METHOD FOR CONDITIONING BOTTOM RADIONUCLIDE-CONTAINING DEPOSITS Russian patent published in 2015 - IPC G21F9/00 

FIELD: chemistry.

SUBSTANCE: method for conditioning bottom deposits includes their mixing with substance, providing their confining into ceramic matrix (potassium-magnesium-phosphate matrix), and exposure until setting stops. Mixing matrix materials is performed successively with suspension, containing bottom deposits. As substance, providing confinement of bottom deposits in form of ceramic matrix used are such components as potassium dihydrophosphate, magnesium oxide and water, as well as retardant with the following component ratio:KH₂PO₄:H₂O:Fe(NO₃):bottom deposit:(MgO:H₂O) = 3:0.6:0.04:1.5:2.4. As retardant Fe(NO₃)·9H₂O in ratio potassium dihydrophosphate retardant 25:1 is used. After filling container, vibration impact on mixture until temperature is levelled throughout container volume is performed.

EFFECT: absence of rate of radionuclide leaching from ceramic matrix after prolonged stay in water, which provides ecological safety in long-term storage of wastes.

3 cl, 1 dwg, 2 tbl