【摘要】 在Ｐｕｒｅｘ流程１ＡＦ料液中调节钚的价态，先以ＮＨ＿２ＯＨ·ＨＮＯ＿３，Ｎ＿２Ｈ＿４·ＨＮＯ＿３和Ｕ（Ⅳ）为还原剂，详细研究了各种工艺变量对还原Ｐｕ（Ⅵ）的影响。其后，选择最佳还原条件，用模拟１ＡＦ料液做了验证。最终，完成了用ＮＯ￣－＿２氧化Ｐｕ（Ⅲ）至Ｐｕ（Ⅳ）的实验。更多还原

【Abstract】 he process of plutonium valence adjustment in nitric acid solution is studied.Effect of pro-cess condition such as:concentrations of nitric acid,reductant and plutomium;temperature andcatalysis of uranium ect. on reduction efficiency of Pu（Ⅵ）are studied with reductant NH₂OH·HNO₃,N₂H₄·HNO₃ and U（Ⅵ）.More than 99 % of Pu（Ⅵ）in simulated 1AF solution is reductedunder recommended process condition,the plutonium reducted is oxidated to Pu（Ⅳ）with NaNO₂for 1A extractor.更多还原