Using Thorium in a conventional solid fuel reactor is akin to trying to use deisel fuel in a conventional gasoline engine. You might be able to make it work... poorly, but seems smarter to use it in a Liquid Fluoride Thorium Reactor(LFTR).
It’s a thorium/plutonium mix. Looks like it isn’t a pebble bed unit or one of the saner thorium designs after all.