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Report No.

Dissolution behavior of radiocesium-bearing microparticles released from the Fukushima Nuclear Plant

Okumura, Taiga*; Kogure, Toshihiro*; Yamaguchi, Noriko*; Dohi, Terumi   ; Fujiwara, Kenso ; Iijima, Kazuki  

Radiocesium-bearing microparticles (CsMPs) released from the Fukushima Nuclear Power Plant were revealed to be dissolved much more rapidly in seawater than pure water. In the case of hydrochloric acid, the radioactivity of CsMPs considerably decreased at the beginning, but ceased to change with time. Secondary minerals were precipitated in the CsMPs dissolved in seawater, whereas a passive layer was formed around the surface of CsMPs dissolved in hydrochloric acid.



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