RADIOACTIVE WASTE LIQUID TREATMENT SYSTEM AND METHOD FOR TREATING RADIOACTIVE WASTE LIQUID

摘要

Provided is a radioactive waste liquid treatment system whereby an α-nuclide remover for removing α nuclides contained in radioactive waste liquid can be made compact. Crud included in radioactive organic waste containing a positive ion exchange resin is dissolved using an organic acid aqueous solution (S1). The organic acid aqueous solution is exposed to ozone to decompose the organic acid (S4). α nuclides adsorbed on the radioactive organic waste in which crud has been dissolved are eluted by an organic acid salt aqueous solution (S2). The organic acid salt aqueous solution is exposed to ozone to decompose the organic acid salt (S4). A pH adjuster (acid, alkali, reducing agent, oxidizing agent for water conditioning) is poured into the radioactive waste liquid containing the α nuclides, generated in S4 (S5). A colloid of the α nuclides is formed in the radioactive waste liquid, which has been pH-adjusted to a range of no less than 4 to less than 8 by the pH adjuster. The colloid is removed using a filter (S6). Ions of the α nuclides contained in the radioactive waste liquid discharged from the filter are removed by an α-nuclide remover (S7).