Conceptual Structure of Performance Assessments for Geologic Disposal of Radioactive Waste

2017 ◽  
pp. 1503-1539
Author(s):  
Jon C. Helton ◽  
Clifford W. Hansen ◽  
Cédric J. Salaberry
Keyword(s):  
Radioactive Waste ◽  
Conceptual Structure ◽  
Performance Assessments ◽  
Geologic Disposal

Distributions of Concentration Limits for the Source Term in Performance Assessments

2004 ◽  
Vol 824 ◽  
Author(s):  
William M. Murphy ◽  
Steve Soldavini ◽  
Colin M. Gallagher
Keyword(s):  
Nuclear Waste ◽  
Source Term ◽  
Bimodal Distribution ◽  
Distribution Functions ◽  
Performance Assessments ◽  
Concentration Limit ◽  
Statistical Distributions ◽  
Radionuclide Concentration ◽  
Geologic Disposal ◽  
Concentration Limits

AbstractRadionuclide concentration limits are important parameters in performance assessments for geologic disposal of nuclear waste, but their statistical distributions are challenging to define. Thermodynamic solubilities provide an attractive theoretical constraint, but solubilities do not provide a basis for distribution functions, and concentration limits can exceed solubilities in irreversible systems. Distributions of natural concentrations are broad and do not correspond to distributions of concentration limits. Interpretations of natural nickel and lead concentrations suggest that they do not represent concentration limit distributions. Interpretation of groundwater data for dissolved calcium indicates a bimodal distribution, which hypothetically corresponds to a solubility-limited population and a population of values below the solubility limits.

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