It's a technicality, but I think those events don't qualify as both "accident" and "commercial." The Manhattan Project was a government project, not a commercial enterprise. Crofut's exposure seems to have been an attempted suicide, not an accident.

I realize the article is about nuclear plants and accidental exposure to radiation, but it conveniently omits the fact that thousands of people died from radiation when Hiroshima and Nagasaki were nuked. Those bombings were no accident, of course, but from the point of view of the victims, what's the difference? They were subject to forces beyond their control, just like any other accident.