Natural events, such as earthquakes, floods, etc., can play a significant role in triggering industrial accidents of various intensities (the so-called Na-Tech risk), so that their inclusion in a comprehensive risk assessment is very important. However, a detailed and comprehensive quantitative approach is often unrealistic, because of the extremely large number of calculations to be carried out and of scenarios to be analysed. A preliminary semi-quantitative methodology is here presented for the characterization of the safety level of the different equipment items located in an industrial site, with respect to seismic hazard. Still based on objective evaluations, the presented approach allows to reduce the calculation burden, rank the equipment items in terms of relative seismic risk, and to identify the most critical items which more urgently need further attention. Along with the proposed methodology, an example of its application to a real industrial case is presented.

中文翻译：

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化学加工行业的地震风险：关键设备识别的半定量方法

地震、洪水等自然事件可以在引发各种强度的工业事故（即所谓的Na-Tech风险）方面发挥重要作用，因此将其纳入全面的风险评估非常重要。然而，由于需要进行大量的计算和需要分析的场景，因此详细而全面的定量方法通常是不现实的。这里提出了一种初步的半定量方法，用于描述工业现场不同设备项目相对于地震危险的安全水平。仍然基于客观评估，所提出的方法可以减少计算负担，根据相对地震风险对设备项目进行排名，并确定更迫切需要进一步关注的最关键项目。除了所提出的方法之外，还介绍了其在实际工业案例中的应用示例。