Daily variation of I-131, Cs-134 and Cs-137 activity concentrations in the atmosphere in Osaka during the early phase after the FDNPP accident

Journal of Radioanalytical and Nuclear Chemistry volume 303, pages1527–1531(2015)Cite this article

Abstract

To investigate the time variations of radionuclides discharged from the Fukushima Daiichi nuclear power plants accident, we started collecting aerosol samples in Osaka, Japan, using a high-volume sampler from March 15 to May 1, 2011. Atmospheric radioactivity concentrations of I-131, Cs-134 and Cs-137 were measured with germanium semi-conductor detectors. Only I-131 was detected in the early phase and two Cs-134.137 peaks were found in Osaka in April. Using the HYSPLIT model, we concluded that direct transportation of the air mass from the Fukushima area was responsible for such events.

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Acknowledgments

The author greatly thanks Dr. Haruo Tsuruta (Atmosphere and Ocean Research Institute, the University of Tokyo) for his sensible suggestion and discussion with HYSPLIT simulation.

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Affiliations

  1. Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan

    Zijian Zhang, Kazuhiko Ninomiya, Naruto Takahashi & Atsushi Shinohara

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  1. Zijian Zhang
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  2. Kazuhiko Ninomiya
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  3. Naruto Takahashi
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  4. Atsushi Shinohara
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Correspondence to Zijian Zhang.

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Zhang, Z., Ninomiya, K., Takahashi, N. et al. Daily variation of I-131, Cs-134 and Cs-137 activity concentrations in the atmosphere in Osaka during the early phase after the FDNPP accident. J Radioanal Nucl Chem 303, 1527–1531 (2015). https://doi.org/10.1007/s10967-014-3752-3

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Keywords

  • Radioactive iodine
  • Radioactive cesium
  • Time variation
  • Air-mass transportation