量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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The Fukushima Dai-ichi Nuclear Power Stations (FDNPS) accident on March 2011 cause released large amount of artificial radionuclides including 134Cs and 137Cs (radiocaesium) into environment (e.g. ocean, atmosphere and land). As of April 2015, radiocaesium activities in seawater had exponentially decreased over 10 time values compared to the pre-FDNPS accident by TEPCO’s monitoring data. On the other hand, these in sediment had decreased slowly than those in seawater and large fluctuation. However, there is still some controversy of transition process from seawater to sediment and behavior after the accumulation for radiocaesium. In the Fukushima coastal area, marine sedimentary environment depend on several factors such as freshwater and terrestrial material input via river and seabed topography. The aim of this study is to elucidate temporal variation and behavior of radiocaesium activities in seawater and sediment collected within the 30 km from the FDNPS during 2013-2014.
会議概要（会議名, 開催地, 会期, 主催者等）
International Symposium on Radiological Issues for Fukushima's Revitalized Future
The distributions of radiocaesium in seawater and sediment collected in the Fukushima coastal area
