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To rigorously assess the complexity of operator task execution under nuclear power plant accident scenarios, this study proposes an operator task-handling complexity (OTHC) evaluation model based on information entropy and image entropy. The model evaluates complexity from three dimensions: interface information complexity (IIC), task complexity (TC), and protocol complexity (PC). It establishes an evaluation system comprising eight complexity indicators, including interface layout, icons, text, and color. The entropy weighting method was employed to objectively assign weights, enabling quantitative evaluation of complexity using the model. To validate the model's effectiveness, a primary circuit small-break loss-of-coolant accident diagnosis task was used as a case study, for which a complexity network diagram is constructed, and the proposed model is applied to assess complexity. Subjective workload data are collected using the national aeronautics and space administration task load index (NASA-TLX) scale. The results show that the OTHC of the primary circuit is higher than that of the secondary circuit. The complexity assessed by the constructed model is highly positively correlated with subjective complexity, effectively reflecting the actual level of task processing complexity.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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