Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Investigation of aerosol resuspension model based on random contact with rough surface

  • Liwen He (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Lili Tong (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Xuewu Cao (School of Mechanical Engineering, Shanghai Jiao Tong University)
  • Received : 2022.01.05
  • Accepted : 2022.11.26
  • Published : 2023.03.25
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Abstract

Under nuclear reactor severe accidents, the resuspension of radioactive aerosol may occur in the containment due to the disturbing airflow generated by hydrogen combustion, hydrogen explosion and containment depressurization resulting in the increase of radioactive source term in the containment. In this paper, for containment conditions, by considering the contact between particle and rough deposition surface, the distribution of the distance between two contact points of particle and deposition surface, rolling and lifting separation mechanism, resuspension model based on random contact with rough surface (RRCR) is established. Subsequently, the detailed torque and force analysis is carried out, which indicates that particles are more easily resuspended by rolling under low disturbing airflow velocity. The simulation result is compared with the experimental result and the prediction of different simulation methods, the RRCR model shows equivalent and better predictive ability, which can be applicable for simulation of aerosol resuspension in containment during severe accident.

Keywords

Acknowledgement

This work was supported by National Natural Science Foundation of China (U1967202).

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