> Thorium only has advantages if you use a breeder. A thermal breeder, that is. In the fast spectrum the U-Pu cycle is superior. And even so, a thermal Th bre

> Thorium only has advantages if you use a breeder. A thermal breeder, that is. In the fast spectrum the U-Pu cycle is superior. And even so, a thermal Th breeder has a very low breeding ratio, and in the thermal spectrum poisons are worse, meaning that the reprocessing volume to produce a unit of fuel will be frickin huge. Good luck making that economical.