Case Study: Decision Making Basis and Cleanup Goals for Radionuclides at DOE Complex Sites. S. K. Siddhanti, Enviro Dynamic Group
Decision makers at EPA and DOE facilities need to be aware of the basis and context used to establish cleanup levels at other radioactively contaminated sites. The various approaches for Cleanup Goals include: Risk Assessment - Dose vs. Risk-based; ALARA; Soil Action Levels; PRGs and Screening Levels; and, other site-specific methodology. This work focusses on comparison of clean-up numbers used for predominant radionuclides at selected case-study sites to demonstrate variations in decision-making framework and basis. For purpose of this study, the selected radionuclides of concern include Plutonium, Uranium, Thorium and Radium; the selected DOE complex sites are Hanford, Rocky Flats and Oak Ridge. The study explores trends and issues that are: radionuclide-specific; approach-specific; context-specific; and, regulatory authority specific. Conclusions and recommendations are related to the issue of enhancing consistency in radiation risk assessment approaches, use of clean-up numbers and basis of decision-making for cleaning up radioactively contaminated waste sites.
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