An analysis of radioactivity distribution in soil particles using an autoradiogram method

Tohru Ohnuma, Keizo Ishii

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

More than 22,000,000 m3 of soil was contaminated with cesium (Cs) radioisotopes following the accident at the Fukushima Daiichi Nuclear Power Plant. For site remediation, it is necessary to reduce this huge volume of contaminated soil. To achieve this, we investigated the distribution of contamination within soil particles. We measured the radioactivity distribution in soil particles using an autoradiogram (ARG) method, with a resolution of 50 × 50 μm, and also determined the elemental distributions with energy-dispersive X-ray spectroscopy. The ARG showed that almost all particles were uniformly contaminated with Cs radioisotopes, while the elemental distributions indicated that the particles were clay aggregates. These results suggest that, by impacting contaminated particles with each other and classifying them, we can reduce the volume of contaminated soil.

Original languageEnglish
Article number1326200
JournalCogent Engineering
Volume4
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Fukushima Daiichi NPP
  • autoradiogram
  • cesium 137
  • cesium radioisotopes
  • contaminated soil
  • radioactivity distribution

ASJC Scopus subject areas

  • Computer Science(all)
  • Chemical Engineering(all)
  • Engineering(all)

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