The phenomenon that makes stars shine and hydrogen bombs explode has yet to be reliably tamed for energy generation. But that isn’t stopping companies from trying.

Whether the billions of dollars of investment will lead to an inexhaustible source of clean electrical power is not yet known.

The phenomenon that makes stars shine and hydrogen bombs explode has yet to be reliably tamed for energy generation. But that isn’t stopping companies from trying.

Shadowed by past disasters, nuclear engineers are developing different types of reactor, fuel, coolant and material that could help to make fission the zero-carbon energy…