The results of calculations on risk, especially in high-risk technologies, are
often expressed in fN diagrams, which show the expected frequency f of an
event that has at least N fatalities as a function of this number of fatalities.
Figure 2 shows calculated fN curves for a number of high-risk technologies.
This, in principle, enables a comparison of risks for society as a whole.
The graph starts with events with ten or more fatalities per year. Aviation
appears highest on the curve with ten events with ten fatalities or more per
year in the US. Rail transport comes lower down the scale with one event
per two years (0.5). Lower still appear various types of transport of hazardous
materials (LPG, chlorine, LNG). Except for rail transport, the order of
the curves does not change when taking events with greater numbers of
fatalities.
The results of calculations on risk, especially in high-risk technologies, areoften expressed in fN diagrams, which show the expected frequency f of anevent that has at least N fatalities as a function of this number of fatalities.Figure 2 shows calculated fN curves for a number of high-risk technologies.This, in principle, enables a comparison of risks for society as a whole.The graph starts with events with ten or more fatalities per year. Aviationappears highest on the curve with ten events with ten fatalities or more peryear in the US. Rail transport comes lower down the scale with one eventper two years (0.5). Lower still appear various types of transport of hazardousmaterials (LPG, chlorine, LNG). Except for rail transport, the order ofthe curves does not change when taking events with greater numbers offatalities.
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