Evaluating Operators’ Real-Time Mental Workload with Eye Movement Analysis in Nuclear Power Plants’ Operations
Publication: Computing in Civil Engineering 2021
ABSTRACT
Nuclear power plant (NPP) operators need to have sufficient real-time cognitive ability to ensure their adherence to operational procedures and solve unexpected problems. The heavy cognitive load will degrade such ability and lead to operation errors. Previous studies show that the NPP workflows’ (a network of activities) properties, such as workflow structure types, activity types, and recurring activities, can significantly impact the operators’ cognitive load. However, which workflow properties could lead to a higher cognitive load are unclear. This study examines what workflow properties pose cognitive challenges to operators and quantitatively evaluates these properties’ impact on the operators’ cognitive load. The authors designed a simulation experiment on a nuclear reactor operation simulator called “Rancor” and recruited four students as pseudo-operators to perform reactor startup tasks. In the experiment, we collected the students’ eye movement data using a mobile eye tracker. Participants’ pupil diameter changes and eye movement types can indicate cognitive load and information searching strategies. The correlation analysis results indicate that workflow structure (i.e., sequential and parallel structures) and activity types correlate with participants’ pupil diameter changes. Such correlation indicates that parallel structure and recurring activities demand relatively high cognitive efforts. Moreover, eye movement analysis reveals that recurring activities require more fixed attention from operators. Overall, a quantitative evaluation of the relationship between workflow properties and the cognitive process advances understanding about NPP operators’ cognitive load and information searching strategies while executing different types of workflows.
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REFERENCES
Ayres, P., and Sweller, J. (2005). “The split-attention principle in multimedia learning.” The Cambridge handbook of multimedia learning, 2, 135–146.
Beatty, J., and Lucero-Wagoner, B. (2000). “The pupillary system.” Handbook of psychophysiology, 2(142–162).
Boring, R. L., Ulrich, T. A., and Lew, R. (2018). “Findings From an Operator-In-The-Loop Study on System Overview Displays in a Modernized Nuclear Power Plant.” Proceedings of the Human Factors and Ergonomics Society Annual Meeting, SAGE Publications Sage CA: Los Angeles, CA, 1658–1662.
Boring, R., Ulrich, T., Lew, R., Kovesdi, C., Rice, B., Poresky, C., Spielman, Z., and Savchenko, K. (2017). Analog, digital, or enhanced human-system interfaces? results of an operator-in-the-loop study on main control room modernization for a nuclear power plant. Idaho National Lab.(INL), Idaho Falls, ID (United States).
Braarud, P. Ø. (2020). “An efficient screening technique for acceptable mental workload based on the NASA task load Index—development and application to control room validation.” International Journal of Industrial Ergonomics, Elsevier, 76, 102904.
Carvalho, P. V. R., Dos Santos, I. L., and Vidal, M. C. R. (2006). “Safety implications of cultural and cognitive issues in nuclear power plant operation.” Applied Ergonomics, 37(2), 211–223.
Choi, M. K., Lee, S. M., Ha, J. S., and Seong, P. H. (2018). “Development of an EEG-based workload measurement method in nuclear power plants.” Annals of Nuclear Energy, Elsevier, 111, 595–607.
Dien, Y. (1998). “Safety and application of procedures, orhow dothey’have to use operating procedures in nuclear power plants?’.” Safety Science, Elsevier, 29(3), 179–187.
Endsley, M. R. (2017). “Toward a Theory of Situation Awareness in Dynamic Systems.” Situational Awareness, Routledge, 9–42.
Van Gog, T., Kester, L., Nievelstein, F., Giesbers, B., and Paas, F. (2009). “Uncovering cognitive processes: Different techniques that can contribute to cognitive load research and instruction.” Computers in Human Behavior, Elsevier, 25(2), 325–331.
Van Gog, T., and Scheiter, K. (2010). Eye tracking as a tool to study and enhance multimedia learning. Elsevier.
Hwang, S.-L., Lin, J.-T., Liang, G.-F., Yau, Y.-J., Yenn, T.-C., and Hsu, C.-C. (2008). “Application control chart concepts of designing a pre-alarm system in the nuclear power plant control room.” Nuclear Engineering and Design, Elsevier, 238(12), 3522–3527.
Jung, W., and Park, J. (2012). “Estimating the operator’s performance time of emergency procedural tasks based on a task complexity measure.” Nuclear Engineering and Technology, 44(5), 415–420.
Lallé, S., Conati, C., and Carenini, G. (2016). “Prediction of individual learning curves across information visualizations.” User Modeling and User-Adapted Interaction, Springer, 26(4), 307–345.
Lee, S. J., Kim, J., and Jang, S.-C. (2011). “Human error mode identification for NPP main control room operations using soft controls.” Journal of nuclear science and technology, Taylor & Francis, 48(6), 902–910.
Maksimenko, V. A., Hramov, A. E., Frolov, N. S., Lüttjohann, A., Nedaivozov, V. O., Grubov, V. V., Runnova, A. E., Makarov, V. V., Kurths, J., and Pisarchik, A. N. (2018). “Increasing human performance by sharing cognitive load using brain-to-brain interface.” Frontiers in neuroscience, Frontiers, 12, 949.
Martínez‐Córcoles, M., Gracia, F. J., Tomás, I., and Peiró, J. M. (2014). “Strengthening safety compliance in nuclear power operations: A role‐based approach.” Risk Analysis, Wiley Online Library, 34(7), 1257–1269.
Meißner, M., and Oll, J. (2019). “The promise of eye-tracking methodology in organizational research: A taxonomy, review, and future avenues.” Organizational Research Methods, SAGE Publications Sage CA: Los Angeles, CA, 22(2), 590–617.
Pan, X., Lin, Y., and He, C. (2017). “A review of cognitive models in human reliability analysis.” Quality and Reliability Engineering International, Wiley Online Library, 33(7), 1299–1316.
Park, H., Gao, S., and Samuel, S. (2017). “Modeling effects of forward glance durations on latent hazard detection.” Transportation research record, SAGE Publications Sage CA: Los Angeles, CA, 2663(1), 90–98.
Park, J., Jung, W., and Ha, J. (2001). “Development of the step complexity measure for emergency operating procedures using entropy concepts.” Reliability Engineering & System Safety, Elsevier, 71(2), 115–130.
Rouse, W. B., and Rouse, S. H. (1983). “Analysis and classification of human error.” IEEE Transactions on Systems, Man, and Cybernetics, IEEE, (4), 539–549.
Sharma, A., and Suryawanshi, A. (2016). “A novel method for detecting spam email using KNN classification with spearman correlation as distance measure.” International Journal of Computer Applications, Citeseer, 136(6), 28–35.
Swain, A. D., and Guttmann, H. E. (1983). Handbook of human-reliability analysis with emphasis on nuclear power plant applications. Sandia National Labs.
Ulrich, T. A., Lew, R., Werner, S., and Boring, R. L. (2017). “Rancor: a gamified microworld nuclear power plant simulation for engineering psychology research and process control applications.” Proceedings of the Human Factors and Ergonomics Society Annual Meeting, SAGE Publications Sage CA: Los Angeles, CA, 398–402.
Wood, R. E. (1986). “Task complexity: Definition of the construct.” Organizational behavior and human decision processes, Elsevier, 37(1), 60–82.
Zagermann, J., Pfeil, U., and Reiterer, H. (2016). “Measuring cognitive load using eye tracking technology in visual computing.” Proceedings of the sixth workshop on beyond time and errors on novel evaluation methods for visualization, 78–85.
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Published online: May 24, 2022
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