In this paper, we describe the architecture and functionality of IRISPortal, a semantic portal that allows the management of industrial risk cases by exploiting state-of-the-art semantic technologies, such as the OWL 2 language and the OWLIM semantic repository. The portal allows the web-based management of risk cases that are modeled in terms of a risk ontology, assisting the domain experts to perform administrative tasks, such as adding, deleting and updating risk cases. Furthermore, the portal provides the functionality to the end-users for searching and browsing the modeled risk cases and their corresponding characteristics, based on the semantic relationships that derive from the ontology model after the reasoning procedure.