FIXATION METHOD OF RADIOACTIVE CESIUM ISOTOPES AT HEAT TREATMENT OF RADIAOCTIVE WASTES (VERSIONS) Russian patent published in 2011 - IPC G21F9/28 

FIELD: power industry.

SUBSTANCE: fixation method of radioactive cesium isotopes at heat treatment of radioactive wastes (RW) involves preparation of the charge containing graphite, including ¹⁴C isotope, titanium dioxide, thermit mixture, as well as up to 25 wt % RW. Charge is mixed, loaded to tight reactor or container; above the main layer of charge there placed is additional layer of natural zirconium isotope with thickness of 1/6 thickness of the main charge layer or oxide of natural isotopes of silicon, titanium, aluminium and iron, with thickness of 1/5 to 1/3 of thickness of the main charge layer; and charge is heat treated.

EFFECT: possibility of performing high-temperature heat treatment of multi-component mixtures containing high-active RW including graphite-containing RW, with complete fixation of cesium evaporating during mixture heat treatment.

2 cl, 3 ex