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Nojima, Takehiro; Yasuda, Ryo; Takenaka, Nobuyuki*; Katagiri, Masaki*; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito
Physics Procedia, 43, p.282 - 287, 2013/00
Times Cited Count：2 Percentile：69.06(Physics, Applied)We developed a new imaging system for observing the water distribution in Polymer Electrolyte Fuel Cell (PEFC) under operation. This imaging system realizes both low noise and high sensitivity imaging and it enables to obtain an image in relatively short exposure time. This imaging system consists of EM-CCD (Electron Multiplication-Charged Coupled Device) camera, a LiF/ZnS scintillator screen and slit system. The EM-CCD camera has wide dynamic range and high sensitivity. The brightness of the scintillator screen is about three times higher than that of conventional type. The slit system was used for reducing the white dot noise caused by primary and/or secondary prompt 
rays. A characteristic test of this imaging system using JARI (Japan Automobile Research Institute)-standard cell was carried out at TNRF. In the results of the test, qualitative and quantitative observation of water behavior in the channel of PEFC was archived by the new imaging system.
Nojima, Takehiro; Yasuda, Ryo; Takenaka, Nobuyuki*; Hayashida, Hirotoshi; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito
JAEA-Technology 2011-037, 33 Pages, 2012/02
JAEA-Technology-2011-037.pdf:4.12MB
We have equipped fuel cell operation system for TNRF at JRR-3 in order to visualize on performance of PEFC. Our system, which is aimed to be used in nuclear facility, is composed by various equipments that give safety in experiments such as hydrogen diluting system and purge system, etc. We confirmed normal operation of our system with JARI-standard fuel cell, and succeeded in visualizing water distribution of fuel cell on performance by our system with neutron radiography.
Murakawa, Hideki*; Hashimoto, Michinori*; Sugimoto, Katsumi*; Asano, Hitoshi*; Takenaka, Nobuyuki*; Mochiki, Koichi*; Yasuda, Ryo
Nihon Kikai Gakkai Rombunshu, B, 77(784), p.2255 - 2262, 2011/12
Yasuda, Ryo; Nitto, Koichi*; Konagai, Chikara*; Shiozawa, Masahiro*; Takenaka, Nobuyuki*; Asano, Hitoshi*; Murakawa, Hideki*; Sugimoto, Katsumi*; Nojima, Takehiro; Hayashida, Hirotoshi; et al.
Nuclear Instruments and Methods in Physics Research A, 651(1), p.268 - 272, 2011/09
Times Cited Count：7 Percentile：48.75(Instruments & Instrumentation)Neutron radiography is one of useful tools to visualize water behavior in fuel cells under operation. In order to observe the detailed information about the water distribution in MEA and GDL in fuel cells, a high spatial resolution and high sensitivity neutron imaging system are required. We developed an imaging system using the neutron color imaging intensifier and continuously observed water distribution in operating a fuel cell. By using the system, a small type fuel cell under operation was continuously observed at the TNRF in every 20 sec. In the results, the water area was appeared from GDL and MEA, and expanded to the channel of the cathode side. On the other hand, voltage was gradually reduced with the operation time, and steeply dropped. It is considered that voltage drop was caused by blockage of gas flow due to the piling up water in the channel of the cathode side.
Murakawa, Hideki*; Wada, Daisuke*; Sugimoto, Katsumi*; Asano, Hitoshi*; Takenaka, Nobuyuki*; Yasuda, Ryo
Nuclear Instruments and Methods in Physics Research A, 651(1), p.286 - 289, 2011/09
Times Cited Count：9 Percentile：56.9(Instruments & Instrumentation)Takenaka, Nobuyuki*; Asano, Hitoshi*; Sugimoto, Katsumi*; Murakawa, Hideki*; Hashimoto, Michinori*; Shindo, Noritaka*; Mochiki, Koichi*; Yasuda, Ryo
Nuclear Instruments and Methods in Physics Research A, 651(1), p.277 - 281, 2011/09
Times Cited Count：5 Percentile：38.51(Instruments & Instrumentation)Yasuda, Ryo; Shiozawa, Masahiro*; Katagiri, Masaki*; Takenaka, Nobuyuki*; Sakai, Takuro; Hayashida, Hirotoshi; Matsubayashi, Masahito
Denki Kagaku Oyobi Kogyo Butsuri Kagaku, 79(8), p.614 - 619, 2011/08
Times Cited Count：1 Percentile：2.43(Electrochemistry)Murakawa, Hideki*; Ueda, Tadanobu*; Yoshida, Takehisa*; Sugimoto, Katsumi*; Asano, Hitoshi*; Takenaka, Nobuyuki*; Mochiki, Koichi*; Iikura, Hiroshi; Yasuda, Ryo; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 605(1-2), p.127 - 130, 2009/06
Times Cited Count：24 Percentile：82.24(Instruments & Instrumentation)Takenaka, Nobuyuki*; Yasuda, Ryo; Saito, Yasushi*; Kureta, Masatoshi
Radioisotopes, 56(10), p.699 - 707, 2007/10
no abstracts in English
Kawai, Masayoshi*; Furusaka, Michihiro; Li, J.-F.*; Kawasaki, Akira*; Yamamura, Tsutomu*; Mehmood, M.*; Kurishita, Hiroaki*; Kikuchi, Kenji; Takenaka, Nobuyuki*; Kiyanagi, Yoshiaki*; et al.
Proceedings of ICANS-XVI, Volume 3, p.1087 - 1096, 2003/07
In order to establish the technique fabricating a thin target slab with a real size, thin tantalum-clad tungsten slab with a hole for a thermocouple was fabricated with the high-precision machinery techniques and the HIP'ing method. The ultrasonic diagnostic showed that tantalum and tungsten bond was perfect. The HIP optimum condition was certified by means of the small punch test as already reported. The electrolytic coating technique in a molten salt was developed to make a thinner tantalum cladding on a tungsten target with a complicated shape, in order to reduce radioactivity from tantalum in an irradiated target.
*; *; *; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 424(1), p.77 - 83, 1999/00
Times Cited Count：9 Percentile：57.16(Instruments & Instrumentation)no abstracts in English
Takenaka, Nobuyuki*; Asano, Hitoshi*; Fujii, Terushige*; Ushiro, Toshihiko*; Iwatani, Junji*; Murata, Yutaka*; Mochiki, Koichi*; Taguchi, Akira*; Matsubayashi, Masahito; Tsuruno, Akira
Nuclear Instruments and Methods in Physics Research A, 377(1), p.174 - 176, 1996/07
Times Cited Count：1 Percentile：23.5(Instruments & Instrumentation)no abstracts in English
*; *; Fujii, Terushige*; *; *; *; Matsubayashi, Masahito; Tsuruno, Akira
Fifth World Conf. on Neutron Radiography, 0, p.623 - 629, 1996/00
no abstracts in English
Nishi, Yoshihisa*; *; Furuya, Masahiro*; *; Matsubayashi, Masahito; Tsuruno, Akira
Fifth World Conf. on Neutron Radiography, 0, p.548 - 555, 1996/00
no abstracts in English
*; *; *; *; Matsubayashi, Masahito; Tsuruno, Akira
Fifth World Conf. on Neutron Radiography, 0, p.610 - 616, 1996/00
no abstracts in English
*; *; Fujii, Terushige*; *; Matsubayashi, Masahito; Tsuruno, Akira
Fifth World Conf. on Neutron Radiography, 0, p.118 - 125, 1996/00
no abstracts in English
*; *; Fujii, Terushige*; *; *; *; Matsubayashi, Masahito; Tsuruno, Akira
Nuclear Instruments and Methods in Physics Research A, 377, p.153 - 155, 1996/00
Times Cited Count：8 Percentile：58.81(Instruments & Instrumentation)no abstracts in English
*; *; *; *; Tsuruno, Akira; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 377, p.144 - 147, 1996/00
Times Cited Count：7 Percentile：55.21(Instruments & Instrumentation)no abstracts in English
*; *; Fujii, Terushige*; *; Matsubayashi, Masahito; Tsuruno, Akira
Nuclear Instruments and Methods in Physics Research A, 377, p.115 - 118, 1996/00
Times Cited Count：15 Percentile：76.16(Instruments & Instrumentation)no abstracts in English
*; *; Fujii, Terushige*; *; *; Matsubayashi, Masahito; Tsuruno, Akira
Nuclear Instruments and Methods in Physics Research A, 377, p.156 - 160, 1996/00
Times Cited Count：7 Percentile：55.21(Instruments & Instrumentation)no abstracts in English
