Workers at Hinkley Point C have achieved a milestone by installing Britain’s first new nuclear reactor in more than three decades. The 13-meter-long reactor pressure vessel (RPV), one of two planned for the site, will generate enough low-carbon electricity to power 3 million homes. Together, the two reactors will supply 7% of the UK’s electricity needs.
This achievement follows last year’s installation of the steel dome that sealed the reactor building. The newly installed reactor is the first since Sizewell B in 1991, marking a pivotal moment in the UK’s journey toward energy independence.
Energy Secretary Ed Miliband highlighted the project’s importance: “Installing the first reactor pressure vessel at Hinkley Point C is a significant feat of engineering and a major step forward for the UK’s most advanced nuclear project. Getting Hinkley up and running will be a win for energy independence, protect billpayers, and accelerate our progress toward net zero.”
The 500-tonne RPV, built by Framatome in France, arrived at Hinkley Point C in February 2023. After months in storage, it was installed on December 3, 2024, through a precisely coordinated operation. The RPV was guided onto rails, inserted through a 19.5-meter equipment hatch, rotated by an internal polar crane, and lowered onto a support ring with just 40mm of clearance on either side. Next year, it will be joined by four 25-meter steam generators.
Strict regulatory oversight from the Office for Nuclear Regulation ensured that the RPV met the highest technical and quality standards throughout manufacturing and installation.
Stuart Crooks, Managing Director of Hinkley Point C, emphasized the broader impact of this milestone: “This is an important moment for Hinkley Point C and for everyone working toward UK energy security and climate goals. The lessons learned during this installation will enhance efficiencies for the second reactor and future projects like Sizewell C. It’s also creating jobs, boosting skills, and supporting the UK’s growth agenda.”
The power station is rapidly advancing, with ongoing installation of critical equipment, including 360 kilometers of piping and 10,000 kilometers of cables. Once complete, Hinkley Point C will provide clean, reliable electricity for 6 million homes, supporting the UK’s net-zero ambitions and digital future.
