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Study on the Atmospheric Diffusion of Airborne Radionuclide under LOCA of Offshore Floating Nuclear Power Plants Based on CALPUFF

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  • Yan Huang

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang 421001, China)

  • Xiaoming Song

    (Nuclear Power Institute of China, Chengdu 610213, China)

  • Shuliang Zou

    (Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang 421001, China)

  • Shoulong Xu

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang 421001, China)

  • Fang Zhao

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang 421001, China)

  • Na Liu

    (School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
    Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang 421001, China)

Abstract

Studying the migration and diffusion of radionuclides plays an important role in emergency decision making and accident mitigation of floating nuclear power plants. Based on the CALPUFF model, this paper simulates the spatial distribution and concentration distribution of airborne radionuclides 131 I diffusion under the conditions of sailing and power supply under LOCA (Loss-of-Coolant Accident) of the floating nuclear power plant, and the influence of four meteorological parameters, namely wind speed, cloudiness, temperature and air pressure, on the migration was analyzed using sensitivity analysis. The results show that the wind direction affects the diffusion direction of 131 I, and the concentration of 131 I decreases with the increase in the diffusion distance; under the same conditions, the radionuclides diffuses farther and the affected area is larger under the sailing condition. Wind speed is the dominant factor affecting the diffusion of radionuclides, followed by the cloud amount parameter, temperature parameter, and air pressure parameter. The research results can provide theoretical support for emergency responses to nuclear accidents in offshore floating nuclear power plants.

Suggested Citation

  • Yan Huang & Xiaoming Song & Shuliang Zou & Shoulong Xu & Fang Zhao & Na Liu, 2023. "Study on the Atmospheric Diffusion of Airborne Radionuclide under LOCA of Offshore Floating Nuclear Power Plants Based on CALPUFF," Sustainability, MDPI, vol. 15(3), pages 1-14, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:3:p:2572-:d:1053395
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    References listed on IDEAS

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    1. Mikołaj Oettingen, 2021. "Assessment of the Radiotoxicity of Spent Nuclear Fuel from a Fleet of PWR Reactors," Energies, MDPI, vol. 14(11), pages 1-23, May.
    2. Mikołaj Oettingen, 2022. "The Application of Radiochemical Measurements of PWR Spent Fuel for the Validation of Burnup Codes," Energies, MDPI, vol. 15(9), pages 1-15, April.
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