New project on the analysis of contamination mechanisms of concrete at the Fukushima Daiichi Nuclear Power Station

福島第一原子力発電所のコンクリート汚染機構解明に関する新しいプロジェクト

山田 一夫*; 丸山 一平*; 駒 義和  ; 芳賀 和子*; 五十嵐 豪*; 渋谷 和俊*; 粟飯原 はるか   

Yamada, Kazuo*; Maruyama, Ippei*; Koma, Yoshikazu; Haga, Kazuko*; Igarashi, Go*; Shibuya, Kazutoshi*; Aihara, Haruka

For the decommissioning of a Nuclear Power Station (NPS) after a severe accident, estimation of contamination depth and radioactivity level in concrete is essential. This paper outlines a recently begun project on the analysis of the contamination mechanisms of concrete in the Fukushima Daiichi NPS. For this analysis, data on various parameters are required, such as the materials used in the NPS, the environmental conditions of the exposed concrete, the conditions of exposure during the accident and until decommissioning, and the fundamental transport characteristics of nuclides in concrete. These aspects of this project are illustrated with some examples.