Fabrication and characterization of americium, neptunium and curium bearing MOX fuels obtained by powder metallurgy process

In situ characterization of uranium and americium oxide solid solution formation for CRMP process: first combination of in situ XRD and XANES measurements

“…The latter are based on powder metallurgy processes with ball-milling steps which generate large amounts of fine (sub-micronic) and highly contaminant radioactive particles. [5][6][7][8] Dustless processes are thus mandatory before planning large-scale deployment. 9 Aiming at the construction of dedicated facilities to supply reactor needs, such as ASTRID, the development of an innovative route using micronic spherical precursors is studied.…”

Application of the UMACS process to highly dense U1−xAmxO2±δ MABB fuel fabrication for the DIAMINO irradiation

“…Two recycling modes are considered. In the case of homogeneous recycling, MA are added up to 5 at.% of heavy metals in MOX fuels which constitute the entirety of the core [2]. For the heterogeneous mode, which is at present the main focus of research, MA are integrated in specific fuels known as Minor Actinide Bearing Blankets (MABB), because of their peripheral arrangement in the core [3].…”

Alpha self-irradiation effect on the local structure of the U0.85Am0.15O2±x solid solution

“…Two transmutation options are currently investigated: homogeneous and heterogeneous mode. Contrary to the homogeneous mode in which MA are added in small amount (a few at%) to conventional fuels [1], the heterogeneous one consists to add MA in higher amounts (o30%) in dedicated assemblies located in the reactor periphery. The fabrication of MA bearing materials is therefore of great interest to achieve an efficient transmutation.…”