So, I just got back from installing DSL at a nuclear medicine laboratory. Freaky. I had to wear a lab coat, dosimeter, and sweep my hands and feet with a Geiger counter when I left.
Only absorbed 1 millirem of radiation, so it’s not quite like bringing broadband to Chernobyl, but still…
Good news is they gave me some stickers with the trefoil and “Radioactive Materials” in big block letters 
Edit:
According to http://hyperphysics.phy-astr.gsu.edu/hbase/nucene/radexp.html I took 1.2 minutes off my life. Alas!
