Thermal Characteristic Analysis of Sodium in Diluted Oxygen via Thermogravimetric Approach

As the main reactor type of fourth-generation nuclear power systems, sodium-cooled fast reactors are now designed and built worldwide. A sodium pool cooling circulation process is indispensable in a reactor. However, fire design basis accidents reactors. The hazard caused by sodium–oxygen reaction safety have attracted extensive attention. Dry powder widely used as an effective fire-extinguishing agent to control fire. will burn oxygen-depleted atmosphere when using dry cover In this study, change law thermogravimetry melted studied thermogravimetric analysis (TGA) apparent activation energy (Ea) obtained, which has linear relationship with oxygen concentration. results can provide reference for improving engineering standards suppression systems also be incorporated into simulation software improve accuracy simulations.