Study on Fire Risk Assessment on Irradiation Room under Stuck Radioactive Sources

Ignition temperatures of common radiation cargo in irradiation room were measured through the experiment, minimum ignition temperature is 210 °C. In order to discuss the temperature variation under stuck radioactive sources, two fire scenarios were presented and simulated by FDS. The results show that temperatures rise rapidly when stuck radioactive sources broke out within an hour. As the growth of the time, temperatures in irradiation room are rising, but the rising rate is slowing. In fire scenario A and B, the incidents of stuck radioactive sources occur in 9 days, 4 days later, local temperatures can reach 210 °C, and radiation cargo may be ignited. The results of the research can provide reference for fire risk judgment and assessment in irradiation room.