They're absolutely safe. The upgraded Canadian security regimes started after the 9/11 events. We have very highly secured facilities. I can't go into a lot of details in an open forum such as this, but suffice it to say that the full range of standard security techniques are put in place so there'll be barriers, defences, and detention mechanisms. I must stress that at the class I facilities, the nuclear power plants, we have armed on-site response forces. They essentially are army-level trained in terms of tactics and response strategies.
On February 11th, 2013. See this statement in context.