The incident was reported recently by Atomic Energy of Canada, which said the leak posed “no threat to workers, the public, the environment or nuclear safety.”
A storm-related power outage affected the National Research Universal reactor at the Chalk River, Ontario, facility, about 110 miles west of Ottawa. The plant produces half of the world’s supply of medical isotopes used in diagnosing cancer and heart disease.
The regulator estimated the reactor would be out of service for about a month while repairs and testing are conducted. It said isotope shortages could occur.