Researcher Database

Shingo TANAKA
Faculty of Engineering Energy and Environmental Systems Nuclear and Environmental Systems
Assistant Professor

Researcher Profile and Settings

Affiliation

  • Faculty of Engineering Energy and Environmental Systems Nuclear and Environmental Systems

Job Title

    Assistant Professor

URL

Research funding number

  • 90749037

Research Interests

  • Radioactive waste disposal   Bentonite   Electrokinetic phenomena   Diffusion   Sorption   Sedimentary rock   In-situ tracer migration   

Research Areas

  • Integrated engineering / Nuclear engineering

Academic & Professional Experience

  • 2014/10 - Today    Hokkaido UniversityFaculty of Engineering, Division of Energy and Environmental systemsAssistant Professor
  • 2013/09 - 2014/09    Ministry of Economy, Trade and IndustryAgency for Natural Resources and Energy
  • 2011/04 - 2013/08    Japan Atomic Energy AgencyHoronobe Underground Research CenterResearcher

Education

  •        - 2011/03  Hokkaido University  Graduate school of engineering  Energy and environmental systems

Association Memberships

  • ATOMIC ENERGY SOCIETY OF JAPAN   

Research Activities

Published Papers

  • Dipole tracer migration and diffusion tests in fractured sedimentary rock at Horonobe URL
    Tanaka, S., Yokota, H., Ohno, H., Nakayama, M., Fujita, T., Takiya, H., Watanabe, N., Kozaki, T.
    Proceedings of 23th International Conference on Nuclear Engineering (ICONE23) ICONE23-1860  2015/05 [Refereed][Not invited]
     Research paper (international conference proceedings)
  • Preliminary analysis of dipole tracer migration experiments in fractured sedimentary rock at Horonobe URL of Japan
    Yokota, H. and Tanaka, S.
    Proceedings of the 19th Pacific Basin Nuclear Conference (PBNC 2014) PBNC2014-385  2014/08 [Refereed][Not invited]
     Research paper (international conference proceedings)
  • Sato, H., Niizato, T., Amano, K., Tanaka, S., Aoki, K.
    Scientific basis for nuclear waste management XXXVI 277 - 282 2013 [Refereed][Not invited]
     Research paper (scientific journal)
  • Tanaka, S., Noda, N., Sato, S., Kozaki, T., Sato, H., Hatanaka, K.
    Journal of Nuclear Science and Technology 48 (3) 454 - 462 0022-3131 2011/03 [Refereed][Not invited]
     Research paper (scientific journal)
  • Tanaka Shingo, Noda Natsuko, Higashihara Tomohiro, Sato Seichi, Kozaki Tamotsu, Sato Haruo, Hatanaka Koichiro
    PHYSICS AND CHEMISTRY OF THE EARTH 33 S163 - S168 1474-7065 2008 [Refereed][Not invited]
  • Shingo Tanaka
    Applied Clay Science 161 482 - 493 01691317 2018/09 [Refereed][Not invited]
     
    © 2018 The Author An understanding of chemical reactions in bentonite is important in completing a reliable safety assessment of the geological disposal of radioactive waste. In the present study, porewater chemistry and calcium reactivity in a compacted Na/Ca-mixed montmorillonite is explored through a gypsum precipitation reaction enhanced using an electrokinetic method. Results showed that CaSO 4 was sparsely precipitated as gypsum in up to 300-μm aggregates, and grew into the montmorillonite texture. A threshold ionic equivalent fraction of calcium, X Ca , of the Na/Ca-mixed montmorillonite in the gypsum precipitation was experimentally found to be within a range between X Ca = 0.1 and X Ca = 0.25 under a dry density of 1.0 kg/dm 3 saturated with 0.5 M Na 2 SO 4 solution. The saturation indices of gypsum for specimens following the precipitation experiments were evaluated based on a model including anion exclusion and cation exchange (Gains-Thomas selectivity coefficients, K GT ) between the montmorillonite and interparticle solution using the PHREEQC code. Gypsum precipitation regions obtained from the precipitation experiments are in good agreement with regions in which the saturation indices are greater than zero when assuming K GT = 200, which is much greater than the K GT = 4.9 reported from the batch experiment. The greater K GT value implied in this study indicates that the thermodynamic properties of confined solutions are different from those of diluted or bulk solutions. The reason for the K GT deviation remains unresolved; however, the precipitation tendency of gypsum may be explained by a model including anion exclusion and cation exchange between the montmorillonite and the interparticle solution when an adequate K GT value is used in the calculation.
  • T. Yoshida, Y. Tasaka, S. Tanaka, H. J. Park, Y. Murai
    Applied Clay Science 161 513 - 523 01691317 2018/09 [Refereed][Not invited]
     
    © 2018 Rheological changes of gelled montmorillonite dispersions with different NaCl concentrations and alkali conditions were evaluated by ultrasonic spinning rheometry. It uses velocity-profile information that is obtained in an open-cylindrical container under periodic oscillations. The measurement was conducted with a focus on the rheological behavior at a low shear rate O(1 s −1 ), which is difficult to measure because of shear banding. The rheometry represents the coexistence of gel and sol conditions in dispersions as profiles of the phase lag of oscillations that are propagated from the cylinder wall. The critical shear rate at a yielding point and the onset of shear-thinning behavior was quantified, which has been regarded as only an apparent or speculated value by many previous researchers. Viscoelasticity from particle networks in the dispersion was observed, and the networks deform like a spring, without breaking the structure under low-shear-rate conditions.
  • Shingo Tanaka
    SCIENCE TRENDS (online) 2018/09 [Not refereed][Invited]
     Research paper (other science council materials etc.)

MISC

Educational Activities

Teaching Experience

  • EES Advanced Laboratory Seminar
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : 実験・演習、計測技術、解析技術、流体、熱、燃焼、原子力、エネルギーと社会
  • EES Advanced Laboratory Seminar
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : 実験・演習、計測技術、解析技術、流体、熱、燃焼、原子力、エネルギーと社会
  • EES Advanced Laboratory Seminar
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : 実験・演習、計測技術、解析技術、流体、熱、燃焼、原子力、エネルギーと社会
  • EES Advanced Laboratory Seminar
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : 実験・演習、計測技術、解析技術、流体、熱、燃焼、原子力、エネルギーと社会


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