This report provides an overview of experimental facilities that can be used to address nuclear safety research issues in OECD member countries, and identifies priorities for organising international co-operative programmes centred on selected facilities. The information has been gathered and analysed by a Senior Group of Experts on Nuclear Safety Research, in the context of an ongoing initiative of the NEA Committee on the Safety of Nuclear Installations (CSNI) aimed at maintaining critical experimental infrastructure for nuclear safety studies in member countries.