Seveso Directives and LUP: The mutual influence of natural and anthropic impacts

The Seveso accidents and the subsequent european regulations raised the attention to the land use planning around major risk installations. In the last decades, moreover, the problem of the technological accidents induced by natural disruptive events (Na-tech) acquired an increasing relevance; although several methodologies to assess this kind of risk were developed, their adoption is still not explicitly requested in the regulations, neither related to major risk installations.The Na-tech related methodologies developed so far are mainly devoted to the control of risk from the plant and equipment point of view, while they don't take into account the mutual influence of natural and anthropic impacts on a territory.This paper, thus, starting from the example of Piedmont and Turin guidelines for L.U.P., proposes some actions and a list of preventive and protective measures which could be implemented in the regulations (from supranational to local ones) to constitute a "passive protection" against the technological accidents impacts, also ensuring an increased protection for the environment.The issue of the new national guidelines related to the national implementation of Seveso III directive could open perspectives to introduce a major attention to Na-tech events, at least as far as it concerns their prevention and mitigation.