초록 ▼

This invention relates to radioactive materials which are fixed, stored, entrapped, encapsulated, or otherwise rendered immobile in a glass matrix for extremely long periods of time. Radioactive material such as radioactive wastes are incorporated into a glass matrix by a process of “molecular stuff

This invention relates to radioactive materials which are fixed, stored, entrapped, encapsulated, or otherwise rendered immobile in a glass matrix for extremely long periods of time. Radioactive material such as radioactive wastes are incorporated into a glass matrix by a process of “molecular stuffing”a porous glass either with a radioactive gas which is tapered in the porous glass by dissolution during sintering of the pores of the glass, or with a salt solution containing radioactive material such as CsNO3, Sr(NO3), etc., or with a combination of both salt solution and radioactive gas, followed by drying and sintering of the pores of the glass whereby these radioactive materials upon chemical change to their oxides, excepting of course the noble gases which remain in molecular form, become a part of the integrated glass structure. The resulting glass article may have the radioactive material dispersed essentially homogeneously throughout the glass article, or there may be a layer free of such radioactive waste material over the entire surface of the glass article. In either case such glass articles demonstrate an extremely slow diffusion of the encapsulated radioactive material to the surrounding area.

대표청구항 ▼

A glass composition containing radioactive gas dissolved, encapsulated and immobilized in the glass matrix, said composition being characterized by: (a) containing at least 75 mol percent SiO2, (b) having high chemical durability to aqueous solution, and (c) containing radioactive gas selected from

A glass composition containing radioactive gas dissolved, encapsulated and immobilized in the glass matrix, said composition being characterized by: (a) containing at least 75 mol percent SiO2, (b) having high chemical durability to aqueous solution, and (c) containing radioactive gas selected from the group consisting of krypton, iodine, bromine, xenon, radon, and mixtures thereof dissolved and fixed in the silica structure of said glass composition whereby leakage of said radioactive gas to the environment at environmental temperature is prevented for extremely long periods of time.