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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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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DOI: https://doi.org/10.1007/s10967-014-3752-3