Yeah no, you cannot compare nuclear Fallout to airplanes flying down. At least Not from a risk Assessment and Management Level. From the nuclear Fallout you cannot prepare against it, when it Happens you are fucked (AS a country). From a airplane crashing you can prepare against that, as the severity aint that Bad regardless who sits inside (be it President, chancellor, CEO, other important person), for a functioning society its not that important as there are other people taking over that Helm. But when nuclear Fallout Happens, your whole people will fall ill to it, ceasing your society to exist. So it is only proper risk mitigation to end the use of all nuclear plants.
I think, its time to get even with them. Just deploy some NATO member Staates troops to Ukraine. I guess Putin wont be complaining too much about it