| Budget Amount *help |
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1996: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1995: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Research Abstract |
Although many research activities can be found aiming at developing operator support system for nuclear power plant operators for achieving higher level of safety, a support information presentation methods dynamically adaptable to a purpose and a situation has not yet been developed. The present study aims at developing basic interface technology for supporting cooperative problem solving process among plant crews. First, a concept of Cognitive Diversity has been proposed as the principle of effective crew cooperation based on the insight obtained in our previous studies. As the operators of nuclear power plant are in general well-experienced experts with higher level of education, they require a support only when they face the un-experienced, un-expected confused situation, when the support of conventional expert system is no longer effective. During such complex situations, the stress level of operators become higher, which results in attention narrowing and sticking to specific hyp
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othesis. The phenomenon, called mind set problem', is important issue to be solved. The concept of Congnitive Diversity is expected to provide effective methodology for solving above problems. The following issues have been investigated ;
A.Multi-attribute description with different level of abstraction.
(Generalized function, physical function, objective function)
B.Structurized-Integrated presentation of relevant data
(P&ID chart, previous history, maintenance history)
C.Providing diverse viewpoints and overall decision support
The experimental evaluation methods have also been developed for these issues. Especially as for issue B,the following concepts have been proposed and experimentally evaluated by the prototype system using nuclear power plant simulator ;
D.Process Overview Display for displaying important process variables systematically along with the corresponding plant P&ID chart.
E.Structurized Functional Display for presenting the dynamic behavior of major components by depicting the trace route in the state space. In addition, as one of the method for providing support information at anytime, the diagnosis method based on Memory Based Reasoning (MBR) has also been developed. Less
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