A tunnel boring machine breaks through ground material to remove it, forming a tunnel in the process with concrete segment rings.
At Hinkley Point C...
There will be three large tunnel boring machines and one smaller tunnelling kit that will be operating at Hinkley Point C.
The three largest machines will be forming the two intake tunnels, which will bring cold water from the Bristol Channel into the power station, and one outfall tunnel to send the water back. The other smaller kit will be excavating a tunnel to form the fish return system.
The first tunnel boring machine started its operation to construct the first of the intake tunnels September 2019 and will continue for 12 months.