Radiological Impact of Radioactive Iodine Discharge after Hypothetical Nuclear Accident

A modeling was performed in this study for iodine isotopes discharge from a hypothetical nuclear research reactor of thermal power of 20 MW, due to hypothetical severe nuclear accident in case of loss of ventilation system. The committed effective doses CED for the public around the reactor site was calculated for various atmospheric stability classes, Pasquill categories (A-F), using health physics Hotspot 2.06 code. The model was applied for three cases; without explosion of water, with explosion of water, and fusion in air. The results in the first case show that the receptor received CED lower than the permissible dose at any downwind distance from the reactor. In the second case, the receptor located within the distances 1.2 Km to 4.5 Km from the reactor received CED slightly more than the permissible dose. And for the third case, the receptor located within 50 Km from the reactor received CED more than the permissible dose. All the previous results of CED be long to the reactor site stability class (F).