Abstract
On the basis of the characteristics of urban gas pipeline accidents, the risk assessment method based on domino effect is proposed. The domino scenarios are determined by analyzing major hazards that could trigger domino accidents of urban gas pipeline. Three risk assessment models of domino accidents are established: fire radiation model, explosion shock model and explosion fragment model. Then the probabilities are calculated to get the risk value and the influenced area of incidents. It is suggested that the geographic information system (GIS) of the urban gas pipeline be set up to carry on risk analysis and safety management of pipeline and surrounding hazards in case of the domino accidents.
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