Letter Sequence Draft RAI |
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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, Request, Request
- Acceptance, Acceptance, Acceptance, Acceptance, Acceptance
- Supplement, Supplement, Supplement, Supplement, 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, 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, Meeting, Meeting, Meeting, Meeting
Results
Other: ML22353A632, ML23032A244, ML23187A096, ML23241A945, ML24093A091, ML24208A159, ML24243A048, ML24263A003, ML24310A260, ML24361A129, ML25094A145, ML25223A077, ML26034C213
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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
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
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
ML22312A4402022-11-10010 November 2022
Public Meeting with Constellation About Acceptance Review: Status of NRC Staffs Acceptance Review of the Limerick 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
ML22319A0012022-11-14014 November 2022
Constellation Energy Generation, LLCs 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
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
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
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
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
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
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
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
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
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
[Table View] |
Text
From:
Michael Marshall To:
Rickey, Ashley:(Constellation Nuclear)
Cc:
Wendi Para (wendi.para@constellation.com); Robert Kuntz
Subject:
Limerick Generating Station, Units 1 and 2 - Request for Additional Information and Draft Requests for Confirmatory Information Regarding Limerick Digital Instrumentation and Controls License amendment Request (EPID L-2022-LLA-0140)
Date:
Wednesday, February 5, 2025 10:52:00 AM Hello Ashley,
By letter dated September26, 2022 (Agencywide Documents Access and Management System Accession No. ML22269A569; non-public), as supplemented by letters dated August12, 2022 (ML22224A149), November29, 2022 (ML22333A817), February8, 2023 (ML23039A141), February15, 2023 (ML23046A266), March30, 2023 (ML23089A324),
April5, 2023 (ML23095A223), June26, 2023 (ML23177A224), July31, 2023 (ML23212B236), September12, 2023 (ML23255A095), October30, 2023 (ML23303A223),
November21, 2023 (ML23325A206), January26, 2024 (ML24026A296), February26, 2024 (ML24057A427), March7, 2024 (ML24067A294), March18, 2024 (ML24057A426),
April23, 2024 (ML24114A322), May3, 2024 (ML24124A043), June13, 2024 (ML24165A264), June14, 2024 (ML24166A114), and June28, 2024 (ML24180A157)
Constellation Energy Generation, LLC (Constellation; the licensee) submitted license amendment requests (LAR) for Limerick Generating Station, Units 1 and 2 (Limerick). The supplement dated September12, 2023 replaces in its entirety the original LAR dated September26, 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 September12, 2023, the content of the replacement and the original are the same.
The amendment requests would change both the design and technical specifications to permit the use of a new single digital instrumentation and controls 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 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, eliminate several surveillance requirements, and allow the use of automated operator aids (or automated controls) from main control room.
The NRC staff has determined that additional information is needed to complete its review of the Limerick digital I&C LAR. The request was sent to Constellation on February 5, 2025 using the BOX service. This request was discussed with Constellation on February 5, 2025.
Constellations response shall be provided to the NRC by April 7, 2025. Request for additional information numbering starts from the last RAI number that was used in RAIs sent to Constellation by NRC email dated January 3, 2025.
Best Regards, Michael L. Marshall, Jr.
Senior Project Manager
Plant Licensing Branch I
Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
301-415-2871
Official Use Only - Proprietary Information Official Use Only - Proprietary Information causes have been addressed to prevent future failures from occurring in future production testing or post-production stages.
