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Interaction of tritium plasma and defects in tungsten irradiated with neutrons

Journal of Nuclear Materials
Publication Date
DOI: 10.1016/j.jnucmat.2009.01.184


Abstract Multiplier effects of tritium plasma and neutron irradiation on microstructural evolution in tungsten were investigated using computer simulations based on a rate theory. The effects of irradiation temperature and dissociation energy of tritium-vacancy clusters on the interaction between tritium and defects were also investigated. At the lower temperature (473 K), vacancies trapped tritium to form tritium-vacancy clusters, which grew rapidly. When the irradiation temperature increased to 873 K, however, it was difficult for a tritium-vacancy cluster to absorb a new tritium, and thus, the concentration of tritium-vacancy clusters was about eight orders of magnitude lower than that at 473 K.

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