The design, operation, safety and decommissioning of research reactors involves complex processes that can be understood and improved through numerical analysis and benchmarking. This publication provides the final consolidated results of an IAEA coordinated research project (CRP). It comprises the benchmark studies, details of the calculations in the annexes and individual reports of the CRP participants in the on-line supplementary files. This publication is intended for operating organizations, researchers, regulatory bodies, reactor designers, technical support organizations and other parties interested in benchmarking the computer codes and models they use for research reactor operation and safety analysis.