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Demineralized water leak from Pickering nuclear station no threat: officials

Reuters and the Canadian Press: Carola Vyhnak - March 16 2011

http://www.thestar.com/news/canada/article/954772--water-leak-at-pickering-nuclear-plant

A demineralized water leak at Pickering nuclear power plant contained “negligible radiation” and poses little risk, Ontario Power Generation said on Wednesday.

“No risk at all, really,” said spokesman Ted Gruetzner. “This is like a small drop in Lake Ontario. Not a concern at all.”

The leak of water circulating through an old spent fuel bay occurred late Monday after a pump seal failed. About 73,000 litres — enough to fill three-quarters of a backyard pool — was released from Pickering A generator.

While such a spill is uncommon, it’s categorized as “very low risk” because of the negligible amount of radiation, Gruetzner said.

With world attention riveted on the nuclear crisis in Japan, the Canadian Nuclear Safety Commission also said that the radiation posed little risk.

Pickering A has two operating Candu reactors. The nuclear plant, along with its sister plant Pickering B, produces enough energy to fuel a city of 1.5 million people.

Greutzner said the first order of business would be to find out why the seal failed, then replace it.

The commission and Environment Canada are monitoring the situation.

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Canada nuclear plant accident turns drinking water radioactive

March 14, 2011. Ontario Power Generation has notified Canada's federal nuclear regulator about the release of 73,000 litres of demineralized water into Lake Ontario at the Pickering A nuclear generating station.

The leak occurred at 11:30 p.m. ET on Monday at the plant located about 35 kilometres east of Toronto and was caused by a pump seal failure.

"The radiological risk to the environment and people's health is negligible," the Canadian Nuclear Safety Commission said in a statement.

The nuclear regulator and Environment Canada are monitoring the situation, the statement said.

Andrew Nichols of CBC News reported about the leak on Wednesday afternoon and said he spoke to an Ontario Power Generation spokesperson who told him the risk is minimal but that such leaks are not supposed to occur.

Nichols also spoke to Gordon Edwards of the Canadian Coalition of Nuclear Responsibility.

"In his words, 'What the hell is considered negligible?'" Nichols reported. "[Edwards] is concerned that it's the nuclear industry that is telling you and I and telling the public what is considered to be negligible but he's concerned that we don't have a proper sense of what negligible is," reported Nichols.

Nichols also reported that the leak could be a concern because Lake Ontario is the main source of drinking water for millions of people who live along the lake.

The leak comes as the world is watching Japan's unfolding nuclear crisis, as multiple reactors face cooling system failures and possible meltdowns in the wake of Friday's earthquake and tsunami.
Pickering A is the first of four reactors at the nuclear plant just east of Toronto. It went into service in 1971 and continued to operate safely until 1997, when it was placed in voluntary lay-up as part of what was then Ontario Hydro's nuclear improvement program.