In comparison to 3d or 4 f metals, magnetism in actinides remains poorly understood due to experimental complications and the exotic behavior of the 5 f states. In particular, plutonium metal is most especially vexing. Over the last five decades theories proposed the presence of either ordered or disordered local moments at low temperatures. However, experiments such as magnetic susceptibility,...

Pebble bed reactors fuel elements are specially suited for withstanding very high burn-up values. This is one of the main characteristics of a transmutation fuel. The higher the burn-up achieved in the fuel, the smaller the number of reprocessing steps needed for obtaining a high transmutation rate. In this paper, a new transmutation cycle option will be introduced, based in a single pass of th...

The speciation of hexavalent U and tetravalent Pu will be examined in the TBP-dodecanenitric acid systems. This topic is chosen based on data needs for separation modeling identified by the AFCI. Emphasis will be placed on studying the influence of nitrate and acetohydroxamic acid on U and Pu speciation as well as conditions where a third phase forms in the organic phase. The organic phase will...

In the present review, works on classes of chelating extractants for metals, compounds with several amide and carboxyl groups, azomethines, oximes, macrocyclic (crown ethers calixarenes), phenanthroline derivatives, others are systematized. This review focuses efficiency selectivity in recovery metals from industrial wastewater, soil, spent raw materials, separation metal mixtures. As a result ...

This article explores the possibilities and conditions of combustion in a pressurized water reactor its own accumulated minor actinides (MA). The simplest computational model is used: an infinitely extended medium with distribution composition all materials fuel assembly core, similar to VVER-1200, uranium dioxide having initial 235 U enrichment 4.95%. burnup presented form iterations, each whi...

Transmutation of spent nuclear fuels is globally being considered to reduce their radioactivity through capture and decay of minor actinides and fission products. Such reduction in radioactivity may enable their disposal in potential repositories for shorter durations. The target structural materials used in transmutation may undergo plastic deformation. A candidate target structural material, ...