A study of uranium adsorption to single-crystal tungsten

Abstract

In this study we explore the adsorption of uranium to the (110) plane of tungsten. Potential functions were constructed to describe the interaction of adsorbed uranium atoms with the tungsten surface and the lateral interaction between adsorbed uranium atoms. Next, the behavior of the uranium adlayer under different conditions was studied through a Monte Carlo simulation of the grand canonical Hamiltonian in an off-lattice model. Our results are consistent with available studies in the literature. The simulation results indicate that the temperature and dipole-dipole interactions play an important role in governing the adsorption process. Introduction:Nuclear power is a key energy alternative for efficient generation of electricity. However, an essential factor in nuclear power is the safe management of spent fuel. Electrochemical reprocessing (or Pyroprocessing) of used nuclear fuel is a promising technology that has been extensively studied (e.g [1][2][3][4]). This process allows for the selective recovery of actinides from used fuels. The process has many advantages such as compactness of process equipment and the potential of the development of the integrated irradiation-reprocessing facility which can significantly reduce the costly and complicated transport of nuclear materials [5].

Electrochemical Properties and Nucleation Morphology of Yttrium on Tungsten Substrate in Molten Salt

“…It is found that in the high temperature molten salt system, a severe adsorption behavior was found on the electrode surface accompanied with a metal electrochemical reduction process, which highly affected the potential and current response. [34][35][36] Recent works 3,31 attempted to explain this discrepancy, they found that even though the S-H mode suggests a 3D nuclei formation, the SEM images of initial nuclei morphology presents a 2D growth. Similar phenomenon is also observed in our work which will be discussed in the next section.…”

“…As a result, they obtained high-quality SEM images for initial nuclei formation and growth of several lanthanides elements in molten salt electrolysis. 3,[31][32][33][34][35][36][37] However, due to the thick size and complex shielding of the Mo cylinder electrode, we need to design a special sample stage for the electron microscope. It is inconvenient in the process of sample preparation for SEM analysis.…”

MIL-101(Cr) metal–organic framework functionalized with tetraethylenepentamine for potential removal of Uranium (VI) from waste water

“…A number of studies have indicated that bacteria, fungi, algae, polymeric resins, activated carbon, clay, zeolites, silica gel, and inorganic adsorption materials have certain enrichment effects on uranium or heavy metal ions (Liu and Zhou, 2010;Naushad et al, 2016Naushad et al, , 2017Samin et al, 2015;Sharma et al, 2017aSharma et al, , 2017bZou et al, 2010). Therefore, the achievement of high adsorption capacity, and good selectivity will be the focus of the research.…”