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

Commissariat a L'energie Atomique

Orano Cycle

Le Centre National De La Recherche Scientifique

Fabienne Audubert

Alexandre Allemand

Jean-Louis Lacout

René Pailler

Joelle Carpena

Julien Martinez

Nicolas Dacheux

Nicolas Clavier

Julien Cabrero

A process is provided for preparing a powder of an oxide of at least one metal, each metal having an oxidation number between (III) and (VI). This process comprises successively and in this order: A process is further provided for manufacturing a pellet of an oxide of at least one metal as well as to a powder and to a pellet obtained according to these processes and to uses thereof.

Process for preparing a metal oxide powder, process for manufacturing a metal oxide pellet, powder and pellet as obtained according to these processes and uses thereof

The invention relates to a nuclear fuel cladding totally or partially made of a composite material with a ceramic matrix containing silicon carbide (SiC) fibers as a matrix reinforcement and an interphase layer provided between the matrix and the fibers, the matrix including silicon carbide as well as at least one of the following additional carbides: titanium carbide (TiC), zirconium carbide (Zrc), and ternary titanium silicon carbide (TiSiC). When irradiated and at temperatures of between 800&#xb0; C. and 1200&#xb0; C., said cladding can mechanically maintain the nuclear fuel within the cladding while enabling optimal thermal-energy transfer towards the coolant. The invention also relates to a method for making the nuclear fuel cladding.

Nuclear fuel cladding with high heat conductivity and method for making same

A process for joining, by spark plasma sintering, at least two refractory ceramic parts, each of the parts having at least one surface to be joined by spark plasma sintering, in which surfaces to be joined are brought into contact without addition of any sort between the surfaces. Then, a joining pressure of 1 to 200 MPa is applied to the ceramic parts. A pulsed electric current having an intensity of 500 A to 8000 A is applied to the ceramic parts so as to raise the temperature of the parts to a joining temperature of at least 1300&#xb0; C. Then, the electric current is terminated simultaneously with the pressure, and the parts are cooled, and the joined parts are recovered.

Process for joining refractory ceramic parts by spark plasma sintering (SPS)

Process for the conditioning of radioactive iodine, particularly iodine

Growing community of inventors

Cadenet, France

Fabienne Audubert