Yeah, yeah, proliferation risk. If the stuff is that hard to
contain then why all the waste sitting around?
I think the concern about breeder reactors isn't so much the proliferation risk of the fuel and waste itself, but that a commercial market in breeder reactor technology will proliferate the knowledge and equipment necessary such that state actors will find it easier to build breeder reactors quickly and secretly.But maybe that's just a misperception on my part.
Before Beowulf clusters, building supercomputers required tremendous expertise. The U.S. thought it could keep China from building supercomputers by controlling the export of supercomputers and supercomputing-enabling technology. But once supercomputing moved to clusters of commodity hardware, most of those export controls became useless almost overnight. China didn't spontaneously develop an expertise in chip design and fabrication; rather, because of the technological shift in the West, supercomputing know-how and equipment simply became impossible to contain.