@MikeCarbine Sure, there are four currently running in Japan, France and Russia. Two are Generation two, two are generation three. There is a fifth being built in india.

The reason there arent many built right now isnt because they are experimental, its because they arent needed. We have plenty of excess nuclear material and it is so easy to mine more, and we need so little of it to begin with, there simply isnt much need. That and the fact that a single breeder reactor can supply fuel for many other normal reactors. So even if you are getting your fuel from a breeder you only need one breeder to support several normal nuclear plants.

The point here being since we are talking about it as a renewable for electric cars should our supply ever become an issue (which honestly is unlikely) we can always make more fissile material from existing fissile material. So it is an abundant renewable resource, so abundant we dont **need** to renew it, but we **can**.