Darlington nuclear unit shut down after heavy water leak - Action News
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Darlington nuclear unit shut down after heavy water leak

A nuclear unit at the Darlington plant has been shut down following a leak of an estimated 7,000 litres of heavy water on Tuesday, OPG said.

OPG says no harm to employees or environment, no risk to public

A nuclear unit at the Darlington plant has been shut down following a leak of heavy water on Tuesday, Ontario Power Generation said.

The leak of an estimated 7,000 litres occurred during routine maintenance on the plant's Unit 2 heavy water transfer system, according to OPG spokesman Neal Kelly. The heavy water was contained and recovered.

"As a precautionary measure, staff near the incident area assembled and were accounted for and the unit was safely shut down," Kelly said in an email statement.

"There was no impact to the health and safety of employees or the public and there was no impact on the environment."

Kelly says OPG also informed the nuclear regulator about the leak Tuesday, as well as local mayors and fire and police departments around Darlington, which is on Lake Ontario, about 70 kilometres east of Toronto.

OPG expects to restart the unit on Thursday.

With files from The Canadian Press