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

Maxime Zabiego

Patrick David

Alain Ravenet

Cédric Sauder

Christophe Lorrette

Denis Rochais

Philippe Guedeney

A new interface between the cladding and the stack of pellets in a nuclear control rod. According to the invention, an interface joint made of a material transparent to neutrons, in the form of a structure with a high thermal conductivity and open pores, adapted to deform by compression across its thickness, is inserted between the cladding and the stack of pellets made of BC neutron absorber material over at least the height of the stack. The invention also relates to associated production methods.

Solid interface joint with open pores for nuclear control rod

The invention relates to a multilayer tubular part () comprising a metal layer forming a metal tubular body () and two layers in ceramic matrix composite material covering the metal tubular body, wherein one of the two layers in ceramic matrix composite material covers the inner surface of the metal tubular body to form an inner tubular body (), whilst the other of the two layers in ceramic matrix composite material covers the outer surface of the metal tubular body to form an outer tubular body (), the metal tubular body therefore being sandwiched between the inner and outer tubular bodies. The metal tubular body is in metal or metal alloy. Finally, the metal tubular body has a mean thickness smaller than the mean thicknesses of the inner and outer tubular bodies. A said part is useful in particular for producing nuclear fuel claddings.

Multilayer tube in ceramic matrix composite material, resulting nuclear fuel cladding and associated manufacturing processes

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Pierrevert, France

Maxime Zabiego