It is too late. You'd have to rebuild an entire industry. There is no trained personnel for this, no suplly chains, no plans or up-to-date regulations, nothing. It will cost billions over billions and take at least decade before you even have your first new powerplants.

You can install many times their capacity in renewables for cheaper and without the riscs and dependencies attached in that time span. That's a fact and you can hate it and would be right, but that doesn't change it. Nuclear is over for Germany and the cries to reinstate it are nothing but populism.