UNIT FOR CLEANING GAS STREAMS FROM VOLATILE CESIUM AND IODINE COMPOUNDS FORMED DURING HIGH-TEMPERATURE PROCESSING OF SPENT NUCLEAR FUEL Russian patent published in 2023 - IPC G21F9/02 

FIELD: nuclear industry.

SUBSTANCE: invention can be used in processes for localizing volatile fission products from exhaust gases at various high-temperature processing stages of irradiated nuclear fuel. The unit consists of two series-connected gas cleaning devices. The first device along the flow of the purified gas is equipped with a replaceable cartridge equipped with contact elements with an active layer made of a composition of aluminium and silicon oxides (30%γ-Al₂O₃ + 70% SiO₂), as well as a thermally insulated electric furnace for heating the purified gas to a temperature of 800-900°C. The second is a replaceable cartridge equipped with contact elements with an active substrate made of γ-aluminium oxide and a sorption-active component – silver nitrate, as well as a thermally insulated electric furnace for heating the purified gas to a temperature of 150-200°C.

EFFECT: disposing caesium and iodine separately as solid radioactive waste.

1 cl, 2 dwg