Over the course of their operational life, a variety of components in both nuclear power plants and other civilian nuclear facilities will become contaminated by irradiation from the radioactive sources present. Once these power plants or facilities have come to the end of their operational lifetime, the need to decommission and decontaminate them arises. This book critically reviews the decommissioning and decontamination processes and technologies available for rehabilitating sites used for nuclear power generation and civilian nuclear facilities, from fundamental issues and best practices, to procedures and technology, and on to decommissioning and decontamination case studies.