Bruce Power nuclear reactor forced to return to shut down status due to leak

By Dorothy Davis 

The Canadian Nuclear Safety Commission has been advised of a moderator leak on Bruce A Unit 2 as it was being re-started following refurbishment. The Canadian Nuclear Safety Commission (CNSC) said it was advised on Saturday, March 17, 2012, of a moderator leak at the Bruce A Unit 2 nuclear reactor as it was being re-started following refurbishment. 

The incident follows TransCanada Corporation’s (TSX: TRP) (NYSE: TRP) Friday announcement that the Unit 2 reactor had received authorization from the CNSC to power up, effectively ending the construction and commissioning phases of the project.

According to the CNSC, operators at the plant took appropriate action by returning the unit to a shut down state while the issue is fully investigated. CNSC on-site staff was in the Main Control Room as planned at the time of the event and continues to monitor the situation. 

The leak was determined to be inside confinement and has been isolated. There was no release to the environment and no plant workers injured. 

Bruce Power, located near Kincardine, Ontario, Canada, is the largest nuclear facility in North America, and second largest in the world.  Bruce Power consists of two generating stations (Bruce A & B) with each station housing four nuclear power reactors. Six of those reactors are currently operational, producing more than 4,700 MW of power. 



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