The Senate couldn't even move on legislation to define a regulated Thorium fuel cycle after two attempts by Orin Hatch about 12 years ago. Died in committee both times.
LFTR reactors are inherently safe by design and waste has a half life measured in tens of years, not thousands.
The Gamma radiation exposure during part of the fuel cycle is the technical challenge that I believe could be overcome with robotics, etc.
But there is no political will to make a shift. And the reason Thorium didn't get the nod out of Oak Ridge in the 1950's was because we couldn't make bombs with the stuff.
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