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Takeda, Nobukazu; Kakudate, Satoshi; Nakahira, Masataka; Matsumoto, Yasuhiro; Taguchi, Ko; Kozaka, Hiroshi; Shibanuma, Kiyoshi
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Nakamura, Kazuo*; Matsufuji, Shinji*; Tomoda, Seiji*; Wang, F.*; Mitarai, Osamu*; Kurihara, Kenichi; Kawamata, Yoichi; Sueoka, Michiharu; Sato, Konosuke*; Zushi, Hideki*; et al.
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no abstracts in English
Kondoh, Takashi; Ishikawa, Masao; Nishitani, Takeo; Kusama, Yoshinori
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no abstracts in English
Kamada, Masaki; Hanada, Masaya; Ikeda, Yoshitaka
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no abstracts in English
Nozawa, Takashi; Tanigawa, Hiroyasu
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Due to the cumulative accumulation of micro cracks, fracture behavior of SiC/SiC composites is generally quasi-ductile with irreversible damages. Therefore the design basis for this class of material is quite different from that for ductile metals. Accordingly, BA activity aims to develop the design basis for SiC/SiC composites with three pragmatic phases: (1) definition of design parameter, (2) standardization of test methods, and (3) data-basing. This study aims to evaluate fracture resistance of SiC/SiC composites. Importantly, crack propagation behavior was investigated by the single-edge notched-bend technique. Test results identified failure process as: (1) micro-crack formation, (2) macro-crack extension and (3) interfacial friction and fiber breaks. Failure energy in each stage was successfully measured by hysteresis analysis, eventually giving a fracture resistance. Besides, with the fact of notch instability of composites, a stress criterion in composite failure was concluded.
Hanada, Masaya; Ikeda, Yoshitaka; Kobayashi, Kaoru; Kamada, Masaki
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Miyashita, Makoto; Ida, Mizuho; Wakai, Eiichi; Nakamura, Hiroo; Furuya, Kazuyuki*
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Kashiwagi, Mieko; Inoue, Takashi; Taniguchi, Masaki; Umeda, Naotaka; Watanabe, Kazuhiro; Kamada, Masaki; Hanada, Masaya; Ikeda, Yoshitaka; Sakamoto, Keishi
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no abstracts in English
Ida, Mizuho; Yoshida, Eiichi; Nakamura, Hiroo; Hirakawa, Yasushi; Yatabe, Toshio; Horiike, Hiroshi*; Kondo, Hiroo*; Yamaoka, Nobuo*
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no abstracts in English
Yamamoto, Masanori; Watanabe, Kazuhiro; Inoue, Takashi; Yamashita, Yasuo*
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Hoshino, Tsuyoshi; Hayashi, Kimio; Nakamura, Mutsumi*; Nemoto, Tadahiro*; Tatenuma, Katsuyoshi*
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Kondo, Hiroo*; Kanemura, Takuji*; Yamaoka, Nobuo*; Miyamoto, Seiji*; Horiike, Hiroshi*; Ida, Mizuho; Nakamura, Hiroo; Matsushita, Izuru*; Muroga, Takeo*
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Sugiura, Hirokazu*; Kondo, Hiroo*; Kanemura, Takuji*; Niwa, Yuta*; Yamaoka, Nobuo*; Miyamoto, Seiji*; Horiike, Hiroshi*; Ida, Mizuho; Nakamura, Hiroo; Matsushita, Izuru*; et al.
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Nakamura, Kazuyuki; Garin, P.*; Sugimoto, Masayoshi; Molla, J.*; M
slang, A.*; Wakai, Eiichi
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IFMIF/EVEDA Test facility activities, which consisted of design, validation and supporting tasks, started last July. In the activities, several tasks shared to Japan and EU will be performed until June in 2013. For the Japanese tasks, JAEA, universities and other organization will contribute the activities. For the EU tasks, FZK (Germany), CIEMAT (Spain), PSI (Switzerland) and SCK-CEN (Belgium) will contribute the activities. First draft design reports will be supplied at June in 2012.
Kikuchi, Takayuki; Sugimoto, Masayoshi; Nakamura, Kazuyuki; Wakai, Eiichi; Garin, P.*; Molla, J.*
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Post irradiation examination (PIE) facilities where the examination item is enforceable after it irradiates it being examined by the conceptual design are designed in detail in IFMIF/EVEDA. It reports on the examination situation in the current state this time.
Kasugai, Atsushi; Kajiwara, Ken; Takahashi, Koji; Oda, Yasuhisa; Kobayashi, Noriyuki; Sakamoto, Keishi
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Moriyama, Shinichi; Kobayashi, Takayuki; Yokokura, Kenji; Shimono, Mitsugu; Hasegawa, Koichi; Sawahata, Masayuki; Terakado, Masayuki; Igarashi, Koichi; Wada, Kenji; Fujii, Tsuneyuki
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Kobayashi, Takayuki; Moriyama, Shinichi; Yokokura, Kenji; Hasegawa, Koichi; Suzuki, Sadaaki; Hiranai, Shinichi; Sato, Fumiaki; Suzuki, Takashi; Wada, Kenji; Fujii, Tsuneyuki
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Developments of reliable transmission lines and antennas are important to high power and long pulse operations of electron cyclotron resonance heating (ECH) systems. Design study of an antenna concept, which has a reliable cooling and driving structure to alter wave injection angle in poloidal direction only by a linear motion of a mirror, is under way. For an effective current drive and an electron heating by ECH, a toroidal injection angle (
) should be optimized for each objective of the experiment. In this study, an available range of was evaluated. Due to a difference of the reflecting position on the movable mirror toward depth of a port for each 
, the available is limited for small . By a numerical calculation, it was found that 0
20 was available for = 0 by this antenna assuming the JT-60U ECH port. Therefore toroidal injection angle can be optimized for each experiment.
Kajiwara, Ken; Takahashi, Koji; Kobayashi, Noriyuki; Oda, Yasuhisa; Kasugai, Atsushi; Sakamoto, Keishi
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no abstracts in English