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MONTHYEARML0422504172004-08-11011 August 2004 RAI, Relief Request 04-GO-002 Project stage: RAI ML0425305622004-09-0101 September 2004 Response to Request for Additional Information Relief Request 04-GO-002 Project stage: Response to RAI ML0427503262004-09-16016 September 2004 Units I & 2, Response to Request for Additional Information on Relief Request 04-GO-002 Project stage: Response to RAI ML0428106012004-10-20020 October 2004 Relief Request, Alternate to the American Society of Mechanical Engineers Section XI for Reactor Vessel Examinations RR-04-GO-001 Project stage: Other 2004-08-11
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Category:Code Relief or Alternative
MONTHYEARML23256A0882023-09-25025 September 2023 Issuance of Alternative to Steam Generator Welds ML23230A0652023-08-31031 August 2023 William B. McGuire Nuclear Station, Units 1 and 2 - Relief Request Use of Later Edition of ASME Code ML23159A2712023-06-20020 June 2023 William B. McGuire Nuclear Station, Unit 1 - Relief Request Impractical Reactor System Welds ML23151A3482023-05-30030 May 2023 Duke Fleet - Request for Additional Information Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1) 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 RA-22-0257, Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1)2023-02-17017 February 2023 Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1) 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 ML22266A0782022-09-26026 September 2022 William B. Mcguire Nuclear Station, Unit 2 Pressurizer Power Operated Relief Valve Relief Request ML22213A2532022-08-31031 August 2022 Authorization and Safety Evaluation for Alternative Request RA-21-0144 to Use Reactor Vessel Head Penetration Embedded Flaw Repair Method ML22242A1602022-08-30030 August 2022 Hardship Relief Request Pilot-Operated Relief Valve Acceptance Review Results ML22046A2802022-02-23023 February 2022 Relief from ASME Code Paragraph ISTP-3540(b) Related to High Pressure Injection Pumps Vibration Measurements ML22046A2452022-02-18018 February 2022 Regarding Alternative to Implement Code Case OMN-22, Smooth Running Pumps ML22028A3652022-02-0707 February 2022 Authorization and Safety Evaluation for Alternative Acceptance Criteria for Code Case N-853 ML22007A3452022-01-11011 January 2022 Proposed Alternative to Use the American Society of Mechanical Engineers Boiler and Pressure Vessel Code Case N-885 ML21306A1592021-11-16016 November 2021 Request to Use Provisions of Later Edition and Addenda of the ASME Code, Section XI (EPID; L-2021-LLR-0048) ML21029A3352021-02-16016 February 2021 Request to Use a Provision of a Later Edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI ML20230A2052020-08-21021 August 2020 Relief Request RA-20-0031, Delay to Update the Code of Record for Inservice Inspection RA-20-0036, Request for Alternative to Defect Removal Prior to Performing Repair/Replacement Activities on Low Pressure Service Water (LPSW) System Piping2020-03-0202 March 2020 Request for Alternative to Defect Removal Prior to Performing Repair/Replacement Activities on Low Pressure Service Water (LPSW) System Piping ML20042D7142020-02-13013 February 2020 Relief Request 19-ON-002 for Proposed Alternative to Reactor Vessel Nozzle Weld Examination Frequency Requirements in ASME Code Case N-770-2 ML19217A3242019-08-14014 August 2019 Relief Request MC-SRV-NC-03, Alternate Testing for Pressurizer Power Operated Relief Valve Block Valve 2NC-35B RA-19-0028, Submittal of Relief Request (19-ON-001) to Utilize Code Case N-853, PWR Class 1 Primary Piping Alloy 600 Full Penetration Branch Connection Weld Metal Buildup for Material Susceptible to Primary Water Stress2019-03-21021 March 2019 Submittal of Relief Request (19-ON-001) to Utilize Code Case N-853, PWR Class 1 Primary Piping Alloy 600 Full Penetration Branch Connection Weld Metal Buildup for Material Susceptible to Primary Water Stress RA-19-0026, Response to Request for Additional Information (RAI) Regarding Proposed Alternative to the Depth Sizing Qualification Requirement of Appendix Viii, Supplements 2 and 10 (18-GO-001)2019-02-11011 February 2019 Response to Request for Additional Information (RAI) Regarding Proposed Alternative to the Depth Sizing Qualification Requirement of Appendix Viii, Supplements 2 and 10 (18-GO-001) RA-18-0180, Supplement to Relief Request for an Alternative to the Depth Sizing Qualification Requirement of Appendix Viii, Supplements 22018-11-12012 November 2018 Supplement to Relief Request for an Alternative to the Depth Sizing Qualification Requirement of Appendix Viii, Supplements 2 ML18016A1782018-01-24024 January 2018 Request for Relief No. 17-CN-001, Regarding Category B-J Pressure Retaining Welds for the Third 10-Year Inservice Testing Interval (CAC Nos. MF9807 and MF9808; EPID L-2017-LLA-0032) ML17331A0862017-12-26026 December 2017 Alternative to Inservice Inspection Regarding Reactor Pressure Vessel Threads ML17104A1102017-04-26026 April 2017 Relief Request CN Grr 01, Alternative to the Testing Frequencies in the American Society of Mechanical Engineers Operation and Maintenance Code, by Adoption of Code Case OMN-20, Inservice Test Frequencies (CAC Nos. MF9595-6) CNS-17-020, Application to Adopt ASME Code Case OMN-20 (CN-GRR-01) for Pump and Valve Inservice Testing2017-04-11011 April 2017 Application to Adopt ASME Code Case OMN-20 (CN-GRR-01) for Pump and Valve Inservice Testing ML17034A3622017-02-22022 February 2017 Mcguire Nuclear Station, Unit 1 - Request 16-MN-002, Alternative to Defect Removal Prior to Performing Repair Activities on Nuclear Service Water System Piping Relief ML16358A6962017-01-17017 January 2017 Proposed Relief Request MC-SRV-NC-02, Alternate Testing for Pressurizer Power Operated Relief Valve (Porv) Block Valve 2NC-31B ML16266A0262016-10-18018 October 2016 Proposed Relief Request Serial No. 16-MN-003 for Alternate Repair of Nuclear Service Water Piping ML16294A2542016-10-13013 October 2016 Response to Request for Additional Information Regarding Relief Request 16-MN-002, Alternative to Defect Removal Prior to Performing Repair Activities on Nuclear Service Water System Piping ML16225A6542016-08-11011 August 2016 Email - McGuire Unit No. 1: Acceptance REVIEW- Relief Request 16-MN-003 Alternative to Defect Removal Prior to Performing Temporary Repair Activities on Three-Inch-Diameter Nuclear Service Water System Piping. MNS-16-062, Relief Request 16-MN-003 Alternative to Defect Removal Prior to Performing Temporary Repair Activities on Three-Inch-Diameter Nuclear Service Water System Piping2016-08-10010 August 2016 Relief Request 16-MN-003 Alternative to Defect Removal Prior to Performing Temporary Repair Activities on Three-Inch-Diameter Nuclear Service Water System Piping ML16210A0382016-07-28028 July 2016 Draft Relief Request Serial No. 16-MN-003 MNS-16-053, Relief Request 16-MN-002, Alternative to Defect Removal Prior to Performing Repair Activities on Nuclear Service Water System Piping2016-06-23023 June 2016 Relief Request 16-MN-002, Alternative to Defect Removal Prior to Performing Repair Activities on Nuclear Service Water System Piping ML16152A6012016-06-0808 June 2016 Withdrawal of Relief Request ML16118A2302016-04-30030 April 2016 Relief Request 14-ON-022 Alternative Requirements for Class 2 Residual Heat Removal Heat Exchange Welds ML16053A5012016-03-0101 March 2016 Relief Request ON-GRR-01 Grace Period for OM Code Frequencies (CAC Nos. MF7130, MF7131, and MF7132) ML16004A1812016-01-0707 January 2016 Relief Request 14-ON-003 Alternative Requirements for Class 1 Category B-J Piping Welds ML16004A2622016-01-0707 January 2016 Relief Request 15-ON-004: Limited Visual Examinations of the Reactor Pressure Vessel Support Skirt for the Fourth 10-Year Inservice Inspection Interval Program ML15349A4532015-12-29029 December 2015 Relief Request 15-ON-001 Repair of Low Pressure Service Water System Piping ML15301A5442015-11-10010 November 2015 Proposed Relief Request 15-CN-001, Alternative Repair of a Main Steam System Braided Flex-Hose ML15232A5432015-08-27027 August 2015 Proposed Relief Request 15-MN-001 CNS-15-062, Relief Request Serial Number 15-CN-001, Proposed Alternative Repair for Main Steam System Braided Flex-Hose - Submitted Pursuant to 10 CFR 50.55a(z)(2)2015-07-16016 July 2015 Relief Request Serial Number 15-CN-001, Proposed Alternative Repair for Main Steam System Braided Flex-Hose - Submitted Pursuant to 10 CFR 50.55a(z)(2) ONS-2015-087, Fourth Ten-Year Inservice Inspection Plan, Relief Request No. 15-ON-003, Limited Volume Inspections from 3EOC27 Outage2015-07-15015 July 2015 Fourth Ten-Year Inservice Inspection Plan, Relief Request No. 15-ON-003, Limited Volume Inspections from 3EOC27 Outage ONS-2015-088, Fourth Ten-Year Inservice Inspection Plan, Relief Request No. 15-ON-004, Limited Visual Examinations from 1 EOC27, 2EOC26 and 3EOC27 Outages2015-07-15015 July 2015 Fourth Ten-Year Inservice Inspection Plan, Relief Request No. 15-ON-004, Limited Visual Examinations from 1 EOC27, 2EOC26 and 3EOC27 Outages ML15161A3762015-06-19019 June 2015 Proposed Relief Request 14-CN-002, Alternative to American Society of Mechanical Engineers (ASME) Section XI Requirements for Class 3 Buried Piping ML15124A6992015-05-0808 May 2015 (Catawba 1 and 2) - Request to Use a Later Edition of the ASME Boiler and Pressure Vessel Code, Section X1, for Inservice Inspection Activities ML14295A5322014-10-30030 October 2014 Proposed Relief Request 14-CN-001, American Society of Mechanical Engineers (ASME) Section IX Volumetric Examination Requirements ML14188C3482014-07-14014 July 2014 Proposed Relief Request 13-MN-002 2023-09-25
[Table view] Category:Letter
MONTHYEARIR 05000413/20230042024-02-0202 February 2024 Integrated Inspection Report 05000413-2023004 and 05000414-2023004 ML23304A1422024-02-0101 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 IR 05000369/20230042024-01-31031 January 2024 Integrated Inspection Report 05000369/2023004 and 05000370/2023004 ML24005A2512024-01-26026 January 2024 Exemption from Select Requirements of 10 CFR Part 73 - Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting ML24019A1392024-01-25025 January 2024 TSTF 505 and 50.69 Audit Summary ML24019A2002024-01-24024 January 2024 Notification of Inspection and Request for Information for NRC Problem Identification and Resolution Inspection 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) IR 05000369/20234022023-12-14014 December 2023 Material Control and Accounting Program Inspection Report 05000369/2023402 and 05000370/2023402 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 ML23317A2272023-11-17017 November 2023 William B. McGuire Nuclear Station, Units 1 and 2 - Transmittal of Dam Inspection Report - Non-Proprietary 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 IR 05000369/20230032023-10-24024 October 2023 Integrated Inspection Report 05000369/2023003 and 05000370/2023003; and Inspection Report 07200038/2023001 IR 05000369/20240102023-10-13013 October 2023 Notification of McGuire Nuclear Station Comprehensive Engineering Team Inspection U.S. Nuclear Regulatory Commission Inspection Report 05000369, 370/2024010 IR 05000369/20230102023-10-13013 October 2023 Age Related Degradation Inspection Report 05000369/2023010 and 05000370/2023010 IR 05000413/20230102023-10-11011 October 2023 NRC Inspection Report 05000413/2023010 and 05000414/2023010 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 IR 05000369/20233012023-09-20020 September 2023 William B. McGuire Nuclear Station - NRC Examination Report 05000369/2023301 and 05000370/2023301 ML23230A0652023-08-31031 August 2023 William B. McGuire Nuclear Station, Units 1 and 2 - Relief Request Use of Later Edition of ASME Code ML23195A0782023-08-29029 August 2023 Issuance of Amendments Regarding the Adoption of Technical Specifications Task Force Traveler TSTF-554, Revision 1 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 05000269/20230112023-08-25025 August 2023 Comprehensive Engineering Team Inspection Report 05000269/2023011 and 05000270/2023011 and 05000287/2023011 IR 05000413/20230052023-08-25025 August 2023 Updated Inspection Plan for Catawba Nuclear Station Units 1 and 2 (Report 05000413/2023005 and 05000414/2023005) IR 05000369/20230052023-08-25025 August 2023 Updated Inspection Plan for McGuire Nuclear Station Units 1 and 2 (Report 05000369/2023005 and 05000370/2023005) ML23233A1692023-08-17017 August 2023 EN 56683 - Curtiss Wright, Interim Notification Report for PotentialPurt2l IR 05000369/20230022023-07-28028 July 2023 Integrated Inspection Report 05000369/2023002 and 05000370/2023002 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 05000413/20230022023-07-25025 July 2023 Integrated Inspection Report 05000413/2023002 and 05000414/2023002 IR 05000369/20234202023-07-24024 July 2023 Security Baseline Inspection Report 050003692023420 and 050003702023420 ML23206A0092023-07-24024 July 2023 William B. McGuire Nuclear Station Operator Licensing Written Examination Approval 05000369/2023301 and 05000370/2023301 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 ML23207A0762023-07-14014 July 2023 EN 56557 - Update to Part 21 Report Re Potential Defect with Trane External Auto/Stop Emergency Stop Relay Card Pn: XI2650728-06 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 ML23159A2712023-06-20020 June 2023 William B. McGuire Nuclear Station, Unit 1 - Relief Request Impractical Reactor System Welds ML23237A2672023-06-13013 June 2023 June 13, 2002 - Meeting Announcement - McGuire and Catawba Nuclear Stations 50-369, 50-370 and 50-413, 50-414 ML23159A0052023-06-0505 June 2023 56557-EN 56557 - Paragon - Redlined 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 IR 05000413/20230012023-05-0505 May 2023 Integrated Inspection Report 05000413/2023001 and 05000414/2023001 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 ML23115A2122023-05-0101 May 2023 Review of the Spring 2022 Steam Generator Tube Inspection Report IR 05000369/20230012023-05-0101 May 2023 Integrated Inspection Report 05000369/2023001 and 05000370/2023001 IR 05000413/20230112023-04-25025 April 2023 Focused Engineering Inspection Report 05000413/2023011 and 05000414/2023011 2024-02-02
[Table view] Category:Safety Evaluation
MONTHYEARML23262A9672023-12-13013 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 ML23256A0882023-09-25025 September 2023 Issuance of Alternative to Steam Generator Welds ML23230A0652023-08-31031 August 2023 William B. McGuire Nuclear Station, Units 1 and 2 - Relief Request Use of Later Edition of ASME Code ML23195A0782023-08-29029 August 2023 Issuance of Amendments Regarding the Adoption of Technical Specifications Task Force Traveler TSTF-554, Revision 1 ML23159A2712023-06-20020 June 2023 William B. McGuire Nuclear Station, Unit 1 - Relief Request Impractical Reactor System Welds 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 ML22332A4932023-03-10010 March 2023 William States Lee III 1 and 2 - Issuance of Amendments Regarding the Relocation of the Emergency Operations Facility ML22349A1452022-12-19019 December 2022 Non-Proprietary Safety Evaluation Related to the SLRA of Oconee Nuclear Station, Units 1, 2, and 3 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 ML22290A1012022-11-29029 November 2022 Issuance of Amendment Nos. 326 and 305, Regarding Changes to Technical Specification 3.4.3, Reactor Coolant System Pressure Temperature Limits 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 ML22266A0782022-09-26026 September 2022 William B. Mcguire Nuclear Station, Unit 2 Pressurizer Power Operated Relief Valve Relief Request ML22242A0022022-09-12012 September 2022 Issuance of Amendments to Adopt TSTF 569, Revision 2, Revise Response Time Testing Definition ML22213A2532022-08-31031 August 2022 Authorization and Safety Evaluation for Alternative Request RA-21-0144 to Use Reactor Vessel Head Penetration Embedded Flaw Repair Method ML22164A0362022-07-19019 July 2022 Mcguire Nuclear Station, Units 1 and 2; Issuance of Amendments to Revise the Conditional Exemption of the End-Of-Cycle Moderator Temperature Coefficient Measurement Methodology (EPID L-2021-LLA-0198) Public ML22096A1872022-07-15015 July 2022 Issuance of Amendment Nos. 424, 426, and 425 Revise TS 3.7.7, Low Pressure Service Water (LPSW) System to Extend the Completion Time for One Required Inoperable LPSW Pump ML22046A0222022-06-14014 June 2022 Issuance of Amendments to Adopt TSTF-439, Eliminate Second Completion Times Limiting Time from Discovery of Failure to Meet an LCO ML22068A0252022-03-15015 March 2022 Code Case OMN-28 - Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation ML22010A2812022-03-0404 March 2022 Issuance of Amendments to Adopt TSTF-577, Rev. 1 Revised Frequencies for Steam Generator Tube Inspections (EPID L-2021-LLA-0161 ML22046A2802022-02-23023 February 2022 Relief from ASME Code Paragraph ISTP-3540(b) Related to High Pressure Injection Pumps Vibration Measurements ML22046A2452022-02-18018 February 2022 Regarding Alternative to Implement Code Case OMN-22, Smooth Running Pumps ML22019A1352022-01-21021 January 2022 Proposed Alternative to Implement ASME Code Case OMN-24 ML22007A3452022-01-11011 January 2022 Proposed Alternative to Use the American Society of Mechanical Engineers Boiler and Pressure Vessel Code Case N-885 ML21347A0102021-12-20020 December 2021 Proposed Alternative to Implement ASME Code Case OMN-26 ML21335A1062021-12-0707 December 2021 Proposed Alternative to ASME Code W, Section XI, Subsection Iwl Regarding Containment Post-Tensioning System Inservice Inspection Requirements ML21281A1412021-11-19019 November 2021 Authorization and Safety Evaluation for Alternative Reactor Pressure Vessel Inservice Inspection Intervals ML21306A1592021-11-16016 November 2021 Request to Use Provisions of Later Edition and Addenda of the ASME Code, Section XI (EPID; L-2021-LLR-0048) ML21266A0112021-10-0505 October 2021 Staff Evaluation Related to Aging Management Program and Inspection Plan of Reactor Vessel Internals Per MRP-227, Revision 1-A ML21253A0822021-09-20020 September 2021 Proposed Alternative Request RA-21-0145 to Use Reactor Vessel Head Penetration Embedded Flaw Repair Method ML21155A2132021-08-26026 August 2021 Plant ML21131A0262021-06-23023 June 2021 Issuance of Amendments to Change Technical Specification 3.8.1, to Reduce Emergency Diesel Generator Maximum Voltage ML21113A0132021-05-0606 May 2021 Request for Use of a Later Edition of ASME Boiler and Pressure Vessel Code, Section XI for Repair and Replacement Activities ML21006A0982021-03-15015 March 2021 Issuance of Amendment Nos. 421, 423, and 422 Revision of Licensing Basis for High Energy Line Breaks Outside of Containment (EPID L-2019-LLA-0184) (Public Version) ML21029A3352021-02-16016 February 2021 Request to Use a Provision of a Later Edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI ML20335A0012021-01-26026 January 2021 Issuance of Amendment Nos. 420, 422, and 421 Measurement Uncertainty Recapture Power Uprate ML20303A0242020-12-0909 December 2020 Issuance of Amendments 419, 421, 420 TSTF-272, Refueling Boron Concentration Clarification ML20296A2812020-11-25025 November 2020 Issuance of Amendment Nos. 418, 420 and 419 TSTF-421, Revision to RCP Flywheel Inspection Program ML20300A2062020-11-0909 November 2020 Duke Fleet - Request to Use a Provision of a Later Edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section XI ML20258A2712020-09-21021 September 2020 Correction Letter to Amendment Nos. 301, 329, 307, 303, 178, 317, 296, 416, 418, 417, and 268 ML20237F4352020-09-0404 September 2020 Issuance of Amendments Regarding the Technical Specification Requirements Pertaining to Mode Change Limitations ML20230A2052020-08-21021 August 2020 Relief Request RA-20-0031, Delay to Update the Code of Record for Inservice Inspection ML20083F9272020-08-12012 August 2020 Issuance of Amendments to Relocate the Unit/Facility/Plant Staff Qualification Requirements to the Duke Energy Quality Assurance Program Description ML20174A0452020-08-0404 August 2020 Issuance of Amendment No. 306 to Revise Technical Specification 3.4.3, RCS (Reactor Coolant System) Pressure and Temperature (P/T) Limits ML20055F5712020-02-26026 February 2020 Proposed Alternative Request 19-ON-001 to Use Modified American Society of Mechanical Engineer'S Boiler and Pressure Vessel Code Case N-853 ML20042D7142020-02-13013 February 2020 Relief Request 19-ON-002 for Proposed Alternative to Reactor Vessel Nozzle Weld Examination Frequency Requirements in ASME Code Case N-770-2 ML19296D1192020-01-31031 January 2020 Issuance of Amendment Nos. 305 and 301 to Revise Technical Specification 3.0, Surveillance Requirement (SR) Applicability ML19260E0842019-10-31031 October 2019 Issuance of Amendments 415, 417, and 416, Regarding the Updated Final Safety Analysis Report Description of Tornado Mitigation ML19056A0862019-09-30030 September 2019 Issuance of Amendments Nos. 414, 416 and 415 Regarding the Physical Security Plan ML19254A6202019-09-17017 September 2019 Duke Energy Fleet (Brunswick, Catawba, Robinson, McGuire, Oconee, and Shearon Harris) - Alternative to Use Encoded Phased Array Ultrasonic Examination in Lieu of Radiography 2023-09-25
[Table view] |
Text
October 20, 2004 Mr. Henry B. Barron Group Vice President and Chief Nuclear Officer Duke Energy Corporation 526 South Church Street P.O. Box 1006 Charlotte, NC 28201-1006
SUBJECT:
CATAWBA NUCLEAR STATION, UNITS 1 AND 2, MCGUIRE NUCLEAR STATION, UNIT 2, AND OCONEE NUCLEAR STATION, UNIT 3 - REQUEST FOR RELIEF FOR USE OF AN ALTERNATE TO THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE, SECTION XI, FOR REACTOR VESSEL EXAMINATIONS RR-04-GO-002 (TAC NOS. MC3804, MC3805, MC3807, AND MC3810)
Dear Mr. Barron:
By letter to the U.S. Nuclear Regulatory Commission (NRC) dated July 14, 2004, as supplemented by letters dated September 1 and September 16, 2004, Duke Energy Corporation, the licensee for Catawba Nuclear Station (Catawba), Units 1 and 2, McGuire Nuclear Station (McGuire), Unit 2, and Oconee Nuclear Station (Oconee), Unit 3, requested the use of an alternative to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (Code),Section XI, IWA-2232, 1989 Edition with no Addenda.
Specifically, the licensee requested relief from certain qualification requirements for the reactor pressure vessel upper shell-to-flange welds.
The NRC staff has completed its review of the subject request for relief. As documented in the enclosed Safety Evaluation, the NRC staff concludes that the proposed alternative provides an acceptable level of quality and safety. Therefore, the NRC staff authorizes the proposed alternative pursuant to Title 10 of the Code of Federal Regulations, Section 50.55a(a)(3)(i), for the second 10-year inservice inspection (ISI) interval at Catawba, Units 1 and 2, McGuire, Unit 2, and for the third 10-year ISI interval at Oconee, Unit 3.
H. Barron All other ASME Code,Section XI requirements for which relief has not been specifically requested remain applicable, including third party review by the Authorized Nuclear Inservice Inspector.
Sincerely,
/RA by LOlshan for/
Mary Jane Ross-Lee, Acting Chief, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-413, 50-414, 50-370, and 50-287
Enclosure:
As stated cc w/encl: See next page
H. Barron All other ASME Code,Section XI requirements for which relief has not been specifically requested remain applicable, including third party review by the Authorized Nuclear Inservice Inspector.
Sincerely,
/RA by Lolshan for/
Mary Jane Ross-Lee, Acting Chief, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-413, 50-414, 50-370, and 50-287
Enclosure:
As stated cc w/encl: See next page DISTRIBUTION:
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- No major changes to SE NRR-028 OFFICE PDII-1:PM PDII-1:LA (A) DE/SC OGC PDII-1:SC (A)
NAME JShea DClarke TChan
- HMcGurren LOlshan forMRoss-Lee DATE 10/12/04 10/12/04 9/24/04 10/19/04 10/20/04 OFFICIAL RECORD COPY
McGuire Nuclear Station Catawba Nuclear Station Oconee Nuclear Station cc:
Ms. Lisa F. Vaughn Mr. Richard M. Fry, Director Duke Energy Corporation Division of Radiation Protection 422 South Church Street NC Dept. of Env., Health, & Nat. Resources Mail Code - PB05E 3825 Barrett Drive P.O. Box 1244 Raleigh, North Carolina 27609-7721 Charlotte, North Carolina 28201-1244 Ms. Karen E. Long, Asst. Attorney General County Manager of Mecklenburg County NC Department of Justice 720 East Fourth Street P.O. Box 629 Charlotte, North Carolina 28202 Raleigh, North Carolina 27602 Mr. C. Jeffrey Thomas, Manager Mr. R. L. Gill, Jr., Manager Regulatory Compliance Nuclear Regulatory Issues McGuire Nuclear Station and Industry Affairs Duke Energy Corporation Duke Energy Corporation 12700 Hagers Ferry Road 526 South Church Street - Mail Stop EC05P Huntersville, North Carolina 28078 Charlotte, North Carolina 28202 Anne Cottingham, Esquire NCEM REP Program Manager Winston and Strawn 4713 Mail Service Center 1400 L Street, NW. Raleigh, North Carolina 27699-4713 Washington, DC 20005 Mr. T. Richard Puryear Senior Resident Inspector Owners Group (NCEMC)
U.S. Nuclear Regulatory Commission Catawba Nuclear Station 12700 Hagers Ferry Road Duke Energy Corporation Huntersville, North Carolina 28078 4800 Concord Road York, South Carolina 29745 Mr. Peter R. Harden, IV, Vice President Customer Relations and Sales Mr. Lee Keller, Manager Westinghouse Electric Company Regulatory Compliance 6000 Fairview Road, 12th Floor Catawba Nuclear Station Charlotte, North Carolina 28210 Duke Energy Corporation 4800 Concord Road Dr. John M. Barry York, South Carolina 29745 Mecklenburg County Department of Environmental Protection North Carolina Municipal Power Agency 700 N. Tryon Street Number 1 Charlotte, North Carolina 28202 1427 Meadowwood Boulevard P.O. Box 29513 County Manager of York County Raleigh, North Carolina 27626-0513 York County Courthouse York, South Carolina 29745
McGuire Nuclear Station Catawba Nuclear Station Oconee Nuclear Station cc:
Piedmont Municipal Power Agency Mr. B. G. Davenport, Manager 121 Village Drive Regulatory Compliance Greer, South Carolina 29651 Oconee Nuclear Site Duke Energy Corporation Saluda River Electric 7800 Rochester Highway - MS ONO3RC P.O. Box 929 Seneca, South Carolina 29672 Laurens, South Carolina 29360 Mr. Dhiaa Jamil Henry Porter, Assistant Director - DWM Vice President Bureau of Solid and Hazardous Waste Catawba Nuclear Station Dept. of Health & Env. Control Duke Energy Corporation 2600 Bull Street 4800 Concord Road Columbia, South Carolina 29201-1708 York, South Carolina 29745 NC Electric Membership Corporation Mr. G. R. Peterson, Vice President P.O. Box 27306 McGuire Nuclear Station Raleigh, North Carolina 27611 Duke Energy Corporation 12700 Hagers Ferry Road Senior Resident Inspector Huntersville, North Carolina 28078 U.S. Nuclear Regulatory Commission 4830 Concord Road Mr. Ronald A. Jones, Vice President York, South Carolina 29745 Oconee Nuclear Station Duke Energy Corporation Manager, LIS 7800 Rochester Highway NUS Corporation Seneca, South Carolina 29672 2650 McCormick Drive, 3rd Floor Clearwater, Florida 34619-1035 Ms. Mary Olson Director of the Southeast Office Senior Resident Inspector Nuclear Information and Resource Service U.S. Nuclear Regulatory Commission 729 Haywood Road, 1-A 7812B Rochester Highway P.O. Box 7586 Seneca, South Carolina 29672 Asheville, North Carolina 28802 Mr. Michael A. Schoppman Framatome ANP 1911 North Ft. Myer Drive Suite 705 Rosslyn, Virginia 22209
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION ALTERNATE TO THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE, SECTION XI FOR REACTOR VESSEL EXAMINATIONS CATAWBA NUCLEAR STATION, UNITS 1 AND 2, MCGUIRE NUCLEAR STATION, UNIT 2 AND OCONEE NUCLEAR STATION, UNIT 3 DOCKET NOS. 50-413, 50-414, 50-370, AND 50-287
1.0 INTRODUCTION
By letter to the U.S. Nuclear Regulatory Commission (NRC) dated July 14, 2004, as supplemented by letters dated September 1 and September 16, 2004, Duke Energy Corporation, the licensee for Catawba Nuclear Station (Catawba), Units 1 and 2, McGuire Nuclear Station (McGuire), Unit 2, and Oconee Nuclear Station (Oconee), Unit 3, submitted a request for relief, Relief Request 04-GO-002, from the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (Code),Section XI, 1989 Edition with no Addenda, from certain examination requirements for Class 1, Examination Category B-A, pressure retaining welds in the reactor vessel. Specifically, the licensee requested to use an ultrasonic examination (UT) procedure, personnel and equipment qualified in accordance with ASME Code,Section XI, Division 1, Appendix VIII, Supplements 4 and 6, 1995 Edition with the 1996 Addenda as administered by the performance demonstration initiative (PDI) to examine the reactor pressure vessel (RPV) upper shell-to-flange welds. This would apply to the second 10-year inservice inspection (ISI) interval at Catawba, Units 1 and 2, McGuire, Unit 2, and for the third 10-year ISI interval at Oconee, Unit 3.
2.0 REGULATORY EVALUATION
2.1 Applicable Requirements The ISI of ASME Code, Class 1, 2, and 3, components shall be performed in accordance with Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components, of the ASME Code and applicable addenda as required by Title 10 of the Code of Federal Regulations (10 CFR), Section 50.55a(g), except where specific relief has been granted by the Commission pursuant to 10 CFR 50.55a(g)(6)(i). Section 50.55a(a)(3)(i) states that alternatives to the requirements of paragraph (g) may be used, when authorized by the NRC, if the licensee demonstrates that (i) the proposed alternatives would provide an acceptable level of quality and ENCLOSURE
safety, or (ii) compliance with the specified requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
Pursuant to 10 CFR 50.55a(g)(4), ASME Code, Class 1, 2, and 3, components (including supports) shall meet the requirements, except the design and access provisions and the pre-service examination requirements, set forth in the ASME Code,Section XI, to the extent practical within the limitations of design, geometry, and materials of construction of the components. The regulation requires that inservice examination of components and system pressure tests conducted during the first 10-year interval and subsequent intervals comply with the requirements in the latest edition and addenda of Section XI of the ASME Code incorporated by reference in 10 CFR 50.55a(b) 12 months prior to the start of the 120-month interval, subject to the limitations and modifications.
ASME Code,Section XI, 1989 Edition with no Addenda is the applicable code of record for all units requesting relief. Catawba, Unit 1, is in the second 10-year ISI interval, which started June 29, 1995, and ends June 29, 2005. Catawba, Unit 2, is in the second 10-year ISI interval, which started August 19, 1996, and ends August 19, 2006. McGuire, Unit 2, is in the second 10-year ISI interval, which started on March 1, 1994. The licensee was granted an extension of the second 10-year ISI interval for reactor vessel inspections up to 92 days beyond the 11 years permitted by the ASME Code not to exceed June 1, 2005. This relief request (03-004) was approved on July 20, 2004. Oconee, Unit 3, is in the third 10-year ISI interval, which started December 16, 1994, and ends December 16, 2004.
3.0 TECHNICAL EVALUATION
3.1 Systems/Components For Which Relief Is Requested This relief request applies to the ASME Code,Section XI, Class 1, Examination Category B-A, Item No. B1.30 welds identified below:
- a. 1RPV-W07 (Catawba, Unit 1)
- b. 2RPV-101-121 (Catawba, Unit 2)
- c. 2RPV-W07 (McGuire, Unit 2)
- d. 3RPV-WR19 (Oconee, Unit 3) 3.2 Code Requirements From Which Relief Is Requested The licensee is required to perform UT of the RPV upper shell-to-flange weld using ASME Code,Section XI, Appendix I which in turn references ASME Code Section V, Article 4. The additional guidance of Regulatory Guide (RG) 1.150, Revision 1 also applies. This is the only circumferential weld in the RPV that is not examined in accordance with the requirements of ASME Code,Section XI, Appendix VIII since the issuance of Federal Register Notice 64 FR 51370, dated September 22, 1999, which mandated use of ASME Code,Section XI, Appendix VIII, Supplements 4 and 6 for RPV examinations.
The 1989 Edition, no Addenda of the ASME Code,Section XI specifies the examination requirements for the RPV upper shell-to-flange welds. Paragraph IWA-2232 requires UTs to be conducted in accordance with ASME Code,Section XI, Appendix I, which makes reference to the ASME Code,Section V, Article 4. The licensee is requesting relief from performing examinations in accordance to the ASME Code,Section V, Article 4. The applicable ASME Code of record for Catawba, Units 1&2, McGuire, Unit 1, and Oconee, Unit 3 is listed in the table as follows:
Facility Applicable Code of record ISI interval Catawba, 1989 Edition, no Addenda Second Unit 1 (June 29, 1995 to June 29, 2005)
Catawba, 1989 Edition, no Addenda Second Unit 2 (August 19, 1996 to August 19, 2006)
McGuire, 1989 Edition, no Addenda Second Unit 2 (March 1, 1994 to March 1, 2004)*
Oconee, 1989 Edition, no Addenda Third Unit 3 (December 16, 1994 to December 16, 2004)
- The NRC granted an extension of the second 10-year ISI interval for McGuire, Unit 2 to perform the required reactor vessel examinations beyond the ASME Code allowable one-year extension period, which encompasses the entire duration of the spring 2005 refueling outage. This extension (which the licensee requested through Relief Request No.03-004) and the NRC staffs evaluation of the relief request are documented in a letter to the licensee dated July 20, 2004 (ADAMS Accession No. ML042030006). As a result, the licensee is required to request relief from the applicable ASME Code requirements for the second 10-year ISI interval.
3.3 Licensees Proposed Alternative The licensee proposes to use a UT procedure, personnel and equipment qualified in accordance with ASME Code Section XI, Division 1, Appendix VIII, Supplements 4 and 6, 1995 Edition with the 1996 Addenda as administered by the PDI to examine the RPV upper shell-to-flange welds at Catawba, Units 1 and 2, McGuire, Unit 2, and Oconee, Unit 3.
3.4 Licensees Basis for Use of Proposed Alternative ASME Code,Section V, Article 4, describes the required techniques to be used for the UT of welds in ferritic pressure vessels greater than 2 inches in thickness. These techniques were first published in ASME Code,Section V, Article 4, 1974 Edition, Summer 1975 Addenda. The calibration technique, recording criteria and flaw-sizing methods are based on the use of a distance-amplitude-correction (DAC) curve derived from machined reflectors in a basic calibration block.
Prior UT of the RPV welds used recording thresholds of 50 percent DAC for the outer 80 percent of the examination volume and 20 percent DAC from the clad/base metal interface to the inner 20 percent of the examination volume. Therefore, ultrasonic indications below the 20 percent DAC threshold at the clad/base metal interface and below 50 percent DAC in the remaining volume were not required to be recorded. Use of the ASME Code,Section XI,
Appendix VIII qualified procedure would enhance the detection sensitivity because the procedure requires the vendor to evaluate all indications determined to be flaws regardless of amplitude. The recording thresholds in ASME Code,Section V, Article 4 and RG 1.150, Revision 1 are arbitrary and do not consider flaw orientation which affects amplitude response.
EPRI [Electric Power Research Institute] Report NP-6273, March 1989, indicates that flaw-sizing techniques based on tip diffraction are the most accurate. The ASME Code,Section XI, Appendix VIII qualified procedure uses tip diffraction for flaw sizing and is considered technically superior to the prescriptive methodology of ASME Code,Section V, Article 4. The proposed alternative ultrasonic detection technique uses echo dynamics as an analysis tool which has been validated through performance demonstration. The flaw-sizing technique uses tip diffraction, also validated through performance demonstration, which is considered to be more accurate than the method prescribed in ASME Code,Section V, Article 4.
UTs performed in accordance with ASME Code,Section V, Article 4 require the use of 0°, 45°, 60°, and 70° beam angles with recording criteria that are time consuming and require equipment changes that increase personnel radiation exposure without a compensating increase in quality or safety. The use of an ASME Code,Section XI, Appendix VIII qualified procedure for all RPV shell welds would relieve the licensees inspection vendor from making equipment changes just to examine one weld with consequent savings in personnel exposure and examination time.
Previous UTs were performed using an automated and manual ultrasonic system in 1993 at McGuire, Unit 2, 1994 at Oconee, Unit 3, 1993 at Catawba, Unit 1, and 1995 at Catawba, Unit
- 2. Coverage for the RPV flange-to-upper-shell weld was greater than 90 percent for the volume shown in ASME Code,Section XI, Figure IWB-2500-4 for Catawba, Unit 1, Catawba, Unit 2, and McGuire, Unit 2. Because of interferences from clad patches on the vessel inside surface, coverage for Oconee, Unit 3 was 68 percent from the RPV shell surface using an automated ultrasonic system and 100 percent from the flange seal surface using manual ultrasonic equipment. The licensee does not anticipate any less coverage than previously reported.
3.5 Staff Evaluation The applicable ASME Code of record during the second 10-year ISI interval for Catawba, Units 1 and 2, and the third 10-year ISI interval for Oconee, Unit 3 is the ASME Code,Section XI, 1989 Edition, no Addenda. For McGuire, Unit 2, the licensee is requesting relief from the applicable requirements in this edition of the ASME Code, after the NRC staff granted an extension to the second 10-year ISI interval. The licensee proposes to use the qualification requirements contained in Supplements 4 and 6 in the 1995 Edition, 1996 Addenda of the ASME Code in lieu of the applicable ASME Code requirements. Supplements 4 and 6 use a performance-based approach for the qualification of procedures, personnel and equipment used for the inspection of welds in the clad/base metal interface of the reactor vessel (Supplement 4) and reactor vessel welds other than clad/base metal interface (Supplement 6).
Qualified prescriptive-based UT procedures in ASME Code,Section V, Article 4 have been applied in a controlled setting containing real flaws in mockups of reactor vessels and the results have been statistically analyzed according to the screening criteria in Appendix VIII of the ASME Code,Section XI. The results show that the procedures in ASME Code,Section V,
Article 4 are less effective than UT procedures qualified through Supplements 4 and 6.
Qualification through Supplements 4 and 6 uses fewer transducers than ASME Code,Section V, Article 4, and UT is performed with higher sensitivity, which increases the chances of detecting a flaw when compared to the prescriptive-based requirements in the ASME Code,Section V, Article 4. Also, flaw sizing is more accurately determined with the echo-dynamic motion and tip diffraction criteria used by Supplements 4 and 6, as opposed to the less accurate amplitude criteria for the prescriptive-based requirements in Section V, Article 4.
Procedures, equipment, and personnel qualified through the PDI program have shown high probability of detection levels. This has resulted in an increased reliability of inspections for weld configurations within the scope of the PDI program.
In the September 1 and September 16, 2004, letters to the NRC, the licensee provided information about the expected coverage using the proposed alternative versus the examination coverage achieved using current ASME Code requirements. The licensee also provided drawings of the RVP upper shell-to-flange welds for the affected units. The NRC staff reviewed this information and finds that the licensee expects to achieve 90.5 percent coverage with the vessel wall partial exam when using the proposed alternative for Catawba, Units 1 and 2, and McGuire, Unit 2, which is the same coverage achieved using ASME Code requirements. The licensee affirms that this partial exam accounts for 50 percent of the total examination required by the ASME Code. With regard to Oconee, Unit 3, the licensee estimates a 72.6 percent coverage with the vessel flange face partial exam when using the proposed alternative. This is an increase of 4.6 percent from the coverage obtained under current ASME Code requirements. This limitation in achieving more than 90 percent coverage for Oconee, Unit 3 is due to a surface geometry on the weld, that interferes with the positioning of the equipment and does not allow full coverage of the inspection volume. In addition, there are four clad patches above each main coolant loop nozzle that limit coverage of the outer surface of the weld and heat affected zone for 14.4 inches of the weld length above each nozzle. For the vessel flange face partial exam, which accounts for the remaining 50 percent of the total examination required by the ASME Code, the licensee stated that the coverage for the weld and the heat affected zone (100 percent) remains unaffected by the use of the proposed alternative on the four affected units.
The NRC staff has evaluated the information provided by the licensee and concludes that the proposed alternative would provide equivalent or better examination of the RPV upper shell-to-flange welds than current ASME Code requirements, as supplemented by RG 1.150. In addition, the NRC staff concludes that the estimated coverage achieved through the combination of the vessel wall and vessel flange face partial exams would reliably identify any service-related degradation on the affected welds. Therefore, the proposed alternative provides reasonable assurance that flaws that could be detrimental to the integrity of the RPV would be detected.
4.0 CONCLUSION
Based upon review of the information provided by the licensee in support of its request for relief, 04-GO-002, the NRC staff concludes that the licensees proposed alternative to use Supplements 4 and 6, Appendix VIII, 1995 Edition, 1996 Addenda of the ASME Code,Section XI, as administered by the PDI program, will provide an acceptable level of quality and safety.
Therefore, pursuant to 10 CFR 50.55a(a)(3)(i), the NRC staff authorizes the use of the
proposed alternative during the fall 2004 outage at Catawba, Unit 2 and Oconee, Unit 3 and the spring 2005 outage at Catawba, Unit 1 and McGuire, Unit 2. All other ASME Code,Section XI requirements for which relief was not specifically requested and approved in this relief request remain applicable, including third party review by the Authorized Nuclear Inservice Inspector.
Principal Contributor: R. Rodriguez Date: October 20, 2004