METHOD FOR RECOVERING SOLID RADIOACTIVE WASTES

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. M...

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Bibliographische Detailangaben
Hauptverfasser:	ZAKORZHEVSKIJ V.V, MERZHANOV A.G, BOROVINSKAJA I.P, BARINOVA T.V, RATNIKOV V.I
Format:	Patent
Sprache:	eng
Schlagworte:	DECONTAMINATION ARRANGEMENTS THEREFOR NUCLEAR ENGINEERING NUCLEAR PHYSICS PHYSICS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT TREATING RADIOACTIVELY CONTAMINATED MATERIAL
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Beschreibung
Zusammenfassung:	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