Why don't you build integral fast reactors? They are capable of consuming the existing way and create power in the process. They also can't melt down even theoretically since a runaway reaction is not possible with them. At least you would generate power cleanly from your EXISTING waste. It is far better to use the waste than bury it and you do less damage in the process.
So far I have not been very impressed with decisions being based on actual science and careful thought in Germany. It has certainly not been my experience with anything regarding GMO where almost every German I have run into is against it period and no discussion is possible. They do want the life saving medical treatments though that are possible with GMO they just don't want them developed here.