In this report, in continuity with the activities carried out in the three-year RDS 2019-2021, analyses have been carried out on the seismic and geological forces that affect the national territory and that can therefore lead to criticalities at the national Electro-Energy System (SEE), in terms of malfunctions and interruptions in the supply of energy to users.

Compared to previous assessments, the analyses were addressed not only to the Italian National Transmission Grid (RTN) (cabins and pylons), but also to energy infrastructures, with reference to large Italian dams, wind turbines and photovoltaic fields. For these structures and infrastructures, interference with basic geological hazards defined by national mapping (seismic, hydraulic, landslide, tsunami) were analyzed.

With a view to further analysis in subsequent years, with particular reference to seismic hazards, methods from scientific literature were identified and analyzed to study, from a modeling point of view, the seismic hazard of a pilot area, identified in the Campania region, with the aim of performing 3D numerical simulations of ground shaking caused by earthquakes. Among those analyzed, the discontinuous Galerkin spectral element numerical method, implemented in the SPEED code, was found to be suitable for the applications and purposes of the research activity.

Also for landslides, with a view to further investigate this aspect on the area chosen as the “pilot case” for the analyses that will follow, a first approach for the evaluation of landslide spatial susceptibility was developed.

The objective is to arrive, at the end of the three-year period, at the definition of a workflow that brings together best practices and guidelines derived from the two types of analysis, seismic and landslide. And to replicate it, with the appropriate comparisons and associations, at the national scale for areas where the strategic infrastructure of SEE insists.
The analyses are carried out with the aim of providing useful tools for the purposes of risk mitigation, increasing the resilience of the national SEE and for planning, in an appropriate manner, any preventive and protective interventions.