Structural refinement and dispersion of high level radioactive contaminated soil processing by chemical interface controlled and high-speed shearing washing technique

Ishiyama, Shintaro

Chemical interface controlled dispersion and high-speed shearing water washing tests were implemented for the purpose of optimization of processing conditions with highly radioactive contaminated soils of over 570,000 Bq/kg in Fukushima and the following results were obtained. (1) Dispersion of the radioactive contaminated soil over 570,000 Bq/kg was enhanced in alkalized washing solution at babe equilibrium point of pH=10-11. (2) Refinement of contaminated soils was also promoted by collision of contaminated soil particles toward washing machine walls and inter-particle collision during soil washing process and remarkable washing performance was achieved under the combination of dispersion and high-speed shearing washing condition with 50% solid density in wash solution.