Analysis of actinide elements in ash and cement solidified products

Shimada, Asako ; Kameo, Yutaka ; Takahashi, Kuniaki 

Neptunium separation procedure was added into reported separation scheme of Pu and Am to construct analytical scheme of Pu, Np, and Am using one extraction chromatographic column. Based on the result, Pu, Np, and Am in ash of inflammable waste and cement solidified waste were analyzed. Plutonium and Am were determined accurately and more than 80% of recoveries were obtained. Although a few % of Pu and Am were detected in Np fraction, they did not influence the determination of Np. Uranium was considered to exist in the Np fraction. However, U(VI) was not co-precipitated with samarium fluoride. Because source was prepared by co-precipitation with samarium fluoride, determination of Np was not influenced by U. It was found that Pu, Np, and Am could be separated by one extraction chromatographic column.