Discovery of non-spherical heterogeneous radiocesium-bearing particles not derived from Unit 1 of the Fukushima Dai-ichi Nuclear Power Plant, in residences five years after the accident

Shogo Higaki, Yuichi Kurihara, Hiroko Yoshida, Yoshio Takahashi, Naohide Shinohara

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Non-spherical heterogeneous radiocesium-bearing particles were found on masks worn during cleaning work in residences near the Fukushima Dai-ichi Nuclear Power Plant (FDNPP), from which residents had evacuated. Three slightly larger (6.6–12 μm) non-spherical radiocesium-bearing particles were found in a residence in Futaba Town, a straight distance of 2.11 km west-northwest from the FDNPP. These were collected on October 25, 2016, 5 years and 7 months after the Fukushima Dai-ichi nuclear disaster and were presumed to originate from the Plant's Unit 2 based on the measured radioactivity ratio of 134Cs/137Cs. The main elemental composition was similar to particles already reported in other studies. However, this is the first time that such particles had a clearly heterogeneous distribution.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalJournal of Environmental Radioactivity
Volume177
DOIs
Publication statusPublished - 2017 Oct 1

Keywords

  • Cesium
  • Fukushima
  • Pollution
  • Radioactivity
  • Radiocesium-bearing particles

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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