Fixation of radioactive materials in a glass matrix

Details Fixation of radioactive materials in a glass matrix Fixation of radioactive materials in a glass matrix

G - Physics

21

F

31/85

G21F 9/34 (2006.01) C03C 4/00 (2006.01) C03C 23/00 (2006.01) G21F 9/30 (2006.01)

Patent

CA 1110051

FIXATION OF RADIOACTIVE MATERIALS IN A GLASS MATRIX ABSTRACT OF THE DISCLOSURE This invention relates to radioactive materials which are fixed, stored, entrapped, encapsulated, or other- wise rendered immobile in a glass matrix for extremely long periods of time. Radioactive material such as radio- active wastes are incorporated into a glass matrix by a process of "molecular stuffing" a porous glass either with a radioactive gas which is trapped 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 sin- tering 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 radio- active 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.

300264

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