I.chem.e. Symposium Series No. 110 Risk Assessment for the Siting of Developments near Liquefied Petroleum Gas Installations

A computer based model has been developed by HSE for quantified risk assessment of above ground LPG installaty ions, initially for vessels up to 300 te. A representative set of events and their associated frequencies has been used to predict individual and societal risk levels. Sensitivity studies indicate that the BLEVE event frequency and, to a lesser extent, fireball mass have most significance on the predicted risk levels. Societal risk is shown to be strongly affected by the location of the population and assumptions regarding its density. The model gives reasonable agreement with another assessment method which has been used in Holland to develop siting criteria._ It is concluded that the model could be used as the basis for a LPG siting and development control policy in the U.K.