Abstract: Aiming at the safety problems caused by the tank car leakage in the vehicle parking lot for dangerous goods, the Event Tree Analysis was used to analyze the possible types of accidents, and it’s turned out that the key accident type is pool fire. Taking the example of a benzene tanker, ALOHA and PHAST software were used to quantitatively analyze the influence of external environment (wind speed, atmospheric stability,air humidity) and initial conditions (height above ground of leakage point, diameter of leakage hole) on pool fire. The results showed that the pool radius is large when tank truck leakage occurs, and it is possible to affect other tank truck and to have a domino effect by causing other vehicles to catch fire when there is a fire. There are no regulations on the collection of leaking liquid in code Vehicle parking lot for dangerous goods in chemical industrial park. On the basis of referring to relevant standards and regulations, the countermeasures for tank car leakage were put forward, it provides theoretical basis for reducing the influence of the fire pool accident in the vehicle parking lot for dangerous goods.

Key words: dangerous goods, vehicle parking lot, diffusion, pool fire, collecting facility