This study checked the degree of contamination of depleted uranium used as a chemical catalyst in the manufacturing process within the facilities of nuclear fuel materials to analyze the environmental sample for abandoning their industrial factory sites and investigated how many times of contamination were made compared to (natural) abundance of isotopes if contamination was made within the facilities. In order to analyze the degree of uranium contamination, the researcher of this study divided the upper and lower parts of 20 points from the surface of the earth within the factory site made of concrete and extracted 40 samples from the surface of the earth and 15 samples for checking air and surface water contamination. The study checked the concentration of uranium existing in small quantity in the samples by liquefying a large amount of samples using pre-treatable acid percolation.

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