FB uses high energy newtron for chain reaction. so advantage is thet if fuel is not very pure, chain reaction will not stop and there will be a very high burn out ratio.
Non radio active material such as thorium is put in FB which absorbs newtron and becomes fuel which can be used in another type of reactor to generate energy.
FB is a very critical technology in which we have moved a way ahead.
Thorium is non radioactive material ????
LOL please read what you are typing and then post !
It will be good to research about what you are trying to say and it makes sense or not ....before posting .
wiki is just click away ..take little trouble
It is easy to copy -paste rather than coming out with your own non -existent theories ....