Comprehensive data on ionising radiation from Fukushima Daiichi nuclear power plant in the town of Miharu, Fukushima prefecture: The Misho Project

T. Koike, Y. Suzuki, S. Genyu, I. Kobayashi, H. Komori, H. Otsu, H. Sakuma, K. Sakuma, E. M. Sarausad, K. Shimada, T. Shinozuka, H. Tamura, K. Tsukada, Mifuyu Ukai, T. O. Yamamoto

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Data related to radioactivity released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on 15 March 2011 gathered by residents of Miharu, Fukushima Prefecture, and by Tohoku University are presented. These data sets consist of (1) the earliest radiation monitoring by a Geiger counter in the town, (2) ratios of radioactivity between 132Te and 137Cs for a wide area between Fukushima and Tokyo, (3) radiation measurement of soil samples collected from 18 school grounds, and (4) external radiation exposure of 1400 students using OSL badges. By combining and analysing these various data sets, a curve for the cumulative total external exposure as a function of time, with 16 : 00 h on 15 March 2011 being time zero, is obtained. The average cumulative external dosage is estimated to be 10 mSv (σ = 4.2 mSv) over 10 years. In addition, the initiative that the residents of Miharu took in response to the FDNPP accident, which became known as The Misho Project (MP), is documented; in particular, the time at which the municipality instructed the immediate ingestion of iodine tablets by those under the age of 40, 13 : 00 h on 15 March 2011, is assessed.

Original languageEnglish
Pages (from-to)675-698
Number of pages24
JournalJournal of Radiological Protection
Volume34
Issue number3
DOIs
Publication statusPublished - 2014 Sep

Keywords

  • 131I
  • 132Te
  • 134Cs
  • 136Cs
  • 137Cs
  • Fukushima Daiichi nuclear power plant
  • Iodine tablets
  • Misho Project
  • OSL docimetry
  • Radiation survey
  • Radioactivity ratios

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Public Health, Environmental and Occupational Health

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