natural catastrophes impose the largest toll in terms of human fatalities and economic consequences if only humanmade accidents are considered the energy sector is the secondlargest contributor with transportation causing about of all mortalities ec risks of severe accidents in all energy chains should not be neglected however as they have the potential to cause largescale and longterm impacts to human health to the environment and to the whole of society severe accidents also tend to have broad media coverage and to attract the attention of the population and different stakeholders