The Chernobyl_disaster was quite serious and its destruction zone of danger remains.
https://en.wikipedia.org/wiki/Chernobyl_disaster#Reactor_conditions_priming_the_accident
https://en.wikipedia.org/wiki/Chernobyl_disaster#Radiation_levels
Radioactivity by Kraftwerk: https://www.youtube.com/watch?v=0EBTn_3DBYo , https://kraftwerk.com