[1A09-12] Contaminated Concrete

[1A12] Diffusion behavior of iodide and cesium ions in hardened cement paste

*Takaya Kawato¹, Keisuke Ishida², Takeshi Yamamoto¹, Daisuke Minato¹, Kiyoshi Fujisaki², Takafumi Hamamoto², Morihiro Mihara³ (1. CRIEPI, 2. NUMO, 3. JAEA)

Keywords:Diffusion, EPMA, Iodine, Cesium, Cement pastes, Immersion test

A one-sided release immersion test was conducted to observe the diffusion behavior of iodine (I^-) and cesium (Cs⁺) ions in hardened cement paste. The test specimens were hardened cement pastes of different water-cement ratios that had been wet-air cured for more than 5 years. The analysis was carried out by elemental concentration surface analysis at depth using EPMA.