Evseeva T I, Maĭstrenko T A, Geras'kin S A, Belykh E S, Umarov M A, Sergeeva I Iu, Sergeev V Iu
Radiats Biol Radioecol. 2008 Sep-Oct;48(5):573-83.
Results on estimation of modern radioecological situation at nuclear explosion "Chagan" based on large-scale cartographic studies (1:25000) of a test area (4 km2) are presented. Maximum gamma-irradiation doses were observed at bulk of ground surrounded a crater and at radioactive fall-outs extended to the North-East and to the SouthWest from the crater. Based on data on artificial radionuclide specific activity most part of soil samples were attributed to radioactive wastes according to IAEA (1996) and OSPORB (1999). Natural decrease of soil radioactivity up to safety level due to 60Co, 137Cs, 90Sr, 152Eu, 154Eu radioactive decay and 241Am accumulation-decay will not take place within the next 60 years at the studied area.
本文给出了基于对试验区（4平方公里）进行的大规模制图研究（1:25000）对“查干”核爆炸现场现代放射生态状况的评估结果。在弹坑周围的大部分地面以及从弹坑向东北和西南延伸的放射性沉降区域观察到了最大伽马辐射剂量。根据人工放射性核素比活度数据，按照国际原子能机构（1996年）和俄罗斯国家辐射安全监督局（1999年）的标准，大部分土壤样本被归类为放射性废物。在所研究区域，由于钴-60、铯-137、锶-90、铕-152、铕-154的放射性衰变以及镅-241的累积-衰变，土壤放射性在未来60年内不会自然降低至安全水平。
