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Conference Spotlight
2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
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Latest News
Antares achieves zero-power criticality at INL
Leveraging more than $140 million in private capital fundraising, over 322,000 square feet of operational manufacturing space, and multifaceted partnerships with the Departments of Energy and Defense, reactor start-up Antares has become the first company involved in the Reactor Pilot Program to achieve zero-power fueled criticality—a full month ahead of the July 4 deadline set by President Trump’s Executive Order 14301.
This milestone, announced yesterday, was achieved with the company’s Mark-0: a sodium heat-pipe-cooled, TRISO-fueled microreactor. The Mark-0 is a forerunner to the company’s flagship design, which it calls the R1. For Antares, this development represents a key validation of its reactor physics, control systems, and supply chain.
Technical Session|Panel|Radioisotope Power Systems
Tuesday, May 7, 2024|10:00–11:40AM MDT|Sweeney F
Session Chair:
Harsh Desai
Alternate Chair:
Session Organizer:
There has been a rapid growth in demand for space exploration and utilization of nuclear systems from both government and commercial customers. With multiple projects executing between AFRL, DARPA, and NASA, there has been significant progress in advancing commercial technologies for radioisotope power systems, nuclear thermal propulsion, and fission surface power. For successful deployment of these space nuclear systems, the nuclear industry will need to establish a resilient, affordable, and a sustainable supply chain for HALEU and radioisotopes. This panel assembles experts to deliberate on the crucial task of ensuring that the nuclear supply chain is well-equipped to meet this burgeoning need.
James Daffron
U.S. Dept. of Energy/Oak Ridge Environmental Management
Ken Rueter
United Cleanup Oak Ridge
Danielle Gagen
Westinghouse Electric Co.