[1J01-04] 核種挙動

[1J01] 600℃以下の模擬事故環境下での水酸化セシウムとステンレス鋼の酸化鉄との反応

*譚 欣¹、村上 健太²、鈴木 達也¹ (1. 長岡技科大、2. 東大)

キーワード：セシウム、酸化鉄、化学反応、低温領域

The reaction of CsOH with reactor structural materials may attenuate or delay the release to the environment under severe accident. Recent studies have shown reaction with stainless steel to form ferrite below 600 ℃. Besides, the oxide film on stainless steel in BWR environment normally has a double layer structure with Fe₃O₄ and Cr rich spinel. Therefore, the purpose of this study is to investigate the effects of various chemical factors on the reaction of CsOH with Fe₃O₄. Specimens with different molar ratio of Cs and Fe would be heated at 300-600℃ under both inert(Ar) and vapor(Ar-H₂O) atmospheres. XRD is used to identify the composition of specimens after heating.