Today, one of the basic methods in engaging the decision making of senior managers for securing the organizations regarding assessing risks that the industries face, is the analysis of outcomes of processing accidents. The development of process industries is always associated with an increased risk of accidents. Therefore, paying attention to this case is a priority for the safety units in the oil refineries and petrochemical plants. The aim of this study was to investigate safe distance between the storage tanks of gasoline tanks in the petrochemicals of South Pars Region; comparisons to the American petroleum institute were studied. The maximum of length of flame and the ratio of length to radius of flame were measured 20 m and 2.6 m respectively. If occurrence of leakage and pool fire in one of these tanks, the maximum intensity of thermal radiation was equal to 13.7kw/m 2. Hence, there is a possibility to control of fire at a distance of 15 meters from the tanks to heat radiation due to a pool fire, thereby, domino effect does not occur in the event of fire.. The fire is controllable but in case of leakages aggregation and creation of flammable ponds around these tanks, the gathered radiator intensities have immediate explosion potential in the tanks. So, it is proposed, besides increasing the distance between the storage tanks, other measures like quality and safety inspection planning of the connections and controlling instruments of the tanks, inspection of the fire lighting equipment like hydrants, monitors, fire hose reels are done and performance of reaction maneuvers in emergency conditions can take place
The main gas arising from landfills is methane. The greenhouse effect of methane is 21 times more serious than that of carbon dioxide. On the other hand, this gas has a significant potential for producing energy, so that in cases of application of a suitable technology, a considerable energy from this gas could be extracted and used. One of the mathematical models used for estimation of the amount of methane potential in landfills is LANDGEM software, which was applied in the present research study. This was a descriptive-cross sectional study in which first, the data related to the amount of waste generated, population and landfill characteristics were collected. Then, Sanandaj (study area) population was estimated for different years of the study period with respect to selective growth coefficient. In the last phase, constant value of methane emission and methane production potential in Sanandaj landfill were specified using LANDGEM software. As a result, potential capacity for producing methane in Sanandaj landfill was estimated as 170 m 3 tG 1 and the amount of output methane during 2018, 2023, 2028 and 2033 is supposed to be 205, 410, 549 and 671 m 3 hG 1 , respectively. Indeed, production speed continues with a lower gradient from 2033 onward. Therefore, the results of current research can be used in designing and measuring the capacity of methane extraction systems from this landfill and in evaluation of Iran's contribution in global emission of greenhouse gases.
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