This publication presents an evaluation of the state of the art, trends and current issues in the decommissioning of research reactors. The report reviews, from a historical perspective, decommissioning projects completed in recent years or under way, and assesses progress as well as open and new issues. Its aim is to facilitate timely, safe and efficient completion of decommissioning projects for research reactors by highlighting technologies and planning or management methodologies, and suggesting ways to overcome expected issues. The report includes a CD-ROM providing details of several hundred research reactor decommissioning projects.