ML25199A161
| ML25199A161 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 07/22/2025 |
| From: | Wetzel B Plant Licensing Branch III |
| To: | Constellation Energy Generation |
| Wetzel, B | |
| References | |
| EPID L-2025-LRM-0079 | |
| Download: ML25199A161 (4) | |
Text
July 22, 2025 LICENSEE:
Constellation Energy Generation, LLC FACILITIES: Clinton Power Station, Unit No. 1
SUBJECT:
SUMMARY
OF JUNE 18, 2025, MEETING WITH CONSTELLATION ENERGY GENERATION, LLC, RELATED TO THE PLANNED LICENSE AMENDMENT REQUEST FOR CLINTON POWER STATION, UNIT NO. 1 (EPID L-2025-LRM-0079)
On June 18, 2025, an observation public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Constellation Energy Generation, LLC (Constellation, the licensee) via webinar. The purpose of the meeting was for the NRC staff to discuss a proposed license amendment request (LAR) for Clinton Power Station, Unit No. 1 (Clinton). The LAR would update the methodology used at Clinton for performing reactor protection system Main Steam Isolation Valve (MSIV) closure response time testing. The meeting notice and agenda dated June 12, 2025, are available in the Agencywide Documents Access and Management Systems (ADAMS) Accession No. ML25163A187. The enclosure to this summary contains a list of attendees.
The licensee presented information from the slides contained in ML25182A286 to provide an overview of the proposed change to revise the Clinton Updated Safety Analysis Report (USAR) to approve current MSIV closure Reactor Protection System response time testing as an NRC-approved methodology.
During the presentation, the NRC staff and Constellation representatives discussed the following:
The NRC staff confirmed that the monitored parameter for the testing is the MSIV stem position.
The NRC staff asked if the licensee could include a diagram depicting the test configuration in their application. The licensee representative confirmed that they would include a diagram in their submittal.
The NRC staff asked questions related to individual components within the testing circuitry and response times associated with those components. The licensee confirmed that they measure the component response times independently and then apply the longest time for the circuitry.
The NRC staff asked for specifics related to the design of the limit switch, including brand and model, which the licensee provided.
The NRC staff asked questions pertaining to the calibration procedure and frequency of both calibration and functional testing, noting that there could be degradation over time. The licensee responded and agreed to provide details related to calibration and functional test frequency in their application, including how the calibration procedure will monitor for degradation.
There were no members of the public in attendance. Public meeting feedback forms were not received. No regulatory decisions were made at this meeting.
Please direct any inquiries to me at 301-415-5223, or Beth.Wetzel@nrc.gov.
Sincerely,
/RA/
Beth Wetzel, Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-461
Enclosure:
List of Attendees cc: Listserv
Enclosure LIST OF ATTENDEES JUNE 18, 2025, PUBLIC MEETING WITH CONSTELLATION ENERGY GENERATION, LLC PLANNED LICENSE AMENDMENT REQUEST FOR CLINTON POWER STATION, UNIT NO. 1 REGARDING MAIN STEAM ISOLATION VALVE REACTOR PROTECTION SYSTEM RESPONSE TIME TESTING METHODOLOGY Name Organization Beth Wetzel U.S. Nuclear Regulatory Commission (NRC)
David Rahn NRC Youssef Rokes NRC Nicholas Lien Constellation Energy Generation, LLC (CEG)
Dale Shelton CEG Mark Humphrey CEG David Livingston CEG Derek Hillinger CEG Aaron Hessenkemper CEG Kenneth Nicely CEG
ML25199A161 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DORL/LPL3/BC NRR//LPL3/PM NAME BWetzel SLent IBerrios BWetzel DATE 07/21/2025 07/21/2025 07/22/2025 07/22/2025