IAEA Safety Standards, Ageing Management, Research Reactors, Obsolescence, Nuclear Reactors, Nuclear Facilities, Decommissioning, Recommendations, Basic Concepts, Ageing Effects, Stages of the Lifetime, Systematic Programme, Implementation, Associated Actions, Maintenance, Periodic Testing, Inspection, Periodic Safety Review, Equipment Qualification, Design Basis, Reconstitution, Configuration Management, Continued Safe Operation, Degradation Mechanisms, Categories of Service Conditions, SSC Screening Methodology, Open Pool, Light Water, Heavy Water Moderated Research Reactors, Management System, Responsibility, Measurement, Assessment, Improvement, Ageing Processes, Defence in Depth, Ageing Management Programmes, Considerations Commissioning, Utilization and Modification, Extended Shutdown, Interfaces, Post-Service Surveillance, Operational Limits, Nuclear Security, Structures and Components, Safety Aspects