Canadian Manufacturing

Heavy water leak at Darlington nuclear reactor

OPG doesn't know the exact amount, but estimates about 7,000 litres of heavy water leaked during routine maintenance



TORONTO—Ontario Power Generation says there was no risk to its staff or the public after a leak of heavy water from Darlington’s Unit 2 nuclear reactor.

OPG spokesman Neal Kelly says they don’t know the exact amount but estimate about 7,000 litres of heavy water leaked during routine maintenance in the afternoon of April 14, while the reactor was running.

Kelly says all the heavy water was contained and recovered, and the reactor was safely shut down.

OPG assembled all the staff to make sure everyone was OK, and the utility says there was no impact to their health and safety or to the environment.

Further investigations into the leak from the heavy water transfer system at Darlington are underway.

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.

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