第４５卷第４期核化学与放射化学Vol４５No４２０２３年８月JournalofNuclearandRadiochemistryAug．２０２３收稿日期:２０２２Ｇ０６Ｇ２０;修订日期:２０２２Ｇ１１Ｇ３０∗通信联系人:涂俊ReillexＧReillex阴离子交换分离克量级铀中微量钚谢翔,郭继军,李刚,吴牧晓,涂俊∗中国工程物理研究院核物理与化学研究所,四川绵阳６２１９００摘要:采用ReillexＧReillex串联阴离子交换色层柱,建立了高铀钚比样品中微量钚的高效分离方法.考察了树脂类型、淋洗条件、价态调节等对钚分离效果的影响,确定了分离流程的条件.当铀钚质量比为１０６时,经两级Reillex柱分离后,钚的平均回收率为９９３５％,铀的去污因子大于１０７.最后使用该方法从克量级辐照铀靶中分离出了微克量级超纯２３９Pu,(２３８U＋２３８Pu)/２３９Pu原子比为(３６０±１１５)×１０－５(n＝６).关键词:铀基体;微量钚;阴离子交换;分离中图分类号:O６１５．１１文献标志码:A文章编号:０２５３Ｇ９９５０(２０２３)０４Ｇ０３４５Ｇ０８doi:１０．７５３８/hhx．２０２３．YX．２０２２０４４SeparationofTracePlutoniumFromBulkUraniumUsingReillexＧReillexAnionExchangeChromatographyXIEXiang,GUOJiＧjun,LIGang,WUMuＧxiao,TUJun∗InstituteofNuclearPhysicsandChemistry,ChinaAcademyofEngineeringPhysics,Mianyang６２１９００,ChinaAbstract:AhighlyefficientseparationmethodfortraceplutoniumfromhighuraniumplutoＧniumratiosampleswasestablishedbycombiningtwoReillexanionexchangechromatographＧiccolumns．Theeffectsofresintype,washcondition,valencestateadjustmentonplutoniumseparationwereinvestigated,andtheconditionsofseparationprocessweredetermined．Whenthemassratioofuraniumtoplutoniuminthefeedliquidis１０６,aftertwoＧstageReillexcolumnseparation,theaverageyieldofplutoniumis９９３５％andthedecontaminationfactorofuraniumisgreaterthan１０７．Usingthisprocess,highpuritytrace２３９Puisseparatedfromirradiateduraniumtarget,andtheatomicratioof(２３８U＋２３８Pu)/２３９Puis(３６０±１１５)×１０－５(n＝６)．Keywords:bulkuranium;traceplutonium;anionexchangechromatography;separation２３９Pu主要通过反应堆产生的热中子轰击２３８U生成.在某些特定的低燃耗铀样品中,铀与生成钚的质量比约为１０６,同时伴有Ce、Zr、...
