Well first, coal went down, too, if we are still discussing Germany. In parallel with shrinking nuclear generation. See the cleanenergywire link upthread for the numbers. So the coal vs. nuclear discussion is baseless already (again, if we still talk about Germany).

Secondly, energy != electricity. Coal is mostly used for central heating (a plant heats water, water is then transported to a whole neighborhood). Electricity is sometimes also produced, but usually not the primary reason for the plant to exist in the first place. Nuclear plants are usually used for generating electricity (in Germany). Germanys carbon problem is the heating infrastructure being dependant on fossil fuels (mostly gas), but it has no lack of electricity sources.

Thanks for stating your openmindedness re/ nuclear discussion, BTW, IME statements like this can really lift the whole level of discourse.