Radiation Exposure Estimation Around the Reactor Due to Loss of Coolant Accident (LOCA) on ABWR

Loss of coolant accident in a nuclear reactor is an accident which is assumed be initialized by a leakage at the primary coolant piping or by a leakage at the reactor vessel. In this accident, the coolant will be released and can be followed by some radioactive fission product release to the primary containment, secondary containment and to the environment. Beside to the environment which be a risk to the public, fission product released also occurred to the control room that will be a risk to the operator. Releasing process, pathway, activity and the exposure dose to the environment and also to the control room are assessed and estimated in this paper. The activity which be released in the primary containment at the first two hours are 2,21 x 107 Ci for iodine and 3,43 x 108 Ci for noble gas. The increasing of the environment activity and in the control room are 3,1 x 104 Ci and 2,0 x 103 Ci for iodine and 7,0 x 106 Ci and 1,9 x 107 Ci for noble gas respectively