Alvin Weinberg pioneered this idea for nuclear power in 1960s. A pilot #MoltenSaltReactor was built and operated at Oak Ridge Lab for a number of years but never ran on Thorium. Several #SMR designs are derivatives from that idea including Canada’s Terrestrial Energy. Hopefully in the west we come up with a competitive design before China dominates
https://www.world-nuclear-news.org/Articles/Operating-permit-issued-for-Chinese-molten-salt-re