Your "large area" is actually tiny, and the solution is to... not go there. Yeah, all you have to do is not go to a very specific tiny area in Ukraine. I think that's quite easily manageable.

As usual, when such things are mentioned, you lack any and all sense of scale and statistics. Just pure fearmongering.

Look at the number of all nuclear plants over their entire lifetime and divide their benefits by the cost of what, the two or three major incidents you can think of? This simple calculation alone makes your arguments utterly ridiculous. We accept 1000x the risk and cost of that on a daily basis, in e.g. driving, gas and coal plants.

Go ahead and evacuate to get away from the negative effects of soot, tire dust, CO2, and all the other fun pollution that's spread out over the entire atmosphere. Good luck living on Mars.

It's even worse than this, you'd don't even need to compare to other industries, nuclear-induced death over the past 40 years are negligible even when you compare to stuff like professional diseases of maids or electricians (and I'm purposely not picking hazardous professions…).