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Yonomoto, Taisuke; Shibamoto, Yasuteru; Satou, Akira; Okagaki, Yuria
Journal of Nuclear Science and Technology, 53(9), p.1342 - 1352, 2016/09
Times Cited Count：3 Percentile：26.09(Nuclear Science & Technology)Our previous study investigated the rewetting behavior of dryout fuel surface during transients beyond anticipated operational occurrences (AOOs) for BWRs, which indicated the rewetting velocity was significantly affected by the precursory cooling defined as cooling immediately before rewetting. The present study further investigated the previous experiments by conducting additional experimental and numerical heat conduction analyses to characterize the precursory cooling. For the characterization, the precursory cooling was firstly defined quantitatively based on evaluated heat transfer rates; the rewetting velocity was investigated as a function of the cladding temperature immediately before the onset of the precursory cooling. The results indicated that the propagation velocity appeared to be limited by the maximum heat transfer rate near the rewetting front. This limitation was consistent with results of the heat conduction analysis.
Chen, J.; Asano, Masaharu; Yamaki, Tetsuya; Yoshida, Masaru
Journal of Membrane Science, 269(1-2), p.194 - 204, 2006/02
Times Cited Count：141 Percentile：95.85(Engineering, Chemical)To develop a highly chemically stable polymer electrolyte membrane for application in a direct methanol fuel cell (DMFC), four styrene derivative monomers, m,p-methylstyrene (MeSt), p-tert-butylstyrene (tBuSt), divinylbenzene (DVB) and bis(p,p-vinyl phenyl) ethane (BVPE) were graft copolymerized into poly(ethylene-co-tetrafluoroethylene) (ETFE) films followed by sulfonation and hydrolysis. The latter two monomers were used as crosslinkers. The graft copolymerization was carried out by the 
-ray preirradiation method. The influence of the preirradiation dose and the grafting kinetics were investigated in detail. Sulfonation of the grafted ETFE films was performed in a chlorosulfonic acid solution, by which the sulfonation ratio reached about 90%. The newly obtained membrane possesses significantly higher chemical stability than the traditional styrene/DVB-grafted membrane and six times lower methanol permeability compared to the Nafion 112 membrane. Therefore, this study reveals the possibility of the developed inexpensive four monomers-grafted membranes, which could provide an attractive alternative as a substitute for the expensive Nafion membranes for DMFC applications.
Sasa, Toshinobu; Oigawa, Hiroyuki; Tsujimoto, Kazufumi; Nishihara, Kenji; Kikuchi, Kenji; Kurata, Yuji; Saito, Shigeru; Futakawa, Masatoshi; Umeno, Makoto*; Ouchi, Nobuo; et al.
Nuclear Engineering and Design, 230(1-3), p.209 - 222, 2004/05
Times Cited Count：37 Percentile：89.13(Nuclear Science & Technology)JAERI carries out research and development on accelerator-driven system (ADS) to transmute minor actinides and long-lived fission products. The system is composed of high intensity proton accelerator, lead-bismuth spallation target and lead-bismuth cooled subcritical core with nitride fuel. About 2,500 kg of minor actinide is loaded into the subcritical core. Annual transmutation amount using this system is 250 kg with 800MW of thermal output. A superconducting linear accelerator with the beam power of 30MW is connected to drive the subcritical core. Many research and development activities are under way and planned in the fields of subcritical core design, spallation target technology, lead-bismuth handling technology, accelerator development, and minor actinide fuel development. Especially, to study and evaluate the feasibility of the ADS from physics and engineering aspects, the Transmutation Experimental Facility (TEF) is proposed under a framework of the High-Intensity Proton Accelerator Project.
Maruyama, Yu; Sugimoto, Jun
Journal of Nuclear Science and Technology, 36(10), p.914 - 922, 1999/10
Times Cited Count：3 Percentile：28.69(Nuclear Science & Technology)no abstracts in English
Cs following the decay of Xe atoms implanted in metals; ; ; ; ; ; Muto, Suguru*; Koizumi, Mitsuo; Osa, Akihiko; Sekine, Toshiaki; et al.
Journal of Radioanalytical and Nuclear Chemistry, 239(2), p.251 - 255, 1999/00
Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)no abstracts in English
JAERI-Data/Code 98-009, 136 Pages, 1998/03
JAERI-Data-Code-98-009.pdf:5.04MB
no abstracts in English
Toda, Naohiro*; Katayama, Yoshinori; Tsuji, Kazuhiko*
Review of High Pressure Science and Technology, 7, p.647 - 649, 1998/03
The electrical conductivity 
has been measured at pressures 
to 8 GPa and temperatures 
of 77-300K in evaporated amorphous Ge (a-Ge), a-Ge-Cu alloys and a-Ge-Al alloys. The dependence of is well described by a power lw at low temperatures below 150 K, which is expemcted from a multi-phonon tunneling transition process model with weak electron-lattice coupling, rather than the Mott's variable range hopping conduction model. The exponent 
in the power law changes with increasing pressure. For both a-Ge
Cu
and a-GeAl alloys, d(ln )/d show positive values in the low pressure region and negative values in the high pressure region. Results are discussed from several hopping conduction models.
Proc. of 1998 IEEE Int. Conf. on Control Applications (CD-ROM), p.1323 - 1327, 1998/00
no abstracts in English
Takada, Shoji; Suzuki, Kunihiro; Inagaki, Yoshiyuki; Sudo, Yukio
Heat Transfer-Jpn. Res., 26(3), p.159 - 175, 1997/00
no abstracts in English
Kuriyama, Kazuo*; Kazama, K.*; Kato, Takashi*; Yamamoto, Shunya; Aoki, Yasushi; Naramoto, Hiroshi
Journal of Applied Physics, 80(8), p.4488 - 4490, 1996/10
Times Cited Count：1 Percentile：8.21(Physics, Applied)no abstracts in English
Onozuka, Masanori*; Tsujimura, Seiji*; Toyoda, Masahiko*; Inoue, Masahiko*; Abe, Tetsuya; Murakami, Yoshio
Fusion Technology, 29(1), p.73 - 82, 1996/01
Times Cited Count：9 Percentile：61.52(Nuclear Science & Technology)no abstracts in English
; Kunugi, Tomoaki
Therm. Sci. Eng., 4(3), p.1 - 7, 1996/00
no abstracts in English
; Kunugi, Tomoaki
Computational Fluid Dynamics Journal, 4(3), p.265 - 277, 1995/10
no abstracts in English
Onozuka, Masanori*; Tsujimura, Seiichi*; Toyoda, Masahiko*; Inoue, Masahiko*; Abe, Tetsuya; Murakami, Yoshio
Fusion Technology 1994, Vol.1, p.803 - 806, 1995/00
no abstracts in English
Suzuki, Mitsuhiro
JAERI-Tech 94-029, 43 Pages, 1994/11
no abstracts in English
Watanabe, Tadashi; ; Yokokawa, Mitsuo
Physical Review E, 49(5), p.4060 - 4064, 1994/05
Times Cited Count：39 Percentile：81.02(Physics, Fluids & Plasmas)no abstracts in English
Harayama, Yasuo; Hoshiya, Taiji; ; Niimi, Motoji; Kobayashi, Toshiki*
Journal of Nuclear Science and Technology, 30(4), p.291 - 301, 1993/04
Times Cited Count：4 Percentile：44.62(Nuclear Science & Technology)no abstracts in English
; Akiba, Masato; Araki, Masanori; Dairaku, Masayuki; Ise, Hideo*;
JAERI-M 91-085, 20 Pages, 1991/05
no abstracts in English
Araya, Fumimasa;
JAERI-M 91-071, 53 Pages, 1991/05
no abstracts in English
M.Z.Hasan*; Kunugi, Tomoaki; Seki, Masahiro; Yokokawa, Mitsuo; Ise, Hideo*; ;
Fusion Technology, 19, p.908 - 912, 1991/05
no abstracts in English
