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EDF extends outage at UK reactor where cracks found

22 November 2018

EDF Energy has extended an outage at the no. 3 reactor at Hunterston B nuclear power station in Scotland, offline since March when cracks were found in its core, until February 21. The reactor was initially scheduled to return to service on November 17, later pushed back until December 18. The cracks were found in graphite bricks used to control the nuclear reaction within the reactor. 

Hunterston B nuclear power station - Image: EDF Energy
Hunterston B nuclear power station - Image: EDF Energy

EDF Energy said it had extended the outage to prepare a safety case needed for Britain’s nuclear regulator, the Office for Nuclear Regulation (ONR), to allow the unit to restart.
Hunterston 4 has also been closed for a routine graphite inspection. It is expected to return to service on January 14.

In another incident at a UK nuclear power station, the ONR said on November 20 it was investigating an industrial incident at the Heysham 1 nuclear power station in Lancashire in which three workers were injured. It said it would not comment further at this stage as its enquiries were continuing.

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