Have you ever read "Sustainable Energy without the Hot Air?" http://www.withouthotair.com/ ... free book written by a cambridge theoretical physicist. Well worth a read. From a C02 perspective at least nuclear is quite a lot better than other things.
I actually do understand clean energy, and these nuclear powered vessels to which I refer have already been built and fitted.
What better use for them than to clean our oceans?
http://en.wikipedia.org/wiki/North_Pacific_Gyre
http://www.greenpeace.org/international/en/campaigns/oceans/...