This publication provides the operating experience feedback from the events reported to the IAEA's incident reporting system for research reactors (IRSRR) since its launch in 1997. The publication has a focus on the root causes, lessons learned, and corrective actions taken to prevent the occurrence of similar events. It also analyses the key lessons learned from recent events in nuclear power plants that are relevant to research reactors. Reference to other publications that cover research reactor events as well as a description of an operating experience programme are also included. This publication is intended to be used by research reactor operating organizations, regulatory bodies, and designers.