(53a) Using CFD Effectively on Your Onshore QRA

Simoes, V., Risktec Solutions
Hart, F., Risktec Solutions Ltd
Computational Fluid Dynamics (CFD) is commonly used in offshore environments, primarily due to the high explosion hazard presented by the increased confinement and congestion in such facilities. CFD analysis in such cases allows realistic blast loads to be assessed without excessive conservatism. Onshore facilities are progressively becoming more congested and reduced spacing between equipment and occupied buildings have been noticed, thereby increasing the level of explosion hazard. The large scale of onshore facilities can still make full CFD assessment an expensive option. Onshore Facility Siting Studies (FSS) and Quantitative Risk Assessment (QRA) methods therefore remain the industry standard, but inherent conservatisms in the empirical modelling can result in expensive building retrofit recommendations. A methodology which offers the benefits of both approaches is therefore an attractive option. This paper discusses approaches to incorporate key insights from targeted CFD cases into an Onshore FSS/QRA, and how incorporating CFD in this way can offer refined analysis with minimal impact on overall budgets.


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