I don't think this is true. Germany actually was trying to build a Reprocessing Plant, against massive protest, it was given up:
https://en.wikipedia.org/wiki/Nuclear_reprocessing_plant_Wac...
https://en.wikipedia.org/wiki/Nuclear_reprocessing_plant_Wac...
There is a (unilateral) German law against such facilities and (regular private law) contracts to use the British and French ones.