Generating power without harmful carbon emissions has never been more urgent, yet one of the biggest sources of clean power is struggling to turn a profit.

The nuclear industry has been vying for a role as the perfect partner to the surging, but intermittent, renewables sector for years, citing its role as a stable source of emissions-free power. Nations around the world have set tough targets to reduce greenhouse gases with the help of clean energy to meet commitments set out in the 2015 Paris Agreement.

Record output from wind and solar is more frequently creating an oversupply that can push prices below where reactors are no longer profitable, or even to rates where utilities have to hand out power for free. The rout has been exacerbated by the global pandemic gutting demand. Generators from France to Sweden, Germany and China have been forced to turn stations off or curb output.