The plant will support 400 jobs making the 38,000 pre-cast concrete segments, as well as tunnel heads, for Sizewell C’s three marine tunnels.
Sizewell C is bringing what was previously the former Hinkley Point C tunnel production site back into use, retaining existing infrastructure and drawing on the experience of teams that worked on the Somerset nuclear project.
The expansion will involve new concrete batching plants, cranes, storage areas, offices, welfare facilities and parking.
Early works are already underway, with the Civil Works Alliance employing 55 people at the site, alongside a further 86 supply chain workers.
Subject to planning conditions being met, full production is expected to start in 2028.
Completed tunnel components will be transported to Suffolk by rail and sea, helping Sizewell C meet its target of moving at least 60% of construction materials by these routes.
Nigel Cann, Sizewell C chief executive, said: “It’s also another great example of how we’re using the learnings from Hinkley Point C, which has seen significant advancements through off-site prefabrication, and taking them to the next level. By reusing existing infrastructure and experienced teams, we can reap the benefits across safety, quality, cost, and schedule.”
Sizewell C has already placed nearly £5bn of work with more than 1,000 UK suppliers.
