Application of Hierarchical Analyst Domino Evaluation System (HADES) in offshore oil and gas facilities' decommissioning: A case study

Offshore facilities need to be decommissioned after completing their design lives. Quantity Risk Assessment (QRA) is usually compulsorily required in the offshore industry, but current QRA technology for decommissioning projects still has some gaps that filled. Most technologies can only used static risk assessment before project starts, which may underestimate involved operations. Therefore, sophisticated stationery and dynamic techniques must developed projects. This paper proposes Hierarchical Analyst Domino Evaluation System (HADES) decommissioning, it considers domino effect accidents (DEAs). Integrating Analytic Hierarchy Process (AHP) into QRA, multiple layers of accident analysis are carried out each procedure by taking two triggering mechanisms as core obtaining more accurate results. Furthermore, designing a causality matrix classify stratify identified hazards. Correspondingly, targets criteria database established judging situations also ground-breaking. To demonstrate advantages HADES, North Sea platform West Hutton employed case study analyze procedures identify hazards process. These classified stratified one primary layer several further assessment. The results very close those published, proving HADES system's feasibility.