 05000287/2023003; and IR 07200040/2023001; and Exercise of Enforcement Discretion ML23219A1402023-10-10010 October 2023 Audit Report Proposed Alternative to Use ASME Code Case N-752, Risk Informed Categorization and Treatment for Repair/Replacement Activities in Class 2 and 3 Systems XI, Division 1 ML23269A1102023-10-0606 October 2023 Letter to Steven Snider-Revised Schedule for the Environmental Review of the Oconee Nuclear Station, Unit 1, 2, and 3, Subsequent License Renewal Application ML23256A0882023-09-25025 September 2023 Issuance of Alternative to Steam Generator Welds ML23195A0782023-08-29029 August 2023 Issuance of Amendments Regarding the Adoption of Technical Specifications Task Force Traveler TSTF-554, Revision 1 IR 05000269/20230112023-08-25025 August 2023 Comprehensive Engineering Team Inspection Report 05000269/2023011 and 05000270/2023011 and 05000287/2023011 IR 05000269/20230052023-08-25025 August 2023 Updated Inspection Plan for Oconee Nuclear Station Units 1, 2 and 3 (Report 05000269/2023005, 05000270/2023005, and 05000287/2023005) IR 05000269/20230022023-07-28028 July 2023 Integrated Inspection Report 05000269/2023002, 05000270/2023002 and 05000287/2023002 ML23208A0972023-07-27027 July 2023 Subsequent License Renewal List of Threatened and Endangered Species That May Occur in Your Proposed Project Location or May Be Affected IR 05000269/20230102023-07-19019 July 2023 Biennial Problem Identification and Resolution Inspection Report 05000269/2023010 and 05000270/2023010 and 05000287/2023010 and Notice of Violation ML23178A0682023-07-0303 July 2023 Audit Plan Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and Treatment for Repair/Replacement Activities in Class 2 & 3 Systems Section XI, Division 1 ML23132A2392023-06-0101 June 2023 Summary of the April 2023 Remote Environmental Audit Related to the Review of the Subsequent License Renewal Application ML23144A0192023-05-25025 May 2023 Review of the Spring 2022 Steam Generator Tube Inspection Report (O3R31) IR 05000269/20230012023-05-12012 May 2023 Integrated Inspection Report 05000269/2023001 and 05000270/2023001 and 05000287/2023001 ML23121A0552023-05-0303 May 2023 Acknowledgement of Withdrawal Request to Revise TS 5.5.2 Containment Leakage Rate Testing Program ML23118A0762023-05-0101 May 2023 Approval for Use of Specific Provision of a Later Edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI ML23117A0432023-04-20020 April 2023 Framatome, Inc., Part 21 Notification of Existence of a Defect ML23075A0732023-04-0505 April 2023 License Renewal Regulatory Audit Regarding the Environmental Review of the Subsequent License Renewal Application Supplement (EPID Number L-2021-SLE-0002) ML23045A1332023-03-15015 March 2023 Request for Scoping Comments Concerning the Supplemental Environmental Review of Oconee Nuclear Station, Units 1, 2, and 3, Subsequent License Renewal Application - Achp Letter ML23045A1402023-03-15015 March 2023 Request for Scoping Comments Concerning the Supplemental Environmental Review of Oconee Nuclear Station, Units 1, 2, and 3, Subsequent License Renewal Application - Shpo Letter ML23045A1432023-03-15015 March 2023 Request for Scoping Comments Concerning the Supplemental Environmental Review of Oconee Nuclear Station, Units 1, 2, and 3, Subsequent License Renewal Application - State Tribe Letter ML22332A4932023-03-10010 March 2023 William States Lee III 1 and 2 - Issuance of Amendments Regarding the Relocation of the Emergency Operations Facility ML23069A1102023-03-10010 March 2023 Notification of Inspection and Request for Information for NRC Problem Identification and Resolution Inspection ML23061A1772023-03-0303 March 2023 Notification of Oconee Nuclear Station Comprehensive Engineering Team Inspection - NRC Inspection Report 05000269/2023011, 05000270/2023011 and 05000287/2023011 IR 05000269/20220062023-03-0101 March 2023 Annual Assessment Letter for Oconee Nuclear Nuclear Station, Units 1, 2 and 3 (NRC Inspection Report 05000269/2022006, 05000270/2022006, and 05000287/2022006) ML23039A1632023-02-0808 February 2023 Requalification Program Inspection ML23037A0772023-02-0606 February 2023 402 Cyber Notification and RFI Letter Final IR 05000269/20220042023-02-0202 February 2023 Integrated Inspection Report 05000269 2022004 and 05000270/2022004 and 05000287/2022004 ML22363A3942023-01-12012 January 2023 Subsequent License Renewal Environmental Report Supplement - Proposed Review Schedule ML22356A0512022-12-14014 December 2022 Curtiss-Wright Nuclear Division, Letter Regarding Potential Efect in a Configuration of the 11/2 Inch Quick Disconnect Connector Cable Assemblies Supplied to Duke Energy (See Attached Spreadsheet) for a Total of 460 of Connectors Only Suppl ML22321A0492022-12-0808 December 2022 Issuance of Amendment Nos. 426, 428 and 427, Additional Mode Change Limitations Applicable to the Adoption of TSTF- 359, Revision 9, Increase Flexibility in Mode Restraints ML22329A1042022-11-29029 November 2022 Review of the Fall 2021 Steam Generator Tube Inspection Report ML22321A1582022-11-22022 November 2022 Summary of Conference Call Regarding the Fall 2022 Steam Generator Tube Inspections ML22096A0032022-11-18018 November 2022 McGuire Nuclear Station and Shearon Harris Nuclear Power Plant Authorization of RA-19-0352 Regarding Use of Alternative for RPV Head Closure Stud Examinations ML22256A2532022-11-14014 November 2022 Issuance of Amendments Regarding the Adoption of Technical Specifications Task Force Traveler TSTF-541, Rev. 2 IR 05000269/20220032022-11-0707 November 2022 Integrated Inspection Station 05000269/2022003 and 05000270/2022003 and 05000287/2022003 ML22301A0112022-11-0303 November 2022 Request for Withholding Information from Public Disclosure Regarding the SLR Application - September 2, 2022 ML22298A0752022-10-27027 October 2022 Request for Withholding Information from Public Disclosure Regarding the Subsequent License Renewal Application Duke Energy Letter Dated July 25, 2022 ML22264A0322022-10-20020 October 2022 _Request for Withholding Information from Public Disclosure Regarding the Subsequent License Renewal Application - Duke Energy Letter Dated July 8, 2022 IR 05000269/20220112022-09-26026 September 2022 NRC Inspection Report 05000269/2022011 and 05000270/2022011 and 05000287/2022011 ML22258A0302022-09-15015 September 2022 Evacuation Time Estimate Reports ML22222A0072022-09-14014 September 2022 Request for Withholding Information from Public Disclosure Regarding the Subsequent License Renewal Application ML22231B1362022-09-0101 September 2022 Review of the Draft Environmental Assessment and Findings of No Significant Impact for Catawba Nuclear Station, H.B. Robinson Steam Electric Plant, and Oconee Nuclear Station Independent Spent Fuel Storage Installation Decommissioning Fundi ML22234A0062022-08-30030 August 2022 SLRA - Closed Public Meeting Summary - August 18, 2022 2024-02-01
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January 24, 2006 Mr. Bruce H. Hamilton, Vice President Oconee Nuclear Station Duke Energy Corporation 7800 Rochester Highway Seneca, South Carolina 29672
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 - DESIGN-BASIS TORNADO (MC4608, MC4609, AND MC4610)
Dear Mr. Hamilton:
By letter dated December 21, 2005, you proposed a new design-basis tornado for certain systems, structures, and components (SSC) at Oconee Nuclear Station, Units 1, 2, and 3. This proposal would not affect the 300 miles per hour (mph) wind velocity, 3 pounds per square inch (psi) differential pressure, and the tornado-generated missile requirements that are currently defined in the Oconee Updated Final Safety Analysis Report for Class I structures. For the non-Class I structures, you proposed a change to the criterion of 1E-7 per year for tornado strike probability that is contained in the Standard Review Plan and serves as a basis for Regulatory Guide (RG) 1.76, Design Basis Tornado for Nuclear Power Plants. You proposed to change this criterion to 1E-6 per year for the Oconee design-basis tornado using the methodology of RG 1.174, An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis. Your letter also proposed the use of TORMIS methodology to evaluate tornado-generated missiles.
During a conference call on January 17, 2006, we informed you that RG 1.174 is appropriate for justifying changes to the licensing basis, not changes to the design basis; therefore, your use of RG 1.174 to justify a change in the design basis is not acceptable. However, we stated that the use of TORMIS may be found acceptable for evaluating tornado-generated missiles for certain SSC in isolated cases. In addition, we informed you that a draft RG, Draft Regulatory Guide DG-1143, Design-Basis Tornado and Tornado Missiles for Nuclear Power Plants, is being prepared and will be available for public comment in the near future. This draft RG provides guidance for selecting the design-basis tornado and design-basis tornado-generated missiles that a nuclear power plant should be designed to withstand. We stated that this draft RG uses the same methodology described in NUREG/CR-4461, Rev. 1, Tornado Climatology of the Contiguous United States. This methodology could be used to justify a particular design-basis tornado wind speed based on the actual location of your plant.
The Oconee Nuclear Station is located in Region I in DG-1143 where the default design-basis tornado characteristics include a maximum wind speed of 300 mph, a pressure drop of 2.0 psi, and a rate of pressure drop of 1.2 psi per second (sec). The design-basis tornado-generated missile spectrum for Region I includes a 15-foot long, 6-inch diameter schedule 40 pipe with a horizontal velocity of 155 ft/sec, a 4000-pound automobile with a horizontal velocity of 170 ft/sec, and a 1-inch diameter solid steel sphere with a horizontal velocity of 134 ft/sec. These missiles should be capable of striking in all directions with vertical velocities equal to 67 percent of their horizontal velocities. Barrier design should be evaluated assuming impact normal to the surface for the schedule 40 pipe and automobile missile.
B. H. Hamilton DG-1143 also presents design-basis tornado and tornado-generated missile criteria for two other regions within the contiguous United States. The design-basis tornado wind speed for Region II is 260 mph, and the corresponding design-basis tornado-generated missile spectrum includes a 15-foot long, 6-inch diameter schedule 40 pipe with a horizontal velocity of 123 ft/sec, a 4000-pound automobile with a horizontal velocity of 149 ft/sec, and a 1-inch diameter solid steel sphere with a horizontal velocity of 68 ft/sec. The design-basis tornado wind speed for Region III is 200 mph, and the corresponding design-basis tornado-generated missile spectrum includes a 15-foot long, 6-inch diameter schedule 40 pipe with a horizontal velocity of 27 ft/sec, a 4000-pound automobile with a horizontal velocity of 113 ft/sec, and a 1-inch diameter solid steel sphere with a horizontal velocity of 23 ft/sec.
The design-basis tornado wind speeds presented in DG-1143 are such that the best estimate of the exceedance frequency is 1E-7 per year. As with any regulatory guide, if a design-basis tornado proposed for a given site is characterized by less-conservative parameter values, a comprehensive analysis should be provided to justify the selection of the less-conservative design-basis tornado.
We trust that this letter and the January 17, 2006, conference call will be useful in the preparation of your letter, due January 31, 2006, that will provide commitments on tornado-related plant modifications. If you have any further questions on this matter, please contact me at 301-415-1419.
Sincerely,
/RA/
Leonard N. Olshan, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287 cc w/encl: See next page
ML060240223 NRR-106 OFFICE LPBII-1/PM LPBII-1 BC NAME LOlshan EMarinos DATE 1/24/06 1/24/06 Oconee Nuclear Station, Units 1, 2, and 3 cc:
Ms. Lisa F. Vaughn Mr. R. L. Gill, Jr.
Duke Energy Corporation Manager - Nuclear Regulatory 526 South Church Street Issues and Industry Affairs P. O. Box 1006 Duke Energy Corporation Mail Code = EC07H 526 S. Church St.
Charlotte, North Carolina 28201-1006 Mail Stop EC05P Charlotte, NC 28202 Manager, LIS NUS Corporation Division of Radiation Protection 2650 McCormick Dr., 3rd Floor NC Dept of Environment, Health, & Natural Clearwater, FL 34619-1035 Resources 3825 Barrett Dr.
Senior Resident Inspector Raleigh, NC 27609-7721 U.S. Nuclear Regulatory Commission 7812B Rochester Highway Mr. Peter R. Harden, IV Seneca, SC 29672 VP-Customer Relations and Sales Westinghouse Electric Company Mr. Henry Porter, Director 6000 Fairview Road Division of Radioactive Waste Management 12th Floor Bureau of Land and Waste Management Charlotte, NC 28210 Dept. of Health and Env. Control 2600 Bull St. Mr. Henry Barron Columbia, SC 29201-1708 Group Vice President, Nuclear Generation and Chief Nuclear Officer Mr. Michael A. Schoppman P.O. Box 1006-EC07H Framatome ANP Charlotte, NC 28201-1006 1911 North Ft. Myer Dr.
Suite 705 Rosslyn, VA 22209 Mr. B. G. Davenport Regulatory Compliance Manager Oconee Nuclear Site Duke Energy Corporation ON03RC 7800 Rochester Highway Seneca, SC 29672 Ms. Karen E. Long Assistant Attorney General NC Department of Justice P.O. Box 629 Raleigh, NC 27602