抄録
The leakage and combustion of liquid sodium in the sodium-cooled fast reactor could result in potential fire hazards. An experimental study of sodium fire in a columnar flow was conducted to investigate the burning characteristics by analyzing the temperature fields in the burner. Liquid sodium of 210℃ was injected into a 7.9m^3 volume stainless steel cylindrical burner via a nozzle to shape a sodium fire. The temperature data of typical positions in the burner was collected by dozens of thermocouples that were fixed in the combustion space and sodium collection plate. The sodium fire in a columnar flow was composed of the foregoing spray fire, subsequent centered columnar fire and pool fire on the collection plate. The temperature in the combustion space close to the burning sodium flow could maximally reaches up to 913.8℃. The radial temperatures apart from the sodium flow were relatively low and generally about 150℃-300℃. The maximum temperature of the burning sodium dropping on the collection plate rose in the position of Td3, to about 640.6 ℃. This study is promising to evaluate the combustion characteristics, formation process and composing forms of the sodium fire in the sodium-related facilities.
