fulltext.study @t Gmail

Hydrogen catalytic effects of nanostructured alloy particles in spent fuel on radionuclide immobilization

Paper ID Volume ID Publish Year Pages File Format Full-Text
47430 46471 2010 6 PDF Available
Title
Hydrogen catalytic effects of nanostructured alloy particles in spent fuel on radionuclide immobilization
Abstract

For the first time, hydrogen catalytic effects of fission product alloy particles nondestructively extracted from spent nuclear fuel were demonstrated. The redox sensitive radionuclides at oxidized forms Se(IV), Tc(VII), U(VI), Np(V) and Pu(VI) were found to be stable in a solution saturated with a gas mixture (Ar + 10% H2 + 0.03% CO2) but rapidly immobilized in the same solution when contacted with the particles. In comparison, a synthetic alloy sample with similar elemental composition as the alloy particles generated in nuclear fuel displayed a smaller, but unequivocal catalytic effect. The smaller catalytic effect of synthetic alloy was apparently enhanced by a β-radiation source. The information obtained in this work contributes to improved understanding of the redox chemistry of radionuclides in nuclear waste geologic repository environments and, in particular, of the catalytic properties of these unique alloy particles.

Keywords
Radioactive catalyst; Nanoparticle; Hydrogen; Fission product; Nuclear waste
First Page Preview
Hydrogen catalytic effects of nanostructured alloy particles in spent fuel on radionuclide immobilization
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 94, Issues 1–2, 1 February 2010, Pages 173–178
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis