Abstract
The effective improvement of the human working conditions in nuclear power plants might be a solution for the enhancement of the operation safety. The human reliability analysis (HRA) gives a methodological basis of the improvement based on the evaluation of human reliability under various working conditions. This study investigates some difficulties of the human reliability analysis using conventional linear models and recent fuzzy integral models, and provides some solutions to the difficulties. The following practical features of the provided methods are confirmed in comparison with the conventional methods:(1) Applicability to various types of tasks(2) Capability of evaluating complicated dependencies among working condition factors(3) A priori human reliability evaluation based on a systematic task analysis of human action processes(4) A conversion scheme to probability from indices representing human reliability.
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