Nuclear Energy practice leader and former Nuclear Regulatory Commissioner Jeffrey Merrifield and Energy partner Anne Leidich advised Subcritical Systems Inc., an Austin-based energy technology company, on regulatory strategy for pursuing licensing of its accelerator-driven subcritical Energy Amplifier system under the existing U.S. Nuclear Regulatory Commission (NRC) regulatory framework, following recent engagement with the NRC.

Founded in early 2025, Subcritical Systems is developing a new class of accelerator-driven subcritical nuclear energy systems for deployment in the U.S. The company combines high-power particle accelerators with deeply subcritical nuclear assemblies to create energy systems designed to be inherently safe, controllable and scalable.

The Energy Amplifier concept employs a high-power particle accelerator to drive fission in a deeply subcritical nuclear assembly, remaining below criticality under all operating and design-basis conditions. Because fission is externally driven, the system shuts down immediately when the accelerator beam ceases.

According to a company press release, the company plans to continue technical development and regulatory engagement as it advances toward domestic deployment of accelerator-driven subcritical energy systems for future commercial applications.

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