造粒無機イオン交換体による発熱元素および超ウラン元素の分離

概要

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The mutual separation of heat-generating nuclides (Cs, Sr) and transuranium element (Am) from denitrated high-level liquid wastes has been studied by using inorganic ion exchangers of crystalline antimonic acid (C-SbA) and H-form of mordenite (HSM). Since the C-SbA exchanger exhibited high distribution coefficients (K_d) of Na^+, Sr^<2+> and Am^<3+>, and HSM had high selectivity towards Cs^+, these nuclides were effectively adsorbed on the two-layered column of C-SbA/HSM. The successive elution of Am^<3+>⟶Cs^+⟶Sr^<2+> was accomplished by flowing 2M HNO_3,5M NH_4NO_3 and 13M HNO_3 solutions as eluents, respectively; the elution percentage of Am^<3+>, Cs^+ and Sr^<2+> was estimated to be 89.8,98.0 and 88.0%, respectively.mutual separationcesiumstrontiumamericiuminorganic ion exchangerhigh-level liquid wastesantimonic acidmordeniteelution
東北大学の論文