実験と数値モデルによる家屋内の放射性物質の浸入経路と沈着分布の調査

Autor: Shogo Takahara, Jun Hirouchi, Masashi Iijima, Masatoshi Watanabe, Masahiro Munakata
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Radiation Physics and Chemistry. 140:127-131
ISSN: 0969-806X
Popis: In order to lift of an evacuation order in evacuation areas and return residents to their homes, human dose assessments are required. However, it is difficult to exactly assess indoor external dose rate because the indoor distribution and infiltration pathways of radionuclides are unclear. This paper describes indoor and outdoor dose rates measured in eight houses in the difficult-to-return area in Fukushima Prefecture and identifies the distribution and main infiltration pathway of radionuclides in houses. In addition, it describes dose rates calculated with a Monte Carlo photon transport code to aid a thorough understanding of the measurements. The measurements and calculations indicate that radionuclides mainly infiltrate through visible openings such as vents, windows, and doors, and then deposit near these visible openings; however, they hardly infiltrate through sockets and air conditioning outlets. The measurements on rough surfaces such as bookshelves implies that radionuclides discharged from the Fukushima-Daiichi nuclear power plant did not deposit locally on rough surfaces.
Databáze: OpenAIRE
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