Yeah, we ended up hand waving a bit on that one, using, for instance, a standardized 'X miners per MBTU of extracted energy' across coal, uranium, etc, and then using averaged health costs for miners in those industries, and so on, to estimate costs. Kinda vague, and not precise enough for a bunch of physicists, but still better than most assessments I've seen.
Which is kind of scary, when you realize that this was an undergrad physics course set.
Of course, the prof was one of the authors of the Swedish human exposure guidelines, so he wasn't a creampuff, but still.