Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD

Tomoyo Tanaka; Sachiko Yoshihashi; Makoto Kobayashi; Akira Uritani; Kenichi Watanabe; Atsushi Yamazaki; Takeo Nishitani; Kunihiro Ogawa; Mitsutaka Isobe

doi:10.1016/j.fusengdes.2019.01.005

Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD

Tomoyo Tanaka, Sachiko Yoshihashi, Makoto Kobayashi, Akira Uritani, Kenichi Watanabe, Atsushi Yamazaki, Takeo Nishitani, Kunihiro Ogawa, Mitsutaka Isobe

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

4 Citations (Scopus)

Abstract

In the Large Helical Device (LHD) of the National Institute for Fusion Science, the experiments using deuterium plasma were performed from March 2017. Neutrons with the energy of 2.45 MeV are generated by d (d, n) ³He reactions. The evaluation of the neutron flux in the torus hall as well as the LHD vessel is very important for designing the decommissioning of the LHD in the future, and the radiation shielding for workers and components around LHD. In this study, we performed the activation experiments using multiple activation foils to obtain a neutron spectrum in the vacuum vessel of the LHD. The reaction rate of each activation foil was generally consistent with the calculation result by MCNP6. As a result of the unfolding with SAND-II code, we experimentally obtained the neutron spectrum in the vacuum vessel of the LHD for the first time.

Original language	English
Pages (from-to)	496-499
Number of pages	4
Journal	Fusion Engineering and Design
Volume	146
DOIs	https://doi.org/10.1016/j.fusengdes.2019.01.005
Publication status	Published - Sept 2019
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/j.fusengdes.2019.01.005

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title = "Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD",

abstract = "In the Large Helical Device (LHD) of the National Institute for Fusion Science, the experiments using deuterium plasma were performed from March 2017. Neutrons with the energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of the neutron flux in the torus hall as well as the LHD vessel is very important for designing the decommissioning of the LHD in the future, and the radiation shielding for workers and components around LHD. In this study, we performed the activation experiments using multiple activation foils to obtain a neutron spectrum in the vacuum vessel of the LHD. The reaction rate of each activation foil was generally consistent with the calculation result by MCNP6. As a result of the unfolding with SAND-II code, we experimentally obtained the neutron spectrum in the vacuum vessel of the LHD for the first time.",

author = "Tomoyo Tanaka and Sachiko Yoshihashi and Makoto Kobayashi and Akira Uritani and Kenichi Watanabe and Atsushi Yamazaki and Takeo Nishitani and Kunihiro Ogawa and Mitsutaka Isobe",

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doi = "10.1016/j.fusengdes.2019.01.005",

language = "English",

volume = "146",

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journal = "Fusion Engineering and Design",

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T1 - Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD

AU - Tanaka, Tomoyo

AU - Yoshihashi, Sachiko

AU - Kobayashi, Makoto

AU - Uritani, Akira

AU - Watanabe, Kenichi

AU - Yamazaki, Atsushi

AU - Nishitani, Takeo

AU - Ogawa, Kunihiro

AU - Isobe, Mitsutaka

PY - 2019/9

Y1 - 2019/9

N2 - In the Large Helical Device (LHD) of the National Institute for Fusion Science, the experiments using deuterium plasma were performed from March 2017. Neutrons with the energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of the neutron flux in the torus hall as well as the LHD vessel is very important for designing the decommissioning of the LHD in the future, and the radiation shielding for workers and components around LHD. In this study, we performed the activation experiments using multiple activation foils to obtain a neutron spectrum in the vacuum vessel of the LHD. The reaction rate of each activation foil was generally consistent with the calculation result by MCNP6. As a result of the unfolding with SAND-II code, we experimentally obtained the neutron spectrum in the vacuum vessel of the LHD for the first time.

AB - In the Large Helical Device (LHD) of the National Institute for Fusion Science, the experiments using deuterium plasma were performed from March 2017. Neutrons with the energy of 2.45 MeV are generated by d (d, n) 3He reactions. The evaluation of the neutron flux in the torus hall as well as the LHD vessel is very important for designing the decommissioning of the LHD in the future, and the radiation shielding for workers and components around LHD. In this study, we performed the activation experiments using multiple activation foils to obtain a neutron spectrum in the vacuum vessel of the LHD. The reaction rate of each activation foil was generally consistent with the calculation result by MCNP6. As a result of the unfolding with SAND-II code, we experimentally obtained the neutron spectrum in the vacuum vessel of the LHD for the first time.

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VL - 146

SP - 496

EP - 499

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Measurement of neutron spectrum using activation method in deuterium plasma experiment at LHD

Abstract

All Science Journal Classification (ASJC) codes

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