Natural Radionuclide Fluxes and their Contribution to Defining Licensing Criteria for Deep Geological Repositories for Radioactive Wastes

Artikel in diesem Heft

1. Masthead
2. Contents
3. A Chemistry of Actinides and Fission Products in Natural Aquatic Systems
4. A. 1. Solubilities and Dissolution Reactions
5. Solubility and Speciation of (UO₂)₂SiO₄ · 2H₂O in Aqueous Systems
6. Solubility and Oxidation State of Uranium under Anoxic Conditions (N₂ Atmosphere)
7. Solubility of Neptunium(IV) Hydrous Oxide in Aqueous Solutions
8. Solid-Liquid Phase Equilibria of Np(VI) and of U(VI) under Controlled CO₂ Partial Pressures
9. The Experimental Determination of the Solubility Product for NpO₂OH in NaCl Solutions
10. Neptunium(Y) and Neptunium(VI) Solubilities in Synthetic Brines of Interest to the Waste Isolation Pilot Plant (WIPP)
11. Thermochemistry of Selected Lanthanide and Actinide Hydroxycarbonates and Carbonates
12. The Effect of Silica and Phosphate on the Transformation of Schoepite to Becquerelite and Other Uranyl Phases
13. Coprecipitation of Mono-, Di-, Tri-, Tetra- and Hexavalent Ions with Na-Polyuranates
14. Uranium Dioxide Leaching Mechanism in a Synthetic Granitic Groundwater in Oxic Conditions in Function of S/V Ratio at 96 °C
15. The Release of Uranium, Plutonium, Cesium, Strontium, Technetium and Iodine from Spent Fuel under Unsaturated Conditions
16. A. 2. Complexation with Inorganic and Organic Ligands
17. Complexation in the System UO²⁺₂/PO^3-₄/OH (aq): Potentiometric and Spectroscopic Investigations at very Low Ionic Strengths
18. Direct Spectroscopic Speciation of Uranium(VI) in Carbonate Solutions
19. Speciation of Uranium in Seepage Waters of a Mine Tailing Pile Studied by Time-Resolved Laser-Induced Fluorescence Spectroscopy (TRLFS)
20. Spectrophotometric Study of the Dissociation of the Pu(IV) Carbonate Limiting Complex
21. Thermodynamics of Curium(III) in Concentrated Electrolyte Solutions : Formation of Sulfate Complexes in NaCl/Na₂SO₄ Solutions
22. Complexation of Am(III) by Oxalate in NaClO₄ Media
23. Thermodynamic Modeling of Neptunium(V)-Acetate Complexation in Concentrated NaCl Media
24. Complexation Study of NpO⁺₂ and UO²⁺₂ Ions with Several Organic Ligands in Aqueous Solutions of High Ionic Strength
25. Variation of Stability Constants of Thorium Citrate Complexes with Ionic Strength
26. Stability of Various Plutonium Valence States in the Presence of NTA and EDTA
27. A Comparison of Natural Humic Acids with Synthetic Humic Acid Model Substances : Characterization and Interaction with Uranium(VI)
28. A Study of Ternary Complexes of Cm(III) with Humic Acid and Hydroxide or Carbonate in Neutral pH Range by Time-Resolved Laser Fluorescence Spectroscopy
29. Α. 3. Redox Reactions and Colloid Formation
30. Sorption and Reduction of Uranium(VI) on Iron Corrosion Products under Reducing Saline Conditions
31. Radiolytic Compounds Formed by Dissolution of Irradiated NaCl and MgCl₂ · 6H₂O in Water
32. Studies on the Immobilization of Technetium under Near Field Geochemical Conditions
33. Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions
34. Α. 4. Experimental Methods
35. A Comparison of Sequential Extraction Techniques to Estimate Geochemical Controls on the Mobility of Fission Product, Actinide, and Heavy Metal Contaminants in Soils
36. Impedance Measurements on UO₂ in Salt Brines
37. Applications of Electrophoresis to the Study of the Complexation of Cadmium with Humic Substances Using ¹⁰⁹Cd as Radiotracer
38. Modified Diffusion Technique for Studying Nonlinear and Kinetic Sorption and Desorption Processes
39. B. Geochemical Interactions and Transport Phenomena
40. B. 1. Diffusion and Migration in Geologic Media
41. The Distribution of Transuranic Elements in Sediment Profiles from an Intertidal Area in West Cumbria, UK
42. Radioactive Contamination of Aquatic Ecosystems in the Areas of Nuclear Power Plants and Other Nuclear Facilities in Russia
43. A Comparative Study of the Speciation and Behaviour of Plutonium in the Marine Environment of Two Reprocessing Plants
44. Characterization of Rock Matrix Structure Using Microscopy and ¹⁴C-PMMA Method for the Study of Retardation Mechanisms in Granite
45. Β. 2. Sorption/Desorption Phenomena
46. Characterization of Hydrous Uranyl Silicate by EXAFS
47. Sorption of Iodine and Cesium on Some Mineral Oxide Colloids
48. Studies on the Interaction of Radionuclides with Organophilic Clays
49. Sorption of Uranium(VI) on Rock Material of a Mine Tailing Pile : Solution Speciation by Fluorescence Spectroscopy
50. Uranium Adsorption on Ferrihydrite - Effects of Phosphate and Humic Acid
51. Sorption of Europium(III)-Humate Complexes onto a Sandy Soil
52. A Kinetic Study of Cation Release from a Mixed Mineral Assemblage : Implications for Determination of Uranium Uptake
53. Perspectives for the Study of the Diffusion of Radionuclides into Minerals Using the Nuclear Microprobe Techniques
54. On the Incorrect Derivation and Use of In-situ Retardation Factors from Natural Isotope Profiles By I.
55. Β. 3. Natural Analogue Studies
56. Clays at the Natural Nuclear Reactor at Bangombé, Gabon: Migration of Actinides
57. Occurrence of Pu and Fissiogenic REE in Hydrothermal Apatites from the Fossil Nuclear Reactor 16 at Oklo (Gabon)
58. Characterization of Near- to Far-Field Ancient Migrations around Oklo Reaction Zones (Gabon) Using Minerals as Geochemical Tracers
59. Natural Radionuclide Fluxes and their Contribution to Defining Licensing Criteria for Deep Geological Repositories for Radioactive Wastes
60. On the Role of α-Recoil in Uranium Migration - Some Findings from the Palmottu Natural Analogue Site, SW Finland
61. Geochemistry of the Cigar Lake Uranium Deposit: XPS Studies
62. Naturally-Occurring Zirconolites - Analogues for the Long-Term Encapsulation of Actinides in Synroc
63. Β. 4. Effects of Biological Activities and Organic Materials
64. Influence of Organic Degradation Products on the Solubilisation of Radionuclides in Intermediate and Low Level Radioactive Wastes
65. The Use of Geochemical Speciation Modelling to Predict the Impact of Uranium to Freshwater Biota
66. Author Index of Volume 74 (1996)