There are a lot of hidden costs with nuclear energy. For example, I don't know of any country where the insurance costs for nuclear power plants are not capped. This means that in the event of a disaster, the costs have to be borne by the taxpayer. The same applies to the costs of final storage. No one knows how much this will cost over the next million years or so. If all these costs were included in the calculation, it would become clear that nuclear energy is extraordinarily expensive. Of course, this is not in the interest of the nuclear companies (the same ones that run fossil power plants, by the way), because the lower the more optimistic their believers are, the more money the companies make.