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論文

Identification of penetration path and deposition distribution of radionuclides in houses by experiments and numerical model

廣内 淳; 高原 省五; 飯島 正史; 渡邊 正敏; 宗像 雅広

Radiation Physics and Chemistry, 140, p.127 - 131, 2017/11

BB2016-0282.pdf:0.39MB

 被引用回数:2 パーセンタイル:28.88(Chemistry, Physical)

The dose assessment for people living in preparation zones for the lifting of the evacuation order is needed with the return of the residents. However, it is difficult to assess exactly 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 zone in Fukushima prefecture to examine the distribution of radionuclides in a house and the main infiltration pathway of radionuclides. In addition, it describes also dose rates calculated with a Monte Carlo photon transport code to understand thoroughly the measurements. These measurements and calculations provide that radionuclides can infiltrate mainly through ventilations, windows, and doors, and then deposit near the gaps, while those infiltrate hardly through sockets and air conditioning outlets.

口頭

Radiation monitoring activities by Japan Atomic Energy Agency in response to the Fukushima Daiichi Nuclear Power Plant accident

三枝 純

no journal, , 

Immediately after the Fukushima Daiichi Nuclear Power Plant (NPP) accident, Japan Atomic Energy Agency (JAEA), as the Designated Public Institution for the implementation of emergency response measures against nuclear emergency situation, started an extensive range of radiation monitoring nationwide. The radiation monitoring includes air dose-rates measured with various types of instruments including aerial surveys, radioactivity concentrations of dust in air, soil, index-plants and so on. Acquired data are open to the public via the Internet website of the central government as well as in a public database developed by JAEA. The presentation outlines the framework of these activities and some of monitoring results obtained in the past five years.

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