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Calder Hall Marks 70 Years as Decommissioning Progresses at Sellafield

Calder Hall, the world's first nuclear power station, is marking its 70th anniversary today, 16 October 2026, as decommissioning work continues at the Sellafield site.

  • Calder Hall, the world's first nuclear power station to provide domestic electricity, was opened by Queen Elizabeth II on 16 October 1956.
  • The facility stopped generating electricity in 2003, and its decommissioning is creating space for Sellafield's future mission.
  • Plans are emerging for Pioneer Park, a new clean energy development on NDA-owned land next to the Sellafield site.

Calder Hall, the world's first nuclear power station, is celebrating 70 years since its opening by Queen Elizabeth II on 16 October 1956. The facility, located at Sellafield, was the first to provide domestic electricity from nuclear power.

Although Calder Hall ceased generating electricity in 2003, its decommissioning is progressing. This work involves defueling reactors, removing major hazards, and dismantling redundant plant and structures. The aim is to create space for Sellafield's future operations and support the next phase of its clean-up mission.

Energy Minister Michael Shanks noted that nuclear power has helped provide electricity for millions of Britons since Calder Hall opened. Euan Hutton, Sellafield Ltd CEO, stated that decommissioning the station and reducing hazards is creating necessary space on the site.

Looking ahead, plans are developing for Pioneer Park, a new clean energy development adjacent to the Sellafield site on land owned by the Nuclear Decommissioning Authority (NDA). This project aims to build on the area's nuclear expertise to create opportunities for new technologies, jobs, and investment.

Why this matters: The decommissioning of Calder Hall is crucial for creating space at Sellafield to support its future mission and clean-up efforts, while also maintaining nuclear skills and capabilities in the UK.

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