Due to the delays worldwide in the development and starting up of fast breeder reactors (which require large amounts of plutonium at startup) and the ongoing reprocessing of spent fuel (which produces separated plutonium), significant quantities of separated plutonium are being created. An Advisory Group meeting was held in April 1993 to consider this situation. The meeting had two primary objectives: to determine the magnitude of the plutonium accumulations and to identify potential problems related to this accumulation of separated plutonium. In this document IAEA estimates of present and projected inventories of separated plutonium are presented and discussed. Document also contains presentations from representatives of Member States on national programmes for production and utilization of separated plutonium. Refs, figs and tabs.