NEW YORK (Reuters) - Ontario Power Generation shut the 515-megawatt Unit 8 at the Pickering nuclear power station in Ontario by Monday for short maintenance in the switchyard, a spokesman for the province-owned generating company said.
He could not say exactly when the unit would return to service due in part to competitive reasons. Electricity traders guessed the unit would return in about a week.
The 3,090-MW Pickering station is on the north shore of Lake Ontario in Pickering about 30 miles east of Toronto. There are two 515-MW units, 1 and 4, at the A station, which entered service in 1971, and four 515-MW units, 5 to 8, at the B station, which entered service in 1983.
Unit 4 shut by October 8 and will likely return in late October.
Unit 6 shut for maintenance by October 2 and would likely return in early December. Unit 6 last shut for maintenance from about September 15-November 28, 2007. It is on a 24-month cycle.
All of the other units were available for service.
OPG is in the middle of environmental and safety assessments for the proposed refurbishment of the Pickering B reactors.
One MW powers about 1,000 homes in Ontario.
OPG owns and operates more than 22,000 MW of generating capacity and markets power to utilities in Ontario and neighboring U.S. and Canadian electricity markets.
Reporting by Scott DiSavino; Editing by Lisa Shumaker