Hadron Energy has cleared an early milestone in its effort to commercialize small-scale nuclear power in the United States. The advanced nuclear technology company announced that the U.S. Patent and Trademark Office has published its first patent application, placing the engineering framework behind its Halo Micro-Modular Reactor into the public domain.
The patent publication marks the company’s first major intellectual property filing and provides a detailed look at the reactor design Hadron plans to advance through the U.S. licensing process. The application, published on May 7, outlines the technology behind the Halo reactor, a compact nuclear system designed to deliver 10 megawatts of electricity.
Company founder and CEO Samuel Gibson, Chief Nuclear Officer Ross Ridenoure, Christopher R. Neal, and Andrew M. Ward are listed as inventors on the application.
The application details an integral pressurized-water reactor, a compact design that houses key nuclear systems within a single pressure vessel rather than across multiple structures.
Traditional nuclear plants typically rely on large external pipes to connect these systems. Hadron’s approach removes much of that complexity by housing them within one unit.
According to the application, the design could simplify transportation, installation, and maintenance. It also removes the large external coolant piping associated with conventional reactors.
The patent describes reactor configurations capable of producing between 6 and 60 megawatts of thermal energy. Electrical output ranges from 2 to 20 megawatts. Hadron’s flagship Halo configuration targets 10 megawatts of electricity generation.
The application also focuses heavily on manufacturability and deployment. Engineers designed the reactor vessel in sections connected through circumferential flanges. This approach allows the company to assemble and test the reactor before shipping it to a project site.
Hadron says the design supports transportation by conventional road networks and even certain air transport systems. The company views transportability as a key advantage for remote locations and industrial customers that require reliable power.
The reactor uses Low-Enriched Uranium Plus fuel. Hadron selected the fuel to support multi-year operating cycles while leveraging existing domestic fuel supply infrastructure.
The filing also outlines passive safety features intended to keep the reactor core cooled for extended periods without alternating-current power under design-basis conditions.
The patent publication arrives as Hadron advances regulatory work with the U.S. Nuclear Regulatory Commission. Recently, NRC staff accepted the company’s Quality Assurance Program Description. Hadron also submitted its Principal Design Criteria white paper to regulators, another step in the licensing process.
Gibson said the patent publication establishes the technical foundation of the Halo reactor and begins what the company expects to become a broader intellectual property portfolio. He added that the filing reflects years of engineering work and supports Hadron’s long-term commercialization strategy.
Hadron intends to market Halo as a transportable source of carbon-free electricity for sites that lack reliable grid access. The company ultimately hopes to become the first developer to bring a licensed light-water microreactor to market in the United States.
While significant regulatory hurdles remain, the newly published patent offers the clearest public view yet of the technology Hadron plans to use in pursuit of that goal.
Aamir is a seasoned tech journalist with experience at Exhibit Magazine, Republic World, and PR Newswire. With a deep love for all things tech and science, he has spent years decoding the latest innovations and exploring how they shape industries, lifestyles, and the future of humanity.
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