Abstract
In light of the escalating greenhouse effect and the increasing frequency of extreme weather events, the global spotlight has shifted towards the development of green energy solutions. Notably, Floating Offshore Wind Turbines (FOWTs) have gained prominence as a high-tech innovation in harnessing wind resources in deep-sea field. However, an expanded perspective that encompasses entire wind farms necessitates a more comprehensive approach to risk assessment and safety management.
This paper introduces the application of the Hierarchical Analyst Domino Evaluation System (HADES), originally designed for offshore oil and gas facilities decommissioning, to assess the domino risk of the Floating Offshore Wind Farm (FOWF) situated near the Wanning Sea area, Hainan, China. The assessment includes scenarios involving navigating vessels collisions, typhoons, storm surges, and large waves, which can lead to accidents such as capsizing, deviation, and structural damage. HADES offers a Quantitative Risk Assessment (QRA) framework that hierarchically models the development of domino accidents, providing a clear visualization of the accident progression. Unlike other domino risk assessment methods, HADES incorporates Frequentist Approach to reconstruct the trigger mechanisms and propagation logic of these accidents. HADES simplifies calculations and reduces the reliance on extensive historical data. Through the analysis of accident scenarios, probabilities, and consequences, this study aims to address the concerns of FOWF operators regarding the layout, operation, and monitoring of FOWTs. The results of the analysis indicate that due to the lower integration and density of equipment in FOWFs, domino incidents are unlikely to occur and propagate. The majority of domino events are caused by external structural failures of the FOWTs themselves and collisions with vessels within the wind farm area. The focus of research on domino accident assessment for FOWFs should be placed on the reliability of FOWT components such as blades, towers, floating foundations, and anchor chains, as well as on strategies to avoid collisions with vessels. This study enhancing our understanding and preparedness for potential accidents in this dynamic and critical sector.
