They will just replace reactors which are running out of their life span, so the increase won't be that significant (or it won't last that long). Also there are two problems - we are are not capable to finish them for a few decades already and Austria might seriously pressure us to not build them at all (tho that's less of a problem since we can just ignore them). Also we could easily "greenify" our energy sources by using biomass to produce electricity. That renewable resource is seriously underused. We could stop using coal/fossil plants pretty easily in a less than maybe 2-3 years and use only green and nuclear power, but instead the government flushes money in form of donation to our coal mines. I hope that changes after next election cycle.