Very easy, Alzero: we did not find a good place to store the nuclear waste securely enough and thought it might make more sense to invest into technologies that do not poisen our drinking water, change our DNA or cause problems to our grand children that they might not be able to cope with.
Unfortunately, people in Germany prevented these systems to be built or the necessary power-cables to be put into the ground. Now we have wind turbins, solar panels and water energy generators that could power most of our country but have no way to bring the electricity from the production side to the consumers. Windparks in the north sea f.e. are widely not connected to our power system...
Once this is solved (hopefully...) and more households are getting solar panels to cover 80 - 90% of their consumption with it, we are good to stop nuclear plants, brown cohle plants and other poluting systems. takes a while though to turn a complete country upside-down...