Safety and Technical Protection Engineering
Abdolrahim Taheri; Dariush Nouri Bakhsh; mohsen motevasel; Gholamreza Rashed
Abstract
Chlorine is a toxic and oxidising gas used in Iran to purify drinking water. There has been no research into the effects of the gas or the explosion of the tank, which could cause irreparable damage to people and the surrounding area. No such research has been carried out in the city of Abadan. To this ...
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Chlorine is a toxic and oxidising gas used in Iran to purify drinking water. There has been no research into the effects of the gas or the explosion of the tank, which could cause irreparable damage to people and the surrounding area. No such research has been carried out in the city of Abadan. To this end, Aloha software (Aloha software is a special computer program that helps professionals understand what will happen in the event of a hazardous release, such as a chemical or fire. This helps them make plans to keep people safe.) Was used to assess the magnitude of the release, the various risk zones and the population at risk. The research shows that in the event of damage to the 1-inch outlet valve of the tank, the gas release could be felt up to a radius of 2 km, 6.2 km and 10 km. Due to the probability of occurrence and the location of the station in the wind direction, it is possible to reach a large number of residents within a 5 km radius of the station. Therefore, based on the FMEA model evaluation, the work prior to the chlorine gas meeting was prioritized to prevent the release of chlorine in the event of the tank settling.
Safety and Technical Protection Engineering
Abdolrahim Taheri; Soleimani torfi Soleimani torfi
Abstract
Pipelines are considered the most practical way to transport oil and gas. However, some factors such as corrosion, third party damage, etc. can lead to serious incidents. Appropriate risk assessment can help reduce the risk of pipeline systems. Prioritizing repairs, scheduling physical integrity assessments, ...
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Pipelines are considered the most practical way to transport oil and gas. However, some factors such as corrosion, third party damage, etc. can lead to serious incidents. Appropriate risk assessment can help reduce the risk of pipeline systems. Prioritizing repairs, scheduling physical integrity assessments, and developing emergency plans can’t be done properly without implementing an appropriate Risk Assessment Method. Risk consists of the Probability of Failure (PoF) and Consequence of Failure (CoF) and in many cases is obtained from the failure statistics published by the pipeline operators. In an endeavor to apply more engineering concepts to the highly statistics-dominated concept of risk assessment, the PoF can be calculated using Finite Element and Monte Carlo methods. This paper is specifically concerned with finding the PoF caused by excavations that are done neighboring a buried pipeline. which is a form of failure that is rarely considered, as most of the studies conducted about third party damages are concerned with the direct hit as a failure cause. Hence, a Python script was written that models the excavations using ABAQUS; The soil is modelled using the Mohr-Coulomb plasticity approach, while the pipe is modelled as a shell. The excavation adjacent to the pipe will cause the pipe to deflect due to gravity. The stress caused by this deflection is compared to the yield stress to determine whether or not it will fail. In order to determine the probability of failure (PoF), this iterative process is carried out for excavations of different sizes using a Monte Carlo method. Additionally, a methodology has been implemented to address the issue of computationally expensive models. The method proposed in this paper is compared and weighted against other common methods to determine whether the advantages of FEA-based risk assessment can justify its complexity.
Safety and Technical Protection Engineering
Danial Khodoli zangeneh; Hakimeh Amanipoor; Sedigheh Battaleb-Looie
Abstract
The importance of the study of Quaternary deposits has increased to such an extent that it now occupies a significant part of research in different parts of the world. In oil-rich countries, including Iran, pollution caused by oil industry activities such as drilling and exploitation has seriously threatened ...
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The importance of the study of Quaternary deposits has increased to such an extent that it now occupies a significant part of research in different parts of the world. In oil-rich countries, including Iran, pollution caused by oil industry activities such as drilling and exploitation has seriously threatened the sediments and soils around these areas. The Abteymour oilfield is one of the big fields in southwestern Iran, located in the area of agricultural lands. As a result, it is very important to evaluate its environmental effects. In this research, 33 surface soil samples were collected and in addition to measuring the concentration of heavy metals, some physical and chemical characteristics of the soil were measured. To identify the source of pollutants, statistical analyses such as correlation coefficient, principal component analysis, and cluster analysis were used. To determine the level of heavy metal pollution, environmental geological indices such as Igeo, EF, Cf, and NIP were used. The results of cluster analysis showed that the studied elements are clustered in two groups. Also, the results of the factor analysis showed that 89% of the variation of the studied parameters is affected by two factors. In total, the results of the statistical analysis showed that the pollution in the region is of anthropogenic origin and the activities related to the extraction and exploitation of the Abteymour oilfield, agricultural activities, and wastewater have an impact on the quality of the soil in the area. Investigation of the pollution level of the samples based on the Igeo, EF, Cf, and NIP indices showed that the samples are unpolluted for most of the studied elements. For the Na, Mg, Cr, Ni, Sr, Cu, Li, and Pb elements, some samples have low levels of pollution
Safety and Technical Protection Engineering
Ahmad Keshavarz; Seyed Mohammad Karim Hashemizadeh
Abstract
Oil spill is one of major marine environmental challenges. The main impacts of this phenomenon are preventing light transmission into the deep water and oxygen absorption, which can disturb the photosynthesis process of water plants. In this research, we utilize SpecTIR airborne sensor data to extract ...
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Oil spill is one of major marine environmental challenges. The main impacts of this phenomenon are preventing light transmission into the deep water and oxygen absorption, which can disturb the photosynthesis process of water plants. In this research, we utilize SpecTIR airborne sensor data to extract and classify oils spill for the Gulf of Mexico Deepwater Horizon (DWH) happened in 2010. For this purpose, by using FLAASH algorithm atmospheric correction is first performed. Then, total 360 spectral bands from 183 to 198 and from 255 to 279 have been excluded by applying the atmospheric correction algorithm due to low signal to noise ratio (SNR). After that, bands 1 to 119 have been eliminated for their irrelevancy to extracting oil spill spectral endmembers. In the next step, by using MATLAB hyperspectral toolbox, six spectral endmembers according to the ratio of oil to water have been extracted. Finally, by using extracted endmembers and SAM classification algorithm, the image has been classified into 6 classes. The classes are 100% oil, 80% oil and 20% water, 60% oil and 40% water, 40% oil and 60% water, 20% oil and 80% water, and 100% water.