Only if you hit it with a nuclear weapon.
Not true. Someone could slip and break their neck while working at the plant.
I am 100% sure this would be reported by the US media as a death due to the OMG HUGE MELTDOWN!
Now if you're asking (as I assume) could someone have been killed by radiation within days of the incident, then CalBear is right. You'd need some external agent (bomb, sabotage, etc.) to put out enough REMs to do more than raise someone's risk of cancer by 1%.
I haven't checked lately, but last I heard there hadn't been any deaths due to radiation at Fukushima, which (last I checked) was
already several
orders of magnitude worse than Three Mile Island.