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| Issue date | Title | Topic | |
|---|---|---|---|
| ML23256A088 | 25 September 2023 | Issuance of Alternative to Steam Generator Welds | Hydrostatic Probabilistic Risk Assessment Incorporated by reference Finite Element Analysis |
| ML23151A348 | 30 May 2023 | Duke Fleet - Request for Additional Information Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1) | Incorporated by reference |
| ML23118A076 | 1 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 | Incorporated by reference |
| RA-22-0257, Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1) | 17 February 2023 | Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1) | Weld Overlay Hydrostatic Finite Element Analysis Flow Accelerated Corrosion Stress corrosion cracking |
| ML22096A003 | 18 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 | Aging Management Stress corrosion cracking License Renewal Subsequent License Renewal |
| ML22213A253 | 31 August 2022 | Authorization and Safety Evaluation for Alternative Request RA-21-0144 to Use Reactor Vessel Head Penetration Embedded Flaw Repair Method | Non-Destructive Examination Stress corrosion cracking |
| ML22007A345 | 11 January 2022 | Proposed Alternative to Use the American Society of Mechanical Engineers Boiler and Pressure Vessel Code Case N-885 | |
| ML21029A335 | 16 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 | VT-2 Incorporated by reference |
| 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) | 11 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 2 | 12 November 2018 | Supplement to Relief Request for an Alternative to the Depth Sizing Qualification Requirement of Appendix Viii, Supplements 2 | Eddy Current Testing |
| ML18016A178 | 24 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) | VT-2 Incorporated by reference Stress corrosion cracking Liquid penetrant Through-Wall Leakage Dissimilar Metal Weld Operational leakage |
| ML17331A086 | 26 December 2017 | Alternative to Inservice Inspection Regarding Reactor Pressure Vessel Threads | Stress corrosion cracking Thermal fatigue |
| ML17104A110 | 26 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) | Operability Determination |
| CNS-17-020, Application to Adopt ASME Code Case OMN-20 (CN-GRR-01) for Pump and Valve Inservice Testing | 11 April 2017 | Application to Adopt ASME Code Case OMN-20 (CN-GRR-01) for Pump and Valve Inservice Testing | Incorporated by reference Operability Determination |
| ML15301A544 | 10 November 2015 | Proposed Relief Request 15-CN-001, Alternative Repair of a Main Steam System Braided Flex-Hose | Stress corrosion cracking |
| 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) | 16 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) | Unanalyzed Condition Functionality Assessment Operability Determination Operational leakage |
| ML15161A376 | 19 June 2015 | Proposed Relief Request 14-CN-002, Alternative to American Society of Mechanical Engineers (ASME) Section XI Requirements for Class 3 Buried Piping | VT-2 |
| ML15124A699 | 8 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 | Incorporated by reference |
| ML14295A532 | 30 October 2014 | Proposed Relief Request 14-CN-001, American Society of Mechanical Engineers (ASME) Section IX Volumetric Examination Requirements | VT-2 Incorporated by reference |
| ML14079A546 | 26 March 2014 | Proposed Relief Request 13-CN-003, Request for Alternative to the Requirement of IWB-2500, Table IWB-2500-1, Category B-A and Category B-D for Reactor Pressure Vessel Welds | Probabilistic Risk Assessment Incorporated by reference License Renewal |
| ML11187A001 | 14 July 2011 | Relief 10-CN-001, Alternative Requirements for Temporary Acceptance of a Through-Wall Flaw in Boric Acid Tank Nozzle Weld | Boric Acid Incorporated by reference Stress corrosion cracking Liquid penetrant Through-Wall Leak Through-Wall Leakage |
| ML101250170 | 3 May 2010 | Withdrawal of Request for Relief Number 09-CN-001, Limited Weld Examinations During the End-of-Cycle 17 Refueling Outage | |
| ML091240156 | 27 May 2009 | Relief 06-CN-003 for Use of Polyethylene Material in Buried Service Water Piping | Hydrostatic Nondestructive Examination VT-2 Incorporated by reference Finite Element Analysis |
| ML090230172 | 16 January 2009 | Response to NRC Requests for Additional Information and Request for Relief (Alternative) Number 08-CN-002 - Reactor Vessel Hot Leg Nozzle-to-Safe End Weld Full Structural Weld Overlays | Weld Overlay Dissimilar Metal Weld |
| ML083150630 | 6 November 2008 | Transmittal of Request for Relief Number 08-CN-002, Reactor Vessel Hot Leg Nozzle-to-Safe End Weld Full Structural Weld Overlays (Fswols) | Weld Overlay Hydrostatic Nondestructive Examination VT-2 Stress corrosion cracking Liquid penetrant Dissimilar Metal Weld DM weld |
| ML082240386 | 12 September 2008 | Relief 06-CN-003, Use of Polyethylene Material in Nuclear Safety-Related Piping Applications | Hydrostatic Nondestructive Examination VT-2 Incorporated by reference Finite Element Analysis |
| ML081560734 | 7 July 2008 | Request for Relief 07-CN-001, Limited Weld Examinations During End-Of -Cycle 14 Refueling Outage | Boric Acid Incorporated by reference Stress corrosion cracking Unidentified leakage |
| ML081600003 | 1 July 2008 | Request for Relief 07-CN-002, Limited Weld Examinations During End-of-Cycle 14 Refueling Outage | Boric Acid Incorporated by reference Stress corrosion cracking Unidentified leakage |
| ML073180447 | 27 August 2007 | Request for Relief Number 07-CN-004 Limited Weld Examinations During the End-of-Cycle 16 Refueling Outage | Boric Acid VT-2 Stress corrosion cracking Liquid penetrant Pressure Boundary Leakage Through Wall Leak Unidentified leakage Operational leakage |
| ML070650417 | 26 February 2007 | Submittal of Request for Relief Number 07-CN-003, Request for Relief to Allow Use of Alternate Requirements for Snubber Inspection & Testing | High Radiation Area Incorporated by reference Earthquake |
| ML063600014 | 9 January 2007 | Relief, Request to Use a Portion of a Letter Edition of ASME Code | Hydrostatic Incorporated by reference |
| ML063280188 | 16 November 2006 | Revision to Relief Request 06-GO-001 | Weld Overlay |
| ML062390020 | 25 September 2006 | Request for Relief 05-CN-004, Limited Weld Examinations During End-of-Cycle 15 Refueling Outage, MC8337, MC9171, MC9172, MC9173, MC9174, MC9175, MC9176, MC9177, MC9178, and MC9179) | Boric Acid Incorporated by reference Liquid penetrant Through-Wall Leak Dissimilar Metal Weld DM weld Unidentified leakage |
| ML062620261 | 11 September 2006 | Relief Request 06-GO-001 Request for Additional Information | Weld Overlay Stress corrosion cracking Dissimilar Metal Weld |
| ML062230421 | 7 September 2006 | Relief, Request for Relief for Snubber Visual Examination and Functional Testing Related to the Third 10-year Interval Inservice Inspection Program | Incorporated by reference |
| ML063490399 | 27 July 2006 | Relief Request 06-GO-001 | Non-Destructive Examination Weld Overlay Hydrostatic Nondestructive Examination Stress corrosion cracking Liquid penetrant Dissimilar Metal Weld |
| ML061660326 | 20 July 2006 | Request for Use of Later Edition and Addenda of the ASME Code | Nondestructive Examination Incorporated by reference |
| ML061680010 | 19 July 2006 | Regarding Request for Relief 05-CN-001, Limited Weld Examinations During End-of-Cycle 14 Refueling Outage | Boric Acid Incorporated by reference Stress corrosion cracking Liquid penetrant Through-Wall Leak Thermal fatigue |
| ML053550370 | 3 April 2006 | Relief, O5-CN-003 Limited Weld Examination Coverage | Nondestructive Examination Incorporated by reference Dissimilar Metal Weld |
| ML051780188 | 25 July 2005 | RR 04-CN-001, Volumetric Weld Inspection Requirements | VT-2 Incorporated by reference Liquid penetrant Operational leakage Thermal fatigue |
| ML051940367 | 13 July 2005 | Relief Request MC3057, 04-CN-002, Limited Weld Examinations During End-of-Cycle 12 Refueling Outage | VT-2 Downpower |
| ML051890143 | 28 June 2005 | Submittal of Third Ten-Year Interval Inservice Inspection Plan for Steam Generator Tubing | |
| ML051780164 | 23 June 2005 | RR 04-CN-004, Class 1 ISI Pressure Test Boundaries Requirement (Tac No. MC3276, MC3277) | Boric Acid Hydrostatic Nondestructive Examination VT-2 Incorporated by reference Flow Accelerated Corrosion Pressure Boundary Leakage Pressure boundary leak Unidentified leakage Unidentified leak |
| ML051020364 | 31 March 2005 | Relief, Request to Use a Later Edition and Addenda of the ASME Boiler and Pressure Vessel Code, Section XI for Repair/Replacement Activities at Catawba Nuclear Station, Unit 2 in Accordance with 10 CFR 50.55a(g) (4) (IV) | Incorporated by reference Backfit |
| ML050410532 | 17 March 2005 | RR, Alternative Code of Prv Nozzle Welds for Volumetic Examination RR-04-GO-001 | Incorporated by reference |
| ML050490462 | 17 February 2005 | Relief, RR No. 03-001, 10 CFR Section 50.55a (a)(3)(ii) for Second ISI Intervals | VT-2 Incorporated by reference Stress corrosion cracking Dissimilar Metal Weld Scaffolding Flow Induced Vibration Thermal fatigue |
| ML042810601 | 20 October 2004 | Relief Request, Alternate to the American Society of Mechanical Engineers Section XI for Reactor Vessel Examinations RR-04-GO-001 | Incorporated by reference |
| ML042740027 | 30 September 2004 | Relief, Amended Relief Request 03-GO-010 Requesting Use of Subsequent Edition and Addenda of the ASME Code for Class Mc and CC Components (MC9674-MC9680) | Nondestructive Examination VT-2 Incorporated by reference Moisture barrier |
| ML042730291 | 29 September 2004 | Request for Relief, 04-GO-006, for Use of an Alternate Code Case to Use Ultrasonic Techniques Equipment | Nondestructive Examination Incorporated by reference |
| ML042040394 | 20 July 2004 | Request for Relief 03-004, Minimum Percentage Requirements for Second Period of the Second Inservice Inspection Interval | Incorporated by reference Dissimilar Metal Weld |