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An improved method for quantitative risk assessment of unconfined offshore installations subjected to gas explosions

Xu, Y; Bai, Y; Paik, JK; Dai, W; (2020) An improved method for quantitative risk assessment of unconfined offshore installations subjected to gas explosions. Structures , 25 pp. 566-577. 10.1016/j.istruc.2020.03.019. Green open access

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Abstract

Previous related research has focused on consequences analysis of confined rather than unconfined structures against explosion accidents. This paper introduces an improved method for quantitative risk assessment of unconfined offshore installations subjected to gas explosions. In the present study, a floating, production, storage, and offloading unit (FPSO) is given as an example to present the proposed method. Instead of the most unfavorable scenario, lots of random scenarios are selected by the probabilistic sampling approach. The method for determining the equivalent gas cloud position is illustrated in the conversion between dispersion and explosion scenarios. Maximum and average overpressures are obtained by computational fluid dynamics (CFD) simulation. Besides overpressure exceedance curves, the combination of overpressure and probability method is adopted based on the definition of risk. This work allows finer scenarios’ sampling results and reduces the computational costs.

Type: Article
Title: An improved method for quantitative risk assessment of unconfined offshore installations subjected to gas explosions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.istruc.2020.03.019
Publisher version: https://doi.org/10.1016/j.istruc.2020.03.019
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Quantitative risk assessment, Gas explosions, Gas cloud position, Overpressure-probability combination
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10094831
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