Letter Sequence Other |
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EPID:L-2022-LLA-0140, Review of Limerick Generating Station Defense in Depth and Diversity Common Cause Failure Coping Analysis, WNA-AR-01074-GLIM-P, Rev 1. Without Attachment 3 Enclosure (Open) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance, Acceptance, Acceptance, Acceptance
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
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MONTHYEARML22046A0742022-02-14014 February 2022 Review of Limerick Generating Station Defense in Depth and Diversity Common Cause Failure Coping Analysis, WNA-AR-01074-GLIM-P, Rev 1. Without Attachment 3 Enclosure Project stage: Request PMNS20220709, Meeting Between NRC Staff and Constellation Energy Generation, LLC on the Review of the Defense-in-Depth and Diversity Coping Analysis Supporting the Digital Upgrade of Instrumentation and Controls at Limerick Generating Station, Units2022-07-22022 July 2022 Meeting Between NRC Staff and Constellation Energy Generation, LLC on the Review of the Defense-in-Depth and Diversity Coping Analysis Supporting the Digital Upgrade of Instrumentation and Controls at Limerick Generating Station, Units 1 an Project stage: Request ML22224A1492022-08-15015 August 2022 Review of Limerick Generating Station Defense in Depth and Diversity Common Cause Failure Coping Analysis, WNA-AR-01074-GLIM-P, Revision 2, July 2022, and the Licensing Technical Report for the Limerick Generating Station Units 1&2 Digital Project stage: Request ML23009A5622022-11-0707 November 2022, 14 November 2022, 11 January 2023 Summary of December 15, 2022 Public Meeting on Limeric Digital I&C LAR Acceptance Project stage: Request PMNS20221157, Meeting Between NRC and Constellation Energy Generation, LLC Regarding Ongoing Acceptance Review of Limerick Generating Station, Units 1 and 2 Digital Instrumentation and Controls License Amendment Request2022-11-0707 November 2022 Meeting Between NRC and Constellation Energy Generation, LLC Regarding Ongoing Acceptance Review of Limerick Generating Station, Units 1 and 2 Digital Instrumentation and Controls License Amendment Request Project stage: Acceptance Review ML22340A2172022-11-10010 November 2022, 21 November 2022, 6 December 2022 Summary of November 10, 2022, Meeting with Constellation Energy Generation, Lic on Acceptance Review of Limerick Digital Instrumentation and Controls License Amendment Requests Project stage: Request ML22312A4402022-11-10010 November 2022 Public Meeting with Constellation About Acceptance Review: Status of NRC Staff'S Acceptance Review of the Limerick Digital Instrumentation and Controls License Amendment Request Project stage: Acceptance Review ML22319A0012022-11-14014 November 2022 Constellation Energy Generation, Llc'S Presentation for November 10, 2022 Public Meeting with NRC Project stage: Request ML22320A1132022-11-21021 November 2022 Generation Station, Units 1 and 2 - Supplemental Information Needed for Acceptance of Digital Instrumentation and Controls License Amendment Requests Project stage: Acceptance Review ML22333A8172022-11-29029 November 2022 Response to Supplemental Information Needed for Acceptance of Digital Instrumentation and Controls License Amendment Requests for the Limerick Generating Station Project stage: Supplement ML22327A0192022-12-0606 December 2022 Summary of November 10, 2022, Meeting with Constellation Energy Generation, Lic on Acceptance Review of Limerick Digital Instrumentation and Controls License Amendment Requests Project stage: Acceptance Review ML22339A0642022-12-0909 December 2022 Generation Station, Unit Nos. 1 and 2 Acceptance of Requested Licensing Action Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System Project stage: Acceptance Review ML22347A1532022-12-13013 December 2022 Public Meeting Presentation, December 15, 2022 Di&C License Amendment Request Project stage: Meeting ML23003A1702022-12-15015 December 2022 Official Transcript of the 12/15/22 Meeting with Constellation Energy to Discuss the Exceptions Described for the Independence and Operating Bypass with IEEE 603 of the Proposed Plant Protection System in the Limerick Station, Units 1 and 2 Project stage: Meeting ML23009A5872023-01-11011 January 2023 Summary of December 15, 2022, Meeting with Constellation Energy Generation, LLC on Potential Compliance with Certain Clauses of IEEE Standard 603-1991 in Limerick Digital Instrumentation and Controls License Amendment Requests Project stage: Meeting ML22353A6322023-01-17017 January 2023 Supplement to Regulatory Audit Plan in Support of Review of Digital I&C Upgrade to Protection Systems (EPID L-2022-LLA-0140) - Non-Proprietary Project stage: Other PMNS20230026, Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-01-20020 January 2023 Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23076A1062023-01-20020 January 2023, 12 May 2023 Summary of Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request ML23032A2442023-02-0606 February 2023 Regulatory Audit Plan for Review of Human Factors Engineering Portion of Limerick Digital Instrumentation and Controls License Amendment Request Project stage: Other ML23039A1412023-02-0808 February 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS)-Human Factors Engineering Project stage: Supplement ML23046A2662023-02-15015 February 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System Project stage: Supplement PMNS20230032, Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-02-23023 February 2023 Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting PMNS20230033, Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-03-0606 March 2023 Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23121A0042023-03-0606 March 2023, 12 May 2023 Summary of March 29, 2023, Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request ML23118A3792023-03-17017 March 2023, 9 June 2023 April 12, 2023, Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request PMNS20230254, Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-03-17017 March 2023 Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23089A3242023-03-30030 March 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System Human Factors Engine Project stage: Supplement ML23095A2232023-04-0505 April 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS)- Human Factors Project stage: Supplement PMNS20230423, Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-04-17017 April 2023 Meeting with Constellation Energy Generation, LLC Regarding Planned Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23132A3092023-04-17017 April 2023, 18 May 2023 Summary of May 3, 2023, Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request ML23076A1042023-05-12012 May 2023 Summary of Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23076A0132023-05-12012 May 2023 March 15, 2023, Summary of Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23121A0022023-05-12012 May 2023 Summary of March 29, 2023, Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting PMNS20230627, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-05-15015 May 2023 Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23145A0672023-05-15015 May 2023, 31 May 2023 May 17, 2023, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request PMNS20230606, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-05-16016 May 2023 Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23156A4172023-05-16016 May 2023, 9 June 2023 Summary of May 24, 2023, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Request ML23132A3082023-05-18018 May 2023 Summary of May 3, 2023, Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23143A3422023-05-23023 May 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System Project stage: Supplement ML23145A0352023-05-31031 May 2023 Summary of May 17, 2023, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23156A2472023-06-0909 June 2023 Summary of Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23118A3752023-06-0909 June 2023 Summary of Audit Meeting with Constellation Energy Generation Concerning a Digital Instrumentation and Control Upgrade License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23177A2242023-06-26026 June 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection . Project stage: Supplement PMNS20230846, Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 22023-07-18018 July 2023 Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request for Limerick Generating Station, Units 1 and 2 Project stage: Meeting ML23187A0962023-07-19019 July 2023 Generation Station, Unit Nos. 1 and 2 - Revised Estimated Review Completion Date Concerning License Amendment Request to Replace Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System Project stage: Other 2023-02-23
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Category:Audit Plan
MONTHYEARML24263A0032024-09-27027 September 2024 Generation Station, Units 1 and 2 – Regulatory Audit Plan Supporting Review of the Component Interface Module System of the Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140) (Redacted) ML24208A1592024-07-25025 July 2024 Regulatory Audit Plan Supporting Review of the System Development Portion of Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140) - Non-Proprietary ML23241A9452023-09-27027 September 2023 Generation Station, Units 1 and 2 Regulatory Audit Plan Supporting Review of the Equipment Qualification Portion of Limerick Digital Instrumentation and Controls License Amendment Request ML23193B0122023-07-20020 July 2023 Audit Plan in Support of Review of License Amendment Request and Exemption Request for Digital Instrumentation and Controls Installation Support (Epids L-2023-LLA-0025 and L-2023-LLE-0005) ML23079A1882023-03-24024 March 2023 Summary of Regulatory Audit in Support of Alternate Processes for Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors ML23032A2442023-02-0606 February 2023 Regulatory Audit Plan for Review of Human Factors Engineering Portion of Limerick Digital Instrumentation and Controls License Amendment Request ML22353A6322023-01-17017 January 2023 Supplement to Regulatory Audit Plan in Support of Review of Digital I&C Upgrade to Protection Systems (EPID L-2022-LLA-0140) - Non-Proprietary ML22214A0042022-08-0202 August 2022 Audit Plan to Support the Review of Amendments to Revise Criticality Safety Analysis Methodologies (Epids L-2022-LLA-0085, L-2021-LLA-0124, and L-2021-LLA-0159) ML22110A0972022-05-0909 May 2022 Regulatory Audit Plan in Support of Review of Defense in Depth and Diversity Common Cause Failure Coping Analysis ML21263A2482021-10-0101 October 2021 Audit Plan Supporting LAR Request to Implement Alternate Defense-in-Depth, Pressure Boundary, & Seismic Tier 1 Categorization Process in Accordance with Requirements of 10 CFR 50.69 ML19133A0862019-05-20020 May 2019 Regulatory Audit in Support of License Amendment Requests to Adopt TSTF-505, Revision 2 ML17303A1532017-11-0606 November 2017 Regulatory Audit Plan and Audit Questions License Amendment Request to Adopt 10 CFR Section 50.69 (CAC Nos. MF9873 and MF9874; EPID L-2017-LLA-0275) ML17220A3282017-08-10010 August 2017 Nuclear Regulatory Commission Audits of Licensee Responses to Phase 2 of Order EA-13-109 to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions ML16259A1892016-12-0505 December 2016 Nuclear Regulatory Commission Plan for the Audit of Mitigation Strategies Assessment Submittals Related to Order EA-12-049, Order to Modify Licenses With Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events ML14083A6202014-03-26026 March 2014 Nuclear Regulatory Commission Audits of Licensee Responses to Reliable Spent Fuel Pool Instrumentation Order EA-12-051 2024-09-27
[Table view] Category:Letter
MONTHYEARIR 05000352/20240122024-10-17017 October 2024 Commercial Grade Dedication Inspection Report 05000352/2024012 and 05000353/2024012 RS-24-093, Response to Request for Additional Information - Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests2024-10-10010 October 2024 Response to Request for Additional Information - Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests ML24274A2372024-10-0707 October 2024 – Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Primary Containment Leakage Technical Specifications ML24278A3022024-10-0404 October 2024 Supplement to License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10 CFR 50.62 ATWS Rule to Support the Digital Modernization Project Installation - Rev Unit 2 Technical Spec ML24275A2442024-10-0303 October 2024 Reassignment of the U.S. Nuclear Regulatory Commission Branch Chief, Division of Operating Reactor Licensing ML24263A0032024-09-27027 September 2024 Generation Station, Units 1 and 2 – Regulatory Audit Plan Supporting Review of the Component Interface Module System of the Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140) (Redacted) ML24243A0482024-09-19019 September 2024 Generation Station, Unit Nos. 1 and 2 - Schedule Update for License Amendment Request to Replace Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System ML24215A4042024-09-18018 September 2024 Request for Withholding Information from Public Disclosure IR 05000352/20244202024-09-16016 September 2024 – Security Baseline Inspection Report 05000352/2024420 and 05000353/2024420 RS-24-090, Response to Request for Additional Information - Relief Request Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds2024-09-12012 September 2024 Response to Request for Additional Information - Relief Request Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds IR 05000352/20250102024-09-10010 September 2024 Information Request for Quadrennial Baseline Comprehensive Engineering Team Inspection; Notification to Perform Inspection 05000352/2025010 and 05000353/2025010 ML24255A8642024-09-0606 September 2024 Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification IR 05000352/20230022024-09-0404 September 2024 Reissued Integrated Inspection Report 05000352/2023002 and 05000353/2023002 IR 05000352/20240052024-08-29029 August 2024 Updated Inspection Plan for Limerick Generating Station, Units 1 and 2 (Report 05000352/2024005 and 05000353/2024005) ML24241A1952024-08-28028 August 2024 License Amendment Request for Modification to Technical Specification 3.6.1.2 and Main Steam Isolation Valve Leakage Rate Requirements ML24239A3972024-08-23023 August 2024 Rssc Wire & Cable LLC Dba Marmon - Part 21 Final Notification - 57243-EN 57243 ML24163A3902024-08-14014 August 2024 Request for Withholding Information from Public Disclosure IR 05000352/20240022024-08-12012 August 2024 Integrated Inspection Report 05000352/2024002 and 05000353/2024002 ML24220A2392024-08-12012 August 2024 Correction to Technical Specification Page 3/4 3-11 in Amendment No. 225 ML24222A6772024-08-0909 August 2024 Response to Request for Additional Information for Application to Revise Technical Specifications to Adopt TSTF-591-A, Revise Risk Informed Completion Time (RICT) Program Revision 0 and Revise 10 CFR 50.69 License Condition ML24204A0712024-07-29029 July 2024 Issuance of Amendment Nos. 263 and 225 Technical Specifications for Main Steam Line Tunnel Temperature ML24208A1592024-07-25025 July 2024 Regulatory Audit Plan Supporting Review of the System Development Portion of Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140) - Non-Proprietary ML24208A0962024-07-25025 July 2024 57243-EN 57243 - Rssc Wire & Cable LLC, Dba Marmon - Part 21 Notification ML24201A1662024-07-19019 July 2024 Response to Request for Additional Information for License Amendment Request for Proposed Changes to the Technical Specification Isolation Actuation Instrumentation Tables and New Turbine Enclosure Main Steam L ML24199A1842024-07-15015 July 2024 RAI-LAR for Limerick EPID: L-2024-LLA-0079- Use This Version RS-24-070, Independent Spent Fuel Storage Installation, Nine Mile Point, Units 1 and 2, Quad Cities, Units 1 and 2, R. E. Ginna - Nuclear Radiological Emergency Plan Document Revisions2024-07-12012 July 2024 Independent Spent Fuel Storage Installation, Nine Mile Point, Units 1 and 2, Quad Cities, Units 1 and 2, R. E. Ginna - Nuclear Radiological Emergency Plan Document Revisions ML24180A1572024-06-28028 June 2024 Request to Return and Replace WEC Documents (EQ-EV-386-GLIM, EQ-QR- 433-GLIM, and APP-GW-GLR-611), to Meet 10CFR2.390 Request to Withdraw from Public Disclosure Requirements ML24170A7702024-06-20020 June 2024 Individual Notice of Consideration of Issuance of Amendments to Renewed Facility Operating Licenses, Proposed No Significant Hazards Consideration Determination, Opportunity for Hearing(Epid L-2024-LLA-0079) LTR ML24166A1142024-06-14014 June 2024 Response to Requests for Additional Information (RAIs 15 Through 23) for License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems RS-24-061, Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations2024-06-14014 June 2024 Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations ML24165A2642024-06-13013 June 2024 License Amendment Request for Proposed Changes to the Technical Specification Isolation Actuation Instrumentation Tables and New Turbine Enclosure Main Steam Line Tunnel Temperature TS 3/4.7.9 ML24151A2012024-06-10010 June 2024 Request for Withholding Information from Public Disclosure ML24151A2882024-06-10010 June 2024 Request for Withholding Information from Public Disclosure ML24150A0242024-05-29029 May 2024 Notification of Commercial Grade Dedication Inspection (05000352/2024012 and 05000353/2024012) and Request for Information ML24149A2112024-05-28028 May 2024 Supplement to License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the Digital Modernization Project Installation ML24079A0762024-05-23023 May 2024 Issuance of Amendments to Adopt TSTF 264 IR 05000352/20243022024-05-20020 May 2024 Revised Initial Operator Licensing Examination Report 05000352/2024302 and 05000353/2024302 RS-24-055, 2023 Corporate Regulatory Commitment Change Summary Report2024-05-17017 May 2024 2023 Corporate Regulatory Commitment Change Summary Report IR 05000352/20240012024-05-0707 May 2024 Integrated Inspection Report 05000352/2024001 and 05000353/2024001 ML24124A0432024-05-0303 May 2024 Response to Requests for Additional Information (RAIs 9 Through 14) for License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with RS-24-038, Relief Request Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds2024-05-0202 May 2024 Relief Request Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds RS-24-041, Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests2024-04-30030 April 2024 Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests ML24114A3222024-04-23023 April 2024 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS) - Pivot to Unit ML24109A0702024-04-18018 April 2024 Supplement to License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFRC50.52 ATWS Rule to Support the Digital Modernization Project Installation . ML24093A0912024-04-17017 April 2024 Revised Estimated Review Completion Date Concerning License Amendment Request to Replace Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System ML24106A1832024-04-15015 April 2024 Submittal of Changes to Technical Specifications Bases ML24103A2042024-04-12012 April 2024 Constellation Energy Generation, LLC, Application to Revise Technical Specifications to Adopt TSTF-591-A, Revise Risk Informed Completion Time (RICT) Program Revision 0 and Revise 10 CFR 50.69 License Condition ML24096A1372024-04-0505 April 2024 Request for Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.214 for Limerick Generating Station – Holtec MPC-89CBS RS-24-002, Constellation Energy Generation, LLC - Annual Property Insurance Status Report2024-04-0101 April 2024 Constellation Energy Generation, LLC - Annual Property Insurance Status Report IR 05000352/20244012024-03-19019 March 2024 Security Baseline Inspection Report 05000352/2024401 and 05000353/2024401 2024-09-06
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Text
OFFICIAL USE ONLY - PROPRIETARY INFORMATION
September 27, 2024
David P. Rhoades Senior Vice President Constellation Energy Generation, LLC President and Chief Nuclear Officer Constellation Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
LIMERICK GENERATING STATION, UNITS 1 AND 2 - REGULATORY AUDIT PLAN SUPPORTING REVIEW OF THE COMPONENT INTERFACE MODULE SYSTEM OF THE LIMERICK DIGITAL INSTRUMENTATION AND CONTROLS LICENSE AMENDMENT REQUEST (EPID L-2022-LLA-0140)
Dear David Rhoades:
By letter dated September 26, 2022 (non-publicly available), as supplemented by letters dated August 12, 2022 (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML22224A149), November 29, 2022 (ML22333A817), February 8, 2023 (ML23039A141), February 15, 2023 (ML23046A266), March 30, 2023 (ML23089A324),
April 5, 2023 (ML23095A223), June 26, 2023 (ML23177A224), July 31, 2023 (ML23212B236),
September 12, 2023 (ML23255A095), October 30, 2023 (ML23303A223), November 21, 2023 (ML23325A206), January 26, 2024 (ML24026A296), February 26, 2024 (ML24057A427),
March 7, 2024 (ML24067A294), March 18, 2024 (ML24078A275), May 3, 2024 (ML24124A043), June 13, 2024 (ML24165A264), June 14, 2024 (ML24166A114), and June 28, 2024 (ML24180A157), respectively, Constellation Energy Generation, LLC (the licensee) submitted license amendment requests (LARs) to replace the Limerick Generating Station, Units 1 and 2 (Limerick) existing safety-related analog control systems with a single digital control system called the plant protection system. The supplement dated September 12, 2023, replaces in its entirety the original LARs dated September 26, 2022. The licensee replaced the original submittal because it had mistakenly included proprietary information in the non-proprietary parts of the request. The U.S. Nuclear Regulatory Commission (NRC) staff made all of the original submittal non-public. With the exceptions noted by the licensee in the letter dated September 12, 2023, the content of the replacement and the original are the same.
The proposed amendment requests would change both the design and technical specifications to permit the use of a new single digital instrumentation and controls (I&C) plant protection system to replace analog instrumentation of reactor protection system, analog nuclear steam supply shutoff system, emergency core cooling system, reactor core isolation cooling system, and end-of-cycle recirculation pump trip at Limerick. In addition, the proposed amendments
Enclosure 1 to this letter contains Proprietary Information. When separated from Enclosure 1, this letter is DECONTROLLED.
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION
D. Rhoades would change the classification of the redundant reac tivity control system from safety-related to non-safety-related, eliminate the automatic redundant reactivity control system feedwater runback function, eliminate several surveillance requirements, and allow the use of automated operator aids (or automated controls) from main control room.
The NRC staff determined that a regulatory audit is needed to assist in the review of the Limerick digital I&C LARs. This audit will be focused on the component interface module system. The regulatory audit will be conducted remotely between October 7 and October 25, 2024. Additional details for the audit are in the enclosed audit plan.
The NRC determined that the audit plan contains proprietary information pursuant to Title 10 of the Code of Federal Regulations Section 2.390, Public inspections, exemptions, requests for withholding. The proprietary information is indicated by text enclosed within double brackets.
Accordingly, the NRC staff has also prepared a non-proprietary publicly available version of the audit plan, which is provided as Enclosure 2. The proprietary version of the audit plan is provided as Enclosure 1.
If you have any questions, please contact me by telephone at 301-415-2871 or by email to michael.marshall@nrc.gov.
Sincerely,
/RA/
Michael L. Marshall, Jr., Senior Project Manager Plant Licensing Branch 1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
Docket Nos. 50-352 and 50-353
Enclosures:
- 1. Audit Plan (Proprietary)
- 2. Audit Plan (Non-Proprietary)
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION
AUDIT PLAN FOR COMPONENT INTERFACE MODULE SYSTEM OF LIMERICK DIGITAL
INSTRUMENTATION AND CONTROLS LICENSE AMENDMENT REQUEST
CONSTELLATION ENERGY GENERATION, LLC
LIMERICK GENERATING STATION, UNITS 1 AND 2
DOCKET NOS. 50-352 AND 50-353
1.0 BACKGROUND
By letter dated September 26, 2022 (non-publicly available), as supplemented by letters dated August 12, 2022 (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML22224A149), November 29, 2022 (ML22333A817), February 8, 2023 (ML23039A141), February 15, 2023 (ML23046A266), March 30, 2023 (ML23089A324),
April 5, 2023 (ML23095A223), June 26, 2023 (ML23177A224), July 31, 2023 (ML23212B236),
September 12, 2023 (ML23255A095), October 30, 2023 (ML23303A223), November 21, 2023 (ML23325A206), January 26, 2024 (ML24026A296), February 26, 2024 (ML24057A427),
March 7, 2024 (ML24067A294), March 18, 2024 (ML24078A275), May 3, 2024 (ML24124A043), June 13, 2024 (ML24165A264), June 14, 2024 (ML24166A114), and June 28, 2024 (ML24180A157), Constellation Energy Generation, LLC (Constellation; the licensee) submitted license amendment requests (LARs) to replace the Limerick Generating Station, Units 1 and 2 (Limerick) existing safety-related analog control systems with a single digital control system called plant protection system (PPS). The supplement dated September 12, 2023, replaces in its entirety the original LARs dated September 26, 2022. The licensee replaced the original submittal because it had mistakenly included proprietary information in the non-proprietary parts of the request. The U.S. Nuclear Regulatory Commission (NRC) staff made all of the original submittal non-public. With the exceptions noted by the licensee in the letter dated September 12, 2023, the content of the replacement and the original are the same.
The proposed amendment requests would change both the design and technical specifications to permit the use of a new single digital instrumentation and controls (I&C) PPS to replace the previously independent analog instrumentation subsystems of the reactor protection system, the nuclear steam supply shutoff system (NSSSS), emergency core cooling system (ECCS), reactor core isolation cooling system, and end-of-cycle recirculation pump trip at Limerick. In addition, the proposed amendments would change the classification of the redundant reactivity control system from safety-related to non-safety-related, eliminate the automatic redundant reactivity control system feedwater runback function, e liminate several surveillance requirements, and allow the use of automated operator aids (or automated controls) from main control room.
Enclosure 1
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The Limerick digital I&C modification incorporates the component interface module (CIM) system, which is composed of the CIM and the safety-related node controller (SRNC). The CIM system is a critical common link in the safety-related digital I&C system architecture that acts as a priority module whose safety-related function is being shared by the:
Safety-related Common Q-based PPS
Non-safety-related Ovation-based distributed control system (DCS)
Non-safety-related diverse protection system (DPS) (which is also part of the DCS)
The manual back-up capability for actuating NSSSS and ECCS components
The licensee has made the claim that the CIM system is not susceptible to a CCF based on two arguments: ((
)). The concern regarding the CIM system possessing an adequate level of diversity is due to the fact that if the CIM system experiences a CCF, ((
)). The NRC staffs review of the CIM system includes evaluation of the CIM systems design and testing attributes related to Constellations defense in depth and diversity common cause failure coping analysis (D3) for the Limerick digital modernization project.
The NRC staff has determined that a regulatory audit is needed to assist in the review of the Limerick digital I&C LAR. This audit will be focused on the CIM system. This regulatory audit will enable the NRC staff to gain understanding, verify in formation, and identify information that may be required to support a safety determination in its safety evaluation.
2.0 REGULATORY AUDIT BASES
A regulatory audit is a planned license activity that includes the examination and evaluation of primarily non-docketed information. The audit is conducted with the intent to gain understanding, to verify information, and to identify information that will require docketing to support the basis of a licensing or regulatory decision. Performing a regulatory audit is expected to assist the NRC staff in efficiently conducting its review and gaining insights to the licensees processes and procedures. Information that the NRC staff relies upon to make the safety determination must be submitted on the docket. This audit will be conducted in accordance with NRR Office Instruction LIC-111, Regulatory Audits, Revision 1, dated October 2019 (ML19226A274). This audit is being conducted to support the NRC staffs review of the Limerick digital I&C license amendment request.
Regulations and policy relevant to the NRC staffs review of the CIM system include:
Appendix A, General Design Criteria for Nuclear Power Plants, of Title 10 of the Code of Federal Regulations (10 CFR) Part 50, Domestic Licensing of Production and Utilization Facilities:
o Criterion 21, Protection system reliability and testability, which states, in part:
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The protection system shall be designed for high functional reliability and inservice testability commensurate with the safety functions to be performed.
o Criterion 22, Protection system independence, which states:
The protection system shall be designed to assure that the effects of natural phenomena, and of normal operating, maintenance, testing, and postulated accident conditions on redundant channels do not result in loss of the protection function, or shall be demonstrated to be acceptable on some other defined basis. Design techniques, such as functional diversity or diversity in component design and principles of operation, shall be used to the extent practical to prevent loss of the protection function.
Appendix B, Quality Assurance Criteria fo r Nuclear Power Plants and Fuel Reprocessing Plants, of 10 CFR Part 50:
o Section III, Design Control, which states, in part, that:
The design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculational methods, or by the performance of a suitable testing program. The verifying or checking process shall be performed by individuals or groups other than those who performed the original design, but who may be from the same organization. Where a test program is used to verify the adequacy of a specific design feature in lieu of other verifying or checking processes, it shall include suitable qualifications testing of a prototype unit under the most adverse design conditions.
For nuclear power plants with construction permits issued after January 1, 1971, but before May 13, 1999, Section 50.55a(h), Protection and safety systems, of 10 CFR Part 50, requires protection systems to meet the requirem ents in Institute of Electrical and Electronic Engineers (IEEE) Standard (Std) 279-1968, Proposed IEEE Criteria for Nuclear Power Plant Protection Systems, IEEE Std 279-1971, Criteria for Protection Systems for Nuclear Power Generating Stations, or the requirements in IEEE Std 603-1991, Criteria for Safety Systems for Nuclear Power Generating Stations, and the correction sheet dated January 30, 1995. Limerick received its construction permits on May 19, 1974.
IEEE Std 279-1971 is included in the licensing basis for Limerick.
o Clause 4.3 of IEEE Std 279-1971, Quality of Components and Modules states that:
Components and modules shall be of a quality that is consistent with minimum maintenance requirements and low failure rates. Quality levels shall be achieved through the specification of requirements known to promote high quality, such as requirements for design, for the derating of components, for manufacturing, quality control, inspection, calibration, and test.
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o Clause 4.16 of IEEE Std 279-1971, Completion of Protective Action Once It Is Initiated states, in part, that:
The protection system shall be so designed that, once initiated, a protective action at the system level shall go to completion.
Item 18 of SRM-SECY-93-087, Policy, Technical, and Licensing Issues Pertaining to Evolutionary and Advanced Light-Water Reactor (ALWR) Designs, describes the NRC position on defense against potential common-mode failures in digital I&C systems.
The regulatory guidance that the NRC staff plan to use for the audit activities are:
Standard Review Plan, Branch Technical Po sition (BTP) 7-19, Guidance on Software Reviews for Digital Computer Based Instrumentation and Control Systems.
Regulatory Guide 1.152, Criteria for Programmable Digital Devices in Safety-Related Systems of Nuclear Power Plants, which endorses, with some exceptions and clarifications, IEEE Std 7-4.3.2, IEEE Standard Criteria for Programmable Digital Devices in Safety Systems of Nuclear Power Generating Stations.
3.0 PURPOSE AND SCOPE
The NRC staff will review non-docketed analyses, plans, procedures, reports and records related to the CIM system to better understand the claim included in the LAR that the CIM system is not susceptible to a CCF. The audit scope includes the CIM systems design and testing attributes related to D3.
4.0 INFORMATION AND OTHER MATERIAL NECESSARY FOR THE REGULATORY AUDIT
For each documentation request identified below, please upload the requested documents between October 1 - 7, 2024, to an online portal (see special request section of this plan). The staff requests a walk-through of the uploaded documents during the entrance briefing to understand how the listed documents address the information requests described below. The documents to be uploaded should be grouped on the portal (e.g., by creating separate folders) by the headings used below (i.e., Extensive Testing, Diverse Design Attributes, and High Functional Reliability).
Extensive Testing
Documentation to demonstrate that the CIM system has undergone extensive testing addressing the testing criteria in Section 3.1.2 of BTP 7-19. At a minimum, this documentation should include:
(1) documentation of the specific tests that were performed for the CIM system, including the purpose/description of the test, test procedure, test results, test anomalies, and analysis of results
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(2) a cross-reference list or roadmap detailing the licensees reasoning regarding how it determined that the specific tests performed during development of the CIM devices proposed for use in the Limerick CIM-SRNC system meet each of the test criteria in Section 3.1.2 of BTP 7-19
(3) documentation that describes the technical basis for the conclusion that the testing performed during development of the CIM for the AP1000 reactor design is adequate to demonstrate that the BTP 7-19 testing criteria are met for the Limerick digital modernization project
(4) any references to the specific reports and summaries of the extensive testing process that support that technical basis reasoning
Document WNA-LI-00096-GEN, Evaluation of Common Cause Failure Susceptibility of Component Interface Module, that has been referenced several times in the Limerick LAR submittal documents, and any documents referenced within that document.
Reference documents listed within Section 2.2.2, CIM Extensive Testing, and within Table 2-2 Comparison of BTP 7-19 Test Criteria to CIM Testing, of Document WNA-AR-01074-GLIM, Limerick Generating Stations Units 1 & 2 Digital Modernization Project--Defense in Depth and Diversity Common Cause Failure Coping Analysis.
Diverse Design Attributes
Documentation to demonstrate that the CIM systems diverse design attributes are adequate to support the licensees claim that the CIM system is not susceptible to CCF. At a minimum, this should include detailed information relevant to the application-specific use of the CIM system in the Limerick project. This information should clearly demonstrate how diversity or other design measures of the CIM system that were implemented during the CIM systems development process are applicable to the Limerick project such that it supports the licensees claim of adequate diverse design attributes of the Limerick CIM system.
Documentation describing the reasoning used to determine that a field programmable gate array dual-core design for the Limerick CIM system, including the CIM and SRNC modules, ((
)) is considered adequate diversity for a complex highly safety significant system.
Documentation describing any analysis performed ((
)).
Documentation describing how (( )).
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Documentation describing the technical basis supporting the conclusion that the level of diversity created ((
)) is sufficient to eliminate CCF.
Documents referenced in the CIM Diversity Analysis, WNA-AR-01054-GEN, Revision 0, that are not already in ADAMS or have been submitted on the docket for Limerick.
High Functional Reliability
Section 2.2.1 of Document WNA-AR-01074-GLIM, Limerick Generating Stations Units 1 & 2 Digital Modernization Project--Defense in Depth and Diversity Common Cause Failure Coping Analysis, states ((
)). Provide documentation demonstrating the highly reliable operation of CIM system modules proposed for Limerick that are currently in service in any operating domestic or foreign AP1000 reactor safety applications, as described in Section 2.2.1 of Document WNA-AR-1074-GLIM.
Provide documentation describing the technical basis for the statements in Section 2.2.1 of the WNA-AR-1074-GLIM document. This may include documentation such as:
(1) quantitative reliability data for the CIM, such as the number of reactor operating hours achieved to date and the number and types of failures experienced by the CIM system modules proposed for Limerick
(2) documents with descriptions of module failures that have been reported or discovered during or after site acceptance testing and startup at any referenced AP1000 reactors
(3) documentation that describes the highly reliable operations and failures of the SRNC modules, if any
(4) documentation analyzing the root causes that were found to have contributed to the failures of the CIM and SRNC modules, and whether any of the types and root causes of these failures could be considered as a repeated failure that is of the same type of failures occurring among the many CIM and SRNC modules that have been produced and are in operation regardless of whether they occurred simultaneously with such similar failures within other modules.
Provide documentation summarizing the types and numbers of failures that have occurred in completed CIMs and SRNCs that were discovered during production testing prior to shipment, if any, and the root causes of those failures. Describe how those root causes have been addressed to prevent future failures from occurring in future production testing or post-production stages.
Based on a review of the material described above, the audit team may request additional documentation to support the audit.
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5.0 AUDIT TEAM
The members of the audit team are:
William Roggenbrodt, Electronics Engineer, Audit Team Leader David Rahn, Senior Electronics Engineer, Audit Team Member Samir Darbali, Senior Electronics Engineer, Audit Team Member Michael Marshall, Senior Project Manager, Audit Team Member
6.0 LOGISTICS
The audit will start on October 7, 2024, and is planned to end on October 25, 2024. The audit will be conducted remotely. During the audit entrance meeting, the NRC staff will provide an overview of the audit plan and discuss the objectives for the audit. During the exit meeting, the NRC staff will provide a summary of the NRC audit and its observations made during the audit.
If needed, the NRC staff will discuss the CIM systems design and testing attributes with Constellation and its contractors (e.g., Westinghouse). Meeting dates and times along with meeting topics will be requested by the audit team at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in advance. The NRC project managers will coordinate the date and time of the entrance, exit, and other audit meetings with Constellation.
The audit team will not remove any non-docketed documents or other materials from the online portal or location of the audit. If the audit team identifies information that requires docketing to support the basis for a regulatory decision concerning the review of the Limerick digital I&C LAR, the NRC staff will use requests for additional information to get the information placed on the docket.
Any changes in the audit logistics (e.g., audit exit date) will be coordinated and communicated through the NRC project managers assigned to the review of the Limerick digital I&C LAR.
7.0 SPECIAL REQUEST
The NRC staff would like access to the r equested documents through an online portal (i.e., electronic portal, ePortal, electronic reading room) that allows the audit team access via the internet. The following conditions associated with the online portal must be maintained throughout the duration that the audit team has access to the online portal:
the online portal will be password-protected, and separate passwords will be assigned to each audit team member
the online portal will be sufficiently secure to prevent the audit team from printing, saving, downloading, or collecting any information on the online portal
conditions of use of the online portal will be displayed on the login screen and will require acknowledgment by each audit team member
The licensee should ensure that any information uploaded to the online portal is appropriately marked regarding sensitivity (e.g., proprietary information). The NRC staff will confirm with the licensee the sensitivity of any information uploaded to the online portal.
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Username and password information should be provided directly to the NRC staff on the audit team. The NRC project managers assigned to the audit team will provide Constellation the names and contact information of the NRC staff who will be participating in the audit. All communications should be coordinated with one of the NRC project managers assigned to the Limerick digital I&C LAR review. The NRCs licensing project manager will inform the licensee via routine communications when the NRC staff no longer needs access to the portal (e.g., 30 days after the end of the audit).
8.0 DELIVERABLES
An audit summary, which may be public, will be prepared after the completion of the audit. If the NRC staff identifies information during the audit that is needed to support its regulatory decision, the NRC staff will issue requests for additional information to the licensee.
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Package: ML24263A001 Proprietary: ML24263A002 Non-Proprietary: ML24263A003 NRR-106 OFFICE NRR/DORL/LPL1/PM NRR/DORL/LPL1/LAiT NRR/DORL/LPL3 NRR/DEX/EICB/BC NAME MMarshall CAdams SLent FSacko (SDarabali for)
DATE 09/18/2024 09/19/2024 9/19/2024 09/18/2024 OFFICE NRR/DORL/LPL1/BC NRR/DORL/LPL1/PM NAME HGonzález MMarshall DATE 09/19/2024 09/27/2024