ML26026A155
| ML26026A155 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Peach Bottom, Clinton, Quad Cities, LaSalle  |
| Issue date: | 01/23/2026 |
| From: | Scott Wall Plant Licensing Branch III |
| To: | Rossi M Constellation Energy Generation |
| Wall, SP | |
| References | |
| EPID L-2026-LLA-0001 | |
| Download: ML26026A155 (0) | |
Text
From:
Scott Wall To:
Rossi, Matthew (Constellation Nuclear)
Cc:
Knowles, Justin W:(Constellation Nuclear)
Subject:
Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Eliminate Technical Specification for Automatic MSIV Closure on High Temperature (EPID No. L-2026-LLA-0001)
Date:
Friday, January 23, 2026 9:52:38 AM By letter December23,2025 (Agencywide Documents Access and Management System Accession No. ML25357A073), Constellation Energy Generation, LLC (CEG, the licensee) submitted license amendment requests for the following sites:
Clinton Power Station, Unit 1 Dresden Nuclear Power Station, Units 2 and 3 LaSalle County Station, Units 1 and 2 Peach Bottom Atomic Power Station, Units 2 and 3 Quad Cities Nuclear Power Station, Units 1 and 2
The proposed amendments would revise the Technical Specifications (TSs) at each facility to eliminate the requirement for automatic main steam line (MSL) isolation based on the temperature in the area around the MSL. In lieu of automatic isolation, a new specification, "Main Steam Line (MSL) Area Temperature," is proposed that requires manual action when the MSL area temperature is above the limit.
The purpose of this e-mail is to provide the results of the NRC staffs 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 NRC 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 10 CFR 50.90, an amendment to the 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.
The NRC staff has reviewed your application and concluded that it provides technical information in sufficient detail to enable the staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the request in terms of regulatory requirements and the protection of public health and safety and the environment.
Given the lesser scope and depth of the acceptance review, as compared to the detailed technical review, there may be instances in which issues that impact the staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. You will be advised of any further information needed to support the staffs detailed technical review by separate correspondence.
The NRC staff has evaluated precedence related to this request. For this request, the staff used the Graded Estimate Method (GEM) for licensing actions, which was discussed with industry during a public workshop on August 5, 2025 (ML25217A212). The NRC staff considers the application to be a review that meets the GEM Typical review definition.
Based on the GEM approach, our estimate for this review is 131 hours0.00152 days <br />0.0364 hours <br />2.166005e-4 weeks <br />4.98455e-5 months <br /> and the staff
expects to complete the review by June 30, 2026 (5.3 months). Historically, these amendment revisions have been completed as plant-specific reviews. By accepting the application as multi-site Fleet review, if achieved, these estimates represent approximately an 81% reduction in total estimated hours and a 12% reduction in review time. These estimates are based on the NRC staffs initial review of the application, and they could change, due to several factors including requests for additional information, and unanticipated addition of scope to the review. Additional delay may occur if the submittal is provided to the NRC in advance or in parallel with industry program initiatives or pilot applications.
These estimates are based on the NRC staffs initial review of the application, and they could change, due to several factors including requests for additional information, unanticipated addition of scope to the review, and review by NRC advisory committees or hearing-related activities.
If you have any questions, please contact me at (301) 415-2855 or e-mail at Scott.Wall@nrc.gov.
Scott P. Wall Senior Project Manager Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301.415.2855 Scott.Wall@nrc.gov