The effect of Y2O3 on the dynamics of oxidative dissolution of UO2

Trummer, Martin; Dahlgren, Björn

doi:10.1016/j.jnucmat.2010.10.014

Cited by 22 publications

(17 citation statements)

References 42 publications

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“…Hence, there is a considerable difference in the oxidative dissolution yield. The same trend was observed when comparing pure UO 2 pellets and UO 2 pellets doped with Y 2 O 3 [24]. Obviously, doping alters the ratio between the rate constant for oxidation of UO 2 and the rate constant for catalytic decomposition of H 2 O 2 .…”

Section: Introductionsupporting

confidence: 71%

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On the redox reactivity of doped UO2 pellets – Influence of dopants on the H2O2 decomposition mechanism

Pehrman

Trummer

Lousada

et al. 2012

Journal of Nuclear Materials

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Section: Introductionsupporting

confidence: 71%

“…It has also been shown that the oxidation of UO 2 is catalyzed by Pd inclusions [25]. Redox experiments using UO 2 doped with Y 2 O 3 and Pd particles show that the rate of uranium dissolution is significantly reduced [24].…”

Section: Introductionmentioning

confidence: 99%

On the redox reactivity of doped UO2 pellets – Influence of dopants on the H2O2 decomposition mechanism

Pehrman

Trummer

Lousada

et al. 2012

Journal of Nuclear Materials

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“…However, the rate of uranium release from the pellets differs considerably. For the pellets doped with rare earth oxides (including SIMFUEL), the rate of uranium release is considerably lower than that of the pure UO 2 pellets [61][62][63][64]. As previously mentioned, H 2 O 2 can react in two different ways on an oxide surface.…”

Section: Kinetics Of Surface Reactionsmentioning

confidence: 97%

“…UO 2 doped with α-emitting nuclides [51][52][53][54][55][56][57][58] has been used to mimic the radiation field from spent nuclear fuel older than 1000 years. UO 2 has been doped with Pd particles [59,60] to mimic the effect of ε-phase particles (fission products forming noble metal inclusions in the fuel matrix) and with rare earth oxides [61][62][63] to mimic the effect of fission products forming oxides in the fuel matrix. SIMFUEL is a more complex material produced to mimic some of the chemical properties of spent nuclear fuel.…”

Section: Kinetics Of Surface Reactionsmentioning

confidence: 99%

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Radiation Effects on Materials Used in Geological Repositories for Spent Nuclear Fuel

Jönsson

2012

ISRN Materials Science

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Safe long-term storage of radioactive waste from nuclear power plants is one of the main concerns for the nuclear industry as well as for governments in countries relying on electricity produced by nuclear power. A repository for spent nuclear fuel must be safe for extremely long time periods (at least 100 000 years). In order to ascertain the long-term safety of a repository, extensive safety analysis must be performed. One of the critical issues in a safety analysis is the long-term integrity of the barrier materials used in the repository. Ionizing radiation from the spent nuclear constitutes one of the many parameters that need to be accounted for. In this paper, the effects of ionizing radiation on the integrity of different materials used in a granitic deep geological repository for spent nuclear fuel designed according to the Swedish KBS-3 model are discussed. The discussion is primarily focused on radiationinduced processes at the interface between groundwater and solid materials. The materials that are discussed are the spent nuclear fuel (based on UO 2 ), the copper-covered iron canister, and bentonite clay. The latter two constitute the engineered barriers of the repository.

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An Overview of Interfacial Radiation Chemistry in Nuclear Technology

Jönsson

2014

Israel Journal of Chemistry

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Interfacial radiation chemistry is of key importance in nuclear technology because most materials in the vicinity of radioactive materials in nuclear power plants, reprocessing plants, and repositories for nuclear waste are exposed to ionizing radiation. Corrosion is a crucial issue for the long‐term performance and safety of these installations. Nevertheless, this field is still fairly undeveloped. In this paper, the current state of the art with particular focus on reactions between aqueous radiolysis products and metal or metal oxide surfaces is discussed. The general reactivity of hydrogen peroxide and the hydroxyl radical towards oxide surfaces is discussed on the basis of recent experimental results and DFT calculations. More specific discussions on radiation‐induced surface processes in a future geological repository for spent nuclear fuel are given as relevant examples. This includes radiation‐induced dissolution of spent nuclear fuel in contact with groundwater, radiation‐induced corrosion of copper, and radiation‐induced alterations of bentonite clay. Current knowledge gaps in these areas are highlighted.

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The effect of Y2O3 on the dynamics of oxidative dissolution of UO2

Cited by 22 publications

References 42 publications

On the redox reactivity of doped UO2 pellets – Influence of dopants on the H2O2 decomposition mechanism

On the redox reactivity of doped UO2 pellets – Influence of dopants on the H2O2 decomposition mechanism

Radiation Effects on Materials Used in Geological Repositories for Spent Nuclear Fuel

An Overview of Interfacial Radiation Chemistry in Nuclear Technology

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