EDF Energy prolongs outages at Dungeness and Hunterston units. The restarts of three advanced gas-cooled reactor (AGR) units at EDF’s Dungeness B and Hunterston B nuclear power plants in the UK have been postponed. Dungeness Reactor 22 and Reactor 21 were taken offline, respectively, on 27 August and 19 September, 2018 – for pre-planned outages. During that work, EDF uncovered issues to do with the main steam line and then corrosion. In recent months attention has been focused on issues to do with the site’s boilers. Restart dates were 11 September for Reactor 22 and 21 September for Reactor 21, but these were re-forecast yesterday as 10 December for Reactor 22 and 20 December for Reactor 21. Hunterston Reactor 3 and Reactor 4 were taken offline on 9 March and 3 October, 2018 to work on issues related to their graphite cores. Following the approval of a safety case with the ONR, Reactor 4 was returned to service on 25 August, 2019 until 10 December, 2019. Hunterston Reactor 3 had been due to restart on 20 August, but that has now changed to 30 August. The restart date for Reactor 4 remains 17 September.
World Nuclear News 7th Aug 2020 read more »