Improvement of a Dynamic Food Chain Model Considering the Influence of Radioactive Contamination of Foods by Rainfall During a Nuclear Emergency

원자력 사고 중 강우에 의한 음식물 오염영향을 고려한 역동학적 섭식경로모델 개선

  • Published : 2002.03.30


For the consideration of the influence on radioactive contamination of foods due to rain during the release period of radionuclides in a nuclear accident, the previous dynamic food chain model was improved. Wet interception coefficients for the agricultural plants were derived as a function of radionuclide and rainfall amount, and mathematical formula of the model was also re-established. In the results for the same time-integrated radioactive concentrations on the ground, radioactive contamination of foods decreased greatly by rainfall, and it decreased dramatically according to increasing rainfall amount. It means that predictive contamination in foods using the previous dynamic food chain model, in which dry interception to the agricultural plants is only considered, can be overestimated. Among radionuclides considering in this study ($^{137}Cs,\;^{90}Sr,\;^{131}I$), influence of rainfall for food contamination was the most sensitive to $^{131}I$, and the least sensitive to $^{90}Sr$.


  1. W. T. Hwang, G. S. Cho and M. H. Han, 'Development of a Dynamic Food Chain Model DYNACON and Its Application to Korean Agricultural Conditions', Journal of Nuclear Science and Technology, 35(6), 454-461 (1998)
  2. M. H. Han et al., 'Development of Environmental Radiation Protection Technology : Development of Radiological Emergency Preparedness and Biological Dosimetry Technology', Korea Atomic Energy Research Institute, KAERI/RR-1913/98 (1998)
  3. Personal Communication with S. R. Peterson, Lawrence Livermore National Lab.
  4. IAEA, 'The International Chernobyl Project: Assessment of Radiological Consequences and Evaluation of Protective Measures', Technical Report (1991)
  5. A. C. Chamblain, 'Interception and Retention of Radioactive Aerosols by Vegetation', Atmospheric Environment 4, 57-63 (1970)
  6. IAEA, 'Handbook of Parameter Values for the Prediction of Radionuclide Transfer in Temperate Environment', IAEA Technical Reports Series No. 364 (1994)