Advanced Reactor Highlights - 2025

On March 31, Long Mott Energy, LLC, a wholly owned subsidiary of The Dow Chemical Company, submitted a construction permit application for the Long Mott Generating Station (LMGS) which would be sited in Calhoun County, Texas. The LMGS project would be used to demonstrate the X-energy high-temperature gas-cooled reactor technology and is supported by the Department of Energy’s Advanced Reactor Demonstration Program. The NRC staff’s acceptance review of the application is ongoing. Learn more.

On February 26, the NRC staff issued a letter to inform US SFR Owner, LLC (USO), a wholly owned subsidiary of TerraPower, LLC, of the completion of the draft safety evaluation (SE) with open items for the Kemmerer Power Station Unit 1 construction permit application. Additionally, the letter discussed that the NRC staff is targeting completion of the final SE by June 2026, ahead of the August 2026 date communicated in the original schedule letter.

On February 24, the NRC staff published a new webpage specific to microreactors. The webpage also describes Regulatory Activities that staff is pursuing related to microreactors, including the recently issued Microreactor Integration Plan. Learn more.

On February 3, the NRC staff published a new webpage providing a guide for prospective applicants. The webpage was designed to provide information, guidance, and support for applicants who are currently in the development process of a nuclear reactor design or reactor-related project that have not yet contacted the NRC. The guide discusses the steps necessary for an applicant to take before reaching out to the NRC and provides the appropriate way to contact the NRC to start communications about a project. These pages are also a resource for those who have contacted the NRC and are looking for additional details on specific topics. Learn more.