Tritium retention characteristics in dust particles in JET with ITER-like wall. (December 2018)

• Record Type: Journal Article
• Authors: Otsuka, T.; Masuzaki, S.; Ashikawa, N.; Hatano, Y.; Asakura, Y.; Suzuki, Tatsuya; Suzuki, Takumi; Isobe, K.; Hayashi, T.; Tokitani, M.; Oya, Y.; Hamaguchi, D.; Kurotaki, H.; Sakamoto, R.; Tanigawa, Hiroyasu; Nakamichi, M.; Widdowson, A.; Rubel, M.
• Is Part Of: Nuclear materials and energy. Volume 17(2018)
• Page Start: 279
• Page End: 283
• Publication Date: 2018-12
• Subjects: JET-ILW -- Dust -- Tritium -- Imaging plate -- Electron prove microscopic analysis; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2018.11.001
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: Tritium retention characteristics in individual dust particles collected in the Joint European Torus with the ITER-like Wall after the first campaign in 2011–2012 were successfully examined. The retention in tungsten, beryllium and other metal-dominated dust particles is lower by a factor of 10–100 than that in the C-dominated particles. Most of T was retained at the surface of and/or in the C-dominated dust particles. Abstract: 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.