ITER – Bringing it altogether for a DEMO
Experts at Culham Centre for Fusion Energy (CCFE) have carried out the first-ever integrated assessment of the life expectancy of materials in a full-scale fusion power plant design.
The study focused on the effects caused by the build-up of helium in fusion materials. When neutrons from fusion reactions hit the materials in reactor components, they trigger nuclear reactions that cause transmutation (the changing of elements to form new ones). Helium is one of the gases produced by such reactions. The accumulation of helium causes swelling and embrittlement of materials—leading to fracture—and is one of the factors expected to limit the lifetime of components in a fusion power plant.
Materials modellers Mark Gilbert and Sergei Dudarev, working with CCFE specialists in nuclear data and neutron transport (Lee Packer, Jean-Christophe Sublet, and Shanliang Zheng) have conducted a pioneering study in which a…
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