Investigation of in-reactor cesium chemical behavior in TEPCO's Fukushima Daiichi Nuclear Power Station accident, 5; Simulation study on Cs-bearing formation with vaporized Si and Cs

Suzuki, Akihiro*; Ito, Kenichi*; Nishioka, Shunichiro; Osaka, Masahiko  

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.