Unit 1 at the Wolsong nuclear power plant in South Korea has been restarted following the completion of a refurbishment of the pressurized heavy water reactor (PHWR). It marks the first time that a Candu-6 reactor has been successfully dismantled, retubed and restarted. The 679 MWe reactor to operate for a further 25 years. It took 839 days to refurbish (started in 2009).
At the Bruce A units in Canada – which features earlier, larger (769 MWe) Candu models – AECL has completed the retubing of unit 2 and received regulatory approval on 30 June 2011 to start reloading fuel into the reactor. It is expected to be reconnected to the grid by the end of the year. Refurbishment work of unit 1 is also nearing completion and that unit is expected to be reconnected to the grid in early 2012.