[2E14-18] Evaluation of severe accident and Cs behavior

[2E17] Chemical reaction behavior between cesium hydroxide and iron oxides

*Jumpei Imoto¹, Kunihisa Nakajima¹, Masahiko Osaka¹ (1. JAEA)

Keywords:Cesium, Iron oxides, Chemical reaction, Chemisorption

CsOH chemisorption onto stainless steel surface is suggested to occur during a light water reactor severe accident and CsFeO₂ could be formed. In order to elucidate such a chemisorption behavior, it is necessary to examine chemical reaction behavior with iron oxides formed on the stainless steel surface. In this study, chemical reaction behavior between CsOH and iron oxide was investigated by using mixed powders of CsOH・H₂O and iron oxides, i.e., goethite (α-FeOOH), hematite (α-Fe₂O₃), and magnetite (Fe₃O₄). As the result, it was found that goethite and hematite were more reactive than magnetite.