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High hopes and security fears for next-gen nuclear reactors


Can fuel for advanced reactors pose a weapons threat?

And unlike solar and wind energy, which fluctuate with the weather and time of day, nuclear reactors provide a steady source of electricity similar to gas and coal power plants. Earlier this month, President Joe Biden signed bipartisan legislation into law meant to speed the development of next-generation nuclear reactors in the US by streamlining approval processes. “If the weapons usability of HALEU is borne out, then even a single reactor would pose serious security concerns,” says a policy analysis penned by a group of nuclear proliferation experts and engineers published in the journal Science last month (including an author credited with being one of the architects of the first hydrogen bomb).

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