| 从高放废液中分离79 Se的流程研究 |
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| 引用本文： | 任同祥,张生栋,郭景儒,崔安智,吴王锁.从高放废液中分离79 Se的流程研究[J].核化学与放射化学,2005,27(4):203-209. |
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| 作者姓名： | 任同祥 张生栋 郭景儒 崔安智 吴王锁 |
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| 作者单位： | 中国原子能科学研究院,放射化学研究所,北京,102413;兰州大学,放射化学与核环境化学研究所,甘肃,兰州,730000;中国原子能科学研究院,放射化学研究所,北京,102413;兰州大学,放射化学与核环境化学研究所,甘肃,兰州,730000 |
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| 摘 要： | 建立了离子交换法与沉淀法相结合的、从高放废液中分离79Se的放化流程.该流程具有去污效果好的特点,对137Cs,90Sr,90Y,99Tc,154Eu的去污因子大于104,对125Sb,113Sn的去污因子大于103,对237Np为2×102.整个流程的收率约为53%.由该流程分离出的79Se样品能够很好地满足液闪测量和质谱测量的要求.
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| 关 键 词： | 79Se 分离 离子交换 沉淀 |
| 文章编号： | 0253-9950（2005）04-0203-07 |
| 收稿时间： | 2005-05-13 |
| 修稿时间： | 2005-08-10 |
Radiochemical Procedure for Separation of 79Se From HLLW |
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| REN Tong-xiang,ZHANG Sheng-dong,GUO Jing-ru,CUI An-zhi,WU Wang-suo.Radiochemical Procedure for Separation of 79Se From HLLW[J].Journal of Nuclear and Radiochemistry,2005,27(4):203-209. |
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| Authors: | REN Tong-xiang ZHANG Sheng-dong GUO Jing-ru CUI An-zhi WU Wang-suo |
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| Abstract: | A radiochemical procedure for separation of ~(79)Se from HLLW based on ion-exchange chromatography and precipitation is developed. The HLLW sample is first loaded to an anion exchange(column) and then eluted with 8 mol/L HCl.The effluent is transferred to 0.75 mol/L HNO_3 medium,and then let it pass a mixed ion exchange column and eluted with 0.3 mol/L HNO_3. After addition of Na_2SeO_3 carrier and holdback carriers for ~(137)Cs,~(90)Sr,~(125)Sb,etc.,the ~(79)Se is precipitated with Na_2SO_3 as elemental Se from the effluent.After washing,the Se precipitate is dissolved in nitric acid.Aliquots of the final solution are measured by HP Ge gamma spectrometry,liquid scintillation spectrometry and ICP-MS.The decontamination factors for interfering radionuclides are estimated.The final recovered ~(79)Se is roved to be raiochemically pure.The overall recovery for ~(79)Se is about 53%. |
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| Keywords: | ^79Se separation ion exchange chromatography precipitation |
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