Tritium retention characteristics in dust particles in JET with ITER-like wall

T. Otsuka; S. Masuzaki; N. Ashikawa; Y. Hatano; Y. Asakura; Tatsuya Suzuki; Takumi Suzuki; K. Isobe; T. Hayashi; M. Tokitani; Y. Oya; D. Hamaguchi; H. Kurotaki; R. Sakamoto; Hiroyasu Tanigawa; M. Nakamichi; A. Widdowson; M. Rubel

Nuclear Materials and Energy (Dec 2018)

Tritium retention characteristics in dust particles in JET with ITER-like wall

T. Otsuka,
S. Masuzaki,
N. Ashikawa,
Y. Hatano,
Y. Asakura,
Tatsuya Suzuki,
Takumi Suzuki,
K. Isobe,
T. Hayashi,
M. Tokitani,
Y. Oya,
D. Hamaguchi,
H. Kurotaki,
R. Sakamoto,
Hiroyasu Tanigawa,
M. Nakamichi,
A. Widdowson,
M. Rubel

Affiliations

T. Otsuka: Kindai University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan; Corresponding author.
S. Masuzaki: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
N. Ashikawa: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
Y. Hatano: University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
Y. Asakura: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
Tatsuya Suzuki: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
Takumi Suzuki: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
K. Isobe: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
T. Hayashi: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
M. Tokitani: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
Y. Oya: Shizuoka University, Shizuoka, 422-8529, Japan
D. Hamaguchi: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
H. Kurotaki: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
R. Sakamoto: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
Hiroyasu Tanigawa: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
M. Nakamichi: National Institutes for Quantum and Radiological Science and Technology, Rokkasho Aomori 039-3212, Japan
A. Widdowson: Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, OX 14 3DB, UK
M. Rubel: Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden

Journal volume & issue: Vol. 17
pp. 279 – 283

Abstract

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A tritium imaging plate technique (TIPT) in combination with an electron-probe microscopic analysis (EPMA) were applied to examine tritium (T) retention characteristics in individual dust particles collected in the Joint European Torus with the ITER-like Wall (JET-ILW) after the first campaign in 2011–2012.A lot of carbon (C)-dominated dust particles were found, which would be pre-existing carbon deposits in the JET-C or released carbon particles from the remaining carbon-fiber components in the JET-ILW. Most of T was retained at the surface of and/or in the C-dominated dust particles. The retention in tungsten, beryllium and other metal-dominated dust particles is relatively lower by a factor of 10–100 in comparison with that in the C-dominated particles. Keywords: JET-ILW, Dust, Tritium, Imaging plate, Electron prove microscopic analysis

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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