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Sugo, Yumi; Sasaki, Ichiro; Watanabe, Shigeki; Ohshima, Yasuhiro; Ishioka, Noriko
no journal, ,
no abstracts in English
Shimada, Akihiko; Sugimoto, Masaki; Miyashita, Atsumi; Yoshikawa, Masahito
no journal, ,
Recovery from the accident at Tokyo Electric Power Company Fukushima Dai-ichi Nuclear Power Plant (NPP) is a matter of great urgency. In order to realize safe and secure operation for decontamination and decommissioning of NPP, it is indispensable to use equipments with sufficient radiation resistance (RR). In JAEA as well as other agency, various studies on RR of various materials and equipments have been conducted and a number of reports and papers have been published. Then, we started construction of a database named as "Database of Radiation Resistance on Polymer Materials and Equipments" and announced this database in a press release on June 1, 2012. At present, the database includes 878 data of materials, which are consisted of 423 data of polymer materials, 223 data of equipments and parts, 103 data of oils, fats and paintcoatings and 129 data of organic composite materials. The database will be extended and expected to be utilized for safe and secure operation.
Yamaki, Tetsuya; Sekine, Toshihiko*; Sawada, Shinichi; Koshikawa, Hiroshi; Asano, Masaharu; Maekawa, Yasunari; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
Our presentation deals with the application of high-energy heavy ion beams from the cyclotron accelerator to the preparation of so-called "nano-structure controlled" electrolyte membranes. The membrane preparation involves (1) irradiation of commercially-available base polymer films with 56 MeV 
N, 150 MeV 
Ar, or 450 MeV 
Xe ions, (2) graft polymerization of styrene into electronically-excited parts along the ion trajectory, called latent tracks, and (3) sulfonation of the graft polymers. The irradiating-ion dependence of membrane proton conductivities were reasonably discussed by considering the local density of the sulfonic-acid groups in the transport pathways.
Nuryanthi, N.*; Yamaki, Tetsuya; Koshikawa, Hiroshi; Asano, Masaharu; Sawada, Shinichi; Hasegawa, Shin; Kitamura, Akane; Maekawa, Yasunari; Katsumura, Yosuke*
no journal, ,
We prepared ion-track membranes of poly(vinylidene fluoride) by chemical etching in a conductometric cell and then investigated how the applied AC voltage affected etching characteristics using scanning electron microscopy. The high voltage application had some effect on the final pore diameter, which seems inconsistent with the findings of our previous conductometric analysis, while shortening the breakthrough time greatly.
Kato, Sho; Yamaki, Tetsuya; Yamamoto, Shunya; Hakoda, Teruyuki; Kawaguchi, Kazuhiro*; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
Platinum nanoparticle catalysts for fuel cell applications were prepared by ion implantation in a glassy carbon substrate followed by electrochemical etching and thermal treatment. Interestingly, they had a strong interaction with the substrate via platinum-carbon bonds, probably thereby achieving high catalytic activity for the oxygen reduction reaction.
Hiroki, Akihiro; Yamashita, Shinichi*; Kimura, Atsushi; Nagasawa, Naotsugu; Taguchi, Mitsumasa
no journal, ,
no abstracts in English
Kitamura, Akane; Yamaki, Tetsuya; Yuri, Yosuke; Sawada, Shinichi; Yuyama, Takahiro
no journal, ,
no abstracts in English