Activity concentrations of environmental samples collected in Fukushima Prefecture immediately after the Fukushima nuclear accident

Masahiro Hosoda, Shinji Tokonami, Hirofumi Tazoe, Atsuyuki Sorimachi, Satoru Monzen, Minoru Osanai, Naofumi Akata, Hideki Kakiuchi, Yasutaka Omori, Tetsuo Ishikawa, Sarata K. Sahoo, Tibor Kovács, Masatoshi Yamada, Akifumi Nakata, Mitsuaki Yoshida, Hironori Yoshino, Yasushi Mariya, Ikuo Kashiwakura

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Radionuclide concentrations in environmental samples such as surface soils, plants and water were evaluated by high purity germanium detector measurements. The contribution rate of short half-life radionuclides such as 132I to the exposure dose to residents was discussed from the measured values. The highest values of the 131I/137Cs activity ratio ranged from 49 to 70 in the environmental samples collected at Iwaki City which is located to the south of the F1-NPS. On the other hand, the 132I/ 131I activity ratio in the same environmental samples had the lowest values, ranging from 0.01 to 0.02. By assuming that the 132I/ 131I activity ratio in the atmosphere was equal to the ratio in the environmental samples, the percent contribution to the thyroid equivalent dose by 132I was estimated to be less than 2%. Moreover, the contribution to the thyroid exposure by 132I might be negligible if 132I contamination was restricted to Iwaki City.

Original languageEnglish
Article number2283
JournalScientific reports
Volume3
DOIs
Publication statusPublished - Aug 15 2013

    Fingerprint

ASJC Scopus subject areas

  • General

Cite this

Hosoda, M., Tokonami, S., Tazoe, H., Sorimachi, A., Monzen, S., Osanai, M., Akata, N., Kakiuchi, H., Omori, Y., Ishikawa, T., Sahoo, S. K., Kovács, T., Yamada, M., Nakata, A., Yoshida, M., Yoshino, H., Mariya, Y., & Kashiwakura, I. (2013). Activity concentrations of environmental samples collected in Fukushima Prefecture immediately after the Fukushima nuclear accident. Scientific reports, 3, [2283]. https://doi.org/10.1038/srep02283