Kinetics of deuterium penetration into neutron-irradiated tungsten under exposure to high flux deuterium plasma

M. Yajima; Y. Hatano; N. Ohno; T. Kuwabara; T. Toyama; M. Takagi; K. Suzuki

doi:10.1016/j.nme.2019.100699

Kinetics of deuterium penetration into neutron-irradiated tungsten under exposure to high flux deuterium plasma

M. Yajima, Y. Hatano, N. Ohno, T. Kuwabara, T. Toyama, M. Takagi, K. Suzuki

International Research Center for Nuclear Materials Science

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

1 Citation (Scopus)

Abstract

The objective of this study is to investigate the effects of neutron (n) irradiation on hydrogen isotope transport in tungsten (W). W samples were irradiated with neutrons in a fission reactor and then exposed to high flux deuterium (D) plasma at 563 K in a linear plasma device. The fraction of D release increased with increasing exposure time. In addition, the D retention in n-irradiated W increased in proportion to the square root of the plasma exposure time. These observations were explained by increase in the penetration depth of D with filling up displacement damages acting as strong trapping sites.

Original language	English
Article number	100699
Journal	Nuclear Materials and Energy
Volume	21
DOIs	https://doi.org/10.1016/j.nme.2019.100699
Publication status	Published - 2019 Dec

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science (miscellaneous)
Nuclear Energy and Engineering

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title = "Kinetics of deuterium penetration into neutron-irradiated tungsten under exposure to high flux deuterium plasma",

abstract = "The objective of this study is to investigate the effects of neutron (n) irradiation on hydrogen isotope transport in tungsten (W). W samples were irradiated with neutrons in a fission reactor and then exposed to high flux deuterium (D) plasma at 563 K in a linear plasma device. The fraction of D release increased with increasing exposure time. In addition, the D retention in n-irradiated W increased in proportion to the square root of the plasma exposure time. These observations were explained by increase in the penetration depth of D with filling up displacement damages acting as strong trapping sites.",

author = "M. Yajima and Y. Hatano and N. Ohno and T. Kuwabara and T. Toyama and M. Takagi and K. Suzuki",

note = "Funding Information: The authors would like to express their sincere thanks to Profs. T. Muroga and S. Masuzaki in NIFS and Prof. Y. Nagai in Tohoku University for their support and encouragement. This work was supported by JSPS KAKENHI Grant Number JP18H03688 and JP15K18309 , the National Institute for Fusion Science Collaboration Research Program ( NIFS13KOBF026 and NIFS17KNWF003 ), National Institutes of Natural Sciences Research Program ( UFEX101 ), and the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University (Proposal No. 16M0023). ",

year = "2019",

month = dec,

doi = "10.1016/j.nme.2019.100699",

language = "English",

volume = "21",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Limited",

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T1 - Kinetics of deuterium penetration into neutron-irradiated tungsten under exposure to high flux deuterium plasma

AU - Yajima, M.

AU - Hatano, Y.

AU - Ohno, N.

AU - Kuwabara, T.

AU - Toyama, T.

AU - Takagi, M.

AU - Suzuki, K.

N1 - Funding Information: The authors would like to express their sincere thanks to Profs. T. Muroga and S. Masuzaki in NIFS and Prof. Y. Nagai in Tohoku University for their support and encouragement. This work was supported by JSPS KAKENHI Grant Number JP18H03688 and JP15K18309 , the National Institute for Fusion Science Collaboration Research Program ( NIFS13KOBF026 and NIFS17KNWF003 ), National Institutes of Natural Sciences Research Program ( UFEX101 ), and the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University (Proposal No. 16M0023).

PY - 2019/12

Y1 - 2019/12

N2 - The objective of this study is to investigate the effects of neutron (n) irradiation on hydrogen isotope transport in tungsten (W). W samples were irradiated with neutrons in a fission reactor and then exposed to high flux deuterium (D) plasma at 563 K in a linear plasma device. The fraction of D release increased with increasing exposure time. In addition, the D retention in n-irradiated W increased in proportion to the square root of the plasma exposure time. These observations were explained by increase in the penetration depth of D with filling up displacement damages acting as strong trapping sites.

AB - The objective of this study is to investigate the effects of neutron (n) irradiation on hydrogen isotope transport in tungsten (W). W samples were irradiated with neutrons in a fission reactor and then exposed to high flux deuterium (D) plasma at 563 K in a linear plasma device. The fraction of D release increased with increasing exposure time. In addition, the D retention in n-irradiated W increased in proportion to the square root of the plasma exposure time. These observations were explained by increase in the penetration depth of D with filling up displacement damages acting as strong trapping sites.

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