[2M14-17] Accident Chemitry 2

[2M15] Investigation of in-reactor cesium chemical behavior in TEPCO’s Fukushima Daiichi Nuclear Power Station accident

(5)Simulation Study on Cs-bearing particle formation with vaporized Si and Cs

*Akihiro Suzuki¹, Kenichi Ito², Shunichiro Nishioka^4,3, Masahiko Osaka^4,3 (1. NFD, 2. TEPCO, 3. JAEA, 4. IRID)

Keywords:Cs-bearing particle, aerosol growth, gas phase reaction and solidification process, vaporized Si, vaporized Cs

To simulate the formation of micron-size spherical Cs-bearing particles, vaporized Cs and Si were reacted under high temperature water-vapor atmosphere and solidified in the gas phase experimentally. With this simulation study, the possibility that the Cs-bearing particles (type A spherical particles) in the environment were formed by reaction-and-solidification process under the high temperature gas phase in RPV was confirmed.