Minor actinides transmutation scenario studies with PWRs, FRs and moderated targets

In this study it is demonstrated that it is theoretically possible to obtain different minor actinide transmutation scenarios with a significant gain on the waste radio-toxicity inventory using current technologies. The handling of materials containing Am + Cm entails a significant increase of penetrating radiation sources (neutron and 7) whatever mixed reactor scenario is envisioned: The PWR and fast reactor scenario involving the recycling of Am + Cm in the form of targets results in the lowest mass flow. In the light of these outcomes, the detailed studies has allowed to: Design a target sub-assembly with a high fission rate (90%). Define a reprocessing scheme for the plant head and the minor actinide separation processes (PUREX, DIAMEX and SANEX). Some technological difficulties appear in manipulating curium, principally in manufacturing, where the wet process ( sol-gel) is not well suited for (Am + Cm). (C) 2003 Elsevier Science B.V. All rights reserved.