I use only really small amounts of uranium powders and we have to keep a record of how much we use and if we spill any. This is for safeguarding regulations, which are the rules for handling fissile nuclear material to prevent people stealing it. I wear a lab coat, safety goggles and a respirator (gas mask) to stop me from breathing any powder in and I have to run all my experiments in fume hoods so everything is contained
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