Abstract
Concern for the environment has increased in recent years throughout the world. With the development of the chemical production, NLS (noxious liquid substance) transportation has been increased in recent years, and the transportation of the chemical material poses a serious threat to the environment when it spills out, potentially to people far away from ship or terminal both in space and time. This paper deals with research on NLS danger in air. After research on environmental data (such as wind information, air temperature etc.), numerical analysis and PC calculation, the concentration and dose analysis of assumed accident in a port of Shanghai has been given out. Based on the concentration and dose data, some risk assessment of the accident has been given out, such as cancer risk and toxic risk. In the end, the authors try to give some suggestion to reduce the danger.
