Plans to dispose of spent nuclear fuel in underground tunnels has reached a major milestone with excavation work getting started on site in Olkiluoto in Finland following verification by the Radiation and Nuclear Safety Authority of Finland (STUK). The facility, which is owned and operated by Posiva, is claimed to be a world first and will initially have five tunnels that will be excavated over the next 18 months but the network of tunnels is expected to be expanded to around 100 during the 100 year operational period of the facility. The first five tunnels and access tunnels are being built by Finland-based contractor YIT. In total, Posiva expects to excavate 35km of tunnels measuring 4.5m in height and 3.5m in width. The longest tunnel in the facility will be the 360m access tunnel.
New Civil Engineer 11th May 2021 read more »