Experimental and modelling study on the long-term performance of the engineering barrier system of tru waste repository

The long-term properties of the barrier system of the TRU waste repository will be assessed using the model that analyzes the geochemical reaction and the mass transport in that system. But there are data and models whose validity isn't adequately clear yet. RWMC had started the project of laboratory scale tests, natural analogous studies and numerical model analysis to improve the reliability of that model. The result of the four years of the study made it possible to change some conservative assumption to more realistic ones, and to show longer time stabilities of the repository system. (author)