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

Yan Huang, Xiaoming Song, Shuliang Zou (), Shoulong Xu (), Fang Zhao and Na Liu
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Yan Huang: School of Resource Environment and Safety Engineering, 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
Fang Zhao: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Na Liu: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China

Sustainability, 2023, vol. 15, issue 3, 1-14

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.

Keywords: floating nuclear power plant; migration regularity; Lagrange model (CALPUFF); sensitivity analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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