SPS doubts

Thanks, this is a very comprehensive report and focused in the "near"
term (say, next 50 years); occasionally, I'll read it in detail.

My own claims about "nukes powering Humanity for centuries" come from a
short report estimating the theoretical durability of nuclear fuels
reserves, at
http://www.nea.fr/html/pub/newsletter/2002/20-2-Nuclear_fuel_resources.pdf