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This study conducted γ-radiation cumulative dose monitoring and instantaneous monitoring of γ-radiation air absorption dose rates at 31 monitoring locations around the Fangchenggang nuclear power plant, analyzing the radiation level monitoring results to grasp the long-term changes in terrestrial radiation levels around the nuclear power plant. The results show that from 2018 to 2023, the environmental γ-radiation cumulative dose rate monitoring values around the Fangchenggang nuclear power plant ranged from 62.5 to 141.3 nGy/h, with an average value of 99.1 nGy/h; the instantaneous dose rates ranged from 55.0 to 119.5 nGy/h, with an average value of 93.7 nGy/h. The terrestrial environmental radiation levels around the plant remained consistent before and after the commercial operation of its three units, with both γ-radiation cumulative dose rates and instantaneous dose rates maintained at normal levels, indicating that the emission of airborne effluents during the operation of the nuclear power did not impact the radiation levels in the surrounding environment. There was significant variation in the γ-radiation cumulative dose rates at different monitoring points, with a tendency for higher levels in winter and lower in summer, suggesting that γ-radiation cumulative dose rates are greatly influenced by environmental factors.
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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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