Motherboard TV has created a documentary called The Thorium Dream, that discusses some the great advantages of Thorium based nuclear reactors. The video points out that Thorium is considered more abundant, safer, has less waste, and can't be utilized as weapons grade material vs uranium.
The problem in the US is that our systems for creating nuclear material are built around uranium because it can be used for both generating power and weapons.
(watch the video here)
The Thorium Dream (Trailer)