[1A07-10] Reaction of Cesium with Stainless Steel

[1A08] Microstructure of Cs chemisorbed stainless steel type 304

*Eriko Suzuki^1,2, Kunihisa Nakajima¹, Shuhei Miwa¹, Masahiko Osaka¹, Naoyuki Hashimoto², Shigehito Isobe² (1. JAEA, 2. Hokkaido Univ.)

Keywords:Cs chemisorption, Observation of microstructure, Stainless steel

In order to clarify the revaporization behavior of cesium (Cs) chemisorbed onto stainless steel under severe accident conditions, the chemical form and distribution of fine Cs chemisorbed compounds were investigated using microscopic analytical methods. It was found that the chemial form and crystal structure differed according to the temperature of Cs chemisorption and depth from the surface. The difference can affect the revaporization rate and revaporized species.