>> this is a quiet place. >> over the years they built ten nuclear reactors, a plutonium fuel fabrication facility which took plutonium, the most dangerous material on earth, and made nuclear fuel out of it. and a hot lab in which they shift in irradiated nuclear fuel to be cut apart. none of those reactors, by the way, had a containment structure. those domes associated nuclear power plants, they were just in regular rooms. >> the most well-known of those was a reactor called the sodium reactor experiment. >> sre, the sodium reactor experiment is radically different from other reactor concept...