后处理中锕系元素和贵金属元素光化学调价方法
PUREX流程是目前世界上唯一实现工业化应用的后处理流程,该流程的关键技术之一在于调控Pu、Np、Tc等元素的价态。传统上PUREX流程采用化学法调节元素价态,但化学调价有时会遇到困难,比如在硝酸体系下用化学试剂将Np调节至单一价态十分困难。和化学法相比,光化学调价具有方法简单、二次废物体积少、方便远程控制、对材料耐辐照要求不高等优点。将光化学调价和溶剂萃取结合很有潜力实现金属元素的高效分离,只依靠光化学方法将金属离子还原至单质状态也可以实现金属元素的分离和回收。此外,紫外光的照射还能在室温下显著促进UO2在硝酸溶液中的溶解。...
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| Published in | 核化学与放射化学 Vol. 38; no. 2; pp. 65 - 78 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学技术大学核科学技术学院,安徽合肥,230027%中国科学技术大学核科学技术学院,安徽合肥230027
2016
中国科学院核能安全技术研究所,安徽合肥230031%中国原子能科学研究院放射化学研究所,北京,102413 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-9950 |
| DOI | 10.7538/hhx.2016.38.02.0065 |
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| Summary: | PUREX流程是目前世界上唯一实现工业化应用的后处理流程,该流程的关键技术之一在于调控Pu、Np、Tc等元素的价态。传统上PUREX流程采用化学法调节元素价态,但化学调价有时会遇到困难,比如在硝酸体系下用化学试剂将Np调节至单一价态十分困难。和化学法相比,光化学调价具有方法简单、二次废物体积少、方便远程控制、对材料耐辐照要求不高等优点。将光化学调价和溶剂萃取结合很有潜力实现金属元素的高效分离,只依靠光化学方法将金属离子还原至单质状态也可以实现金属元素的分离和回收。此外,紫外光的照射还能在室温下显著促进UO2在硝酸溶液中的溶解。 |
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| Bibliography: | LI Fu-hai,DING Zuo-ming,LIN Ming-zhang,HE Hui,YE Guo-an(1. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230027, China; 2. Institute of Nuclear Energy Safety Technology, Chinese Academy of Science, Hefei 230031, China; 3. China Institute of Atomic Energy, P. O. Box 275(26), Beijing 102413, China) photochemistry; valence adjustment; separation; dissolution of UO2 11-2045/TL The PUREX process is the only reprocessing process applied on an industrial scale in the world.One of the key technologies of this process is to adjust the valence of plutonium(Pu),neptunium(Np)and technetium(Tc).Traditionally the valence of these elements should be adjusted by chemical methods.Chemical methods,however,might meet difficulties such as the valence adjustment of Np in nitric acid solution.Compared with the chemical methods,photochemical methods offer the remarkable advantages such as simpler steps,less secondary wastes,easier remote control techniques and low requirements for radio |
| ISSN: | 0253-9950 |
| DOI: | 10.7538/hhx.2016.38.02.0065 |