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Energy

South Bay Companies Lead Nuclear Reactor Development

WireByte Staff · August 3, 2026

Three South Bay companies, Radiant Industries, Valar Atomics, and Antares Nuclear, are at the forefront of nuclear reactor development in the US. They have secured over $600 million in funding and achieved criticality in their reactors, a key milestone in the DOE's reactor pilot program.

Key points

  • The US Department of Energy's reactor pilot program has 11 projects, with three from South Bay companies in Los Angeles.
  • Radiant Industries, Valar Atomics, and Antares Nuclear have secured over $600 million in funding since entering the program last summer.
  • Antares Nuclear and Valar Atomics achieved criticality in their reactors before a July 4 deadline set by President Trump's administration.
  • Criticality marks the point at which a self-sustaining nuclear reaction is achieved, but does not mean the reactor is generating net energy.
  • The companies' progress is seen as a success for the DOE's initiative to speed the development of next-generation nuclear power in the US.

The South Bay region in Los Angeles is emerging as a hub for nuclear reactor development. Three companies, Radiant Industries, Valar Atomics, and Antares Nuclear, are leading the charge in the US Department of Energy's (DOE) reactor pilot program. The program aims to speed the development of next-generation nuclear power in the US by unlocking private funding and potentially fast-tracking future commercial licensing activities.

The three South Bay companies have made significant progress since entering the program last summer. Each has secured over $600 million in funding, with two of them, Antares Nuclear and Valar Atomics, achieving criticality in their reactors before a July 4 deadline set by President Trump's administration. Criticality marks the point at which a self-sustaining nuclear reaction is achieved, but does not mean the reactor is generating net energy.

The companies' progress is seen as a success for the DOE's initiative. The reactor pilot program was announced in June last year as part of the initiative to speed the development of next-generation nuclear power in the US. The program has 11 projects, with the three South Bay companies being among the most successful so far.

The development of next-generation nuclear power has the potential to provide a cleaner and more reliable source of energy. The DOE's initiative is seen as a step in the right direction towards achieving this goal. However, the companies' progress is still in its early stages, and it remains to be seen whether they can successfully commercialize their reactors.

Sources

WireByte Staff — Editorial Team

The WireByte editorial team synthesises technology news from multiple primary sources, verifies the facts, and links every source. Articles are produced with AI assistance and reviewed under our editorial policy.