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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제6호
발행연도
2019.1
수록면
1,638 - 1,649 (12page)

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Top soil samples across the state of Kuwait numering ninety were collected and analysed using gammarayspectrometry, to evaluate the elemental concentration of 238U, 232Th and 40K and their depletion/enrichment. Results of elemental concentration ranges from 0.48 to 2.61 mg/kg, 0.87e5.23 mg/kg, and0.24e2.23%, with a mean values of 1.39 mg/kg, 3.47 mg/kg, and 1.18%, for the 238U, 232Th and 40K,respectively. Further analysis was conducted amongst the five identified soil types, i.e. Aquisalids (S1),Calcigypsids (S2), Petrocalcids (S3), Petrogypsids (S4), and torripsamment (S5). The highest radioactivityconcentrations from both uranium and thorium were recorded in the S2 (Calcigypsids) soil, with a valueof 1.71 (mg/kg) and 4.45 (mg/kg), respectively. Minimum and maximum values of 40K are 1.1(%) and1.27(%) and is prevalent in Aquisalids (S1) and Petrocalcids (S3) soil types, respectively. Ratios of elementalconcentration for 232Th/238U, 40K/238U, 40K/232Th across the soil types are 2.53, 0.09 and 0.03, with acorrelation coefficient of 0.92, 0.34, and 0.38, respectively. A progressively higher 232Th/238U ratio isobserved moving south-wards, indicating lower 238U content in soils from the south relative to thenorthern part. Overall results indicate Kuwait to be relatively an area with low level of naturalradioactivity.

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