Chemical stability of caesium iodide deposits in air/steam atmosphere

Iodine compounds that may be released in case of severe nuclear accident will have important radiotoxicity if they are disseminated air. One the most iodine species is CsI deposited on surfaces reactor coolant system. However, depending conditions, can volatilize or react with oxidants to produce I2(g). Theoretical and experimental studies demonstrate oxidation iodide depends temperature presence gas. It also slightly influenced by crystallinity particles nature support. In a high deposition, release started at lower than 300 °C. For vapour aerosol depositions, detected only above 450 °C become very 550