Recent major natural disasters highlighted the emergence of a new type of risk that manifests itself when the natural and technological worlds collide. The impact of a natural disaster on a facility storing or processing dangerous substances can result in the release of hazardous materials with possibly severe off-site consequences through toxic-release, fire or explosion scenarios. EU regulation, namely Directive 2012/18/EU, among its new elements explicitly requires the analysis of NaTech (natural hazard triggering technological disasters) hazards. Main issue related to NaTech accidents is the simultaneous occurrence of a natural disaster and a technological accident, both of which require simultaneous response efforts in a situation in which lifelines needed for disaster mitigation are likely to be unavailable. In addition, hazardous-materials releases may be triggered from single or multiple sources in one installation or at the same time from several hazardous installations in the natural disaster's impact area, requiring emergency-management resources occupied with responding to the natural disaster to be diverted. In this paper it is proposed and evaluated the application of multi-rotor systems for NaTech accident emergency management. The drone should be equipped with visible and near-infrared sensors, a thermal camera and dedicated sensors for the sensing and monitoring of dangerous substances. The multi-rotor systems allow stationary flight inside the industrial plants avoiding the presence of a human operator near hazardous-materials release source. The WiFi connection allows real time data processing and management of the situation. This methodology represent an effective approach to NaTech disasters management and consequences evaluation.
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