Journal of Radiation Research and Radiation Proces ›› 2016, Vol. 34 ›› Issue (2): 20801-020801.doi: 10.11889/j.1000-3436.2015.rrj.34.020801

• RADIATION PHYSICS • Previous Articles    

A multi-medium coupling dispersion model of radionuclide in a nuclear accident

LIU Pan, DANG Tongqiang, HE Peng, HE Tao, LONG Pengcheng   

  1. Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2015-10-09 Revised:2015-11-30 Online:2016-04-20 Published:2016-03-17
  • Supported by:

    Supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDA03040000)

Abstract:

In order to predict the dispersion of radionuclides both in atmosphere and aquatorium, a new model was established to couple the Gaussian puff model and Eulerian model. The results of the coupling model presented good agreements with the references, which demonstrated the validity of all the modules. The coupling model was applied to simulate diffusion and concentration distribution of 131I in atmospheric and aquatic medium in the fuel assembly meltdown accident of China lead-based experiment reactor. The results showed that the distribution range of atmospheric pollutions was within 10 km 2 h after accident, meanwhile distribution range of aquatic pollutions was between 10 km and 20 km. Under the fuel assembly meltdown accident, the contaminant concentration in atmospheric and aquatic are still below the national standard limit.

Key words: Multi-medium, Coupling dispersion model, Radionuclide, China lead-based research reactor, SuperMC

CLC Number: 

  • TL732