Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Analysis of interface management tasks in a digital main control room

  • Choi, Jeonghun (Ulsan National Institue of Science and Technology) ;
  • Kim, Hyoungju (KEPCO Nuclear Fuel Co., Ltd.) ;
  • Jung, Wondea (Integrated Safety Assessment Division, Korea Atomic Energy Research Institute) ;
  • Lee, Seung Jun (Ulsan National Institue of Science and Technology)
  • Received : 2018.12.12
  • Accepted : 2019.04.09
  • Published : 2019.09.25
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Abstract

Development of digital main control rooms (MCRs) has greatly changed operating environments by altering operator tasks, and thus the unique characteristics of digital MCRs should be considered in terms of human reliability analysis. Digital MCR tasks can be divided into primary tasks that directly supply control input to the plant equipment, and secondary tasks that include interface management conducted via soft controls (SCs). Operator performance regarding these secondary tasks must be evaluated since such tasks did not exist in previous analog systems. In this paper, we analyzed SC-related tasks based on simulation data, and classified the error modes of the SCs following analysis of all operational tasks. Then, we defined the factors to be considered in human reliability analysis methods regarding the SCs; such factors are mainly related to interface management and computerized operator support systems. As these support systems function to reduce the number of secondary tasks required for SC, we conducted an assessment to evaluate the efficiency of one such support system. The results of this study may facilitate the development of training programs as well as help to optimize interface design to better reflect the interface management task characteristics of digitalized MCRs.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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