ABSTRACT:

The determination of the consequences of releases of LNG from process equipment or pipelines is one of the key issues in the design of LNG terminals. Situations which represent unacceptable impacts on population should be avoided. The effects of accidental discharge of LNG are determined using a comprehensive software, which allows to investigate the potential incident from the very beginning, calculating the release rate, pool spreading and vapourisation and eventually modeling the dispersion and the effects of the release. The simulations output include in particular the distances to Lower Flammable Limit (LFL) and 50% LFL and the heat radiation levels from jet fires. Firstly major hazards are identified for each section of the process, then the credible top events selected and modeled. Based on the results of the consequence modeling and the impact levels that should not be exceeded at defined land use areas, a decision could be taken for site selection and layout, in compliance with safety regulations. In particular discharges of LNG from piping and pipelines following significant ruptures are assessed thus determining the impact levels in terms of gas cloud concentrations and heat radiations. The above described approach has been used for site selection and plant layout for a project currently being developed by Edison

This content is only available via PDF.
You can access this article if you purchase or spend a download.