Radiant raises $165M for reactor test

Backing will bring portable nuclear Kaleidos closer to 2026 trial.

With support from the U.S. Department of Energy and $225 million in private investment, California-based startup Radiant Industries, Inc. is preparing to test Kaleidos, the world's first mass-producible 1-megawatt portable nuclear microreactor.

After decades of stalled innovation, shifting public opinion, and growing urgency around...