Do you have data that backs that cleanup is inarguably expensive? This article, which more concrete, suggests 5% of revenue is required to be saved.
http://www.world-nuclear.org/information-library/nuclear-fue...
http://www.world-nuclear.org/information-library/nuclear-fue...
The salt mine Assen that they put some nuclear waste in is now flooded. Getting the nuclear waste back out will cost several billions. I don't think they will even do it. So they risk contaminating ground water. That alone can be a cost of several billion.
And even if they do clean it up they are back to square zero in their quest for long term storage.