This report provides guidance on the proper planning and management for the decommissioning of research reactors and other small nuclear facilities. The information contained in the report can, to a large extent, also be applied to the decommissioning of large facilities. Contents: 1. Introduction; 2. Scope of the report; 3. Reasons for and stages of decommissioning; 4. Decommissioning planning; 5. Decommissioning management; 6. Quality assurance; 7. Waste management; 8. Decommissioning cost and financing; 9. Responsibilities and functions of parties in decommissioning; 10. Regulatory interfaces; 11. Recommendations for further work; 12. Summary; Annex: Stages of Decommissioning; Glossary.