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RR789 - LNG source term models for hazard analysis

A review of the state-of-the-art and an approach to model assessment

In 2006, the Health and Safety Laboratory (HSL) undertook a research project to develop tools for the National Fire Protection Agency (NFPA) Liquefied Natural Gas Technical Committee to evaluate liquefied natural gas (LNG) dispersion models. The work was commissioned by the Fire Protection Research Foundation (FPRF) and delivered a Model Evaluation Protocol (Ivings et al., 2007) which included a checklist of model evaluation criteria and a structure for complete model evaluation. A partial evaluation of some common current dispersion models was also carried out. Subsequently, FPRF let a subcontract to HSL to create a database of full scale experimental trials and wind tunnels tests which can be used to validate LNG dispersion models. This work has recently been completed.

The current project is concerned with the assessment of source term models for LNG spills that are used to provide an input to the LNG dispersion models. This work has been jointly funded by the UK Health and Safety Executive (HSE) and FPRF and aims to provide a state-of-the-art review of source term models which predict the early development of a release of LNG and an approach for assessing the adequacy of such models.

This report and the work it describes were jointly funded by the Health and Safety Executive (HSE) and the Fire Protection Research Foundation (FPRF). Its contents, including any opinions and/or conclusions expressed, are those of the authors alone and do not necessarily reflect HSE or FPRF policy.

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Updated 2010-04-20