Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 4, 2020
Previous Article Next Article

On the change in UO2 redox reactivity as a function of H2O2 exposure

Author affiliations

Abstract

To assess the long-term leaching behaviour of UO2, the main constituent of spent nuclear fuel, the oxidative dissolution of UO2 pellets was studied at high H2O2 exposures ranging from 0.33 mol m−2 to 1.36 mol m−2. The experiments were performed in aqueous media containing 10 mM HCO3 where the pellets were exposed to H2O2 three consecutive times. The results indicate that the dissolution yield (amount of dissolved uranium per consumed H2O2) at high H2O2 exposures is significantly lower compared to previous studies of both pellets and powders and decreases for each H2O2 addition for a given pellet. This implies a change in redox reactivity, which is attributed to irreversible alteration of the pellet surface. Surface characterization after the exposure to H2O2, by SEM, XRD and Raman spectroscopy shows, that the surface of all pellets is significantly oxidized.

Graphical abstract: On the change in UO2 redox reactivity as a function of H2O2 exposure

Back to tab navigation

Supplementary files

Article information


Submitted
13 Nov 2019
Accepted
17 Dec 2019
First published
18 Dec 2019

This article is Open Access

Dalton Trans., 2020,49, 1241-1248
Article type
Paper

On the change in UO2 redox reactivity as a function of H2O2 exposure

A. C. Maier, P. Kegler, M. Klinkenberg, A. Baena, S. Finkeldei, F. Brandt and M. Jonsson, Dalton Trans., 2020, 49, 1241
DOI: 10.1039/C9DT04395K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements