[boris]

There was a guy who fell into an operating "swimming pool" reactor (heavy water, blue Cherenkov glow).

He became so radioactive that he claimed that when he died, he'd have to be disposed of as 'low level nuclear waste'.

As I recall, he made a living of giving lectures on his experience and having people test him with geiger counters...

--Boris

[RadioAstronomer]

At UIUC there was (it's now gone) a Triga-A bathtub reactor. I sat on the edge with it "cranked" up into the megawatt range and watched the core glow an incredible blue from the Cherenkov radiation. :-)