For your information and viewing pleasure, here is the 'Story of EBR-II'...this Experimental

Breeder Reactor was the forerunner of the now under construction "Natrium" Reactor Project being built by a consortium of Bill Gates "Terrapower" program and GE/HItachi in Wyoming...EBR-II, as the video shows, provided milestone accomplishments that allowed "Natrium" to be approved as a Safe and Efficient means of not only producing electric power, but also turning Nuclear "Waste" into Fuel for a millennia, without mining another kg of Uranium...and reducing the time needed to to isolate the remaining waste from thousands of years, to a few hundred.