Crazy Ideas

No. This is separating things down into their base elements. Yes, if you had some alloy that was half enriched uranium and half some other element, this machine would separate the alloy into those two elements. So you have one bin full of another metal like iron or tin. And then in the other....you have a pile of extremely radioactive uranium. Simply sorting things by atomic number does not make an isotope cease being radioactive. However, you could use this to aid in nuclear waste processing. It would be a lot easier to deal with waste if it is broken down into its constitutive elements. However, it's likely that if we ever built these, we would keep the ones used for anything radioactive kept for that and only that use. Highly radioactive material passing through any complex machine is going to cause all sorts of problems. So your local city recycler wouldn't be doing any nuclear materials recycling. That would be done at dedicated facilities.