Patent ID: 9305672
Filing Date: 2016-04-05
CPC Classification: C03C,C04B,G21F

Claim Text:
1. A method of immobilizing a radioisotope comprising the steps of: (a) combining a radioisotope-containing material, MgO, a source of phosphate, and optionally, a reducing agent, in water at a temperature of less than 100° C. to form a slurry; (b) curing the slurry to form an intermediate chemically bonded phosphate ceramic (CBPC) article comprising the waste material therefrom; (c) comminuting the intermediate ceramic into fine particles; (d) mixing the fine particles of CBPC with borosilicate glass frits; and (e) heating the mixture resulting from step (d) at a temperature in the range of about 900 to about 1500° C. to form a vitrified CBPC article comprising the radioisotope immobilized therein.