In my own hometown, the word went around some years ago that the local nuclear plant needed to “burn 400 welders.” This is industry jargon for using up the annual radiation dose of 400 certified nuclear welders. The project was to reinforce the steel torus, a kind of hydraulic damper located beneath the reactor containment vessel. The torus is partially filled with water, and pipes from the containment (sealed by burst diaphragms) terminate below the water’s surface. Any sudden pressure pulse from the reactor would be absorbed by lifting the water in the torus. To allow welding on the torus, its water had to be drained. Unfortunately, according to workmen at the site, there was insufficient tankage on-site to hold it all. One of them asked me to find out where it went.