Mechhoud El-ArkamZennir Youcef2024-04-232024-04-232023-01-11http://dspace.univ-skikda.dz:4000/handle/123456789/1293Major accidents continue to occur in chemical process industry, which may have serious consequences costing billion dollars and what is worse many human lives. That means the traditional Hazard analysis techniques are not becoming enough due to the increasing complexity of industrial plants. The main objective of this work is to present a new accident analysis technique based on system theory that has been developed lately changing the focus from reliability to system theory, in order to improve safety and for a better manage of risk. The considered is High Density Polyethylene plant which located in the Skikda industrial zoneenArticle