STABILISING MATERIAL AND METHOD OF PRODUCING THEREOF Russian patent published in 2009 - IPC G21F9/00 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions and methods of producing stabilising material, used in atomic power engineering for retaining spent nuclear fuel and solid radioactive wastes of atomic power stations. The stabilisation material contains a magnesium phosphate binder and a powdered part. The powdered part contains aluminium oxide (Al₂O₃), magnesium oxide (MgO) and a boron-containing component. The stabilising material contains the following, wt %: magnesium phosphate binder 56-66; powdered part 44-34; composition of the powdered part: Al₂O₃ 78-90; MgO 22-10; boron containing component (in terms of boron) 0-1; composition of magnesium phosphate binder: P₂O₅ 30-40; MgO 7-8.5; H₂O makes up the rest. The method of producing stabilising material involves mixing the powdered part with the binder at temperature not above 25°C, obtaining a fluid mixture with viscosity of 300-1000 cSt with subsequent solidification of the stabilising material. The mixture is used for retaining spent nuclear fuel or for other purposes during the "life-span" of the mixture in liquid state.

EFFECT: longer "life-span" in liquid state, increased mechanical strength and reduced acidity.

11 cl, 2 tbl