IMPROVEMENT OF ATMOSPHERIC AND OCEAN DISPERSION MODEL IN SUPPORTING SYSTEM FOR EMERGENCY RESPONSE TO MARITIME TRANSPORT ACCIDENT INVOLVING RADIOACTIVE MATERIAL

National Maritime Research Institute developed a supporting system for emergency response of competent authority to maritime transport accidents involving radioactive material. The supporting system for emergency response has functions of radiation shielding calculation, atmospheric and ocean dispersion simulation, and radiological impact evaluation to grasp potential hazard of radiation. To supply valuable information during operation in case of accident, the system contains various type of database and also has a function to visualize simulation results effectively. The databases consist of input data set for accident assessment such as nuclide composition of each transport packages as well as information on transport packages and transport vessels. To enhance functions of the supporting system for emergency response including measures to nuclear terrorism, feasibility of improvement of the current atmospheric and ocean dispersion model is discussed in this paper.