[1K15-19] Environmental Radioactivity and Monitoring 3

[1K17] Dissolution of radiocesium-bearing microparticles released by the Fukushima nuclear accident

*Taiga Okumura¹, Noriko Yamaguchi², Terumi Dohi³, Kazuki Iijima³, Toshihiro Kogure¹ (1. UTokyo, 2. NARO, 3. JAEA)

Keywords:radiocesium-bearing microparticle, CsMP, dissolution, pure water, seawater, electron microscopy, Fukushima nuclear accident

To determine dissolution rates of radiocesium-bearing microparticles (CsMPs) released by the Fukushima nuclear accident, we conducted dissolution experiments of CsMPs by reaction with pure water and seawater at several temperatures. According to the experiments, CsMPs may be completely dissolved and extinguished in several decades and several years in pure water and seawater, respectively.