During this outage, which will last approximately two months, workers will perform inspections and routine maintenance on a host of systems and components. Many of these activities cannot be performed while the unit is running and all are intended to ensure the safe and reliable production of electricity

 - By Stephen Heiser  -

Unit 6 at the Bruce B generating station was safely taken off line this evening to begin its planned maintenance and inspection program.

During this outage, which will last approximately two months, workers will perform inspections and routine maintenance on a host of systems and components. Many of these activities cannot be performed while the unit is running and all are intended to ensure the safe and reliable production of electricity.

Units 3, 4, 5, 7 and 8 remain at high power.

On Aprl 30th of this year unit 3 at the Bruce A generating station returned to service following its planned maintenance outage.

During the outage workers embarked on a number of initiatives that will extend the operating life of Unit 3 including boiler and turbine inspection, a successful West Shift campaign and extensive valve work.

In March, a long-term program to enhance safety margins and improve output at Bruce Power hit a major milestone earlier when reactor power on Unit 8 was raised to 93 percent.

Unit 8 is the last of the Bruce B Units to get a boost in output following fuel-loading modifications that allow operators to raise reactor power from 90 to 93 percent. The last time Unit 8 operated at 93 percent was August, 1995.

The increase was made possible by the completion of a process called core re-ordering which involves changing the direction in which fuel is inserted into the core. The resulting 25 megawatt increase will provide enough electricity to power 25,000 homes or a city roughly the size of Owen Sound, ON.

When Bruce Power assumed operational control of the site in 2001, the Bruce B units were held at 90 per cent of their design capability or 'nameplate rating'. This was to ensure that under some postulated accident conditions involving a loss of coolant, appropriate safety margins were maintained to ensure the safe shutdown of the unit. Following a thorough review of core re-ordering, the Canadian Nuclear Safety Commission approved the power increases.

Bruce Power is a partnership among Cameco Corporation, TransCanada Corporation, BPC Generation Infrastructure Trust, a trust established by the Ontario Municipal Employees Retirement System, the Power Workers’ Union and The Society of Energy Professionals.