“A lot of what’s constraining nuclear power is economics,” says Matthew Bunn, a professor of practice at the Harvard Kennedy School. It’s much easier for a large, centralized state than for a private utility to absorb the billions in upfront costs necessary to build a reactor. That, says Bunn, is largely why growth is concentrated in Asia and Russia.
MORE: China goes nuclear
This story is from the April 28, 2014 issue of Fortune.