Combining disturbance simulation and safety analysis techniques for improvement of process safety and reliability

There is a clear link between safety and reliability in system design and operation. So the knowledge about sources of failure, their physical consequence related to plant operation and the frequency of effects (incident consequence) is of great value for improvement. Next, the selection of best improvement alternative should be justified by complete life cycle cost benefits. In this contribution, a quantitative merged process based on multiobjective decision analysis technique(Promethee), Extended Hazop methodology (Hazop supported by dynamic simulation), reliability modeling and life cycle cost modeling is presented. A distillation column unit is used as case study.