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(FT/P1-09) Development of Advanced Blanket Materials for Solid Breeder Blanket of Fusion Reactor

E. Ishitsuka¹⁾, H. Kawamura¹⁾, K. Tsuchiya¹⁾, M. Nakamichi¹⁾, M. Uchida¹⁾, H. Yamada¹⁾, K. Nakamura²⁾, H. Ito¹⁾, T. Nakazawa³⁾, H. Takahashi⁴⁾, S. Tanaka⁵⁾, N. Yoshida⁶⁾, S. Kato⁷⁾, Y. Ito^8)
 
1) Oarai Research Establishment, Japan Atomic Energy Research Institute, Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken, Japan
²⁾ Naka Fusion Research Establishment, Japan Atomic Energy Research Institute,Naka-machi, Naka-gun, Ibaraki-ken, Japan
³⁾ Tokai Research Establishment, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
⁴⁾ Center for Advanced Research of Energy Technology, Hokkaido University, Kita-ku, Sapporo-shi, Hokkaido, Japan
⁵⁾ Department of Quantum Engineering and systems Science, University of Tokyo, Hongou, Bunkyo-ku, Tokyo, Japan
⁶⁾ Research Institute for Applied Mechanics, Kyushu University, Kasugakoen, Kasuga-shi, Fukuoka-ken, Japan
⁷⁾ Advanced Reactor Fuel Division, Nuclear Fuel Industries, Ltd., Tokai-mura, Naka-gun, Ibaraki-ken, Japan
⁸⁾ Engineering Department, New Metal Division, NGK INSULATORS, LTD., Maegata, Handa-shi, Aichi-ken, Japan

Abstract.  Advanced solid breeding blanket design in the DEMO reactor requires the tritium breeder and neutron multiplier that can withstand the high temperature and high dose of neutron irradiation. Therefore, the development of such advanced blanket materials is indispensable. In this paper, the cooperation activities among JAERI, universities and industries in Japan on the development of these advanced materials are reported. Advanced tritium breeding material to prevent the grain growth in high temperature had to be developed because the tritium release behavior degraded by the grain growth. As one of such materials, TiO₂-doped Li₂TiO₃ has been studied, and TiO₂-doped Li₂TiO₃ pebbles was successfully fabricated. For the advanced neutron multiplier, the beryllium intermetallic compounds that have high melting point and good chemical stability have been studied. Some characterization of Be₁₂Ti was studied. The pebble fabrication study for Be₁₂Ti was also performed and Be₁₂Ti pebbles were successfully fabricated. From these activities, the bright prospect to realize the DEMO blanket by the application of TiO₂-doped Li₂TiO₃ and beryllium intermetallic compounds was obtained.

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