METHOD FOR TREATMENT OF SULFURIC AMMONIUM RADIOACTIVE SOLUTIONS AND METHOD FOR IMMOBILIZING RADIONUCLIDE-CONTAINING DEPOSITS IN GLASS-CERAMICS Russian patent published in 2006 - IPC G21F9/16 G21F9/20 

FIELD: recovery of liquid radioactive wastes.

SUBSTANCE: proposed method for treatment of sulfuric ammonium radioactive solutions includes electrotype coagulation treatment involving passage of radioactive solutions through vibroliquefied iron-coke galvanic pair. Radioactive solution pH is corrected and radionuclide-containing deposit separated. In the process pH of radioactive solutions is corrected in two stages with deposit being separated after each stage. First-stage deposit is mixed up with montmorillonite clay and granules are molded. Then they are dried out and agglomerated to produce glass-ceramics wherein radionuclide-containing deposits are immobilized. Filtrate is treated with foam layer to blow off ammonia and then passed through natural ion-exchanger. Method for immobilizing radionuclide-containing deposit in glass-ceramics includes molding of granules of radionuclide-containing deposit mixed up with montmorillonite clay. Granules are molded in two stages. Core of granule of radionuclide-containing deposit mixed up with montmorillonite clay is produced during first stage and covered with shell of glass-ceramics based on homogeneous mixture of montmorillonite clay and quartz sand, during second stage, quartz sand content of mixture being 10 - 30 mass percent.

EFFECT: enhanced reliability of radioactive waste immobilization.

6 cl, 2 dwg, 1 tbl, 3 ex