The more advanced (Stanford Energy Symposium) research that I've seen suggests that there is only one possible power source that we can look to long term to meet the energy needs of the world, and that is Solar Energy. Nuclear Energy just won't be possible to build out quickly enough, inexpensively enough - even if we could do it safely.
In particular, check out Nate Lewis's Solar Energy 101 (https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodca...) - In the Global Climate and Energy Project (GCEP) where he makes a strong case that the only choice is Solar - not because it's a good one, but because there is nothing else out there that can meet our needs (And he spends a bit of time talking about Nuclear Energy, and why it comes up short).
In particular, check out Nate Lewis's Solar Energy 101 (https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodca...) - In the Global Climate and Energy Project (GCEP) where he makes a strong case that the only choice is Solar - not because it's a good one, but because there is nothing else out there that can meet our needs (And he spends a bit of time talking about Nuclear Energy, and why it comes up short).