放射性炭素 : 環境中移行のモデル化に関する国際的な取り組み(第2部:和文)

概要

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Carbon-14 (<14>^C) is a particularly interesting radionuclide from the perspective of dose estimation due to the nuclear fuel cycle. The International Atomic Energy Agency (IAEA) programme on Environmental Modelling for RAdiation Safety (EMRAS) includes a tritium (3^H) and <14>^C working group (TCWG), the goal of which is to establish the confidence in the predictions of environmental 3^H and <14>^C models. The TCWG has developed two scenarios regarding <14>^C called "Rice scenario" and "Potato scenario", respectively, in which various model predictions were compared with observations. The rice scenario is supported by 10-year monitoring data from 1991 to 2001 collected by Japan Atomic Energy Agency (JAEA) around the Tokai reprocessing plant, which provides a good test of models that predict <14>^C concentrations in air and rice plants growing very close to a continuous atmospheric source of <14>^C. The potato scenario is based on the data obtained by a series of experiments on <14>^CO_2 exposure to crops in a wind tunnel, giving a model-data comparison on <14>^C dynamics in the plant under an acute exposure condition. This report presents some parts of ongoing discussion on the scenarios in the TCWG.
日本保健物理学会の論文