It would take a long time to build new reactors, so not sure that would help.
Germany could also do more wind, solar, tidal, geothermal (fossil fuels aside).
It is going to take a long time and a lot of resources no matter what so maybe we should be building effective longterm solutions like nuclear instead of stopgap solar and batteries
I'm not sure how tidal and geothermal fare in Germany
It seems that some geothermal works have caused mini-earthquakes and soil shifts in Germany and the Netherlands