Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Fundamental study on volume reduction of cesium contaminated soil by using magnetic force-assisted selection pipe

  • Received : 2021.06.29
  • Accepted : 2021.08.06
  • Published : 2021.09.30
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Abstract

Advanced classification of Cs contaminated soil by using a magnetic force-assisted selection pipe was investigated. A selection pipe is a device that sort particles depending on their particle size, based on the relationship between buoyancy, drag, and gravity force acting on the particles. Radioactive cesium is concentrated in small-particle size soil components with a large specific surface area. Hence, the volume of the Cs contaminated soil can be reduced by recycling the large-particle size soil components with low radioactive concentration. One of the problems of the selection pipe was that the radioactive concentration of the stayed soil in the selection pipe exceeds 8000 Bq/kg, which is the standard value of recycling of Cs contaminated soil, due to low classification accuracy. In this study, magnetic fields were applied to the lab-scale selection pipe from upper side to improve the classification accuracy and to reduce the radioactive concentration of the stayed soil.

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Acknowledgement

This research was partly supported by Kikuchiseisakusho Co., Ltd.

References

  1. Ministry of the Environment (Japan), "Environmental Remediation in Off-site of Fukushima Dai-ichi Nuclear Power Station," September 21, 2020; online: https://www.meti.go.jp/english/earthquake/nuclear/decommissioning/pdf/moe_side_event.pdf (Last viewed on June 28, 2021).
  2. J. Hidaka, "Wet-Classification of Fine Powder," Journal of the Research Association of Powder Technology, Japan, vol. 13, no. 2, pp. 81-94, 1976. https://doi.org/10.4164/sptj1964.13.81
  3. M. Okumura, H. Nakamura, and M. Machida, "Mechanism of Strong Affinity of Clay Minerals to Radioactive Cesium: First-Principles Calculation Study for Adsorption of Cesium at Frayed Edge Sites in Muscovite," Journal of the Physical Society of Japan, vol. 82, pp. 033802, 2013. https://doi.org/10.7566/JPSJ.82.033802
  4. R. Ravaud, G. Lemarquand, and V. Lemarquand, "Halbach structures for permanent magnets bearings," Progress In Electromagnetics Research M, vol. 14, pp. 263-277, 2010. https://doi.org/10.2528/PIERM10100401
  5. National Institute of Agro-Environmental Sciences (Japan), Information on Agricultural and Environmental Research Results: vol. 13, "Typology and regional characteristics of clay mineral composition in lowland soils in Japan," 1996; online: http://www.naro.affrc.go.jp/archive/niaes/sinfo/result/result13/result13-02.html (in Japanese, Last viewed on June 28, 2021).
  6. Y. Yoshida, F. Mishima, Y. Akiyama, and S. Nishijima, "Study on Microscopic Dynamics of Cesium in Soils," Journal of the Society for Remediation of Radioactive Contamination in the Environment, vol. 3, no. 2, pp. 65-72, 2015.
  7. K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, and S. Nishijima, "Development of volume reduction method of cesium contaminated soil with magnetic separation," Progress in Superconductivity and Cryogenics, vol. 18, no. 1, pp. 10-13, 2016. https://doi.org/10.9714/PSAC.2016.18.1.010
  8. K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, and S. Nishijima, "Study on Volume Reduction of Cesium Contaminated Soil by Magnetic Separation," IEEE Transactions on Applied Superconductivity, vol. 26, no. 4, pp. 3700604, 2016.
  9. H. Horie, K. Yukumatsu, F. Mishima, Y. Akiyama, S. Nishijima, T. Sekiyama, S. Mitsui, and M. Kato, "Volume reduction of cesium contaminated soil by magnetic separation - Pretreatment of organic matters," Journal of Physics: Conference Series, vol. 871, pp. 012102, 2017. https://doi.org/10.1088/1742-6596/871/1/012102
  10. Y. Nishimoto, Y. Akiyama, H. Tsujimoto, M. Kawano, and K. Miura, "Study on Volume Reduction of Cesium Contaminated Soil by High Gradient Magnetic Separation: Design of Magnetic Filters," IEEE Transactions on Applied Superconductivity, vol. 31, no. 5, pp. 3700105, 2021.