5. Reactors aren't nuclear bombs
The fears of a nuclear explosion in the two to four-megatonne range due to reactor core meltdown, which, it was claimed, would destroy the nearby city of Kiev and make large areas of Europe uninhabitable, turned out to be wrong. Nuclear power stations don't explode like nuclear bombs — and certainly not thermonuclear ones in the megatonne range. In any case, such an explosion wouldn't have destroyed Minsk, nor would it have made Europe uninhabitable.
I know this is a controversial topic, but I'm still surprised by how difficult it is to get a straight unbiased answer on how potentially dangerous Chernobyl could have been. Seems like pro nuclear sources greatly underestimate, and anti nuclear greatly overestimate.