Chemical interface controlled dispersion and high-speed shearing washing techniques for radioactive contaminated soil; 4th report of field test in Fukushima

Ishiyama, Shintaro; Mamitani, Masataka*; Kondo, Mitsunori*

Chemical interface controlled dispersion and high speed shearing (CDS) washing verification test of high level radioactive contaminated soil over 570,000 Bq/kg was conducted using three kinds of radioactive contaminated soils of school ground, moor and road in FUKUSHIMA and the following results was obtained. (1) Washing rate of three kinds of contaminated soils reached up to 6098% after 60minitues CDS water washing. (2) Recovered amounts of reclamation soils of three type of soils ( 8,000Bq/kg) were 6082wt.%. Especially, 506 Bq/kg 33wt.% was achieved in the case of contaminated soil of moor. (3) Volume reductions of 6085wt% were achieved in every case of contaminated soils. (4) Contain recoverable quantities of total radioactive sources contained in soils was over 90%. (5) Main FP trapping minerals contained in contaminated soil of school ground is lamellar silicate and that of moor and road is mordenite.