There was a renewed burst of enthusiasm for nuclear power a few years ago. In Australia, where I live it was confined to the political right and didn’t last long, but elsewhere support was broader. Most notable was the 2023 commitment by more than 20 countries, led by the US, UK and France, to triple global nuclear capacity by 2050. In the three countries mentioned, that would imply building 330 GW of new capacity as well as replacing retiring capacity.