Nuclear power sits at the center of today’s climate debate because it can generate large amounts of electricity without the smokestacks and tailpipes that drive global warming. Yet calling it 100% ...

One of the surviving reactors at the Kashiwazaki-Kariwa plant was loaded with fuel last summer and recently turned back on, to mixed reactions.

Companies like Kairos Power are building new types of reactors with the encouragement of the Trump administration, but their success is far from assured. By Ivan Penn Reporting from Oak Ridge, Tenn.; ...