The Hunterston B nuclear power plant has ended its nearly 46 years of zero-carbon electricity generation for Scotland with the shutdown of Unit B2. The 495-MWe advanced gas-cooled reactor (AGR), which began commercial operation in March 1977, was taken off line on January 7. The station’s companion unit, the 490-MWe AGR B1, was shut down last November.
Under an agreement with the U.K. government signed on June 23, 2021, EDF Energy, owner and operator of Britain’s power reactor fleet, is responsible for defueling all seven of the U.K.’s AGR nuclear stations over this decade. (The agreement does not include Sizewell B, which houses a 1,098-MWe pressurized water reactor slated to continue operating until at least 2035, or Hinkley Point C, which is currently under construction.) EDF expects the defueling of the AGR facilities to take from three-and-a-half to five years.
Scheduled to follow Hunterston B into the defueling phase by July of this year is the two-unit Hinkley Point B plant in Somerset, England.