And why is that? PS this is a trap. You have been fed a line of bull by someone. There is no advantage that Thorium has over Uranium. The cost of nuclear safety is largely invariant, and the fact that capital and operating costs sharply disadvantage nuclear right now is an economic fact.
You are in error, Mr. Jackson.
There are incredible advantages to using Th over Uranium.
The liquid fluoride reactors are a major reason why.
And no weapons grade plutonium.
Thorium is widely available, in fact we throw it away every day. Uranium is rare in comparison. Thorium energy is cheap!
Many differences.