SENSITIVITY OF THE RADIONUCLIDE RELEASE FROM A REPOSITORY TO THE VARIABILITY OF MATERIALS AND OTHER PROPERTIES

Radionuclides leaking from a damaged canister spread into the clay sur rounding the canister and then migrate through various pathways into t he mobile water in the rock fractures. To quantify uncertainties regar ding the release to the far field, a sensitivity analysis is performed for variations in the parameters governing the release. Variations in the size of the damage in the canister, uranium solubility, sorption capacity of the clay, and hydraulic properties of the fractured rock n earest to the canister have to be accurately determined in order to mi nimize uncertainties in the release.