@misc{oai:repo.qst.go.jp:00072661,
 author = {S.K.Sahoo and S.Mishra and T.Aono and S.Tokonami and サフー サラタ クマール and 青野 辰雄},
 month = {Sep},
 note = {Fukushima Daiichi Nuclear Power Plant (FDNPP) accident caused radioactive contamination due to deposition of mainly radiocesium as well as many long-lived radionuclides surrounding the area[1]. Radionuclides can be mobilized in aquatic systems depending on different environmental conditions, Therefore, the fate and transfer of these radionuclides in the soil water system plays an important role  in radiation protection and dose assessment. 
\nIn the present study, soil and water samples were collected from contaminated areas around FDNPP. Inductively coupled plasma mass spectrometry (ICP-MS) is used for total uranium concentration. Emphasis has been given on isotope ratio measurement of uranium 234U/238U (activity ratio) and 235U/238U using thermal ionization mass spectrometry (TIMS) that gives us the idea about its contamination during accident. 
\nFor the migration behavior, its distribution coefficient (Kd) has been determined using laboratory batch method [2]. Chemical characterization of soil with respect to different parameters has been carried out in order to explain the radionuclide mobility in this particular area. The effect of these soil parameters on distribution coefficient of uranium has been studied in order to explain the radionuclide mobility in this particular area. The distribution coefficient values for uranium are found to vary from 1600-9000 L/Kg. A large variation in the distribution coefficient values shows the retention or mobility of uranium is highly dependent on soil characteristics in the particular area. This variation is explained with respect to pH, Fe, Mn, CaCO3 and organic content. There is a very good correlation of uranium Kd obtained with Fe content. There is a variation with uranium activity ratio where as no enrichment of 235U has been noticed in the studied area. However contaminated water used for cooling the reactor vessel stored near the reactor after accident, may contain radioactive uranium. Therefore, it is of a concern to understand leaching of U in the groundwater system. 
\n[1]P. Povinec, K. Hirose, M. Aoyama, “Fukushima Accident: Radioactivity impact on the
        environment” (2013). 
[2]S. Mishra, et al., Rad. Prot. Dosim. 152:238 (2012)., 16th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere  (MIGRATION 2017)},
 title = {MEASUREMENT OF URANIUM ISOTOPES AND ITS DISTRIBUTION COEFFICIENT IN FUKUSHIMA CONTAMINATED SOILS TO UNDERSTAND MOBILITY},
 year = {2017}
}