Nuclear proliferation issues are probably the second-biggest problem with nuclear power after economics. Michael Shellenberger spent much of this Forum discussion pretending it wasn't a problem at all. "You don't build nuclear power to get a nuclear weapon." Oh yes, you do. There's a huge amount of overlap in the technology.
France used civilian nuclear energy program to develop and disguise its nuclear weapons program (Shell completely screws this up). Other nuclear powers did the same thing. For Shell to claim the Iran example supports his position when so much of its program was built with the assistance of the UN, is really stupid. I have trouble believing he actually believes it.
Shell also made a somewhat misleading cost comparison of "built" nuclear power, which ignores the massive upfront construction costs. Existing nuclear capacity is cheap, but building new plants is a totally different issue that he glides by.
Also annoying is Shell's "I used to be against it, now I'm for it" conversion trick that climate denialists think give them credibility. It doesn't.
Getting back to proliferation, it's not an easy thing to solve because throwing taxpayer money at it, the Republican solution to nuclear power, won't work. I think a solution that expands nuclear power to other nations would require much more powerful UN control, not just inspections, of nuclear plants. I also don't know how you get this unless existing nuclear powers offer up the same degree of restriction on sovereignty. Tell that to the Tea Party.