Abstract: In order to improve the plant operators to monitor display the visual search performance of information, taking the warning lines in the interface as the research object, the way to highlight information as variables, experiment 1 studied the pop-up window to the lee of the warning line problem, test 2 studied nuclear power warning line highlights the different ways and warning lines show the location of the influence of different of user's visual search performance. The test results show that when the popover transparency is set to 35%, the warning information under the popover can be captured effectively. When the transparency of the pop-up window is reduced, the search performance of the information on the pop-up window will not be reduced if the information on the pop-up window is highlighted by a red frame. The warning lines in the original interface were highlighted with a single red color, and the search efficiency and accuracy of the subjects decreased significantly with the increase of the complexity of the lines. Using hierarchical lightness coding for warning lines can significantly improve visual search performance. Highlighting and optimizing warning lines in the monitoring interface of nuclear power plant can effectively improve operator visual search performance.

Key words: nuclear power plant, monitor display interface, warning line, information highlighting, brightness coding, popover transparency