Today, due to population growth and industry expansion, process accidents in the industry have also increased which causes damage to factory equipment and casualties. consequence assessment is used to predict these events. In this study, the consequences of carbon mixture emissions stored in tank in Bidboland refinery have been investigated and high-risk areas have been identified. Several scenarios were defined and the results showed that the second scenario, which was the rupture of the tank, is the worst possible event because the affected distance is about 1750 meters.