Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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Model for assessing the contamination of agricultural plants by accidentally released tritium

삼중수소 사고유출로 인한 농작물 오염 평가 모델

  • Published : 2005.03.30
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Abstract

A dynamic compartment model was developed to appraise the level of the contamination of agricultural plants by accidentally released tritium from nuclear facility. The model consists of a set of inter-connected compartments representing atmosphere, soil and plant. In the model three categories of plant are considered: leafy vegetables, grain plants and tuber plants, of which each is modeled separately to account for the different transport pathways of tritium. The predictive accuracy of the model was tested through the analysis of the tritium exposure experiments for rice-plants. The predicted TFWT(tissue free water tritium) concentration of the rice ear at harvest was greatly affected by the absolute humidity of air, the ratio of root uptake, and the rate of rainfall, while its OBT(organically bound tritium) concentration the stowing period of the ear, the absolute humidity of air and the content of hydrogen in the organic phase. There was a good agreement between the model prediction and the experimental results lot the OBT concentration of the ear.

원자력시설로부터 삼중수소 사고 누출시 시설 주변 농작물의 삼중수소 오염 평가를 위한 동적격실모델 ECOREA-H3를 개발하였다. 모델의 격실은 크게 대기, 토양, 농작물로 구성되며 농작물은 엽채류 곡물류, 근군류의 3개 소그룹으로 분류하여 각각 독립적으로 모델링하였다. 벼에 대한 삼중수소 피폭실험 해석을 통해 모델의 예측 정확도가 조사되었다. 모델링 결과 추수시 벼이삭의 TFWT 농도는 입력데이터 중 공기의 절대습도, 뿌리흡수비 강우량에 OBT 농도는 공기의 절대습도, 이삭의 성장기간, 유기물의 수소함량의 영향을 상대적으로 크게 받는 것으로 나타났다. 벼이삭 OBT 농도에 대한 모델 계산과 실험 측정값은 잘 일치하였다.

Keywords

References

  1. Raskob, W, UFOTRI : Program for assessing the offsite consequences from accidental tritium releases, Report KfK-4605, Kernforschungs-zentrum Kalsruhe, Germany(1990)
  2. Raskob, W., Description of the new version 4.0 of the tritium model UFOTRI including user guide, Report KfK-5194, Kernforschungs-zentrum Kalsruhe, Germany(1993)
  3. Russel, S.B. and G.L. Ogram, ETMOD : A new environmental tritium model, Fusion Technology, 21, 645-650(1992) https://doi.org/10.13182/FST92-A29820
  4. Smith, GM, P.G. Robinson and M.J. Stenhouse, H3 food chain modeling following short-term release to atmosphere. Report EE3947-1, Version 2.0, Intera Information Technologies, Chiltern Housem 45 Station Rd, Henley-on-Thames, Oxfordshire, U.K(1995)
  5. Higgins, N.A, TRIF-An Intermediate Approach to Environmental Tritium Modeling, J. of Environmental Radioactivity, 36, 253-267 (1997) https://doi.org/10.1016/S0265-931X(96)00091-4
  6. Barry, P.J., B.M. Y. Watkins, Y. Belot, PA Davis, O. Edlund, D. Galeriu, W. Raskob, S. Russell, and O. Togawa, Intercomparison of model predictions of tritiu concentrations in soil and food following acute airborne HTO exposure, J. of Environmental radioactivity, 42, 191-207(1999)
  7. Kim, S.B., W.Y. Lee, Y.H. Choi and J.H. Lee, Organically bound tritium in the plants acute HTO exposure, J. Korean Association Radiat. Prot, 23(1), 25-32(1998)
  8. Km, S.B, M.H. Lee, G.S. Choi, Y.H. Choi and C.W. Lee, Investigation into tritium behavior in Chinese cabbage and rice after a short-term exposure of HTO, J. of Korean Association Radiat. Prot., 23(2), 75-82(1998)
  9. Choi, Y.H., KM. Lim, W.Y. Lee, S. Diabate and S. Strack, Tissue free water tritium and organically bound tritium in the rice plant acutely exposed to atmosphere HTO vapor under semi-outdoor conditions, J. of Environmental Radioactivity, 58, 67-85 (2002) https://doi.org/10.1016/S0265-931X(01)00024-8
  10. Choi, HJ., HS. Kang and HS. Lee, Verification of a dynamic compartment model for the tritium behavior in the plants after short HTO release using a BIOMOVS II scenario, J. of the Korean Nuclear Society, 35(2), 171-177(2003)
  11. Peterson, S.R., R.A. Davis and P.R. Rao, Modeling dose from tritium and $^{14}C$ in the environment, TR95ZJ15. J1998.71, Environmental Research Branch, Chalk River Laboratories, Chalk River, Ontario, Canada(1997)
  12. Choi, Y.H., K.M. Lim, W.Y. Lee, H.S. Kang, H.J. Choi, H.S. Lee, S. Diabate and S. Strack, TFWT and OBT concentrations in rice plants exposed to HTO vapor during daytime and nighttime at different seed-developing stages, J. of Korean Association Radiat. Prot., 28, 9-18(2003)
  13. Shinohana, K, Assessment of radiological effects on the regional environment due to the operation of the Tokai reprocessing plant, J. of Environmental Radioactivity, 72, 299-322(2004) https://doi.org/10.1016/S0265-931X(03)00218-2
  14. Keum, D.K., H.S. Lee, HJ. Choi, KM. Lim, Y.H. Choi, and C.W. Lee, A dynamic compartrnent mode for assessing the transfer of radionuclide deposited onto flooded rice-fields, J. of Environmental Radioactivity, 76(3), 349-367(2004) https://doi.org/10.1016/j.jenvrad.2004.02.001
  15. Lee, E.W., T.S. Kwak, M.S. Lee, and K.H. Kim, Rice culture, Hyangmun Press (1996)
  16. Diabate, S. and S. Strack, Doses due to tritium releases by NET-Data base and relevant parameters on biological tritium behavior, KFK 4713, Kernforschungszentrum Karlsruhe, Germany(1990)
  17. Guenot, J. and Y. Belot, Assimilation of $^3H$ in photosynthesizing leavesexposed to HTO, Health Physics, 47, 849-855(1984) https://doi.org/10.1097/00004032-198412000-00005