geohydrologic unit
1geohydrologic unit — An aquifer, a confining unit or a combination of aquifers and confining units comprising a framework for a reasonably distinct geohydrologic system [22] …
2radionuclide retardation — The process or processes that cause the time required for a given radionuclide to move between two locations to be greater than the ground water travel time, because of physical and chemical interactions between the radionuclide and the… …
3Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …
