We do have a pretty good supply of thorium. Back in the '80's IIRC, I used to have to off road over giant waste piles of the radioactive crap to do readings, get monitoring well samples, etc.
I like off roading, but, in a moon suit, and having to be steam cleaned afterwards (Plus the trucks) and Geiger Countered/Pee Sampled all the time took SOME of the fun out of it.
It WOULD have been nice to just spoon a little into the "gas tank" and have years' worth of fuel...instead of spending all that time cleaning the grit OFF the trucks, but whatcha gonna do? To be fair, there were crews that did the cleaning, I only had to get things dirty out there, and come back with the readings/samples.
:eg: