The dynamic highlighting of interface elements, represented by flickering, significantly influences the visual cognitive performance of operators. This study focuses on the flickering animation of fault alarms in nuclear power graphical symbols, analyzing the information characteristics of flickering animations in fault alarms of nuclear power control systems. By considering variables such as flicker frequency, flicker duration, and flicker highlighting location, the study investigates the effects of these variables on attention capture effects and highlighting efficiency, employing psychological behavioral response experiments. The results indicate that the three variables are independent of each other, and flicker frequency and flicker highlighting location have a significant impact on highlighting efficiency. At a flicker frequency of 9 Hz, superior attention capture is observed compared to optimal visual search performance. Additionally, flicker highlighting tends to prioritize the middle location, followed by the upper and lower locations. This experiment provides future references and methodological insights for exploring the correlation between dynamic highlighting elements and attention capture effects.