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A modeling approach to assess the effectiveness of BLEVE prevention measures

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Author: Landucci, G. · Molag, M. · Reinders, J. · Tugnoli, A. · Cozzani, V.
Publisher: AIChE
Source:10th Process Plant Safety Symposium, Topical Conference at the 2008 AIChE Spring National Meeting, 15-31
Identifier: 520718
ISBN: 9781605602097
Keywords: Safety · Passive fire protection · Vessel time to failure · Explosions · Probability · Risk assessment · Domino effects · Escalation probability · Passive fire protection · Fire protection · Urban Development · Built Environment · Earth & Environment · UES - Urban Environment & Safety · ELSS - Earth, Life and Social Sciences


Distribution and storage of liquefied pressurised gases is a critical safety issue, often resulting in a very high individual and societal risk, at least in densely populated zones. Several risk assessments pointed out that this is mostly due to the possible occurrence of a Boiling Liquid Expanding Vapour Explosions (BLEVE) of the tank that may be exposed to an intense fire as a consequence of release scenarios. In the present work, a modelling approach is presented for the calculation of fired BLEVE probability. Simplified models were obtained for the estimation of the vessel time to failure with respect to the radiation intensity on the vessel shell. The time to failure was compared to a reference time required for effective mitigation actions and thus related to the escalation probability. The analysis of the effect of protective measures, such thermal insulating coating and pressure relief devices, on the time to failure allowed the identification of the necessary requirements for effective BLEVE prevention.