Risk analysis of offshore rocket launch propellant filling system under data and knowledge scarcities

To improve the reliability of offshore launch propellant filling systems and mitigate potential hazards in the case of data and knowledge scarcity, a weighted Failure Mode and Effect Analysis (weighted-FMEA) methodology is proposed. A detailed hazard identification framework is proposed to identify potential failure modes of the systems. The Best Worst Method and a comparative matrix is then combined to unify the differences between systems and components. Subsequently, the grey theory is used to mitigate the subjectivity/uncertainty of experts’ judgment. Critical failures and corresponding preventive actions are recommended based on the analysis results. The superiority of the proposed model is confirmed by a comparison analysis with existing methods. Overall, the proposed weighted-FMEA model helps to prevent accidents and ensures the safe operation of offshore propellant-filling systems.