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

Jean-Marc Leibold

Michel Planque

Charlotte Bernard

André Chatroux

Emmanuel Rigal

Patrice Tochon

Fabien Vidotto

Lionel Cachon

Philippe Bucci

Raphaël Couturier

Marie Petitjean

Isabelle Moro-Le Gall

Pierre-Eric Frayssines

Sébastien Chomette

A method for producing heat exchangers having at least two fluid circuits each having channels, including the following steps: producing one or a plurality of elements of a first fluid circuit, each element having at least two metal plates, at least one of which has first grooves; stacking the at least two metal plates of each element in such a way that the first grooves form the channels of the first circuit; assembling each element of the first circuit by diffusion welding between the two stacked metal plates; producing one or a plurality of elements of at least one second fluid circuit, each element of the second circuit having at least a portion of the channels of the second circuit; assembling, either by diffusion welding, or by brazing, or by diffusion brazing between the element or elements of the first circuit and the element or elements of the second circuit.

Method for producing a heat exchanger module having at least two fluid flow circuits

The present invention relates to an novel method of producing heat exchangers having at least two fluid circuits each comprising channels, the method employing diffusion bonding achieved using the hot isostatic pressing (HIP) technique, and to a heat exchanger obtained using this method.

Method for producing a heat exchanger module with at least two fluid circulation circuits and heat exchanger obtained using this method

A nuclear fusion reactor first wall component includes a copper alloy element, an intermediate metal layer made from niobium and a beryllium element, directly in contact with the intermediate metal layer. The intermediate niobium layer is further advantageously associated with a mechanical stress-reducing layer formed by a metal chosen from copper and nickel. This mechanical stress-reducing layer is in particular arranged between the intermediate niobium layer and the copper alloy element. Furthermore, when the mechanical stress-reducing layer is made from pure copper, a layer of pure nickel can be inserted between the niobium and the pure copper before diffusion welding. Such a component presents the advantage of having an improved thermal fatigue behavior while at the same time preventing the formation of intermetallic compounds at the junction between the beryllium and the copper alloy.

Nuclear fusion reactor first wall component and production process thereof

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Pont de Claix, France

Jean-Marc Leibold