Luckily this one happens to be deisel powered
"A major rescue effort has been launched off Ireland after a Canadian submarine asked for assistance."
"The Canadian Defence Force said HMCS Chicoutimi had suffered a mechanical failure and its crew were all safe. "
...
"The submarine, which was bought from Britain, is not nuclear-powered or carrying nuclear warheads.
The request for assistance came from the vessel some 100 miles north west of Ireland. "
...
So because this one happens to be non-nuclear we are expected just to awe at the resuce effort and not worry?