In December, Commonwealth Fusion Systems (CFS), an MIT spin-off, announced plans to build the world’s first grid-scale nuclear fusion plant outside of Richmond, Va., scheduled to open in a decade. A few years ago I wrote on these pages that “nuclear energy is looking good again” – but that was about nuclear fission, the current (somewhat problematic) technology used at nuclear plants.
Nuclear fusion – the physical reaction when two hydrogen nuclei collide and create a heavier helium nucleus (as occurs at the sun’s core) – creates a vast amount of energy, four times more than nuclear fission.