Modeling of spatial and temporal assessment of territorial risk in case of accidents during transportation of chemically dangerous goods by rail

During the operation of railway transport, various pollutants are emitted into the atmosphere. Sources of pollutants on rail transport are divided into two main classes. The first class is moving sources. The second is stationary sources. From the standpoint of assessing the level of environmental safety and environmental protection, it is necessary to identify two main types of emissions of pollutants. The first type is an organized issue. For example, the emission of fuel combustion products during the operation of a locomotive. The second type is unorganized emission in case of emergencies at the stage of transportation of dangerous goods, their loading or unloading. For example, depressurization of the tank. This article considers the problem of unorganized emissions of chemically hazardous substances into the atmosphere during the operation of railway rolling stock. The transport of dangerous goods by rail poses a potential threat of large-scale environmental pollution in case of emergencies. The analysis of the situation shows that accidents on the railways of Ukraine occur quite often. The main causes of emergencies during the transportation of chemically dangerous goods by rail are: mechanical damage to capacitive equipment; corrosion, thermal action on capacitive equipment; depressurization of shut-off valves, welded joints; getting into the capacitive equipment of foreign substances; fatigue phenomena in metal, welded elements; equipment defects; errors during the design, manufacture, installation, repair of equipment; lack of optimization of routes for delivery of chemically dangerous goods to the consumer; collision of a train with motor transport at crossings. We should also not forget about the possibility of sabotage at railway facilities. For example, blasting tracks.