Deuterium retention in W and W-Re alloy irradiated with high energy Fe and W ions: Effects of irradiation temperature

Y. Hatano; K. Ami; V.Kh. Alimov; S. Kondo; T. Hinoki; T. Toyama; M. Fukuda; A. Hasegawa; K. Sugiyama; Y. Oya; M. Oyaidzu; T. Hayashi

doi:10.1016/j.nme.2016.06.016

Nuclear Materials and Energy (Dec 2016)

Deuterium retention in W and W-Re alloy irradiated with high energy Fe and W ions: Effects of irradiation temperature

Y. Hatano,
K. Ami,
V.Kh. Alimov,
S. Kondo,
T. Hinoki,
T. Toyama,
M. Fukuda,
A. Hasegawa,
K. Sugiyama,
Y. Oya,
M. Oyaidzu,
T. Hayashi

Affiliations

Y. Hatano: Hydrogen Isotope Research Center, Organization for Promotion of Research, University of Toyama, Toyama 930-8555, Japan
K. Ami: Hydrogen Isotope Research Center, Organization for Promotion of Research, University of Toyama, Toyama 930-8555, Japan
V.Kh. Alimov: Hydrogen Isotope Research Center, Organization for Promotion of Research, University of Toyama, Toyama 930-8555, Japan
S. Kondo: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
T. Hinoki: Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
T. Toyama: Intitute for Materials Research, Tohoku University, Oarai 311-1313, Japan
M. Fukuda: School of Engineering, Tohoku University, Sendai 980-8579, Japan
A. Hasegawa: School of Engineering, Tohoku University, Sendai 980-8579, Japan
K. Sugiyama: Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany
Y. Oya: College of Science, Academic Institute, Shizuoka University, Shizuoka 422-8529, Japan
M. Oyaidzu: Sector of Fusion Research and Development, Japan Atomic Energy Agency, Rokkasho 039-3212, Japan
T. Hayashi: Sector of Fusion Research and Development, Japan Atomic Energy Agency, Rokkasho 039-3212, Japan

DOI: https://doi.org/10.1016/j.nme.2016.06.016
Journal volume & issue: Vol. 9, no. C
pp. 93 – 97

Abstract

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Neutron irradiation to W induces defects acting as traps against hydrogen isotopes and transmutation elements such as Re and Os. To investigate synergetic effects on radiation-induced defects and Re, deuterium (D) retention in W and W–5% Re samples were examined after irradiation with 6.4MeV Fe ions at 523–1273K followed by exposure to D2 gas at 673K. The value of D retention in W–5% Re was lower than that in W by orders of magnitude after the irradiation at high temperatures (≥1073K), while no significant effects of Re addition was observed after irradiation at 523K. Irradiation with 20MeV W ions at room temperature followed by exposure to D plasma at 443–743K also resulted in small difference in D retention between W and W–5% Re samples. The results of positron lifetime measurements showed that the reduced D retention by Re observed after high temperature irradiation was due to suppression of formation of vacancy-type defects (monovacancies and vacancy clusters) by Re.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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