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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
해체 콘크리트 폐기물에 포함된 55Fe와 63Ni 방사능 분석
Radioactivity Analysis of 55Fe and 63Ni in Dismantled Concrete
Abstract
Combined method of extraction chromatography and liquid scintillation analysis was established for determinating radioactivity in solid samples. Activated concrete wastes generated from dismantling KRR-2 were analysed. The sequential separation including precipitation and extraction chromatography resulted in the above 90% chemical recoveries of Fe. Above 62% recoveries of Ni were obtained by this procedure exception to 43.6 and 46.5% recoveries. The seperation and counting procedure was also confirmed with spiked samples of known quantity. The measured and spiked quantity were agreed with the 3.7% and 0.7% variations in the experiments, respectively. The radioactivities of in the dismantled concretes are shown from below MDA to maximum 362 Bq/g. The radioactivities of in all concrete samples are below MDA. The doesn't exist in dismantled concretes from KRR-2. The radioactivity of is decreased rapidly as the sampling depth is increased from the concrete surface.
55Fe, 63Ni, dismantled concrete, extraction chromatography, LSC, 55Fe, 63Ni, 해체 콘크리트, 추출크로마토그래피법, 액체섬광계수법
Reference
JNFCWT
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Korean Radioactive
Waste Society (KRS)
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