This publication covers the Coordinated Research Project (CRP) on Long Term Behaviour of Low and Intermediate Level Waste Packages Under Repository Conditions. This CRP was intended to promote research activities on the subject area in Member States, share information on the topic among the participating countries, and contribute to advancing technologies for near surface disposal of radioactive waste. It provides an overview of scientific and technical issues related to the behaviour and performance of a wide range of low and intermediate level waste. This publication provides an overview of scientific and technical issues related to the behaviour and performance of a wide range of low and intermediate level waste packages in the context of overall repository performance and safety. Specific approaches for the testing and assessment of waste package components, including modelling considerations in predicting waste package performance, are presented and discussed. In addition, the major findings of the research projects are presented, summarizing the variety of approaches and technologies used in waste package development, testing and evaluation.
