Clay Technology

Clay Technology, part of Mitta Group, is a firm of consultants in soil and rock engineering with offices and lab at IDEON Research Center in Lund, Sweden. 

The staff is specialised in clay-based barriers for waste disposal as well as rock engineering. We have been the main consultant to SKB (Swedish Nuclear Fuel and Waste Management Co) regarding the design and behaviour of clay-based engineering barriers and backfills in geological repositories since 1988. 

Today we provide laboratory and modelling services to nuclear waste organizations in many different countries. Some of our clients are SKB (Sweden), POSIVA (Finland), NWMO (Canada) and RWM (UK) but we also provide services to other companies in Sweden and abroad. 

Clay Technology has a large laboratory for testing clay and soil in different scales. The laboratory is equipped to test the physical, chemical and mineralogical properties of clays and soils as well as to analyze their thermal, hydraulic and mechanical properties. While our main expertise lies in analyzing bentonite clay, we also carry out testing of other clays and soils.

As part of Mitta Group, we provide geotechnical laboratory services to the construction industry. 


Clay Technology’s consultants has expert capabilities in modelling of both clay and rock in underground waste repositories. The clay modelling department use FEM codes to analyze the transport of heat and liquids in clays and soils, as well as their mechanical behavior.

The rock mechanics modelling department use a variety of different codes (FEM, DEM) to analyze the behavior of the rock mass around nuclear waste repositories.

Some of our partners
SKB: Swedish Nuclear Fuel and Waste Management Co. SKB is managing Swedish nuclear and radioactive waste.
Posiva Oy is Finland’s correspondence to SKB. Posiva is responsible for the final disposal of spent nuclear fuel of the owners.
VTT: Technical Research Centre of Finland.
Nagra: National Cooperative for the Disposal of Radioactive Waste. Nagra is the Swiss correspondence to SKB.
The Nuclear Waste Management Organization (NWMO) is responsible for designing and implementing Canada’s plan for the safe, long-term management of used nuclear fuel.
RWM works to deliver a geological disposal facility and provide radioactive waste management solutions in the United Kingdom.
Jacobs is an American international technical professional services firm. Clay Technology is engaged in projects with Jacobs UK branch on projects relating to nuclear waste management.