EDF Energy said on 7 August that it was once again extending the outages at the UK’s Dungeness and Hunterston NPPs. Dungeness B Reactor 22 was taken offline for pre-planned outages in August 2018 followed by Reactor 21 the following month. During during maintenance work, on the two 520 MWe AGR reactors, problems with the main steam line and with corrosion were discovered and later issues involving the site’s boilers. Inspection revealed that several systems providing a safety function were “corroded to an unacceptable condition”. The corrosion has been rated level 2 on the International Nuclear and Radiological Events Scale (INES).
Nuclear Engineering International 12th Aug 2020 read more »