This study aims at identifying the parameters that govern the environmental costs in oil and gas projects. An initial conceptual model was proposed. Next, the costs of environmental management work packages were estimated, separately and were applied in project control tools (WBS/CBS). Then, an environmental parametric cost model was designed to determine the environmental costs and relevant weighting factors. The suggested model can be considered as an innovative approach to designate the environmental indicators in oil and gas projects. The validity of variables was investigated based on Delphi method. The results indicated that the project environmental management's weighting factor is 0.87% of total project's weighting factor.
Introduction: The purpose of this study was to combine the two methods of Tripod beta and SCAT to analyze the accidents, explain their leading details, and track the roots of events at the depth of organizational layers.Methods: This analytical-descriptive study was carried out in one of the steel companies in Iran. To conduct the study, we analyzed one of the death- leading events using the combination of SCAT and Tripod methods. We investigated the relationship between variables and analyzed the intermediate and root causes of the event by Tripod beta method. Moreover, we proposed some control measures in the SCAT cause and effect table. The information achieved from the questionnaire and effects of the accidents' causes were studied and rated using the chi-square test and Friedman test, respectively.Results: The most important direct cause of the accident was "removal of bucket wheel (in the Boom Claimer device) from the shaft". The most important intermediary cause of the event was "lack of an appropriate immune system at the time of balance weight release". The most important rudimentary cause of the event was "inappropriate location of the device cabin in the original design". Furthermore, the most important control measure was “using harvesting equipment with new design".Conclusion: According to the statistical tests, we found a systematic connection between root causes and intermediate causes of the incident. Moreover, we observed that the effect of root causes and intermediary causes were not similar regarding the accident.
The present study provides a framework for assessing the environmental risk associated with fire and explosion of gasoline storage tanks in oil depots. The proposed framework includes three main steps: problem formulation, risk analysis, and risk description. The necessary basic details were identified and collected in formulating the problem. The source, pathway, receptor (SPR) model was employed in the risk analysis process. Each part was analyzed using tools that provide appropriate results and maintain the model integrity; additionally, the findings can be used in the whole process. The Dow Fire and Explosion Index (F&EI) was deployed to scrutinize the source, the pollutant dispersion and transmission path characteristics were measured to inspect the pathway, and the vulnerability indicators of the receptor and the degree of impact were determined to scrutinize the receptor. Finally, the risk assessment results were presented in the form of risk description tables. The purpose of this integration was to develop a framework thoroughly evaluating the risk associated with fire and explosion to the point of environmental consequences and providing a better understanding of the outcomes. This study, conducted for the first time specifically for an oil depot, provides an exhaustive view highly contributing to managers and decision makers.
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