Atomic Energy of Canada Limited (AECL) decided not to resume operations of its NRU research reactor at the Chalk River Laboratories. The reactor was shut down on May 14, 2009 during a power outage in the area. Following the shutdown, on May 15, 2009, the operators discovered a leak of heavy water in the reactor, which prompted a decision to suspend the operations. As similar leak was detected earlier, in December 2008.

NRU reactor is one of the leading producer of Mo-99 isotope for medical purposes.