Could they not powder it (well glass granulate or sinter or such) and mix
it with the waste rock and earth where it came from, and fill in the mine
with it ? If the uranium had been left alone and had radioactively decayed
in situ it would have ended up exactly like that, no ? Excepting for the
higher concentration (and thus activity) of decay products ? After all
using U from a mine in a reactor is like turning the clock of natural U
decay in fast forward mode. I am not saying it is simple or cheap. It
could double the cost of extraction (if it works at all).

Peter

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