Evaluation of cesium penetration behavior in concrete structural materials

Koshigoe, Koki*; Sato, Isamu*; Miyahara, Naoya*; Suzuki, Eriko   ; Osaka, Masahiko  ; Matsuura, Haruaki*

To elucidate cesium (Cs) penetration behaviour in concrete structural materials under Fukushima Daiichi Nuclear Power Station accident condition, penetration tests of CsCl and CsI into concrete were performed. The depth profile and chemical state of Cs in penetrated concrete were investigated by using XRF and EXAFS. As a result, it was found that the chemical state of Cs could be affected by volume ratio of coarse aggregates, whereas the depth profile of Cs could not be affected.