Assessment of individual risk for transmission pipeline carrying natural gas based on TZS method
Zhaowen Qiu · Journal of Safety Science and Technology · 2012
A quantitative assessment of potential individual risk for transmission pipeline carrying natural gas was conducted by TZS method.Fatal length was introduced to describe the individual risk at a specified location along a pipeline.The individual risk was usually expressed with a risk contour plot.The individual risk for Jingbian-Xi'an natural gas pipeline was analyzed.The calculation result showed:The individual risk is 1.37×10-5-3.38×10-51/a for the people who located 60 meters away from the Anbian-Zhao Jiakou natural gas pipeline,which is acceptable for most people reasonably.Also,the risk caused by external interference is 7.10×10-6-1.80×10-51/a,accounting for half of the total risk.It means that external interference is the dominate factor of the risk for natural gas pipeline transmission.The result can be useful for safety management of Jing-Xi natural gas transmission pipeline and the modification of a buried pipeline.