铀与痕量镤的分离纯化方法

Separation Method of Uranium and Trace Protactinium

摘要: 在高浓铀年龄的测量过程中，涉及到U、Pa的分离提取。本工作以天然铀、自制²³³Pa为指示剂，研究了HCl、HF浓度等对TEVA树脂吸附U、Pa的影响，建立了TEVA色层法分离提取U和Pa的方法。结果表明：Pa的放化收率为99%，对Pa的去污因子为5.4×10³；U的化学收率为96%，对U的去污因子为2.8×10³。

Abstract: It is required to separate uranium and protactinium in the determination of highly enriched uranium age. Distribution coefficients of uranium and protactinium were studied with the concentration of hydrochloric acid, hydrofluoric acid, and so on using nature uranium and ²³³Pa as tracers. The method of separating protactinium and uranium using the TEVA chromatographic method was developed. The radiochemical recovery of protactinium is 99%. The decontamination factor for protactinium is 5.4×10³. The chemical recovery rate of uranium is 96%, and the decontamination factor for uranium is 2.8×10³.