I read a little bit about General Atomics EM2 reactor in the December issue of Nuclear News that someone had brought to work recently. I haven't had a chance to read all of the article and I am curious about this reactor design. Are any of you involved in it? It claims to be able to run for 30 years without re-fueling on even DU as an initial fuel. Then it goes on to claim that it has a low weapon proliferation, even though the thing is obviously a breeder reactor that runs most of its lifetime on plutonium (from U238 neutron capture/-beta decay to PU-239). It seems to present a reactor design that would put uranium enrichment out of business, at least for a long time. Even though I work in the nuclear fuel cycle side of things, I still find this design exciting if it is true. But it seems too good to be true. What are the cons to this? Is it even a proven design? There is actually so much nuclear waste available, if even half the claims by General Atomics are accurate, this could provide power for a long long time if this thing works.