There have been three accidents related to nuclear power generation, Three Mile Island, Chernobyl and Fukashima. There were a total of 33 deaths attributed to those three incidents (32 from Chernobyl and 1 from Fukashima.)

There are 58 deaths per terawatt-hour attributed to coal alone, mostly due to air pollution.

I’d say that nuclear power is very close to completely harmless in comparison. Certainly in contrast to its perception among the general public.