A better reactor design could allow more commonly available radioactive (but non-fissile) elements such as Thorium to be bred into fissile elements such as Uran

A better reactor design could allow more commonly available radioactive (but non-fissile) elements such as Thorium to be bred into fissile elements such as Uranium-233. This kind of reactor is called a Breeder reactor [1], for example the liquid fluoride thorium reactor (LFTR) [2]. [1] https://en.wikipedia.org/wiki/Breeder_reactor https://en.wikipedia.org/wiki/Breeder_reactor [2] https://en.wikipedia.org/wiki/Liquid_fluoride_thorium_reactor https://en.wikipedia.org/wiki/Liquid_fluoride_thorium_reacto...