Work is underway on a new project to support the decommissioning and restoration of Dounreay, described as ‘the world’s deepest nuclear clean-up’ Graham will be delivering the Civils and Structural works on behalf of Nuvia, acting as subcontractor and an influential partner on the Dounreay scheme. The Dounreay Shaft in Caithness was originally constructed in 1956 as a means of removing waste from the Dounreay site liquid effluent discharge tunnel excavation. The Shaft goes approximately 65m deep underground and was used to store radioactive waste until 1977. A connecting ‘stub’ tunnel linked the base of the Shaft to the effluent discharge tunnel. This was sealed in 1956 by the construction of a concrete plug to produce a watertight seal before the Shaft was then allowed to flood with groundwater.
PBC Today 3rd Dec 2020 read more »