Thus , it is expected that the purex process would be improved greatly through using dmhan as a reductant 因此dmhan有可能应用在后处理流程之中，从而对后处理流程作出改进。
2.
In purex process , the separation of uranium / plutonium is achieved based on quick and quantitative reduction of pu ( iv ) to pu ( ih ) 在purex流程铀钚分离工艺中，一般使用一定的还原剂迅速和定量地还原pu以实现u 、 pu的分离。
3.
( 5 ) in order to predict the distribution of u , pu and nitric acid in the purex process , a computer program , mdcex1 . 0 , for simulating the distribution of the solutes was developed . the mathematical model is based on quisa - newton arithmetic 的）研究了dm的hno3溶液对30 tbp煤油中p3w ）的单级还原反革行为，考察了dmhan浓度、 hno3浓度、温度以及相接触时间对pll （ iv ）反苹取率的影响。
4.
As the representatives of salt - free organic reductants , hydrazine derivatives possess such advantages as strong reductivity and high selectivity . the kinetics of the reaction of np ( vi ) , pu ( iv ) reduction by hydrazine derivatives have been studied deeply since 1980s . the results show that it ' s potential for applying hydrazine derivatives as salt - free reductants in purex process in the near future 以肼类衍生物为代表的有机无盐还原剂，具有还原能力强、选择性高的特点。自上世纪八十年代以来，对于肼类衍生物还原np ( ) 、 pu ( )的动力学已进行了较为深入的研究，并获得了一系列重要的参数。
5.
The path - way controlling of neptunium in co - decontamination step of purex process , the extraction thermodynamics of amido podand and its usage in recovery of actinides from simulated hllw have been investigated . more than 95 % np were maintained in np ( v ) in 1a extractor and flowed into 1 aw , if enough amount of hno2 was added in feed adjustment and then hno2 scavenger ( urea ) was added before extraction . three kinds of amido podand were synthesized , and the extraction of lanthanides , actinides and some fission products were studied . one of them ( tbopda , n , n , n ' , n " - tetrabutyl - 3 - oxa - pantenadiamide ) was used as extractant to recover actinides from hllw . the results of experiments show that more than 99 . 99 % actinides were recovered from hllw and separated basically in groups . the main digests are as follows : 1 镎走向控制研究中通过调价阶段加入亚硝酸、而萃取前清除亚硝酸的独特办法可以将大于95的镎赶入1aw 。合成了三种酰胺荚醚萃取剂，研究了它们对锕系和裂片元素的萃取热力学，通过条件实验选择了其中一种荚醚tbopda ( n ， n ， n ’ ， n ’ ?四丁基? 3 ?氧戊二酰胺) ，进行了从模拟高放废液中分离锕镧系元素的工艺研究，锕系的回收率大于99 . 99 ，并且基本上实现了锕镧元素的组分离。其要点如下： 1
6.
With the development of nulear power industry , more and more attention has been given to the spent nulear fuel reprocessing . purex process will remain predominant in the foreseenable future . because the valence of np , one kind of transuranium elements , is easy to interchange , the route of np in purex process is difficult to be controled . a lot of work has been done on the control of neptunium way in the world 随着核电的发展，乏燃料后处理引起了人们的广泛关注。 purex流程在乏燃料后处理中一直占有主导地位。由于超铀元素np的化学价态容易相互转变，使purex流程中np的走向不易控制而倾于分散。
7.
The recovery can reach 95 % after it extracts once , rsd % is lower than 10 % , the detection limit of zirconium is 1 . 3u . g / ml . and increasing the application of film in xrf is studied . the method of using organic sample to make resource after extracted by tta can be used to determine zirconium in simulated p rocess solution of spent fuel reprocessing quickly and veraciouly 萃取一次便可达到理想的萃取效果，回收率可达95 ，相对标准偏差10 ，锆的检出限为1 . 30 g / ml ，同时改进了薄膜法在x射线荧光光谱法中的应用范围，此方法采用tta萃取分离的有机相直接制源可快速、准确地对测定purex模拟工艺料液中的锆含量。
