ML24162A221

Summary of April 11, 2024, Closed Meeting with Constellation Energy Generation, LLC, Related to the LAR to Support Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (EPID L-2022-LLA-

ML24162A221
Person / Time
Site:	Limerick
Issue date:	06/24/2024
From:	Marshall M Plant Licensing Branch 1
To:	Constellation Energy Generation
Klett, AL
Shared Package
ML24162A223	List: ML24162A221
References
EPID L-2022-LLA-0140
Download: ML24162A221 (4)

Text

June 24, 2024 LICENSEE:

Constellation Energy Generation, LLC FACILITY:

Limerick Generating Station, Units 1 and 2

SUMMARY

OF APRIL 11, 2024, CLOSED MEETING WITH CONSTELLATION ENERGY GENERATION, LLC, RELATED TO THE LICENSE AMENDMENT REQUEST TO SUPPORT REPLACEMENT OF EXISTING SAFETY-RELATED ANALOG CONTROL SYSTEMS WITH A SINGLE DIGITAL PLANT PROTECTION SYSTEM (EPID L-2022-LLA-0140)

On April 11, 2024, a closed meeting was held between the U.S. Nuclear Regulatory Commission (NRC), and representatives of Constellation Energy Generation, LLC (Constellation). The purpose of the meeting was for the NRC staff to discuss with Constellation a license amendment request for Limerick Generating Station, Units 1 and 2 (Limerick) dated September 26, 2023 (Non-Publicly Available); as supplemented by letters dated August 12, 2022 (Agencywide Documents Access and Management System Accession (ADAMS)

(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), and November 21, 2023 (ML23325A206).

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 the main control room. The meeting notice dated April 9, 2024, is available in ADAMS at Accession No. ML24100A715.

The Constellation representatives and the NRC staff discussed the configuration and functionality of the component interface module intended for use in the Limerick digital modernization project. The discussions centered around questions sent to the licensee prior to the meeting (Non-Publicly Available).

Please direct any inquiries to me at 301-415-2871 or michael.marshall@nrc.gov.

Sincerely,

/RA/

Michael L. Marshall, Jr., Senior Project Manager Plant Licensing Branch I Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosure:

List of Attendees cc: Listserv

Enclosure LIST OF ATTENDEES APRIL 11, 2024, MEETING WITH CONSTELLATION ENERGY GENERATION, LLC DIGITAL INSTRUMENT AND CONTROL RELATED AMENDMENT LIMERICK GENERATING STATION, UNITS 1 AND 2 Nuclear Regulatory Commission Christina Antonescu Samir Darbali Hipo González Robert Kuntz Michael Marshall Bill Roggenbrodt Fanta Sacko Constellation Energy Generation, LLC George Bonanni Michael Foote Michael Henry Steven Hesse Kayla Marriner Frank Mascitelli Dave Molteni Mark Samselski Gerald Segner Constellation Energy Generation, LLC Contractor Matt Shakun Steve Merkiel Warren Odess-Gillett Robert Phillips Stephen Seaman Hasan Uyar

Package: ML24162A223 Meeting Notice: ML24100A715 Meeting Summary: ML24162A221 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DORL/LPL1/BC NRR/DORL/LPL3/PM NAME MMarshall KZeleznock HGonzález MMarshall DATE 06/10/2024 06/11/2024 06/24/2024 06/24/2024