'There was no cover-up' of nuclear reactor leak
OTTAWA, CANADA - The head of the Canadian Nuclear Safety Commission said he did not feel compelled to alert the public about a nuclear reactor leak last year and was surprised by the attention it received.
"We were caught by surprise at the level of interest that the events generated," commission president Michael Binder told the House of Commons standing committee on natural resources. "There was no cover-up. There were no risks to health, safety or the environment from these events."
The nuclear reactor at Chalk River had to extend an outage in December for what operator Atomic Energy of Canada Ltd. said at the time were technical problems.
It emerged last month that 47 kilograms of heavy water had leaked into a sump. About 4.5 kg of radioactive tritium also evaporated.
Binder said the company alerted nuclear safety officials immediately. After a "rigorous international protocol for when you alert the public," the organizations decided not to release the details.
"In the future we will report more on things that we have deemed in the past to be routine," Binder said, noting the commission posted information February 24 about a small leak discovered February 22.
Binder dismissed a suggestion from Liberal energy critic David McGuinty that a government order gave the commission a dual mandate to include considering the need for medical isotopes.
"We have one mandate, and if you think that we are not going to shut down a facility that is unsafe, I think you are making a mistake," he said.
Related News

Mike Sangster to Headline Invest in African Energy Forum
PARIS - Mike Sangster, Senior Vice President for Africa at TotalEnergies, will play a pivotal role in the upcoming Invest in African Energy (IAE) Forum, which will take place in Paris on May 13-14, 2025. As a key figure in one of the world’s largest energy companies, Sangster's participation in the forum is expected to offer crucial insights into Africa’s evolving energy landscape, particularly in the areas of oil, gas, and renewable energy.
TotalEnergies' Role in Africa's Energy Landscape
TotalEnergies has long been a major player in Africa’s energy sector, driving development across both emerging and established markets. The company…