A5040643081- Radioactive element chemistry and processing
- Chemical and Physical Properties in Aqueous Solutions
- Soil and Unsaturated Flow
- Radioactive contamination and transfer
- Nuclear Materials and Properties
- Chemical Thermodynamics and Molecular Structure
- Thermal and Kinetic Analysis
- Nuclear and radioactivity studies
- Lanthanide and Transition Metal Complexes
- Spacecraft and Cryogenic Technologies
- Groundwater flow and contamination studies
- Concrete and Cement Materials Research
- Graphite, nuclear technology, radiation studies
- Nuclear materials and radiation effects
- Ocean Acidification Effects and Responses
- Mineral Processing and Grinding
- Calibration and Measurement Techniques
- Magnetic confinement fusion research
- Mine drainage and remediation techniques
- Soil Moisture and Remote Sensing
- Extraction and Separation Processes
- Radioactivity and Radon Measurements
- Chemical Synthesis and Characterization
- Nuclear Engineering Thermal-Hydraulics
- Rare-earth and actinide compounds
Paul Scherrer Institute
1999-2024
Waste Management (United States)
2022-2023
Summary The Nagra/PSI Chemical Thermodynamic Data Base has been updated to support performance assessments of the planned Swiss repositories for radioactive waste. update from version 05/92 01/01 involved major revisions most actinides and fission products. Altogether, more than 70% database contents have revised. U, Np, Pu, Am Tc recommended by NEA TDB project were considered in update. data Th, Sn, Eu, Pd, Al, solubility metal complexation sulphides silicates extensively reviewed. Zr, Ni...
Most of the available thermodynamic data concerning radioactive waste disposal are restricted to values reaction equilibrium constants (logK298°) at 25 °C and 1 bar. Simple estimation methods such as isocoulombic reactions can be used for extrapolating properties involving aqueous species minerals elevated temperatures. The aim this study was validate applicability various alternative estimate logKT° complexation lanthanides actinides temperatures while taking advantage new additional...
Solubility limitation of radionuclides by solid phases in aqueous environments is a key factor performance assessment radioactive waste repositories. Although the modeling solubility limits standard procedure, results are often questionable because basic data used either irrelevant, inaccurate, or incomplete. This illustrated discussing potential Ni sulfidic groundwaters, which some importance to planned low- and intermediate-level repository at Wellenberg, Switzerland. Calculated for may be...
Abstract The Nagra/PSI Chemical Thermodynamic Data Base is a critical selection of thermodynamic data used to support performance assessments for planned radioactive waste repositories in Switzerland. For this purpose, the base focused on actinides and fission products, but also includes additional major elements occurring common groundwaters. Recently, peer-reviewed update was carried out (from version 05/92 01/01) involving revisions most products. Altogether, more than 70% contents have...