As a result of a food preservation experiment (more of a bet, really) I have a few pounds of fruit that has been in a bowl (with lid) with a large chunk of uranium ore for about a month. The ore is contained in a plastic pouch which I cleaned beforehand and the entire setup was kept in a basement.
I'm not certain of the exposure, but the rock produces around 250k-300k CPM on a Ludlum pancake probe at 2" probe-to-surface.
Little point in bothering with preservation however if I cannot eat it. Is it harmful?