Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Compagnie Generale Des Matieres Nucleaires

Olivier Pinet

Roger Boen

Agnès Grandjean

Jacques Lacombe

Christophe Girold

Sophie Schuller

Nicolas Bousquet

Jean-Luc Dussossoy

Philippe Gruber

Thierry Blisson

Hélène Rabiller

Jean-Luc Dussossdy

Bruno Penelon

Process for confinement of waste containing at least one chemical species to be confined, by in-can vitrification in a hot metal can into which waste and a vitrification additive are added, the waste and the vitrification additive are melted to obtain a glass melt which is then cooled, characterised in that at least one oxidising agent is also added into the metal can and in that the concentration of oxidising agent(s) expressed as oxide(s) in the glass melt is between 0.1 and 20% by mass, preferably 4 and 20% by mass, even more preferably 5 and 15% by mass, and even more preferably 10 and 13% by mass of the glass melt mass.

Process for waste confinement by vitrification in metal cans

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

The invention concerns a process enabling the complete combustion and oxidation of the mineral fraction of combustible waste contained in an apparatus intended to treat waste by direct incineration-vitrification, said process comprising the following steps:

Process for the complete combustion and oxidation of the mineral fraction of waste treated in direct incineration-vitrification apparatus

Growing community of inventors

Poulx, France

Olivier Pinet