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).

The entire series is a gold mine for people who actually want to talk about energy generation and climate change on an informed basis rather than just making guesses to suit their particular world view.

With that said, one of my favorite futurists, Ramez Naam, who is a big proponent of Wind and Solar (See: http://rameznaam.com/2015/08/30/how-steady-can-the-wind-blow... and http://rameznaam.com/2015/08/10/how-cheap-can-solar-get-very...) still thinks we should invest in nuclear, as it has an important role to play in regions where renewable resources (Solar/Wind/GeoThermal/HydroElectric etc...) are not available, and as a hedge against storage (which is critical for solar/wind) technology not advancing to where we need it for 100% support of base-load power.

Though he also talks about Storage here: http://rameznaam.com/2015/04/14/energy-storage-about-to-get-...