Mirion Supports Advanced Reactor Criticality Milestones Through U.S. DOE Reactor Pilot Program
Mirion Technologies and Paragon Energy Solutions Provide Radiation Monitoring and Nuclear Safety Systems for Advanced Reactor Demonstrations
Mirion, a global leader in radiation safety, science, and medicine, announced today that its Mirion Technologies and Paragon Energy Solutions businesses supported multiple advanced reactor designs that have achieved criticality milestones in the U.S. Department of Energy (DOE) Reactor Pilot Program, established under Executive Order 14301.
In May 2025, the Administration issued executive orders to strengthen and accelerate the U.S. nuclear industry. Executive Order 14301 directed the DOE to bring at least three advanced reactor designs to criticality by July 4, 2026. Of the 11 projects initially selected, four achieved criticality — the ability to sustain a controlled nuclear chain reaction.
Across these efforts, Mirion Technologies and Paragon provided products, systems, and expertise spanning reactor protection, neutron flux monitoring, radiation monitoring, health physics, radiation protection and radiochemistry. These capabilities helped developers reach criticality safely and advance their projects.
