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establish a set of credible explosion scenar- ios that will be applied in CFD simulations to identify the explosion load proles with time and space. Calculation of the explosion risk requires definition of the explosion frequency and related consequences, the former of which is dened as the product of leak frequency and ignition probability. e probabilistic exceed- ance curve approach is applied to obtain the design explosion loads in terms of overpres- sure, drag force, and pressure impulse. e consequences can be dened via nonlinear structural analysis performed for explosion design loads. e probabilistic exceedance curve approach is applied to obtain the design explosion loads in terms of overpressure, drag force, and pressure impulse. It is worth repeating that the modeling techniques employed in this analysis must be validated, and it is strongly recommended that, if possible, an experimental database of explosion loads and structural failure modes obtained in full-scale or at most large-scale test structures be compiled. If the calculated risk level is greater than the acceptable risk level, then the system must be redesigned and/or risk control options, such as a blast wall, must be adopted. MTJerzy Czujko is with Nowatec AS in Norway. Jeom Kee Paik is a professor in the Department of Naval Architecture and Ocean Engineering at Pusan National University in Korea. April 2012 www.sname.org/sname/mt LEARN MORE For more information about the issues described in this article, check out the following resources. J.K. Paik and J. Czujko, Quantitative assessment of hydrocarbon explosion and ?re risks in oshore installations,? Marine Structures , volume 24 (2011). J.K. Paik and J. Czujko, Explosion & ?re engineering of FPSOs,? FABIG newsletter, issue 58, Fire and Blast Information Group (2011). J.K. Paik and J. Czujko, Assessment of hydrocarbon explosion and ?re risks in oshore installations: Recent advances and future trends,? The IES Journal Part A , volume 4, number 3 (August 2011).