Calder Hall, which opened on 17 October 1956, is continuing to make history as its decommissioning progresses. The site, located in West Cumbria, was the world's first commercial nuclear power station and played a crucial role in establishing the UK's civil nuclear industry.
Opened by Her Majesty the Queen, Elizabeth II, Calder Hall's four Magnox reactors generated electricity for 47 years before closing in March 2003. Its design influenced other Magnox power stations globally and it became a recognisable landmark in the region.
Today, Calder Hall has transitioned to a new role. With all fuel removed from its reactors – confirmed in 2019 – work is focused on dismantling redundant buildings and equipment. This planned sequence of decommissioning involves isolating plant and services, removing hazards such as asbestos, and making buildings safe for demolition.
Significant work has already been completed, including the removal of all 40,000 fuel rods from the four reactors, the dismantling of cooling towers, and the removal of thousands of tonnes of asbestos. These efforts have transformed Calder Hall from an operational power station into a decommissioning site.
Beyond removing redundant structures, the demolition serves a practical purpose for Sellafield's future. Limited land at Sellafield necessitates space for new facilities and infrastructure, including support for the SIXEP Continuity Plant. This allows a site from the UK's early nuclear programme to facilitate its next phase.
Calder Hall is providing invaluable experience for Sellafield and the wider NDA group in safely dismantling nuclear power stations. Lessons learned regarding changing safety plans, safe demolition practices, and land preparation for future use will benefit other decommissioning projects.
Seventy years on, Calder Hall's contribution continues as teams work to safely complete its final chapter and make way for the nation's future energy needs.
