Thorium required a breeder reactor in order to produce the U-233 necessary for fission, and as stated in another comment, these reactors are still in experiment

Thorium required a breeder reactor in order to produce the U-233 necessary for fission, and as stated in another comment, these reactors are still in experimental stages and have a much lower level of operational safety record. A thorium breeder is not the same thing as a uranium breeder. http://thoriumenergy.blogspot.com http://thoriumenergy.blogspot.com