Comment by atwrk

Have a look at this nuclear plant in Northern Germany that is in the process of being decomissioned since 1995. It's still not finished, suspected end date is now in the 2040s and is now projected to cost about 10B €. For a single plant.

https://de.wikipedia.org/wiki/Kernkraftwerk_Greifswald (you have to translate that page yourself, the English version doesn't contain the relevant information)