Impact of calcium ions on the oxidative dissolution of UO2-based surrogats for spent nuclear fuel
Source abstract
Abstract
This study investigates the impact of calcium ions on the dissolution behavior of UO 2 based surrogates for spent nuclear fuel (SNF) in granite-type repositories. The prevalence of calcium ions as one of the main components in groundwater raises questions about their influence on the stability of SNF. Leaching experiments were conducted using pure UO 2 and UO 2 containing fission product noble metal particles under various conditions. Electrochemical analysis and surface characterization complemented the experiments. The results indicate that Ca 2+ accelerates the oxidative dissolution process of the UO 2 matrix in simulated groundwater. Additionally, the establishment of a micro corrosion cell between the UO 2 matrix and simulated fission product alloy particles further enhances the oxidative dissolution of UO 2 in groundwater with or without presence of Ca 2+. This research contributes to a better understanding of SNF environmental behavior.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Radioactive element chemistry and processing · Nuclear Materials and Properties · Nuclear reactor physics and engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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