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Yoshikazu Umeda

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Publications by Yoshikazu Umeda (bibliography)

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1995
 
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Umeda, Yoshikazu and Inujima, Hiroshi (1995): Development of Abnormal Signal Separation Method in Nuclear Power Plant. In: Proceedings of the Sixth International Conference on Human-Computer Interaction July 9-14, 1995, Tokyo, Japan. pp. 1057-1062.

In an nuclear power plant various data are periodically collected from the installed sensors. These data are used as criteria for the safety confirmation of the plant and the replacement of machines. However, in actual practice these data are operated by the standard based on the threshold values given in the "Operation Manual," etc. On the other hand, when noise gets mixed up with these data, the control value for plant operation apparently gets increased, and is likely to cause misjudgement. Moreover, the increase in control value for operation may be giving some information regarding the plant. It has long been considered that it is possible to obtain some new information about the plant; the information not included in the "Operation Manual" by putting these collected and stored data to appropriate analysis. This information refers to the deterioration, change in condition, etc. of the machine, and is expected to contribute to higher maintenance support. However, expert as the data controller of an atomic power plant may be regarding the "Operation Manual," he is not a specialist of data analysis, so that the enormous amount of data are left almost unanalyzed. Under such background, research has been made to upgrade the maintenance support level of the atomic power plant. This report describes the concept of "maintenance support high-grade expert system," on the basis of the data analysis made by using a computer, and deals with the results obtained through application of the examples after trial-manufacture of the prototype.

© All rights reserved Umeda and Inujima and/or Elsevier Science

 
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