Article
Licensed
Unlicensed
Requires Authentication
Leaching behaviour of UO2 containing α-emitting actinides
-
V.V. Rondinella
Published/Copyright:
September 25, 2009
After a few hundred years in a geologic repository, α-emissions will dominate the radiation field in and around spent nuclear fuel. In the event of a failure of the spent fuel container, the dissolution of the uranium dioxide matrix in contact with groundwater could be enhanced by α-radiolysis, which could create oxidizing conditions at the fuel surface. The radioactivity (hence the radiolysis) of the irradiated fuel available nowadays is characterized by strong β- and γ-contributions, which are not representative of aged fuel in a repository. A possible way to single out the effects of α-radiolysis on the dissolution behaviour of irradiated fuel is to study unirradiated UO2 doped with a short-lived α-emitter. UO2 containing ~0.1 and ~10 wt.% of 238PuO2 was fabricated and leached. Previous results of static (batch and sequential) leaching tests on monoliths at room temperature in demineralized water under anoxic atmosphere showed that the amounts of U released were higher in the case of UO2 containing 238Pu than in the case of undoped UO2. This work presents results of leaching experiments performed under similar conditions on materials of the same composition, but crushed to give samples with two different particle size distributions to investigate the effects of different surface areas. The U release data, normalized to the geometric surface area, showed enhanced U dissolution from α-doped UO2 also in the case of crushed materials, except for the initial release after 1 h of leaching. Under these experimental conditions, the concentration of U measured in the leachates for the two doped materials did not show a clear dependence on α-activity.
Published Online: 2009-9-25
Published in Print: 2000-9-1
© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- Preface: Migration Conference 1999
- The influence of near field hydrogen on actinide solubilities and spent fuel leaching
- Experimental determination and chemical modelling of radiolytic processes at the spent fuel/water interface
- Thermodynamic data for the solubility of tin(IV) in aqueous cementitious environments
- Leaching behaviour of UO2 containing α-emitting actinides
- Dehydration of synthetic autunite hydrates
- Aqueous dissolution kinetics of pyrochlore, zirconolite and brannerite at 25, 50, and 75 °C
- Complex formation of Np(V) with humic acid and polyacrylic acid
- Investigation of humic acid complexation behavior with uranyl ions using modified synthetic and natural humic acids
- Solution coordination chemistry of uranium in the binary UO22+-SO42- and the ternary UO22+-SO42--OH- system
- The speciation of Tc(IV) in chloride solutions
- The hydrolysis of uranium(VI) in sulfate media
- Complex formation of Eu(III) with polyacrylic acid
- Determination of Co(II) and Ni(II)-humate stability constants at high ionic strength NaCl solutions
- Analysis of Th(IV)-humate by XPS
- EXAFS structural analysis of aqueous uranium(VI) complexes with lignin degradation products
- Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Co2+-oxalate system
- Mixed Ca2+/UO22+/CO32- complex formation at different ionic strengths
- Humic colloid-borne Np migration: influence of the oxidation state
- Reduction of Pu(V) by humic acid
- Colloid-borne uranium and other heavy metals in the water of a mine drainage gallery
- Application of LIBD to the determination of the solubility product of thorium(IV)-colloids
- The Rossendorf Beam Line ROBL – a dedicated experimental station for XAFS measurements of actinides and other radionuclides
- Extended X-ray absorption fine structure and time differential perturbed angular correlation study of hafnium(IV) sorbed onto amorphous silica
- Speciation analysis on europium(III) using laser-induced breakdown spectroscopy
- The migration behavior of Np(V) in sandy soil and granite media in the presence of humic substances
- Uranium(VI) and neptunium(V) transport through fractured, hydrothermally altered concrete
- Experimental study and modeling of uranium (VI) transport through ferrous olivine rock columns
- Aqueous Pu(IV) sorption on brucite
- Surface spectroscopic studies of Cs+, and Ba2+ sorption on chlorite-illite mixed clay
- Approaches to modelling uranium(VI) adsorption on natural mineral assemblages
- Evaluation of radioactive nickel distribution coefficient by analyzing background stable nickel
- Application of electrokinetic data to test the adsorption models
- Sorption equilibrium and kinetics of NpO2+ on dispersed particles of Na-montmorillonite
- Sorption of Am(III) and Eu(III) onto γ-alumina: experiment and modelling
- Effects of humic acid on the sorption of Am(III) and Cm(III) on kaolinite
- Uranium(VI) sorption onto phyllite and selected minerals in the presence of humic acid
- The partitioning of uranium and neptunium onto hydrothermally altered concrete
- Alteration products of uraninite from the Colorado Plateau
- Fracture-filling minerals as uranium sinks and sources, a natural analogue study at Palmottu, Finland
- Spectroscopic properties of uranium(VI) minerals studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS)
- Fracture smectite as a long-term sink for natural radionuclides – indications from unusual U-series disequilibria
- The potential of subterranean microbes in facilitating actinide migration at the Grimsel Test Site and Waste Isolation Pilot Plant
- Application of gel electrophoretic techniques to the investigation of actinide-humic interactions in soils
- Applications of NAA, PIXE and XPS for the quantification and characterization of the humic substances/iodine association
- Quantitative assessment of radiocaesium bioavailability in forest soils
- Actinide partitioning to an acidic, sandy lake sediment
- Adsorption of Cs and U(VI) on soils of the Australian arid zone
- Natural and artificial radionuclides in forest and bog soils: Tracers for migration processes and soil development
- Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate
- An electrostatic approach for the prediction of actinide complexation constants with inorganic ligands-application to carbonate complexes
- Determination and uncertainties of radioelement solubility limits to be used by SKB in the SR 97’ performance assessment exercise
Articles in the same Issue
- Preface: Migration Conference 1999
- The influence of near field hydrogen on actinide solubilities and spent fuel leaching
- Experimental determination and chemical modelling of radiolytic processes at the spent fuel/water interface
- Thermodynamic data for the solubility of tin(IV) in aqueous cementitious environments
- Leaching behaviour of UO2 containing α-emitting actinides
- Dehydration of synthetic autunite hydrates
- Aqueous dissolution kinetics of pyrochlore, zirconolite and brannerite at 25, 50, and 75 °C
- Complex formation of Np(V) with humic acid and polyacrylic acid
- Investigation of humic acid complexation behavior with uranyl ions using modified synthetic and natural humic acids
- Solution coordination chemistry of uranium in the binary UO22+-SO42- and the ternary UO22+-SO42--OH- system
- The speciation of Tc(IV) in chloride solutions
- The hydrolysis of uranium(VI) in sulfate media
- Complex formation of Eu(III) with polyacrylic acid
- Determination of Co(II) and Ni(II)-humate stability constants at high ionic strength NaCl solutions
- Analysis of Th(IV)-humate by XPS
- EXAFS structural analysis of aqueous uranium(VI) complexes with lignin degradation products
- Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Co2+-oxalate system
- Mixed Ca2+/UO22+/CO32- complex formation at different ionic strengths
- Humic colloid-borne Np migration: influence of the oxidation state
- Reduction of Pu(V) by humic acid
- Colloid-borne uranium and other heavy metals in the water of a mine drainage gallery
- Application of LIBD to the determination of the solubility product of thorium(IV)-colloids
- The Rossendorf Beam Line ROBL – a dedicated experimental station for XAFS measurements of actinides and other radionuclides
- Extended X-ray absorption fine structure and time differential perturbed angular correlation study of hafnium(IV) sorbed onto amorphous silica
- Speciation analysis on europium(III) using laser-induced breakdown spectroscopy
- The migration behavior of Np(V) in sandy soil and granite media in the presence of humic substances
- Uranium(VI) and neptunium(V) transport through fractured, hydrothermally altered concrete
- Experimental study and modeling of uranium (VI) transport through ferrous olivine rock columns
- Aqueous Pu(IV) sorption on brucite
- Surface spectroscopic studies of Cs+, and Ba2+ sorption on chlorite-illite mixed clay
- Approaches to modelling uranium(VI) adsorption on natural mineral assemblages
- Evaluation of radioactive nickel distribution coefficient by analyzing background stable nickel
- Application of electrokinetic data to test the adsorption models
- Sorption equilibrium and kinetics of NpO2+ on dispersed particles of Na-montmorillonite
- Sorption of Am(III) and Eu(III) onto γ-alumina: experiment and modelling
- Effects of humic acid on the sorption of Am(III) and Cm(III) on kaolinite
- Uranium(VI) sorption onto phyllite and selected minerals in the presence of humic acid
- The partitioning of uranium and neptunium onto hydrothermally altered concrete
- Alteration products of uraninite from the Colorado Plateau
- Fracture-filling minerals as uranium sinks and sources, a natural analogue study at Palmottu, Finland
- Spectroscopic properties of uranium(VI) minerals studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS)
- Fracture smectite as a long-term sink for natural radionuclides – indications from unusual U-series disequilibria
- The potential of subterranean microbes in facilitating actinide migration at the Grimsel Test Site and Waste Isolation Pilot Plant
- Application of gel electrophoretic techniques to the investigation of actinide-humic interactions in soils
- Applications of NAA, PIXE and XPS for the quantification and characterization of the humic substances/iodine association
- Quantitative assessment of radiocaesium bioavailability in forest soils
- Actinide partitioning to an acidic, sandy lake sediment
- Adsorption of Cs and U(VI) on soils of the Australian arid zone
- Natural and artificial radionuclides in forest and bog soils: Tracers for migration processes and soil development
- Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate
- An electrostatic approach for the prediction of actinide complexation constants with inorganic ligands-application to carbonate complexes
- Determination and uncertainties of radioelement solubility limits to be used by SKB in the SR 97’ performance assessment exercise
