They say here they attempted to mine BTC:
http://www.bbc.com/news/world-europe-43003740
But the whole story is rather unconvincing. Mining Bitcoin is probably the worst choice in this case and I doubt anyone would be so naive to try to connect such a complex machine to the Internet without taking some precautions first.
I read the story on 4 different news sites. The ones going more technically into the topic never used BTC. Agree, would be so stupid to mine Bitcoin instead of many other options... I believe many people do not realize yet that the BTC only represents 35% of the crypto market cap
Also they were saying that the superconputer was from time to time connected to the internet, but a lot of special approvals were needed before the connection. I suspect it was not used only for nuclear simulations, but probably also for data processing (social profiling?)....