HOUSTON (Reuters) - Three of Ontario Power Generation's 490-megawatt units at the Nanticoke coal-fired power station in Ontario returned to service by early Tuesday, the Independent Electricity System Operator said in a report.
Nanticoke 7 returned after a two-month outage while Units 5 and 6 returned after short periods.
Two other Nanticoke units, also rated at 490 MW, are currently shut for maintenance.
Unit 3 shut Monday and is expected to return to service in by mid-April and Unit 8 is shut for a longer-term period.
Nanticoke is located on the north shore of Lake Erie, about 80 miles southwest of Toronto.
Reporting by Eileen O'Grady; Editing by David Gregorio