Microstructural evolution of irradiated tungsten: Ab initio parameterisation of an OKMC model

It is important to develop an understanding of the evolution of W microstructure under the conditions expected in the International Thermonuclear Experimental Reactor as well as the DEMOnstration Power Plant, Modelling techniques can be very helpful in this regards. In this paper, an object kinetic...

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Veröffentlicht in:Journal of nuclear materials 2010-08, Vol.403 (1), p.75-88
Hauptverfasser: Becquart, C.S., Domain, C., Sarkar, U., DeBacker, A., Hou, M.
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container_end_page 88
container_issue 1
container_start_page 75
container_title Journal of nuclear materials
container_volume 403
creator Becquart, C.S.
Domain, C.
Sarkar, U.
DeBacker, A.
Hou, M.
description It is important to develop an understanding of the evolution of W microstructure under the conditions expected in the International Thermonuclear Experimental Reactor as well as the DEMOnstration Power Plant, Modelling techniques can be very helpful in this regards. In this paper, an object kinetic Monte Carlo code has been parameterised on ab initio calculations to model the behaviour of helium atoms implanted in tungsten, in the presence or not of the point defects created during the implantation. The slowing down of atomic helium in tungsten as well as the associated Frenkel Pair production is determined using the Marlowe code and is described in a paper companion to this one. The OKMC simulations indicate that He desorption results from a competition between the formation of mobile clusters and sessile ones, and it is thus very important to model correctly their spatial distributions as well as their properties.
doi_str_mv 10.1016/j.jnucmat.2010.06.003
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subjects Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Engineering Sciences
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Materials
Nuclear fuels
title Microstructural evolution of irradiated tungsten: Ab initio parameterisation of an OKMC model
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