METHOD FOR RECOVERING SOLID RADIOACTIVE WASTES Russian patent published in 2001 - IPC

FIELD: nuclear power engineering; recovery of cesium- and strontium- containing fuels. SUBSTANCE: crushed wastes are mixed up with charge containing calcium oxide, titanium, and titanium oxide, TiO₂ to Ti ratio being 1: 3, Al₂O₃ to SiO₂ ratio, 1:2; calcium nitrate and/or ferric oxide is used as oxidizer. Mixture prepared in the process is compressed and placed in pressurized reactor wherein it is subjected to heat treatment under self-spreading high-temperature fusion conditions by initiating burning reaction of charge component. End product of fusion is high- temperature ceramics whose main component is perovskite phase wherein cesium and strontium radionuclides are uniformly distributed and reliably immobilized. EFFECT: reduced power requirement, enhanced efficiency, provision for recovery of high-activity wastes. 4 cl, 1 tbl, 3 ex