[2P18-21] Source Term

[2P20] Effects of Boron on the chemical behavior of Cesium and Iodine in the Reactor Coolant System condition during LWR severe accident

(2) Effects of Boron vapor species on chemical behavior of deposited Cesium Iodide.

*Junpei Imoto¹, Shuhei Miwa¹, Melany Gouello², Naoya Miyahara¹, Masahiko Osaka¹ (1. JAEA, 2. VTT)

Keywords:Fission Product, Boron, Cesium iodide, Chemical reaction

To elucidate the chemical influence of boron (B) vapor species on deposited cesium iodide (CsI) in the reactor coolant system, we performed reaction experiment for deposited CsI and B vapor species in a steam atmosphere. It was found that the formation of gaseous iodine is promoted by chemical reaction between the deposited CsI and B vapor species.