I remember someone from the Manhattan Project that suffered the same fate. Is that "commercial nuclear history?"

This article on Douglas Crofut [died 1981] implies that there were several.

"His death was the first of its kind in the United States since the 1940s, when radiation deaths occurred during the Manhattan Project at Los Alamos, New Mexico."

https://en.wikipedia.org/wiki/Douglas_Crofut

It turns out that there were two Manhattan Project fatalities, one in 1945, and one in 1946.

https://en.wikipedia.org/wiki/Harry_Daghlian

https://en.wikipedia.org/wiki/Louis_Slotin

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.

"First of its kind since the 1940s" still seems a little questionable given the Cecil Kelley incident (Los Alamos, 1958).

https://en.wikipedia.org/wiki/Cecil_Kelley_criticality_accid...

Interestingly, both the Tokaimura and Kelley incidents involved a radioactive solution in an unfavorable geometry.