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Results
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
MONTHYEARML24025A0992024-01-25025 January 2024 Withdrawal of Request for Exemption from Specific 10 CFR Part 73 Requirements ML24018A0792024-01-22022 January 2024 Individual Notice of Consideration of Issuance of Amendment to Renewed Facility Operating License, Proposed Nshcd and Opportunity for a Hearing (EPID L-2024-LLA-0007) (Letter) ML24018A1382024-01-18018 January 2024 Inservice Inspection Request for Information ML24018A2482024-01-18018 January 2024 License Amendment Request to Modify the Implementation Date of License Amendment No. 238 IR 05000482/20230042024-01-11011 January 2024 Integrated Inspection Report 05000482/2023004 ML23356A0722024-01-0404 January 2024 Supplemental Information Needed for Acceptance of Requested Licensing Actions Exemption from Specific 10 CFR Part 73N Requirements (EPID L-2023-LLE-0048) (Redacted Version) WO 23-0002, Operating Corp., Summary of Actions Implemented for EA-18-165, Confirmatory Order, NRC Inspection Report 05000482/2019010 and NRC Investigation Report 4-2018-0082023-12-26026 December 2023 Operating Corp., Summary of Actions Implemented for EA-18-165, Confirmatory Order, NRC Inspection Report 05000482/2019010 and NRC Investigation Report 4-2018-008 ML23348A3662023-12-18018 December 2023 Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report 05000482 2024012) and Request for Information ML23334A2502023-11-30030 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23299A2662023-11-29029 November 2023 Issuance of Amendment No. 238 Modified Implementation Date of License Amendment No. 237 ML23331A4972023-11-27027 November 2023 Supplement to License Amendment Request to Modify the 90-Day Implementation of License Amendment No. 237 ML23325A2112023-11-20020 November 2023 Submittal of Request for Exemption from Specific Provisions in 10 CFR 73.55 ML23320A2772023-11-16016 November 2023 License Amendment Request to Revise Ventilation Filter Testing Program Criteria in Technical Specification 5.5.11.b and Administrative Correction of Absorber in Technical Specification 5.5.11 ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV ML23305A3472023-11-0101 November 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) ML23292A3592023-10-19019 October 2023 License Amendment Request to Modify the 90-Day Implementation of License Amendment No. 237 ML23292A3572023-10-19019 October 2023 Operating Corporation, Request for Correction in Response to Issuance of Amendment No. 237 and Corresponding Safety Evaluation ML23277A2772023-10-11011 October 2023 Regulatory Audit Summary Concerning Review of Request Number CI3R-01 for Proposed Alternative Inspection Frequency for Containment Unbonded Post Tensioning System Components ML23284A2392023-10-11011 October 2023 NRC Initial Operator Licensing Examination Approval 05000482/2023301 ML23276B4552023-10-0303 October 2023 Technical Specification 5.6.8 Post Accident Monitoring (PAM) Report ML23264A8682023-09-21021 September 2023 Independent Spent Fuel Storage Installation Registration of Dry Storage Canister WC-EOS-37PTH-008-B4L, WC-EOS-37PTH-007-B4L, and WC-EOS-37PTH-002-B4L ML23256A2062023-09-14014 September 2023 Withdrawal of Requested Licensing Action Exemption from Specific 10 CFR Part 73 Requirements ML23165A2502023-08-31031 August 2023 Issuance of Amendment No. 237 Request for Deviation from Fire Protection Requirements ML23243A0002023-08-31031 August 2023 Wolf Generating Station - Withdrawal of Request for Exemption from Specific 10 CFR Part 73 Requirements IR 05000482/20230052023-08-23023 August 2023 Updated Inspection Plan for Wolf Creek Nuclear Operating Corporation, Unit 1 (Report 05000482/2023005) - Mid-Cycle Letter 2023 ML23232A0012023-08-19019 August 2023 Revision of One Procedure That Implements the Radiological Emergency Response Plan (Rerp). Includes EPP 06-009, Rev. 13 ML23221A3932023-08-0909 August 2023 Submittal of Request for Exemption from Specific 10 CFR Part 73 Requirements ML23220A4222023-08-0808 August 2023 Supplement to License Amendment Request (LAR) for Deviation from Fire Protection Program Requirements ML23201A1212023-08-0707 August 2023 Issuance of Amendment No. 236 Revision to Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML23130A2902023-07-26026 July 2023 Issuance of Amendment No. 235 Revision to Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections IR 05000482/20230022023-07-11011 July 2023 Integrated Inspection Report 05000482/2023002 ML23167A0042023-06-26026 June 2023 Audit Plan to Support Review of Request for Alternative Containment Inservice Inspection Frequency IR 05000482/20234012023-06-21021 June 2023 Security Baseline Inspection Report 05000482/2023401 ML23171B1312023-06-20020 June 2023 Additional Supplement to License Amendment Request to Adopt TSTF-577-A, Revision 1, Revised Frequencies for Steam Generator Tube Inspections ML23151A4162023-05-31031 May 2023 Revision of One Form That Implements the Radiological Emergency Response Plan (RERP) for Wolf Creek Generating Station (WCGS) ET 23-0006, CFR 50.55a Request Number CI3R-01 for the Third Containment Inservice Inspection Program Interval for Proposed Alternative Frequency to Containment Unbonded Post-Tensioning System Components2023-05-17017 May 2023 CFR 50.55a Request Number CI3R-01 for the Third Containment Inservice Inspection Program Interval for Proposed Alternative Frequency to Containment Unbonded Post-Tensioning System Components WO 23-0014, Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-05-17017 May 2023 Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations ML23132A1532023-05-12012 May 2023 Transmittal of 2022 Annual Financial Reports WM 23-0009, Financial Assurance Requirements for Decommissioning Nuclear Power Reactors 10 CFR 50.75(f)(1)2023-05-10010 May 2023 Financial Assurance Requirements for Decommissioning Nuclear Power Reactors 10 CFR 50.75(f)(1) ML23135A1172023-05-0808 May 2023 Redacted Version of Revision 36 to Updated Safety Analysis Report ML23117A2112023-04-27027 April 2023 Annual Exposure Report (2022) ML23117A1342023-04-27027 April 2023 2022 Annual Radioactive Effluent Release Report Report 46 2024-01-04
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February 10, 2022 Mr. Cleveland Reasoner Chief Executive Officer and Chief Nuclear Officer Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839
SUBJECT:
WOLF CREEK GENERATING STATION, UNIT 1 - CLOSEOUT OF BULLETIN 2012-01, DESIGN VULNERABILITY IN ELECTRIC POWER SYSTEM (EPID L-2017-CRS-0063)
Dear Mr. Reasoner:
The purpose of this letter is to inform you that the U.S. Nuclear Regulatory Commission (NRC) staff has verified that Wolf Creek Nuclear Operating Corporation (the licensee) has provided the necessary information requested in 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 Wolf Creek Generating Station, Unit 1 (Wolf Creek). The NRC staff has completed its review of this information and has closed out BL 2012-01 for this facility.
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 permanently ceased operation 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 provide the following information:
A description of 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 offsite power circuits or another power source; and A description of 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).
By letter dated October 25, 2012 (ADAMS Accession No. ML12310A196), the licensee provided its response to BL 2012-01 for Wolf Creek. By letter dated February 3, 2014 (ADAMS Accession No. ML14042A159), 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).
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
C. Reasoner 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 e-mail dated June 6, 2019 (ADAMS Accession No. ML19163A176), NEI attached a letter submitting 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 December 2018, the NRC staff performed an inspection at Wolf Creek using TI 2515/194 dated October 31, 2017. In October 2021, the NRC staff performed an inspection at Wolf Creek using TI 2515/194 Revision 2. These inspections at Wolf Creek 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.
Wolf Creek Generating Station, Unit 1 - NRC Inspection of Temporary Instruction 2515/194, Inspection Report 05000482/2018011, dated January 14, 2019 (ADAMS Accession No. ML19015A018)
Wolf Creek Generating Station - Temporary Instruction 2515/194 Report 05000482/2021011, dated December 1, 2021 (ADAMS Accession No. ML21326A296)
The NRC staff reviewed the information submitted by the licensee and the results of the TI 2515/194 inspections for Wolf Creek. Two minor exceptions were identified at the time of the first inspection: (1) An alternate alignment path for one of the credited offsite sources was not
C. Reasoner monitored for open phase conditions because it was very infrequently used, and (2) The licensee had not determined the preventive maintenance process for the installed equipment.
The licensee captured these exceptions in its corrective action program, and since then has completed necessary actions to address these two exceptions. The NRC staff found the completed actions acceptable to resolve the exceptions. Based on this review, the NRC staff concludes that the licensee provided the necessary information requested in BL 2012-01 and has completed the implementation of its open phase isolation system. Therefore, the NRC staff closes BL 2012-01 for Wolf Creek.
If you have any questions, please contact me at 301-415-3168 or Samson.Lee@nrc.gov.
Sincerely,
/RA/
Samson S. Lee, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482 cc: Listserv
ML22040A158 OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/LA NRR/DEX/EEEB/BC NAME SLee PBlechman WMorton DATE 02/09/2022 2/10/2022 02/08/2022 OFFICE NRR/DRA/APOB/BC NRR/DRO/IOEB/BC NRR/DORL/LPL4/BC NAME AZoulis LRegner JDixon-Herrity DATE 02/09/2022 02/09/2022 02/10/2022 OFFICE NRR/DORL/LPL4/PM NAME SLee DATE 02/10/2022