Bruce Power is officially beginning its first Major Component Replacement project.
The company said its operations team at the Bruce B nuclear generating station finished the rundown sequence for Unit 6 and took it offline.
"The Unit 6 project marks the next big step in a long campaign to revitalize this site," said President and CEO Mike Rencheck, in a news release.
Bruce Power said expanding the life of the Bruce Power site will inject $4 billion a year into the provincial economy and create and sustain 22,000 jobs.