EXTRACTION OF Am、Pu AND U BY DICYCLOHEXANO 18 CROWN 6/1 OCTANOL FROM HNO_3 SOLUTION AND SIMULATED HLLW

The extraction of americium,plutonium and uranium by dicyclohexano 18 crown 6(DCH18C6)/1 octanol from HNO 3 solution and simulated HLLW are studied.The influences of acidity and dilution factor of simulated HLLW are studied.At low HNO 3 concentration and dilution factor above 2, 0.1 mol/L DCH18C6/1 octanol extracts very little americium,plutonium and uranium.The distribution ratios of Am、Pu and U increase with the increase of HNO 3 concentration in aqueous phase,and decrease with increasing of dilution factor of HLLW.The distribution ratio of extraction of Pu(Ⅳ) increases with the increase of extractant concentration.