Natural events triggering technological scenarios (Natech events) are an increasing concern for regulatory authorities and industry, in particular in areas prone to natural disasters. A comprehensive analysis of the occurrence of Natech scenarios affecting the process industry is presented. A dataset of 9100 past accidents that took place in the last 70 years was compiled and analysed, with the aim of understanding the trend of Natech events, their geographical distribution, the final technological scenarios, and the associated consequences in terms of human losses and asset damages. Meteorological events, such as storms, extreme temperatures and lightning were found to be the main trigger of Natech scenarios (86%). Despite the difficulty in collecting homogeneous data worldwide, an increasing number of Natech events over the time is observed. Moreover, specific increases in the occurrence of Natech events correspond to the occurrence of severe natural disasters as the devastating hurricanes that affected the Gulf of Mexico in recent years. The societal risk curve associated to Natechs was calculated, evidencing the relevance of extremely severe accidents (> 100 deaths). The analysis of the dataset also allowed building quantified event trees for the evolution of Natech scenarios. Specific ignition probability values for Natech events were estimated.

引发技术情景的自然事件（Natech事件）越来越引起监管机构和行业的关注，尤其是在容易发生自然灾害的地区。对影响工艺行业的Natech场景的发生进行了全面分析。汇编并分析了过去70年来发生的9100起过去事故的数据集，目的是了解Natech事件的趋势，其地理分布，最终技术方案以及相关的人员伤亡和财产损失后果损害赔偿。气象事件，如暴风雨，极端温度和闪电被认为是Natech情景的主要触发因素（86％）。尽管很难在全球范围内收集同类数据，但随着时间的推移，观察到的Natech事件不断增加。此外，Natech事件发生的具体增加与严重自然灾害的发生相对应，因为近年来发生的破坏性飓风影响了墨西哥湾。计算了与Natechs相关的社会风险曲线，证明了极端严重事故（> 100人死亡）的相关性。数据集的分析还允许为Natech场景的演变建立量化的事件树。估计了Natech事件的特定点火概率值。数据集的分析还允许为Natech场景的演变建立量化的事件树。估计了Natech事件的特定点火概率值。数据集的分析还允许为Natech场景的演变建立量化的事件树。估计了Natech事件的特定点火概率值。