Abstract
Abstract Improvement in human reliability is of great concern in modern high technology systems. Efforts in the nuclear industry, mostly in Japan were surveyed and classified into improvement in human work situations and that in man-machine systems. In the former, human error prone situations were investigated using training simulators and from actual near-misses and incidents in real operating plants. The results have been used to improve operator training and other work situations. The objective of man-machine system improvement is to optimize the total performance of nuclear power plants such that automation and supervisory control by human operators will be designed to reduce human errors as well as to effectively utilize human ingenuity. Computerized operator support systems were surveyed based on the operators’ role in plant operational safety. The main support functions considered here are a kind of computerization of operation manuals revised after the Three Mile Island-2 accident, and mainly supports the operators’ rule-based behavior. The development of intelligent man-machine systems was then aimed at to support operators in their knowledge-based behavior to cope with unforeseen abnormal events, considering the recent advance in artificial intelligence and cognitive engineering. A case study is described.
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