No abstract

In the event of the destruction or explosion of tanks with oil products, basic schemes for the distribution of pollutants have been developed in the area of a technical stop of a train at a distance of up to 1000 meters in all directions, taking into account all structures located in the study area. On the basis of an analytical assessment of the consequences of an emergency, it was shown that in the event of the destruction or explosion of railway tanks with oil products, from 90 to 95 % of economic and public facilities will be located in the zone of exceeding the MPC by 2-300 times. The limits for exceeding the permissible concentrations of polluting components in the parking area and flushing of tanks intended for the transit of oil and oil products have been established. The greatest excess will be at a distance of 300 meters from the tank car parking, where, for all priority polluting components, it is possible to exceed the MPC by 300 times. For a distance from the source of emissions more than 1000 meters in each direction of light, the calculation of the maximum permissible concentration of polluting components was performed.

The assessment of the protected evacuation of the population from the fire zone at social facilities in the service sector on the basis of numerical modeling methods has been carried out. The time of safe evacuation of people from the object on the basis of a basic mathematical model for monitoring fire hazards for a specific social object has been regulated. Correlations between the degree of heat and the fire duration have been recorded. Partial concentration of O2, CO2, CO, HCl, measures of smoke aerosol opacity from the fire duration using “Fogard” software package configured for simplified analytical model of human flow have been captured. On the basis of the developed mathematical model of fire development design solutions that provide a secure evacuation of the population from the object have been proposed. The calculation of the blockade duration of routes and passageways for sending people out of the fire zone was made using deterministic fire indicators has been performed.

We carried out an environmental audit on the territory of a specialized facility of all sources of environmental pollution and, accordingly, we measured the concentration of polluting components embodied in the atmospheric background. As a result of the inventory of emission sources, we recorded the following picture for the total emissions of pollutants into the air zone of the facility: 1.647832 t/year, including 1.597435 t/year in the liquid and gaseous state, and 0.050397 t/year in the solid state. We present the calculation of pollution from generators of emissions of the air zone of the facility, which is recorded on the basis of the Unified Atmospheric Pollution Calculation Program (UAPCP) “Ecolog” (version 3.0). According to the feasibility study, the dispersion calculation was recognized as socially effective for site 2 (hangar) - for NO2, NO, kerosene, CO, SO2, and abrasive dust. We calculated the surface concentrations of harmful substances in the atmosphere and constructed dispersion maps for the object for the winter period. The implemented research showed that the accumulation of contaminants does not reach the standard values of concentrations at key points suitable for determination at the boundary of the sanitary protection zone and the residential area. The dispersion calculation indicators showed that the predominant fraction of all diffusing contaminants for the hangar in the sanitary protection zone is NO2 0.82 parts of the maximum permissible concentration with and without background 0.697, and in the residential area, 0.11 parts of MPC without background.

The article studies the waste generated during the operation of the heat and power plant, an energy facility. The analysis of atmospheric pollution by emissions of the Voronezh HPP-1, which uses coal as the main fuel, was carried out. A comparison is made with a thermal power plant using gas as a fuel source. The maximum allowable emission standards for pollutants generated during the use of coal were established and the excess of the MPC value by various types of emissions was shown: dioxide and nitric oxide; fuel oil and NO2+SO2 ash; sulfurous anhydride and carbon monoxide; soot and coal ash. The size of the Sanitary Protection Zone of HPP-1 was determined. Measures aimed at reducing the negative environmental impact of energy facilities such as combined heat and power plants are proposed.