Natura Resources LLC is progressing with the development of the MSR-1, the first fourth-generation (Gen IV) nuclear reactor to be authorised for construction in the United States. The project, based on the campus of Abilene Christian University in Texas, has received a construction licence from the Nuclear Regulatory Commission (NRC) and is scheduled to be operational by 2026.
A liquid-fuel reactor with federal approval
Natura’s MSR-1 is currently the only liquid-fuel reactor approved for construction by the NRC and one of only two Gen IV projects to receive such authorisation. Operating with fuel dissolved in a molten salt mixture, the system uses modular technology at high temperature and low pressure, designed to improve efficiency and safety while reducing nuclear waste.
According to projections from the U.S. Department of Energy’s Idaho National Laboratory, the MSR-1 is expected to be the first Gen IV reactor to enter service in the country. Natura has already secured access to HALEU (high-assay low-enriched uranium) fuel and completed the necessary facility construction.
Preparing for commercial deployment
The company plans to submit two commercial licence applications to the NRC by the end of 2025. One will focus on medical isotope production, essential in certain cancer treatments, while the other will target grid-scale electricity generation.
In parallel, Natura intends to expand its workforce, finalise power purchase agreements, and complete procurement of components from U.S.-based suppliers. The company has raised $120mn in equity capital and is receiving matching financial support from the State of Texas.
Modular energy solution in development
Beyond the MSR-1, Natura is developing the MSR-100, a 100-megawatt (MW) modular version designed for commercial needs. Based on the MSR-1 design, this system can be factory-built and deployed in modules according to power generation requirements.
The modular concept aims to reduce capital expenditure compared with conventional pressurised water reactors. According to the company, the MSR-100 is also suitable for water desalination applications in oil-producing regions such as the Permian Basin.
