“Nuclear power provides about 10 percent of the world’s electricity and despite the growth of renewable power in recent years continues to be the world’s largest source of zero-carbon electricity.”
…
“The biggest problem with nuclear power is not safety but financial cost, specifically the huge up-front expenses associated with building safe reactors. Better regulatory policy could make it easier to reuse the same reactor designs (as in South Korea), but a promising nuclear future is based on innovation and new reactor designs.”
https://www.vox.com/2020/2/28/21155995/jessica-lovering-nuclear-energy