Commissariat a L'energie Atomique

Areva Nc

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Sophie Schuller

Agnès Grandjean

Olivier Pinet

Nicolas Bousquet

Jean-Luc Dussossoy

Agnés Grandjean

Thierry Advocat

Thierry Blisson

An alumino-borosilicate glass for the confinement, isolation of a radioactive liquid effluent of medium activity, and a method for treating a radioactive liquid effluent of medium activity, wherein calcination of said effluent is carried out in order to obtain a calcinate, and a vitrification adjuvant is added to said calcinate.

Alumino-borosilicate glass for the confinement of radioactive liquid effluents, and method for treating radioactive liquid effluents

The present invention relates to a process for the manufacture of a glass frit for the containment by vitrification of a material comprising at least one oxidizable or reducible chemical species, and also to a process for the containment of said material by vitrification. The process for the manufacture of the glass frit comprises a step of incorporating into a raw glass frit at least one redox couple, the nature and the amount of which make it possible to maintain said at least one chemical species in its oxidized or reduced state. The containment process comprises mixing and hot melting the resulting glass frit and the material to be contained. The present invention makes it possible to optimize the containment of pollutants such as radionucleides, metals and metalloids. The material may be nuclear waste or a material derived from the incineration of household refuse.

Method for confining a substance by vitrification

Growing community of inventors

Chusclan, France

Sophie Schuller