FIELD: handling radioactive wastes. SUBSTANCE: clean water meeting sanitary standards and concentrated solution of liquid radioactive wastes suitable for recovery are produced using methods of reconditioning. Freezing process is conducted in tank concurrently with mixing up liquid radioactive wastes at linear velocity of maximum 0.8 m/s while heating inner bottom of this tank with temperature maintained between 0.5 and 1 C. Freezing is started as soon as daily subzero temperature of at least -3 C is attained in at least 48 hours. Ice formed in the process is accumulated in decontamination tank. Source solution of liquid radioactive wastes is mainly frozen by natural cooling. Device implementing proposed method has metered pouring unit incorporating coarse filter unit for source liquid radioactive wastes, metering pump with valve and metered pouring mechanism, conveying platform, lifting-and- discharging unit, storage tank provided with salt-metering sensor, and decontamination tank with ice showering unit. Decontamination tank has water final decontamination unit with pump, valve, and ion-exchange filter, as well as clean water delivery pipeline. Tank is equipped with radioactivity sensor. Device also has clean-water storage tank with radioactivity sensor and concentrated radioactive solution storage tank also provided with radioactivity sensor. EFFECT: enhanced economic efficiency, reduced power requirement and labor consumption. 3 cl, 2 dwg
