Dissolved spent fuel rods are a major ingredient in Dark's coffee. Ever since he found out that it (the coffee) would totally dissolve them (fuel rods) and render the radioactivity harmless.
It is a little known fact that the NRC contracts Darks to dispose of their depleted rods...
The only thing remaining is a dark brown stain on the coffee cup. It was discovered that if you let it dry it would scrape off nicely. When enough is accumulated he sprinkles if out in the back forty. Bambi's seem to flock to it. The only noticeable affect on the bambis is that it causes their eyes to glow in the dark...
Hey, there were instruction left not to dump the sludge flakes out there.
Of COURSE I had to see what would happen.