Jose Reyes, a nuclear engineer and cofounder of NuScale Power, in Portland, Oregon, says he and his colleagues can revive nuclear by thinking small. Reyes and NuScale’s 350 employees have designed a small modular reactor (SMR) that would take up 1% of the space of a conventional reactor. A typical commercial reactor cranks out a gigawatt of power, and each NuScale SMR would generate just 60 megawatts. For about $3 billion, NuScale would stack up to 12 SMRs side by side.

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