Development of a framework for the risk assessment of Na-Tech accidental events

Definition of a shortcut methodology for assessing flood-related Na-Tech risk

“…The study cases used for validating the proposed simplified methodology refers to industrial plants for which results from a detailed QRA considering also Na-Tech events are available in the literature (Campedel et al, 2008a;Antonioni et al, 2009). This allows a comparison between the results of the proposed simplified methodology and the results of a much more detailed QRA.…”

“…As a first approximation, equipment vulnerability may be estimated using the data provided in Fig. 6, which reports in a simple and effective way the equipment damage probability as a function of water height and water velocity (Antonioni et al, 2009). Along the same line discussed elsewhere for earthquake-related Na-Tech events (Busini et al, 2011), since historical analytical methods reveal that storage tanks are the most likely to produce dramatic accidental scenarios in the case of industrial accidents triggered by natural events, reactors, pumps, pipes, and other items are overlooked.…”

“…where F is the cumulative frequency of accidents and N is the expected number of fatalities (Antonioni et al, 2009(Antonioni et al, , 2007Campedel et al, 2008b;Lees, 1996). The PLL index values obtained from the QRA are summarized in Table 3: the first one does not consider the flood event as initiator event for the industrial accident (PLL internal ) and the second one considers the flood as the initiator event (PLL flood ) (Campedel et al, 2008a), from which the increment of the risk due to the presence of the natural phenomenon can be estimated as…”

“…The most powerful tool to evaluate the impact that a natural event may have on industrial facilities is an extension of the classical quantitative risk analysis (QRA) to situations where an industrial accident is triggered by a natural event (Antonioni et al, 2007(Antonioni et al, , 2009Campedel et al, 2008b;Fabbrocino et al, 2005). A limitation of the QRA is that it requires large amounts of resources in terms of both time and expertise; thus, a shortcut methodology for the assessment of industrial risks induced by natural events, which should be easy to handle and capable of taking into account the most important phenomena that occur in a Na-Tech event, should be useful at least for screening purposes (i.e.…”

Efficiency of Seismic Isolation on Industrial Plants - Case Study of a Gas Tank

“…In the event of an earthquake, and following accidental scenario, the consequences may be severe for the neighborhood population, for the economy and for the environment [1]. In particular process plants, like process units, storage units and piping systems are characterized by high level of seismic risk [2].…”