>Are old powerplants properly decommissioned and replaced with new ones when the time comes? Not a problem that you can solved today
>Can we really claim to be able to handle worst case scenarios well (e.g. Fukushima)? Yes, also Fukushima can't happen in geologically inert Western Europe.
However, what is clear is that the world needs consistent, plentiful, reliable carbon-free energy. The storage required to meet the first three conditions with renewables DOES NOT EXIST. It doesn't exist for anything outside of a few minutes. Nuclear power is: consistent, reliable and carbon-free; and humanity has known how to do it since the 1960s. In a contest between a technology we DO NOT HAVE, and one we DO, it is a no-brainer.