Geosphere Performance Indices: Comparative measures for site selection and safety assesment of deep waste repositories

The concept of Geosphere Perfonnance Indices (GPis) is proposed. The &quot;performance&quot;<br/>refers to the geosphere&#39;s capacity to retain/contain radionuclides in the event of their accidental<br/>release at some point in time. The GPis are based on the Lagrangian stochastic-analytical<br/>framework for transport in the subsurface and are believed to render useful tools in performance<br/>assessment studies in general and in the site selection process in particular. A few<br/>advantages of the GPis are: their transparency, low computational and the fact that additional<br/>data in a site selection programme can be incorporated in an iterative manner. lllustration<br/>examples indicate that the probability of the GPis depends strongly on the dimensionless system<br/>parameters eB, aB and dB112T-1• It is proposed that the derived framework is further<br/>elaborated and applied for realistic geosphere cases.