Modelling an integrated impact of fire, explosion and combustion products during transitional events caused by an accidental release of LNG

Til Baalisampang, Rouzbeh Abbassi, Vikram Garaniya, Faisal Khan, Mohammad Dadashzadeh

Research output: Contribution to journalArticle

15 Citations (Scopus)
13 Downloads (Pure)

Abstract

In a complex processing facility, there is likelihood of occurrence of cascading scenarios, i.e. hydrocarbon release, fire, explosion and dispersion of combustion products. The consequence of such scenarios, when combined, can be more severe than their individual impact. Hence, actual impact can be only represented by integration of above mentioned events. A novel methodology is proposed to model an evolving accident scenario during an incidental release of LNG in a complex processing facility. The methodology is applied to a case study considering transitional scenarios namely spill, pool formation and evaporation of LNG, dispersion of natural gas, and the consequent fire, explosion and dispersion of combustion products using Computational Fluid Dynamics (CFD). Probit functions are employed to analyze individual impacts and a ranking method is used to combine various impacts to identify risk during the transitional events. The results confirmed that in a large and complex facility, an LNG fire can transit to a vapor cloud explosion if the necessary conditions are met, i.e. the flammable range, ignition source with enough energy and congestion/confinement level. Therefore, the integrated consequences are more severe than those associated with the individual ones, and need to be properly assessed. This study would provide an insight for an effective analysis of potential consequences of an LNG spill in any LNG processing facility and it can be useful for the safety measured design of process facilities.
Original languageEnglish
Pages (from-to)259-272
Number of pages14
JournalProcess Safety and Environmental Protection
Volume128
Early online date12 Jun 2019
DOIs
Publication statusPublished - 1 Aug 2019

Keywords

  • LNG spill
  • accident transition
  • integrated consequence
  • CFD
  • Integrated consequence
  • Accident transition

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