ML24344A227

Summary of Partially Closed Observation Meeting with Constellation Energy Generation, LLC Regarding Peach Bottom Atomic Power Station, Units 2 and 3 Digital Upgrade of the Emergency Core Cooling System Compensated Level System

ML24344A227
Person / Time
Site:	Peach Bottom   (DPR-044, DPR-056)
Issue date:	12/12/2024
From:	Robert Davis Plant Licensing Branch 1
To:	Constellation Energy Generation
Klett, AL
Shared Package
ML24345A031	List: ML24344A227
References
EPID L-2024-LRM 0009
Download: ML24344A227 (1)

Text

December 12, 2024 LICENSEE:

Constellation Energy Generation, LLC FACILITY:

Peach Bottom Atomic Power Station, Units 2 and 3

SUMMARY

OF NOVEMBER 22, 2024, PARTIALLY CLOSED OBSERVATION MEETING WITH CONSTELLATION ENERGY GENERATION, LLC REGARDING PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 DIGITAL UPGRADE OF THE EMERGENCY CORE COOLING SYSTEM COMPENSATED LEVEL SYSTEM (EPID L-2024-LRM-0009)

On November 22, 2024, the U.S. Nuclear Regulatory Commission (NRC) staff held a partially closed observation meeting with Constellation Energy Generation, LLC (Constellation, the licensee) at NRC Headquarters in Rockville, Maryland. The purpose of the meeting was for Constellation and the NRC staff to discuss a proposed license amendment request (LAR) regarding a digital instrumentation and controls upgrade to the emergency core cooling system (ECCS) compensated level system for Peach Bottom Atomic Power Station, Units 2 and 3 (Peach Bottom). The meeting notice and agenda, dated November 15, 2024, are available in the NRCs Agencywide Documents Access and Management System (ADAMS) at Accession No. ML24326A047. The enclosure to this summary contains a list of attendees. The licensee prepared presentation slides which are available in ADAMS at ML24325A570.

During the meeting, Constellation discussed a proposed schedule for the planned LAR, including the planned time frame for supplemental information. The licensee confirmed that the only supplement currently planned is the equipment qualification test report summary. The licensee discussed the changes to the facility with the LAR including expanded maintenance and diagnostic testing. The NRC staff requested that the licensee include in its application, the architecture of the monitoring and tuning system with its diagnostic features. Continuing the discussion on changes to the plant interface, the NRC staff asked who is providing the cabinets and the Curtiss-Wright representative responded that Curtiss-Wright will be supplying the cabinets. The licensee mentioned that there will be no changes to Peach Bottoms technical specifications.

The NRC staff asked Constellation to explain their evaluation using the process described in Title 10 of the Code of Federal Regulations (10 CFR) Section 50.59 Changes, tests, and experiments which allows licensees to make changes to their facility without prior NRC approval. The licensee responded that because they are making changes to a structure, system, or component (SSC) that affects the design function of the SSC, they screened into the 50.59 process. Evaluating the change against the criteria in 10 CFR 50.59(c)(2), the licensee determined that the change described in the LAR would result in more than a minimal increase in the likelihood of occurrence of a malfunction of an SSC important to safety previously evaluated in the final safety analysis report (as updated), as described in 10 CFR 50.59(c)(2)(ii).

Therefore, Constellation will be applying for a license amendment to make changes to the ECCS system.

During the discussion of deviations from the RadICS topical report, the licensee mentioned the only equipment deviation is the use of 2-meter cables instead of the 20-meter cables included in the topical report. The NRC staff asked for more information on these cables and the licensee mentioned they are manufactured by RadICS and will be commercially dedicated by RadICS as well as included in Curtiss-Wrights quality assurance (QA) program.

The NRC staff did not make any regulatory decisions at the meeting. Members of the public were in attendance. Public Meeting Feedback forms were not received. The NRC received one comment congratulating the staff on the helpfulness of dialogue throughout the meeting.

Please direct any inquiries to me at (301) 415-0805, or Rachael.Davis@nrc.gov.

/RA/

Rachael Davis, Project Manager Licensing Data Analytics, Tools, and Assessments Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278

Enclosure:

List of Attendees cc: Listserv

Enclosure LIST OF ATTENDEES NOVEMBER 22, 2024, MEETING WITH CONSTELLATION ENERGY GENERATION, LLC PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 Name Organization Aaron Armstrong U.S Nuclear Regulatory Commission (NRC)

Christina Antonescu NRC Clinton Hobbs NRC Deanna Zhang NRC En De Chen NRC Eric Benner NRC Fanta Sacko NRC Isaac Wang NRC Jack Zhao NRC Michael Marshall NRC Neal Sheehan NRC Rachael Davis NRC Rachel Qian NRC Samir Darbali NRC Sarah Elkhiamy NRC William Roggenbrodt NRC David Peiffer Constellation Energy Generation, LLC (Constellation)

John Hopson Constellation Pablo Guardado Constellation Preeti Furtado Constellation Steve Dragovich Constellation Stephen Flickinger Constellation John Schrage Sargent Lundy Mike Lewis Sargent Lundy Pareez Golub Sargent Lundy Rylee Runyon Sargent Lundy Marty Murphy Curtiss-Wright Michael Kosman Curtiss-Wright Robert Ammon Curtiss-Wright Alfred Hyde Member of the public - Dominion Energy Mary Miller Member of the Public - Dominion Energy

Package: ML24345A031 Meeting Notice: ML24326A047 Meeting Summary (Non-Proprietary): ML24344A227 Meeting Slides: ML24325A570 OFFICE NRR/DORL/LDATA/PM NRR/DORL/LPL1/LA NRR/DORL/LPL1/BC(A)

NAME RDavis KEntz HGonzález (RGuzman for)

DATE 12/6/2024 12/11/2024 12/12/2024