This publication focuses on the treatment of radioactive gaseous waste streams arising from the operations in fuel fabrication facilities, nuclear power plants, fuel reprocessing facilities and waste processing facilities. It provides the user with an overview of the requirements for the management of radioactive gaseous waste, information on the need to characterize waste streams, considerations for the selection of treatment technology, as well as discussions on the available technologies for gaseous emission control. Although the publication does not present specific design solutions to off-gas treatment issues as each application is unique, it aims to provide a firm basis upon which the design engineer can develop a solution tailored to his/her application, design requirements, and regulatory drivers.