I'm sure you will be able to look up the location of active nuclear power plants in central Europe and determine the population figures within the range of impa

I'm sure you will be able to look up the location of active nuclear power plants in central Europe and determine the population figures within the range of impact of an accident like Chernobyl's if you try. Start with Mohovce (largely uncontained and litigation since 2005 or so), Bohunice, Temelin and the large cities nearby...