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

作者：Zhang Zijian^*; Ninomiya Kazuhiko; Takahashi Naruto; Shinohara Atsushi

来源：Journal of Radioanalytical and Nuclear Chemistry, 2015, 303(2): 1527-1531.

DOI：10.1007/s10967-014-3752-3

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

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.

• 出版日期2015-2