Radiatio Damaae Growth Models for the Interpretation of Radiation Effects on Nuclear Waste Form Leaching

ABSTRACTTwo approaches for modeling radiation damage growth are presented and evaluated in the light of existing data. It results that purely geometric and statistical considerations about the distribution and overlap of damage are insufficient for accounting for the differences observed in leaching data from ion implantation and actinide doping experiments. It is shown, however, that the incorporation of effects such as those induced by the proximity of a free surface and the directionality of the irradiation into the kinetics of radiation damage ingrowth has the capability for accounting for the differences.