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In May 2025, EnergySolutions and WEC Energy Group announced their plans to explore new nuclear energy generation at Kewaunee, where a 566 MWe (net) pressurised water reactor operated from 1974 to 2013. EnergySolutions acquired the plant - which is undergoing decommissioning - from Dominion Energy in 2022.
EnergySolutions said the submittal of its Notice of Intent to the US Nuclear Regulatory Commission earlier this month was an important next step as the companies continue to explore new nuclear generation at the Kewaunee site. Applications for an Early Site Permit, Construction Permit, or Combined Licence are currently being evaluated, it said, adding that the decommissioning and decontamination activities at the site will be "closely coordinated with the application and associated support activities".
An early site permit certifies that a site is suitable for the construction of a nuclear power plant from the point of view of site safety, environmental impact and emergency planning, but does not specify the choice of technology. The permit is valid for 10 to 20 years, renewable for an additional 10 to 20 years.
The company said it is carrying out a structured, multi-phase project that includes initial planning and scoping activities. In-depth studies will support the application to demonstrate the site's suitability for new nuclear construction. This is a prerequisite to the development and securing of NRC approvals for this project, it added.
"This is an important milestone in moving towards the next generation of nuclear power in Wisconsin in partnership with WEC Energy Group," EnergySolutions President and CEO Ken Robuck said. "As communicated when we announced this initiative in May of 2025, the need for reliable, carbon-free power has never been greater. We have assembled an experienced team that brings environmental compliance, nuclear licensing and project management expertise to this project at a time new nuclear generation in Wisconsin is essential."
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