Accident trees: a framework for accident evaluation

The event tree formalism is used in a data base system for LMFBR safety-related information. The central part of this system is a quantified data base explicitly dependent upon individual event tree branch points. A formalism for including the effects of proposed experiments, test facilities or design options is developed. The output of the system is sets of data which form input for decision analyses. The feasibility of the approach is demonstrated by applying simplified data from previous studies of safety research facility informational needs, costs, and benefits. We conclude that such a system has wide application to organizing, clarifying and forming decision bases for LMFBR safety-related information