Banning nuclear energy might be a problem, in say, France, which is very dependent on it. Because where would the energy shortfall come from? Coal?
But what about the likelihood about banning it everywhere? Zip.
Perhaps every country should assess where it could make cuts in energy consumption and then which renewable energy sources best suit it. Then, if, upon an independent assessment (UN?) it cannot meet its genuine needs this way, neighbouring countries might be able to assist, through direct renewable energy transfers and selling carbon credits.
If all that fails, perhaps nuclear energy remains.