That's a fast breeder reactor. While there are some thorium salts involved it is NOT a molten salt reactor.
Google "molten salt thorium reactor" pictures. All you get is diagrams.
India doesn't have much uranium and nuclear fuel is expensive. But they have lots of thorium which can be fed to certain reactors. The fast breeder creates more fuel(radioactive material) than it uses. It can actually create more fuel for itself than it can burn.
Call it fuel if you want, it sounds like radioactive waste to me.
Lotsa folks working on, it tons of money being spent, best guess is maybe 15 years before one gets hooked up to the grid.
Good coffee, good weed, and time on my hands...