Gas Dispersion

The accidental release of a gas or vapour cloud of a toxic or flammable chemical is a potential hazard to people in the vicinity of a facility storing or processing such chemicals. For a toxic substance, the gas or vapour cloud could lead to a person receiving a toxic dose of the substance leading to ill-health or death. A vapour cloud of a flammable substance could ignite leading to a flash fire, where the whole flammable cloud rapidly burns, which could expose people to thermal radiation from the fire potentially leading to injury and death.

Gas Dispersion Models

• Models have been developed for the study of gas dispersion: all of them consider the conditions that may influence the dispersion of the gas.
• Important to provide evacuation scenarios in case of leakage.
• Help to determine shape and concentration of the cloud and the area affected.
• Help to generate some risk assessments.

Methodology