Letter Sequence Acceptance Review |
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Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance, Acceptance, Acceptance, Acceptance, Acceptance
- Supplement, Supplement, Supplement, Supplement
Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
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MONTHYEARML22010A0692022-01-10010 January 2022 Jan 11 2022 LGS Digital Modernization Pre-submittal Meeting Slides Project stage: Request ML22046A0742022-02-14014 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 PMNS20220271, Meeting with Constellation Energy Generation, LLC Regarding Defense-in-Depth and Diversity Common Cause Failure Coping Analysis Request for Limerick Generating Station, Units 1 and 22022-03-17017 March 2022 Meeting with Constellation Energy Generation, LLC Regarding Defense-in-Depth and Diversity Common Cause Failure Coping Analysis Request for Limerick Generating Station, Units 1 and 2 Project stage: Request ML22084A1142022-03-25025 March 2022 Supplement to Review of Limerick Generating Station Defense in Depth and Diversity Common Cause Failure Coping Analysis, WNA-AR-01074-GLIM-P, Rev 1, February 2022 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 ML23236A5132023-08-31031 August 2023 Summary of Meeting with Constellation Energy Generation, LLC Regarding Digital Modernization License Amendment Request Project stage: Meeting 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 Project stage: Other ML24026A2922024-01-26026 January 2024 Request for Additional Information Regarding Limerick Digital Instrumentation and Controls License Amendment Request Project stage: RAI 2023-01-20
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Category:Acceptance Review Letter
MONTHYEARML23086A0822023-03-27027 March 2023 Acceptance of Requested Licensing Action for Exemption Request to Support Digital Modernization Project Installation 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 ML22320A1132022-11-21021 November 2022 Generation Station, Units 1 and 2 - Supplemental Information Needed for Acceptance of Digital Instrumentation and Controls License Amendment Requests ML22112A2152022-03-28028 March 2022 Limerick_Acceptance Review TS Change to Correct Nonconservative Technical Specification Table 3.3.3-1 ML21140A0842021-05-19019 May 2021 Acceptance of Requested Licensing Action Revision to Appendix C License Conditions in Accordance with the Requirements of 10 CFR 50.69 (E-mail) ML21111A0312021-04-20020 April 2021 Application to Modify 50.69 Categorization to Implement an Alternate Defense-in-Depth Categorization Process, an Alternate Pressure Boundary Categorization Process, and an Alternate Seismic Tier 1 Categorization Process ML21077A1772021-04-0808 April 2021 Withdrawal of Requested Exemption from Certain Requirement in 10 CFR 50.55a (Epids L-2021-LLE-0014, 0015, & 0016) ML20304A1432020-10-30030 October 2020 Acceptance Review: Relocation of Pressure and Temperature Limit Report ML20273A1582020-09-29029 September 2020 Acceptance Review: to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements ML20268B2362020-09-24024 September 2020 Acceptance Review: Relief Requesting Residual Heat Removal Heat Exchanger Category C-A and C-B Examinations ML20092G8352020-04-0101 April 2020 Acceptance Review - TS Change 3.10.8, Inservice Leak - TSTF-484 ML20091N0492020-03-27027 March 2020 Acceptance Review: TS Change for Testing of the SRVs to Retain the Frequency and Associated Relief Requests in the IST Program (EPIDs L-2020-LLA-0052 and L-2020-LLA-0043) ML19357A0892019-12-23023 December 2019 Acceptance Review: Technical Specification 40.5 Requirements to Reflect the Allowance Provided in 10 CFR 50.69(b)(1)(v) to Perform Alternative Treatement of SSC J(Epid: L-209-LLA-263) ML19248B7322019-09-0505 September 2019 Letter to R. Libra Alternative Request Pertaining to Dry Shielded Canisters Equipped with Boral Neutron Absorber Plates - Accepted for Review ML19239A1552019-08-26026 August 2019 Acceptance Review for Limerick - Relocation of Chlorine and Toxic Gas Detection System TSs License Amendment Request ML19030A1472019-01-30030 January 2019 Supplemental Information Needed for Acceptance of Requested Licensing Action to Adopt Risk-Informed Completion Times in Accordance with TSTF-505, Revision 2 ML18295A5312018-10-22022 October 2018 Acceptance Review: Relief Request I4R-08, Revision 1 for the Fourth Inservice Inspection Interval of Limerick Generating Station (LGS) Units 1 and 2 ML18052B0762018-02-21021 February 2018 Acceptance Review: Revise Technical Specifications to Lower the Minimum Standby Liquid Control System Pump Flowrate ML17234A5282017-08-25025 August 2017 Acceptance of Requested Licensing Action Adoption of Title 10 of the Code of Federal Regulations Section 50.69 ML17137A1542017-05-16016 May 2017 Acceptance Review for Relief Request Associated with Reactor Pressure Vessel Nozzle Repairs ML17009A3792017-01-0909 January 2017 Acceptance of Requested Licensing Action Regarding Amendment-Partial Length Fuel Rod Burn-up ML17009A2932017-01-0909 January 2017 Acceptance of Requested Licensing Action Regarding Amendment-Partial Length Fuel Rod Burn-up ML17003A3292017-01-0303 January 2017 Acceptance Review - Limerick Unit 2 - Safety Limit Minimum Critical Power Ratios ML16319A1262016-11-14014 November 2016 Acceptance Review - Limerick 1 and 2 - Relief Request GVRR-8 ML16237A0362016-08-24024 August 2016 Acceptance Review: Limerick 1 & 2 - TS ISI and IST Program Requirements (CACs MF8193 and MF8194) ML16055A3692016-02-24024 February 2016 Acceptance Review: Limerick 1 & 2 - Reduce Steam Dome Pressure Amendment Request (CACs MF7263 and MF7264) ML15341A0232015-12-0707 December 2015 Acceptance Review for CAC MF7101 - Limerick Unit 1 - Safety Limit Minimum Critical Power Ratio ML15120A0812015-04-30030 April 2015 Acceptance Review for TACs MF6094 & MF6095 - Limerick Units 1 and 2 - Submittal of Relief Request to Use Code Case OMN-18 ML14329B2982014-11-25025 November 2014 Email- Acceptance Review for TACs MF5133 & MF5134 - Limerick Units 1 and 2 - Add New LCOs 3.0.5 and 3.0.6 ML14212A3802014-07-31031 July 2014 Acceptance Review for TACs MF4412 & MF4413 - Limerick Units 1 and 2 - TSTF-523, Generic Letter 2008-01 - Managing Gas Accumulation ML13101A0482013-04-11011 April 2013 Acceptance Review for TACs ME1399 & ME1400 - Limerick Units 1 and 2 - Eliminate Certain TS Reporting Requirements ML12331A0382012-11-26026 November 2012 Acceptance Review for License Amendment Request to Relocate MOV TOL Protection to TRM ML1119403082011-07-13013 July 2011 Acceptance Review of License Amendment Request to Include an Alternate Method of Verifying Drywell Leakage - TAC Nos ME6521 & ME6522 ML1116804112011-06-17017 June 2011 Acceptance Review for Exelon Threshold Determination Request (TAC ME6269 - ME6287) ML1113101262011-05-11011 May 2011 Acceptance Review of Limerick License Amendment Request Regarding TSTF-514, RCS Leakage Detection Instrumentation, TAC Nos. ME5993 & ME5994 ML1021502822010-08-0303 August 2010 Acceptance Review of Limerick LAR Regarding HPCI Dt Isolation Setpoint Change - TACs ME4171/ME4172 ML1008800852010-07-21021 July 2010 Fleet - Acceptance Review Implementation of Emergency Action Level Schemes Developed from NEI 99-01m Rev. 5 ML1005400432010-02-22022 February 2010 Acceptance Review of Limerick Relief Request I3R-13, Pressure Testing of Primary Containment Gas Piping ML0924700432009-09-0303 September 2009 3 Acceptance Review Results Request to Use Specific Provisions from a Later Edition of the ASME Boiler and Pressure Vessel Code 2023-03-27
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December 9, 2022 Mr. 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 GENERATION STATION, UNIT NOS. 1 AND 2 - ACCEPTANCE OF REQUESTED LICENSING ACTION RE: REPLACEMENT OF EXISTING SAFETY-RELATED ANALOG CONTROL SYSTEMS WITH A SINGLE DIGITAL PLANT PROTECTION SYSTEM (EPID L-2022-LLA-0140)
Dear Mr. Rhoades:
By letter dated September 26, 2022 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML22269A569), as supplemented by letters dated August 12, 2022 (ML22224A149), and November 29, 2022 (ML22333A817), Constellation Energy Generation, LLC (Constellation), submitted license amendment requests (LARs) for Limerick Generation Station, Units 1 and 2 (Limerick). The proposed 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 the automatic isolation function for the turbine enclosure main steam line tunnel temperature high indication, eliminate several surveillance requirements, and allow the use of automated operator aids (or automated controls) from main control room.
The purpose of this letter is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staff (staff) acceptance review of these amendment requests. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.
Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations (10 CFR), an application for an amendment to a license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.
D. Rhoades The staff is accepting your application for docketing. While the staff has concluded that it does not include sufficient technical information in certain limited areas identified by Constellation (discussed further below), it is accepting the application for docketing because Constellation has: 1) provided a sufficiently detailed description of the supplemental information and a schedule for when the supplemental information will be provided to the NRC; and 2)provided sufficient information in the remaining areas.
Supplemental Information Identified by Constellation Necessary to Complete Review In its LAR, Constellation described supplemental information in certain limited areas that either was not included in the LAR or needed to be updated at a later time. Constellation also identified the schedule for submission of this supplemental information. The table below lists this supplemental information and the submission schedule proposed by Constellation.
Supplemental Information Date of Submittal Human Factors Engineering Conceptual Verification Results Summary February 9, 2023 Report HFE Preliminary Verification Results Summary Report March 30, 2023 Seismic Equipment Qualification Summary Report, Revision 0 April 18, 2023 Environmental Equipment Qualification Summary Report, Revision 1 May 3, 2023 Electromagnetic Compatibility Equipment Qualification Summary Report, June 16, 2023 Revision 2 Updated WNA-DS-04900-GLIM-P, LGS PPS System Design February 17, 2023 Specification (SyDS), Revision 3 Other Potential Information Insufficiencies Identified by the Staff During its Acceptance Review and their Resolution The staff identified three potential information insufficiencies during its acceptance review and discussed them at a public meeting on November 10, 2022 (ML22327A019):
- 1) the available information explaining the design and use of the component interface module (CIM) priority module
- 2) the basis for an exception identified by Constellation to Clause 5.6.1 in Institute of Electrical and Electronics Engineers Standard 603-1991 (IEEE-606-1991) regarding independence between redundant portions of a safety system for the plant protection system; and
- 3) the basis for an exception identified by Constellation to IEEE-603-1991 Clauses 6.6 and 7.4 regarding operating bypasses.
Item 1: CIM Priority Module After the public meeting, the staff concluded that item 1 was an information insufficiency that needed to be addressed before the staff could accept the LAR. In a letter dated November 21, 2022 (ML22320A113), the staff requested that Constellation supplement the application with information on the CIM. Constellation submitted a letter dated November 29, 2022 (ML22333A817), to provide a technical description of the CIM design for the priority functions being used in the proposed plant protection system.
D. Rhoades This letter transmitted the Westinghouse Technical Report WCAP-17179, Revision 6, and identified the section applicable to the Limerick LAR. Based on this information, the staff has concluded that this information is sufficient to support acceptance of the LAR.
Items 2 and 3: Exceptions to IEEE-603-1991 At the public meeting, the staff noted that the IEEE-603-1991 clauses that Constellation is taking exception to correspond to similar requirements in IEEE Standard 279-1968 that are required to be met for proposed protection systems at Limerick in accordance with 10 CFR 55.55a(h)(2). Taking exception to the clauses in IEEE-603-1991 would seem to indicate that the system planned for Limerick would not comply with 10 CFR 55.55 a(h)(2), in which case the system could not be approved without additional licensing actions (e.g., requesting an exemption or alternative request). As justification for the exception, the LAR references, and Constellation discussed at the public meeting, Limericks updated final safety analysis report (UFSAR) and emergency operating procedures. However, the staff could not identify a clear regulatory basis for the exceptions in these references during the acceptance review period.
While follow up is necessary to determine if the licensing basis documents provide sufficient justification, the staff concluded that resolution of these issues was not necessary to support acceptance of the LAR because Constellation had provided a justification for the exceptions.
Because the staff has not been able to verify the adequacy of the justification through its review of the information provided to date, this issue is a high priority licensing concern that needs to be addressed by Constellation. The staff will discuss this issue further at the public meeting with Constellation scheduled for December 15, 2022, to identify an appropriate regulatory path forward. Possible paths include the staff issuing a request for additional information as part of its detailed review of the LAR, or Constellation providing supplemental information or an additional licensing action requesting an exemption or alternative request.
Review Schedule and Level of Effort Based on the information provided in your license amendment requests, including the schedule for when supplemental information will be provided, the NRC staff has estimated that these licensing requests will take approximately 7000 hours0.081 days <br />1.944 hours <br />0.0116 weeks <br />0.00266 months <br /> to complete. The NRC staff expects to complete this review by March 11, 2024. The estimated completion date accounts for briefings to the Advisory Committee on Reactors Safeguards (ACRS) on the NRC staff review of the amendment requests. If there are emergent complexities or challenges in the NRC staffs review that would cause changes to the initial forecasted completion date or significant changes in the forecasted hours, the reasons for the changes, along with new estimates, will be communicated during the routine interactions with the assigned NRC project manager and documented in subsequent correspondence to Constellation.
The estimates for level of effort and completion schedule are based on the NRC staffs initial review of the application and the licensees schedule for providing the information missing from the initial application. These estimates are subject to change if there are delays in submitting the information described in Constellations letter dated September 26, 2022, or significant changes in the proposed digital system described in the initial application. Additionally, the estimates could change due to other factors including requests for additional information (especially, second round requests for additional information), unanticipated addition of scope to the review, and hearing-related activities or additional reviews by the ACRS.
D. Rhoades Lastly, NRC staff cannot complete its review of the Limerick license amendment request without receiving the remaining supplemental information that Constellation has identified and indicated that it would provide.
If you have any questions, please contact the NRC Project Managers for these license amendment requests, Michael Marshall at Michael.Marshall@nrc.gov or (301) 415-2871, and Bhagwat BP Jain at Bhagwat.Jain@nrc.gov or (301) 415-6303.
Sincerely,
/RA/
Bhagwat P Jain, Senior Project Manager Plant Licensing Branch 4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353 cc: Listserv
ML22339A064 OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL1/LA NRR/DEX/EICB/BC NAME BJain KZeleznock (KEntz for) MWaters DATE 12/02/2022 12/05/2022 12/05/2022 OFFICE NRR/DORL/LPL1/BC NRR/DORL/LPL4/PM NAME HGonzález BJain DATE 12/07/2022 12/09/2022