Nuclear power is a solution that just creates another problem. Disposing of nuclear waste has been an issue that hasn't been resolved in 40 years- if you can resolve that, then yeah have at it. Bernie's plan is knee jerk, he should look into more and maybe look into disposing of the nuclear waste in a responsible manner.
John Oliver had an informative and entertaining segment on it two years ago.
Also... I find it odd that you reference James Hansen, when everything he stands for regarding climate change you just plug your ears and shut your eyes about. Is his opinion only valid when it matches your ideology?