Thermal behaviour of sodium iodide in inert atmosphere under SFR severe accidental condition

Kondo, Toshiki; Ogawa, Kengo*; Nakagawa, Takeshi*; Kikuchi, Shin; Seino, Hiroshi

no journal, , 

In this study, as a first step to understand the formation behaviour of gaseous iodine under Sodium-cooled fast reactor sever accident condition, gas evolution from sodium iodide (NaI) in an inert atmosphere was investigated using a Temperature Programmed Desorption-Mass Spectrometry (TPD-MS) apparatus. NaI is expected to be formed by reacting iodine as the fission product with sodium as the coolant. The result was suggested that thermal behaviour of NaI over about 660 Celsius degree was apparently phase change from solid to liquid/gas and formation of gaseous iodine was negligible in an inert atmosphere.