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Other: ML20071C899, ML21049A307, ML21165A344, ML21201A105, ML21242A330, ML21253A113, ML21272A183, ML21279A167, ML21293A026, ML21295A412, ML21323A074, ML22040A158, ML22108A286, ML22145A020, ML22186A150, ML22187A277, ML22188A089, ML22189A177, ML23025A353
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MONTHYEARML20071C8992020-03-24024 March 2020 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML20365A0702020-12-30030 December 2020 Schedule Change to Open Phase Condition Detection Implementation Project stage: Request ML21049A3072021-03-0505 March 2021 Status of Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21165A3442021-06-29029 June 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21201A1052021-07-27027 July 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21242A3302021-09-14014 September 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21253A1132021-09-20020 September 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21272A1832021-10-19019 October 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21279A1672021-10-22022 October 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21293A0262021-10-27027 October 2021 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other ML21295A4122021-11-15015 November 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML21323A0742021-11-22022 November 2021 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML22040A1582022-02-10010 February 2022 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other ML22108A2862022-04-29029 April 2022 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other ML22145A0202022-05-26026 May 2022 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML22186A1502022-07-0808 July 2022 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML22189A1772022-07-13013 July 2022 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other ML22187A2772022-07-19019 July 2022 Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System Project stage: Other ML22188A0892022-07-21021 July 2022 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other ML23025A3532023-01-26026 January 2023 Closeout of Bulletin 2012 01, Design Vulnerability in Electric Power System Project stage: Other 2021-07-27
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Category:Letter
MONTHYEARIR 05000369/20230042024-01-31031 January 2024 Integrated Inspection Report 05000369/2023004 and 05000370/2023004 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 IR 05000369/20234022023-12-14014 December 2023 Material Control and Accounting Program Inspection Report 05000369/2023402 and 05000370/2023402 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 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 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 05000369/20230052023-08-25025 August 2023 Updated Inspection Plan for McGuire Nuclear Station Units 1 and 2 (Report 05000369/2023005 and 05000370/2023005) IR 05000369/20230022023-07-28028 July 2023 Integrated Inspection Report 05000369/2023002 and 05000370/2023002 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 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 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 ML23115A2122023-05-0101 May 2023 Review of the Spring 2022 Steam Generator Tube Inspection Report 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 IR 05000369/20230012023-05-0101 May 2023 Integrated Inspection Report 05000369/2023001 and 05000370/2023001 ML23094A1832023-04-18018 April 2023 Audit Plan TSTF-505, Rev. 2, RITSTF Initiative 4B & 10 CFR 50.69, Risk-Informed Categorization & Treatment of Structures, Systems & Components for Nuclear Power Reactors (EPIDs L-2023-LLA-0021 & L-2023-LLA-0022) ML22332A4932023-03-10010 March 2023 William States Lee III 1 and 2 - Issuance of Amendments Regarding the Relocation of the Emergency Operations Facility IR 05000369/20220062023-03-0101 March 2023 Annual Assessment Letter for McGuire Nuclear Station Units 1 and 2 (NRC Inspection Report 05000369/2022006 and 05000370 2022006) IR 05000369/20220042023-01-30030 January 2023 Mcguire Nuclear Station - Integrated Inspection Report 05000369/2022004 and 05000370/2022004 IR 05000369/20224202023-01-11011 January 2023 Security Baseline Inspection Report 05000369/2022420 and 05000370/2022420 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 ML22347A1512022-12-13013 December 2022 William B. Mcguire Nuclear Station Notification of Licensed Operator Initial Examination 05000369/2023301 and 05000370/2023301 ML22340A6662022-12-0808 December 2022 Summary of November 30, 2022, Public Meeting with Duke Energy Carolinas, LLC for McGuire Nuclear Station, Units 1 & 2 Proposed LAR to Adopt TSTF-505, Rev. 2 and 10 CFR 50.69 Risk-Informed Categorization and Treatment of Structures, Systems 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 IR 05000369/20220032022-10-27027 October 2022 Integrated Inspection Report 05000369/2022003 and 05000370/2022003 IR 05000369/20220112022-09-29029 September 2022 Biennial Problem Identification and Resolution Inspection Report 05000369/2022011 and 05000370/2022011 ML22266A0782022-09-26026 September 2022 William B. Mcguire Nuclear Station, Unit 2 Pressurizer Power Operated Relief Valve Relief Request ML22258A0302022-09-15015 September 2022 Evacuation Time Estimate Reports ML22242A0022022-09-12012 September 2022 Issuance of Amendments to Adopt TSTF 569, Revision 2, Revise Response Time Testing Definition IR 07200038/20220012022-09-12012 September 2022 Operation of an Independent Spent Fuel Storage Installation Report 07200038/2022001 ML22230B6132022-09-0101 September 2022 Review of the Draft Environmental Assessment and Finding of No Significant Impact for Brunswick Steam Electric Plant and McGuire Nuclear Station Independent Spent Fuel Storage Installations Decommissioning Funding Plans IR 05000369/20220052022-08-29029 August 2022 Updated Inspection Plan for McGuire Nuclear Station Units 1 and 2 NRC Inspection Report 05000369/2022005 and 05000370/2022005 IR 05000369/20220022022-07-26026 July 2022 Integrated Inspection Report 05000369/2022002 and 05000370/2022002 ML22215A2502022-07-25025 July 2022 EN 55960 - Update - Curtiss Wright 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 ML22175A0162022-06-24024 June 2022 Notification of Inspection and Request for Information for NRC Problem Identification and Resolution Inspection 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 ML22111A3112022-05-16016 May 2022 Letter Issuing Exemption to McGuire IR 05000369/20224012022-05-12012 May 2022 Cyber Security Inspection Report 05000369/2022401 and 05000370/2022401 2024-01-31
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October 27, 2021 Mr. Tom Ray Site Vice President Duke Energy Carolinas, LLC 12700 Hagers Ferry Road Huntersville, NC 28078-8985
SUBJECT:
MCGUIRE NUCLEAR STATION UNITS 1 AND 2 - CLOSEOUT OF BULLETIN 2012-01, DESIGN VULNERABILITY IN ELECTRIC POWER SYSTEM (EPID L-2017-CRS-0063)
Dear Mr. Ray:
The purpose of this letter is to inform you that the U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of Duke Energy Carolinas, LLC (the licensee) responses to NRCs Bulletin (BL) 2012-01, Design Vulnerability in Electric Power System, dated July 27, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12074A115), for McGuire Nuclear Station Units 1 and 2 (McGuire), and has closed out BL 2012-01 for McGuire.
The NRC issued BL 2012-01 on July 27, 2012, to all holders of operating licenses and combined licenses for nuclear power reactors, except those who have ceased operation permanently and have certified that fuel has been removed from the reactor vessel. The Bulletin requested information about each facilitys electric power system designs that would allow the NRC staff to verify the systems capability to address open phase conditions.
Specifically, the NRC requested licensees to:
describe how the protection scheme for engineered safety features buses (Class 1E for current operating plants or non-Class 1E for passive plants) is designed to detect and automatically respond to a single-phase open circuit condition or high impedance ground fault condition on a credited offsite power circuits or another power source; and describe the operating configuration of engineered safety features buses (Class 1E for current operating plants or non-Class 1E for passive plants) at power (i.e., normal operating condition).
The above information was requested to confirm that licensees comply with 10 CFR 50.55a(h)(2) Protection systems, 10 CFR 50.55a(h)(3) Safety systems, and Appendix A to 10 CFR Part 50, GDC 17 Electric Power Systems, or principal design criteria specified in the updated final safety analysis report.
By letter dated October 25, 2012 (ADAMS Accession No. ML12307A018), the licensee provided its response to BL 2012-01 for McGuire. By letter dated January 30, 2014 (ADAMS Accession ML14043A112), the licensee provided supplemental information for this facility in response to an NRC staff request for additional information issued on December 20, 2013 (ADAMS Accession No. ML13351A314).
T. Ray By letters dated October 9, 2013, and March 16, 2015 (ADAMS Accession Nos. ML13333A147 and ML15075A454, respectively), the Nuclear Energy Institute (NEI) submitted a voluntary industry initiative to address open phase conditions at nuclear power plants. The NEI letter dated March 16, 2015, stated, in part: The initiative is a formal commitment by the companies that operate nuclear power plants to follow a specific policy or plan of action. The initiative calls for a proactive plan and schedule for addressing potential design vulnerabilities to the open phase condition.
To evaluate the adequacy of the open phase isolation systems designs, the NRC staff issued Temporary Instruction (TI) 2515/194, Inspection of the Licensees Implementation of Industry Initiative Associated with the Open Phase Condition Design Vulnerabilities in Electric Power Systems (NRC Bulletin 2012-01), dated October 31, 2017 (ADAMS Accession No. ML17137A416), which provided temporary inspection instructions for the purpose of verifying that licensees appropriately implemented the NEI voluntary industry initiative dated March 16, 2015. The NRC staff piloted the use of TI 2515/194 by inspecting four nuclear power plants with four distinct open phase isolation system designs. A summary of the NRC staffs preliminary observations and issues needing additional clarity were discussed with industry representatives in two public meetings conducted on September 19, 2018, and October 17, 2018. The meeting summaries can be found in ADAMS under Package Accession Nos. ML18268A342 and ML18309A226, respectively.
By letter dated June 6, 2019 (ADAMS Accession No. ML19163A176), NEI submitted Revision 3 of the voluntary industry initiative to include an option for plants to perform a risk evaluation under certain boundary conditions to support manual response to an open phase condition. NEI also submitted NEI 19-02, Guidance for Assessing Open Phase Condition Implementation Using Risk Insights on June 20, 2019 (ADAMS Accession No. ML19172A086). On August 18, 2020, the NRC staff issued Revision 2 of TI 2515/194 (ADAMS Accession No. ML20230A328),
which provided temporary inspection instructions for the purpose of verifying that licensees appropriately implemented Revision 3 of the NEI voluntary industry initiative. The revision accounted for changes reflected in Revision 3 of the NEI voluntary initiative.
In October 2019, the NRC staff performed inspections at McGuire using TI 2515/194 dated October 31, 2017. In December 2020, the NRC staff performed inspections at McGuire using TI 2515/194 Revision 2. These inspections at McGuire were performed to verify the licensees implementation of the voluntary industry initiative at this facility. To address the open phase condition design vulnerability issue at this facility, the licensee implemented open phase isolation system plant modifications, which provide detection and alarm in the control room, and necessary plant procedures that allow operators to diagnose and take manual action to mitigate an open phase condition. The NRC inspection reports listed below document the results of the TI 2515/194 inspections.
McGuire Nuclear Station - Temporary Instruction 2510 cfr 15/194 Inspection Report 05000369/2019011 and 05000370/2019011, dated November 26, 2019 (ADAMS Accession No. ML19330D480)
McGuire Nuclear Station - Integrated Inspection Report 05000369/2020004 and 05000370/2020004, dated January 26, 2021 (ADAMS Accession No. ML21026A254)
The NRC staff reviewed the information submitted by the licensee and the results of the TI 2515/194 inspections for McGuire. No findings or exceptions were identified. Based on the
T. Ray above, the NRC staff concludes that the licensee provided the necessary information requested in BL 2012-01 and has completed implementation of its open phase isolation system.
Therefore, the NRC staff closes BL 2012-01 for McGuire.
If you have any questions, please contact me at 301-415-5136 or John.Klos @nrc.gov Sincerely,
/RA/
John Klos, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-369, 50-370 cc: Listserv
ML21293A026 *by email OFFICE NRR/DORL/LPL2-1/PM NRR/DORL/LPL2-1/LA NRR/DEX/EEEB/BC NAME JKlos KGoldstein WMorton DATE 10/18/2021 10/26/2021 10/05/2021 OFFICE NRR/DRA/APOB/BC* NRR/DRO/IOEB/BC*
NAME AZoulis LRegner DATE 10/06/2021 10/06/2021 OFFICE NRR/DORL/LPL2-1/BC* NRR/DORL/LPL2-1/PM NAME MMarkley JKlos DATE 10/27/2021 10/27/2021