Radiant Nuclear, a nuclear startup focused on microreactor technology, has raised $165 million in a Series C funding round led by DCVC. The company is developing the Kaleidos reactor, the first new U.S. reactor design in over 50 years, engineered to provide scalable, reliable, and clean energy. Radiant is among five companies selected by the U.S. Department of Energy to receive high-assay low-enriched uranium (HALEU) fuel for testing their first microreactor. This funding and technological progress coincide with recent legislative support for nuclear energy, including a $350 million grant program approved by the U.S. Senate aimed at revitalizing the nuclear power sector. Industry supporters highlight Radiant's potential to contribute to American energy resilience and provide safe, baseload power for military and civilian applications.