The top regulatory agency for nuclear materials safety in the U.S. voted unanimously to regulate the burgeoning fusion industry differently than the nuclear fission industry, and fusion startups are celebrating that as a major win. As a result, some provisions specific to fission reactors, like requiring funding to cover claims from nuclear meltdowns, won't apply to fusion plants. Other differences include looser requirements around foreign ownership of nuclear fusion plants, and the dispensing of mandatory hearings at the federal level during the licensing process, Holland said. The electricity generated by nuclear fission is considered clean energy by the U.S. Department of Energy because it generates no greenhouse gas emissions. And these reactors deliver massive quantities of power: Half of the carbon-free energy generated in the U.S. comes from nuclear fission reactors.

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