An hour prior to synchronization to the grid last week, an issue was identified within the electrical generator on the non-nuclear side of the plant. The electrical generator protection worked as designed and the approach to connect to the grid was stopped. This generator, common to all power plants, had been upgraded as part of the refurbishment project by Siemens Canada.
Following initial inspections throughout this week, it is clear repairs will need to be made to this electrical generator. Bruce Power has enlisted the expertise of Siemens Canada to assess the situation and then complete repairs as soon as possible. Although the Unit 2 reactor is ready to operate, the repair to this non-nuclear system will have an impact on when Unit 2 will be able to deliver electricity to the grid.
Other activities at Bruce A are proceeding as planned. Within days, Unit 3 will return to operations following the completion of an outage that commenced in November, 2011, where we made a $300 million investment to extend the life of the unit by another decade. Bruce Unit 4 continues its record run and is currently rated as one of the top CANDU nuclear units in the world.
“While this is clearly seen as a setback, with this repair isolated to one non-nuclear system on Unit 2, we can continue to advance the Unit 1 work program,” said Mike Burke, Vice-President Bruce A Operations. “We shouldn’t lose sight of the fact that, in parallel, Unit 4 continues its record run, which is approaching 500 days of continuous operation, and Unit 3 is coming back from a major investment outage that will extend its life by up to 10 years. This strong performance, combined with our Bruce B units, will ensure continued system reliability in the province.”
This delay will not have an impact on Ontario’s electricity system reliability due in part to the strong performance of Bruce Power’s operating fleet, nor is it expected to materially change the cost of the Restart Project. Ontario ratepayers will not be impacted as Bruce Power accepted project risk over $3.4 billion in July, 2009, through its agreement with the Ontario Power Authority (OPA).
Siemens Canada and Bruce Power will work together to repair this non-nuclear system on Unit 2, while the overall operational focus will now be on the completion of the Unit 1 return to service program that continues to advance. Unit 1 is still on track to return to service in the third quarter.
For more information on Bruce Power, definitions of technical terminology and the difference between nuclear and non-nuclear systems download ‘A Guide to Bruce Power’.
About Bruce Power
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.
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