The Japanese and the US have been working on extracting dissolved uranium from sea water. We can do it, but we are trying to get the cost down to the same as land mined uranium. If that happens, and we are close already, we can run the entire world's current electrical demand off nuclear reactors for the next two million years.
Fukushima and the problems at the French reactor come to mind. Also calculate in the problem with Muslim terrorism.
The world is still weary when it comes to nuclear energy. Notice how today we worry about Iran and N. Korea and their nuclear programs.