Review of the modelling of radionuclide transport from U-series disequilibria and of its use in assessing the safe disposal of nuclear waste in crystalline rock

U-series disequilibia from crystalline rocks and U deposits have been used to estimate the timing of hydrogeological events for U and Ra mobility and to model the transport rates of U and Ra,both with some sucess. Unfortunately, activity ratio data alone are not unique to a given process or model, and it is shown how inappropriate choice of the model can have quite diverse consequences for interpretation of the data. Information from other …