[1M01-03] セシウム挙動、水素発生

10:30 〜 10:45

[1M03] The reaction between cesium hydroxide and stainless steel oxidation products in a steam environment at 573K-773K

*譚 欣¹、鈴木 達也¹、村上 健太² (1. 長岡技科大、2. 東大)

キーワード：

水酸化セシウム、金属酸化物、吸湿性、高温水蒸気

This study investigates the reactions between cesium hydroxide (CsOH) and stainless steel oxidation products, magnetite (Fe₃O₄) and chromia (Cr₂O₃) in argon and argon-steam environments at 573K-773K. CsOH·H₂O and Fe₃O₄ or Cr₂O₃ powders were mixed and formed into cylindrical pellets, then pellets were heated under specified conditions. Post-test analyses included weight change, elemental distribution, and crystal phases. Results showed that the reactions between CsOH and Fe₃O₄ produced identical phases regardless of temperature and atmosphere, with the highest reaction rate around 673K and less hygroscopicity compared to CsOH. In contrast, reactions between cesium hydroxide and Cr₂O₃ resulted in similar appearances across different conditions and still exhibited high hygroscopicity.