Yes, costs include decommissioning. I have no idea where the idea that large nuclear plants have never been decommissioned - dozens have. Total costs exceeded p

Yes, costs include decommissioning. I have no idea where the idea that large nuclear plants have never been decommissioned - dozens have. Total costs exceeded projections by ~40 billion euros. But in aggregate France's nuclear projects are dirt cheap compared to the hundreds of billions or even trillions of dollars to be spent in other countries' non-nuclear decarbonization plans. And it's offset by the 3.3 billion euros of power exported to neighboring countries that fail to meet their energy needs through non-nuclear energy (namely Germany which foolishly decided to prematurely close it's nuclear plants). France has created electricity generation that is both cheap and carbon free.