[화학] 방사능 분석기술을 이용한 90Sr, 239,240Pu, 238Pu 및 241Am 축차분리

본 연구에서는 음이온 교환수지와 Sr-Spec 수지를 사용하여 토양중 90Sr, 241Am 및 Pu 동위원소들에 대하여 축차적으로 분리하는 정량법을 제시하였다. 플루토늄은 음이온 교환수지를 이용하여 분리하였고, 아메리슘 및 스트론튬은 옥살산 공침법 및 Sr-Spec 수지를 사용하여 순수 분리하였다. Pu 및 Am동위원소는 알파 스펙트로메트리법으로 정량하였고, Sr-90은 액체섬광계수기를 사용하여 정량하였다. 본연구에서 고찰된 90Sr, 241Am 및 Pu 동위원소 분석법을 IAEA 기준시료에 적용하여 분석법의 타당성을 검증하였다. This paper presents a quantitative method of sequential separation of 90Sr, 241Am and Pu radionuclides with an anion exchange resin and a Sr-Spec resin. The Pu isotopes were purified with an anion exchange resin. The americium and strontium fractions were separated from the matrix elements with an oxalate co-precipitation method. Americium fraction was separated from the strontium fraction with iron co-precipitation method and purified from lanthanides with anion exchange resin. Strontium-90 was purified from other hindrance elements with the Sr-Spec resin after oxalate co-precipitation. The measurement of Pu and Am isotopes was carried out by an α-spectrometer. Strontium-90 was measured by a liquid scintillation counter. The radiochemical procedure of 90Sr, 241Am and Pu radionuclides investigated in this study has been validated by application to IAEAReference soils. KCI Citation Count: 0