I don't have a background in physics. However I wanted to ask a question relevant to the Chernobyl disaster. From what I found online the helicopter that tried to release sand to shut down the fire over the nuclear core.
"...due to the height and the amount of radiation coming from the core remains the crane operators would have received lethal does before any crane movements could be done along with the electronics of said cranes fried to a crisp from the radiation." (https://www.quora.com/Why-did-the-helicopter-crash-in-Chernobyl-while-covering-the-exposed-nuclear-core)
My question is:
Is it because it was over the nuclear core? or could this had happened in another contaminated area?