US firm’s 15 MW micro nuclear reactor advances toward deployment with landmark filing

The firm is leveraging its new construction permit application to pioneer a fleet-scale manufacturing model of micro nuclear reactor.

NANO Nuclear Energy has reached a major milestone in the race for advanced nuclear deployment. It has announced that a Construction Permit Application has been officially submitted to the US Nuclear Regulatory Commission for its KRONOS MMR microreactor.

The application was formally submitted by The Grainger College of Engineering at the University of Illinois Urbana-Champaign , NANO Nuclear’s partner for the deployment of the KRONOS MMR on the university’s campus.This submission makes NANO Nuclear the first microreactor developer and the third Generation IV advanced reactor developer to reach the construction permit application stage. This step is a movement toward the eventual commercial use of the technology.“It is where advanced nuclear projects begin to separate into those that are ready for execution and those still requiring significant R&D efforts,” said Florent Heidet, Chief Technical Officer of NANO Nuclear Energy.Prepared for deployment at scaleThe application process shifts the KRONOS MMR from the engineering design phase to the licensing and construction phase. The plan involves building the reactor on the University of Illinois campus. This submission indicates that the system is being prepared for deployment at scale rather than serving as a research demonstration. The company plans to use the feedback and data from the regulatory process to improve its future assembly, siting, and deployment methods. These improvements are intended to help the company navigate future licensing and multi-unit projects in a more efficient manner.“We are now firmly on the path toward constructing, demonstrating, and ultimately deploying our reactor technology at scale,” added Heidet.Kronos micro nuclear reactor for practical applicationsNANO Nuclear focuses on creating scalable reactors for practical applications. Its business strategy involves obtaining regulatory approval for a standardized commercial power reactor. Once a standardized design is approved, the company intends to implement a manufacturing process that allows for the creation of many identical units. The long-term goal is to execute a fleet-scale rollout across several different markets. This approach is intended to produce repeatable and commercially viable energy systems through standardized reactor manufacturing and consistent deployment strategies.Strategic partnerships for commercial useEarlier in 2026, NANO Nuclear Energy entered into a non-binding memorandum of understanding with Ameresco. The two firms are working together to evaluate the requirements for siting, licensing, and constructing modular microreactors in the United States. This agreement also includes planning for the eventual decommissioning of the units once their operational life is complete. The KRONOS MMR is the specific technology being evaluated under this partnership.Before the university partnership and the Ameresco agreement, the US Air Force awarded NANO Nuclear Energy a research contract. This contract was issued through AFWERX, the innovation branch of the Air Force. The purpose of the study is to determine if the KRONOS microreactor can provide energy to Joint Base Anacostia-Bolling in Washington, D.C. The Air Force aims to use this technology to meet its goals for energy resilience. This project provides NANO Nuclear with information regarding the energy needs of the defense sector which may be used for development in the future.

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