Abstract: Deflagration or explosion is possible in the radioactive waste incineration furnace in some unexpected conditions and accidents. The venting measure is necessary to decrease the furnace inner pressure of deflagration and explosion into a safety scope. In order to learn the explosion venting process and the main factors, CH₄ of similar combustion feature with the waste pyrloysate gas, is used as the simulative gas in the certain explosive condition to simulate the deflagration or explosion process. The result shows: the peak inner pressure of incineration furnace is nearly invariable when the vent open pressure is in 0.5—2.0 kPa. The peak inner pressure is the power function of the ratio of the vent area and the inner surface area if the vent open pressure,the gas characteristic and container shape are confirmed and the effect of venting tube is not considered. However, the venting tube and the buffer space out of the furnace are significant to venting process.

Key words: radioactive waste, incineration, explosion venting, vent open pressure, waste treatment