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http://dx.doi.org/10.9727/jmsk.2013.26.3.209

Effects of Weathering Processes on Radioactive Cesium Sorption with Mineral Characterization in Korean Nuclear Facility Site  

Chang, Seeun (Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH))
Choung, Sungwook (Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH))
Um, Wooyong (Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH))
Chon, Chul-Min (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Journal of the Mineralogical Society of Korea / v.26, no.3, 2013 , pp. 209-218 More about this Journal
Abstract
This study was to characterize the minerals in fractured and bedrock zone, and determine quantitatively sorption for radioactive cesium ($^{137}Cs$) at the Korean nuclear facility site. The rock samples were granite group that mainly consists of quartz and feldspar with 10~20% mica minerals. Chlorite was observed as secondary mineral for the rock samples collected from fractured zone, but not for bedrock samples. The $^{137}Cs$ sorption distribution coefficients increased to $K_d$ = 880~960 mL/g in the fractured zone because of the presence of secondary minerals formed by weathering processes, compared to the bedrock zone ($K_d$ = 820~840 mL/g). These results suggest that the released $^{137}Cs$ to groundwater environment could be significantly retarded in the fractured zone in the case of severe nuclear accident at the study site.
Keywords
radioactive cesium; adsorption; fractured zone; weathering; chlorite; mica minerals;
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