Contributions to the Risk Evaluation of a High-Level Waste Solidification Plant

An analysis has been made dealing with the evaluation of risk of a high-level waste solidification plant. Fault-tree methodology was used to identify all possible accidents and to evaluate their probability of occurrence. The analysis shows that with regard to risk, the most important accidents occur during off-gas cleaning. Furthermore, the routine risk is of the same order of magnitude or greater than the most important accident risks.