Influence of modified neutron emission spectrum on tritium production performance in blanket systems with NBI-heated deuterium plasma

Tomoki Urakawa; Hideaki Matsuura; Yasuko Kawamoto; Satoshi Konishi

doi:10.1016/j.fusengdes.2018.03.056

Influence of modified neutron emission spectrum on tritium production performance in blanket systems with NBI-heated deuterium plasma

Tomoki Urakawa, Hideaki Matsuura, Yasuko Kawamoto, Satoshi Konishi

Nuclear Energy Systems

Research output: Contribution to journal › Article › peer-review

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Abstract

In high-temperature plasma sustained by neutral beam injection heating, the emission spectrum of the neutrons produced by fusion reactions is known to have a modified Gaussian distribution. In this study, neutron transport simulation is carried out for a plasma source that emits neutrons with a modified spectrum and the influence of this modified neutron emission spectrum on the tritium production performance is investigated. The results show that in tritium production using D(d,n)³He neutrons, the rate of the ⁹Be(n,2n)2α neutron multiple reactions, which has a threshold energy of 2.0 MeV, is significantly enhanced compared with that when a source with a Gaussian neutron emission spectrum was assumed. In addition, the influence of the blanket composition on the tritium production performance is discussed.

Original language	English
Pages (from-to)	678-682
Number of pages	5
Journal	Fusion Engineering and Design
Volume	136
DOIs	https://doi.org/10.1016/j.fusengdes.2018.03.056
Publication status	Published - Nov 2018

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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10.1016/j.fusengdes.2018.03.056

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title = "Influence of modified neutron emission spectrum on tritium production performance in blanket systems with NBI-heated deuterium plasma",

abstract = "In high-temperature plasma sustained by neutral beam injection heating, the emission spectrum of the neutrons produced by fusion reactions is known to have a modified Gaussian distribution. In this study, neutron transport simulation is carried out for a plasma source that emits neutrons with a modified spectrum and the influence of this modified neutron emission spectrum on the tritium production performance is investigated. The results show that in tritium production using D(d,n)3He neutrons, the rate of the 9Be(n,2n)2α neutron multiple reactions, which has a threshold energy of 2.0 MeV, is significantly enhanced compared with that when a source with a Gaussian neutron emission spectrum was assumed. In addition, the influence of the blanket composition on the tritium production performance is discussed.",

author = "Tomoki Urakawa and Hideaki Matsuura and Yasuko Kawamoto and Satoshi Konishi",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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doi = "10.1016/j.fusengdes.2018.03.056",

language = "English",

volume = "136",

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journal = "Fusion Engineering and Design",

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T1 - Influence of modified neutron emission spectrum on tritium production performance in blanket systems with NBI-heated deuterium plasma

AU - Urakawa, Tomoki

AU - Matsuura, Hideaki

AU - Kawamoto, Yasuko

AU - Konishi, Satoshi

PY - 2018/11

Y1 - 2018/11

N2 - In high-temperature plasma sustained by neutral beam injection heating, the emission spectrum of the neutrons produced by fusion reactions is known to have a modified Gaussian distribution. In this study, neutron transport simulation is carried out for a plasma source that emits neutrons with a modified spectrum and the influence of this modified neutron emission spectrum on the tritium production performance is investigated. The results show that in tritium production using D(d,n)3He neutrons, the rate of the 9Be(n,2n)2α neutron multiple reactions, which has a threshold energy of 2.0 MeV, is significantly enhanced compared with that when a source with a Gaussian neutron emission spectrum was assumed. In addition, the influence of the blanket composition on the tritium production performance is discussed.

AB - In high-temperature plasma sustained by neutral beam injection heating, the emission spectrum of the neutrons produced by fusion reactions is known to have a modified Gaussian distribution. In this study, neutron transport simulation is carried out for a plasma source that emits neutrons with a modified spectrum and the influence of this modified neutron emission spectrum on the tritium production performance is investigated. The results show that in tritium production using D(d,n)3He neutrons, the rate of the 9Be(n,2n)2α neutron multiple reactions, which has a threshold energy of 2.0 MeV, is significantly enhanced compared with that when a source with a Gaussian neutron emission spectrum was assumed. In addition, the influence of the blanket composition on the tritium production performance is discussed.

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JO - Fusion Engineering and Design

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Influence of modified neutron emission spectrum on tritium production performance in blanket systems with NBI-heated deuterium plasma

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