Talerko Nikolai
Scientific Center for Radiation Medicine, 53 Melnikov Street, Kyiv 04050, Ukraine.
J Environ Radioact. 2005;78(3):311-29. doi: 10.1016/j.jenvrad.2004.04.008.
This work is devoted to the reconstruction of time-dependent radioactive contamination fields in the territory of Ukraine in the initial period of the Chernobyl accident using the model of atmospheric transport LEDI (Lagrangian-Eulerian DIffusion model). The modelling results were compared with available 137Cs air and ground contamination measurement data. The 137Cs atmospheric transport over the territory of Ukraine was simulated during the first 12 days after the accident (from 26 April to 7 May 1986) using real aerological information and rain measurement network data. The detailed scenario of the release from the accidental unit of the Chernobyl nuclear plant has been built (including time-dependent radioactivity release intensity and time-varied height of the release). The calculations have enabled to explain the main features of spatial and temporal variations of radioactive contamination fields over the territory of Ukraine on the regional scale, including the formation of the major large-scale spots of radioactive contamination caused by dry and wet deposition.
这项工作致力于利用大气传输LEDI模型（拉格朗日-欧拉扩散模型）重建切尔诺贝利事故初期乌克兰境内随时间变化的放射性污染场。将建模结果与现有的137Cs空气和地面污染测量数据进行了比较。利用实际气象信息和降雨测量网络数据，模拟了事故发生后的前12天（1986年4月26日至5月7日）137Cs在乌克兰境内的大气传输情况。构建了切尔诺贝利核电站事故单元的详细释放情景（包括随时间变化的放射性释放强度和释放高度的时间变化）。这些计算能够解释乌克兰境内放射性污染场在区域尺度上时空变化的主要特征，包括由干湿沉降造成的主要大规模放射性污染点的形成。
