4SIGHT Manual: A Computer Program for Modelling Degradation of Underground LowLevel Waste Concrete Vaults

摘要

A computer program has been written to facilitate performance assessment ofconcrete vaults used in Low Level Waste (LLW) disposal facilities. The computer program is a numerical computer model of degradation in concrete. A one-dimensional finite different equation is used to propagate ions by precipitation/dissolution of available salts. The precipitation/dissolution of salts, in turn, changes the transport properties, which changes the rate of ion transport. The result is a model which incorporates the synergism of multiple degradation mechanisms.