Nuclear properties of Tungsten under 14 MeV neutron irradiation for fusion-fission hybrid reactors

•The multiplicative channels (n,xn) are at 14 MeV neutrons.•The transmutation cycle shows the accumulation of Osmium and Rhenium.•Tungsten shows to be a good neutron reflector even in thin slabs. Monte-Carlo simulations were performed to study the behavior of Tungsten under 14 MeV neutron irradiatio...

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Bibliographic Details
Published in:Annals of nuclear energy 2020-11, Vol.147, p.107739, Article 107739
Main Authors: García Gallardo, J.A., Giménez, M.A.N., Gervasoni, J.L.
Format: Article
Language:English
Subjects:
Fast neutron
Hybrid reactors
Nuclear fusion
Tungsten
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Summary:•The multiplicative channels (n,xn) are at 14 MeV neutrons.•The transmutation cycle shows the accumulation of Osmium and Rhenium.•Tungsten shows to be a good neutron reflector even in thin slabs. Monte-Carlo simulations were performed to study the behavior of Tungsten under 14 MeV neutron irradiation. At this energy, its multiplicative properties become relevant, especially due to the (n,2n) channel, but many other reactions are also present and a transmutation cycle can be drawn, showing the accumulation of metallic byproducts like Rhodium and Osmium. Also, a three-layer model was used to describe the interfaces within a schematic hybrid fusion-fission reactor to simulate the neutron transmission and reflection, showing that Tungsten can be a very useful material for a fission-breeding interface.
ISSN:0306-4549
1873-2100
DOI:10.1016/j.anucene.2020.107739