Radionuclide transport in the vicinity of the repository and associated complementary cumulative distribution functions in the 1996 performance assessment for the Waste Isolation Pilot Plant

The following topics related to radionuclide transport in the vicinity of t he repository in the 1996 performance assessment for the Waste Isolation Pi lot Plant are presented: (i) mathematical description of models; (ii) uncer tainty and sensitivity analysis results arising from subjective (i.e, epist emic) uncertainty fur individual releases; (iii) construction of complement ary cumulative distribution functions (CCDFs) arising from stochastic (i.e. aleatory) uncertainty; and (iv) uncertainty and sensitivity analysis resul ts for CCDFs. The presented results indicate that no releases to the access ible environment take place due to radionuclide movement through the anhydr ite marker beds, through the Dewey Lake Red Beds or directly to the surface , and also that the releases to the Culebra Dolomite are small. Even when t he effects of uncertain analysis inputs are taken into account, the CCDFs f or release to the Culebra Dolomite fall to the left of the boundary line sp ecified in the US Environmental Protection Agency's standard for the geolog ic disposal of radioactive waste (40 CFR 191, 40 CFR 194). Published by Els evier Science Ltd.