SUBSTANCE FOR IMMOBILIZATION OF BERYLLIUM CONTAINED IN HIGH-ACTIVE SOLUTIONS Russian patent published in 2018 - IPC G21F9/16 

FIELD: recycling and disposal of waste.

SUBSTANCE: invention relates to the processing of liquid radioactive solutions, in particular to the curing of highly active solutions containing beryllium and other stable and radioactive elements. As a substance for the immobilization of beryllium from highly active solutions, sodium aluminophosphate glass having the general formula: Na₂O-Me(I)₂O-BeO-Al₂O₃-Me_XO_Y-P₂O₅-B_X1O_Y1-El_X2O_Y2, where: Me(I) – monovalent metals, with the exception of sodium; Me – multivalent metals, except for beryllium and aluminum; El – non-metals, with the exception of phosphorus and boron; X, X1, X2, Y, Y1, Y2 – stoichiometric coefficients (1, 2, 3, 4, 5, 6, 7); at a content, mass.%: Na₂O + Me(I)₂O – from 20 up to 27; BeO – from 0,1 up to 5; Al₂O₃ + Me_XO_Y – from 15 up to 23; P₂O₅ + B₂O₃ – from 50 up to 57 (including B₂O₃ from 0 up to 6); El_X2O_Y2 – from 0 up to 10.

EFFECT: invention makes it possible to obtain a chemically stable and non-dusting substance capable of including beryllium.

1 cl, 4 tbl