COMPONENT FOR A LARGE STRUCTURE ADAPTED FOR A THERMONUCLEAR FUSION REACTOR, ASSEMBLY METHOD AND ASSOCIATED REACTOR

The invention relates to a component C for a large structure, in particular for a thermonuclear fusion reactor, intended for being subjected to a variety of thermal flows and/or to a flow of high-energy particles, which can reach several hundred kilowatts per square metre or several megawatts per square metre, in particular at least 100 kilowatts per square metre or at least 1 megawatt per square metre, and for withstanding a variety of mechanical and/or thermal and/or chemical stresses. The component C is characterised in that it includes at least two components A and B, which also include a plurality of components Ai and/or Bj, arranged next to one another and/or behind one another and/or on top of one another, said component C also including a thin inert metal encapsulation sheet for sealing said component C and producing a vacuum therein in order to prevent the oxidation of the components A and B, which make up component C, during the subsequent use thereof, and in that said component C is formed by diffusion bonding, in particular by diffusion welding assisted by hot isostatic pressing (HIP) of said components A and B in said thin inert metal sheet.