Ugh. Couldn't they have tested that before storing the waste accordingly? Yet another proof that throughout the entire nuclear industry supply chain, the supposed safety measures are all just speculation—no one has ever really bothered to seriously investigate them. That's why new risks keep popping up that were previously unknown. But what do we do? Keep producing that garbage, keep hauling it across the country, keep storing it in unsuitable facilities. Until someday it goes bang. But of course the nuclear industry has nothing to do with it and everything is safe.
At Spiegel Online: Wissenschaft there's the original article.