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Matsushita, Hatsuki*; Kobayashi, Ren*; Sakai, Takaaki*; Kato, Shinya; Matsuba, Kenichi; Kamiyama, Kenji
Proceedings of 13th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS-13) (Internet), 9 Pages, 2022/09
During core disruptive accidents in sodium-cooled fast reactors, the molten core material flows through flow channels, such as the control rod guide tubes, into the core inlet plenum under the core region. The molten core material can be cooled and solidified while impinging on a horizontal plate of the inlet plenum in a sodium coolant. However, the solidification and cooling behaviors of molten core materials impinged on a horizontal structure have not been sufficiently studied thus far. Notably, this is an important phenomenon that needs to be elucidated from the perspective of improving the safety of sodium-cooled fast reactors. Accordingly, a series of experiments on discharging a simulated molten core material (alumina: Al
O
) into a sodium coolant on a horizontal structure was conducted at the experimental facility of the National Nuclear Center of the Republic of Kazakhstan. In this study, analyses on the sodium experiments using SIMMER-III as the fast reactor safety evaluation code were performed. The analysis methods were validated by comparing the results and experiment data. In addition, the cooling and solidification behaviors during jet impingement were evaluated. The results indicated that the molten core material exhibited fragmentation owing to the impingement on the horizontal plate and was, therefore, scattered toward the periphery. Furthermore, the simulated molten core material was evaluated to be cooled by sodium and subsequently solidified.
AsIkeda, Shugo*; Tsuchiya, Yu*; Zhang, X.-W.*; Kishimoto, Shunji*; Kikegawa, Takumi*; Yoda, Yoshitaka*; Nakamura, Hiroki; Machida, Masahiko; Glasbrenner, J.*; Kobayashi, Hisao*
Physical Review B, 98(10), p.100502_1 - 100502_6, 2018/09
Times Cited Count：6 Percentile：30.02(Materials Science, Multidisciplinary)The interplay between magnetism and superconductivity is one of important subjects to investigate the pairing mechanism in novel superconductors. We have found new coexistence between an antiferromagnetic order in the Fe sublattice and superconductivity of the FeAs-based EuFeAs superconductor in the pressure range from 2.4 to 3.0 GPa by 
Fe nuclear forward scattering (NFS) using a single crystal sample. The magnetic state in the Fe sublattice changes to a new antiferromagnetic one with superconductivity from a stripe-type antiferromagnetic one observed in normal conducting state at 2.7 GPa. Below the superconducting transition temperature, the temperature dependence of Fe NFS spectra reveals that the new antiferromagnetic order develops with the superconductivity. This non-trivial coupling of two ordered states in EuFeAs under pressure demonstrates a new and intriguing relationship between magnetism and superconductivity in Fe-based superconductors.
subnanoclusters and Pt single atoms over porous carbon supports and their structural analyses with X-ray absorption spectroscopyItoi, Hiroyuki*; Nishihara, Hirotomo*; Kobayashi, Shunsuke*; Ittisanronnachai, S.*; Ishii, Takafumi*; Berenguer, R.*; Ito, Masashi*; Matsumura, Daiju; Kyotani, Takashi*
Journal of Physical Chemistry C, 121(14), p.7892 - 7902, 2017/04
Times Cited Count：31 Percentile：71.39(Chemistry, Physical)
cyst formation from the implanted larval integument in the sweet potato hornworm, 
; A Simple model for studying wound healingFukamoto, Kana; Shirai, Koji*; Sato, Shigeru*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko
Journal of Insect Biotechnology and Sericology, 75(3), p.99 - 106, 2006/10
no abstracts in English
Fukamoto, Kana; Shimura, Sachiko*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Sakashita, Tetsuya; Funayama, Tomoo; Kobayashi, Yasuhiko
Journal of Insect Biotechnology and Sericology, 75(3), p.107 - 114, 2006/10
no abstracts in English
C
) irradiated hematopoietic organs in the silkworm, , through the way of phagocytosis of injured cells after invasionLing, E.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Funayama, Tomoo; Watanabe, Hiroshi*
Developmental and Comparative Immunology, 30(6), p.531 - 543, 2006/00
Times Cited Count：13 Percentile：54.26(Fisheries)no abstracts in English
, after locally targeted irradiation with heavy ion beamsLing, E.*; Fukamoto, Kana*; Xu, S.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Tu, Z.; Funayama, Tomoo; Watanabe, Hiroshi; Kiguchi, Kenji*
Journal of Insect Biotechnology and Sericology, 72(2), p.95 - 100, 2003/09
no abstracts in English
?Ling, E.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Tu, Z.; Funayama, Tomoo; Watanabe, Hiroshi; Kiguchi, Kenji*
Journal of Insect Biotechnology and Sericology, 72(2), p.101 - 109, 2003/09
no abstracts in English
Akabori, Mitsuo; Kobayashi, Fumiaki; Hayashi, Hirokazu; Ogawa, Toru; Huntelaar, M. E.*; Booij, A. S.*; Vlaanderen, P. van*
Journal of Chemical Thermodynamics, 34(9), p.1461 - 1466, 2002/09
Times Cited Count：0 Percentile：0.02(Thermodynamics)no abstracts in English
, by localized irradiation of heavy ion microbeamsKiguchi, Kenji*; Kinjo, Y.*; Masahashi, K.*; Tu, Z.; Tamura, Hajime*; Shirai, K.*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi
JAERI-Review 2000-024, TIARA Annual Report 1999, p.51 - 53, 2000/10
no abstracts in English
Tu, Z. L.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi
Nihon Sanshigaku Zasshi, 68(6), p.491 - 500, 1999/00
no abstracts in English
Tu, Z. L.*; Yamasaki, Shuhei*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi
Nihon Sanshigaku Zasshi, 68(6), p.443 - 453, 1999/00
no abstracts in English
Matsushita, Hatsuki*; Kobayashi, Ren*; Sakai, Takaaki*; Kato, Shinya; Matsuba, Kenichi; Kamiyama, Kenji
no journal, ,
no abstracts in English
Asano, Towa*; Kobayashi, Toru; Shimojo, Kojiro; Yamaoka, Seiha*; Torii, Ren*; Okano, Kentaro*; Yaita, Tsuyoshi; Mori, Atsunori*
no journal, ,
no abstracts in English
