@misc{oai:repo.qst.go.jp:00068386,
 author = {Takahashi, Tomoyuki and Tsukada, Hirofumi and Uchida, Shigeo and Amano, Hikaru and 高橋 知之 and 塚田 祥文 and 内田 滋夫},
 month = {Oct},
 note = {For an assessment of a public impact caused by radionuclides released from nuclear facilities, it is necessary to estimate reasonably an internal dose by the pathway of ingestion of polished rice because it is a staple food in Japan.  For an estimation of concentration of radionuclides in polished rice, transfer coefficient model, which uses a ratio of concentration of radionuclides in edible part to that in cultivated land, is usually applied. However, it is important to understand a behavior of radionuclides in the soil plant system for validation of a transfer coefficient model and parameters used for the assessment.  In this study, we developed a dynamic compartment model for an analysis for migration of radiocesium from paddy field to rice plant.
  Conceptual illustration of 3 compartment model developed in this study is described in Fig. 1.  In this study, we assumed a case that paddy field was contaminated by radiocesium when rice plant does not exist. Therefore, direct deposition pathways from atmosphere to leaf and stem and ear compartment were not considered. The transfer rates among paddy field, leaf and stem and ear were determined by experimental data and some references. A sigmoid curve was used as growing curves of a part above the ground (total weight of leaf and stem and ear) and an ear part. It is assumed that radiocesium accumulated in leaf and stem and ear at harvest were removed from paddy field system. Infiltration were considered for removal pathway from paddy field.
  For a development of this dynamic compartment model and analysis, a migration prediction code MOGRA was used. In future, we will improve this model, for example, addition of direct deposition pathway for an assessment of accidental release., International Symposium on Radioecology and Environmental Dosimetry},
 title = {An analysis for migration of cesium from paddy field to ride plant by using MOGRA},
 year = {2003}
}