Use of expert judgment in NUREG-1150☆
1991
Abstract The explicit expert judgment process used in NUREG-1150, “Severe Accident Risks: An Assessment for Five US Nuclear Plants”, is discussed in this paper. The main steps of the process are described, including selection of issues and experts, elicitation training, presentation of issues to the experts, preparation of issue analyses by the experts, discussion of issue analyses and elicitation, and recomposition and aggregation of results. To demonstrate the application of the expert judgment process to NUREG-1150, two issues are summarized: one from the accident frequency analysis, and one from the accident progression analysis. Recommendations and insights are provided to improve the use of explicit expert judgment in complex technical issues.
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