The activities of the group are concentrated on the investigation of volume diffusion and diffusion along high-diffusivity paths, on chemical diffusion under concentration gradients in multiphase materials and in weldments, on measurements of thermodynamic properties of alloys in solid state and calculation of thermodynamic characteristics and on investigation of diffusion of gasses in solids. Diffusion processes are studied close to surface of chosen Ni alloys for heat exchange systems of nucelar reactors expposed to molten cooling media (halide salts).