低压条件下气态UF<sub>6</sub>纯度的红外光谱分析方法

刘巍; 王春岩

doi:10.7538/tws.2022.youxian.046

低压条件下气态UF₆纯度的红外光谱分析方法

刘巍,
王春岩

核工业理化工程研究院粒子输运与富集技术重点实验室,天津300180

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出版历程
- 刊出日期: 2023-06-19

FTIR Analysis Method for Purity Analysis of Gaseous UF₆ at Low Pressure

Science and Technology on Particle Transport and Separation Laboratory, Research Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China

摘要

摘要: 为建立低压条件下使用傅立叶红外光谱法定量分析气态UF6的纯度方法，本研究选取1 150 cm^-1处的吸收峰作为定量分析UF₆纯度时的特征吸收峰。针对UF₆气体净化后尾料中UF₆残留量的在线分析需求，建立满足真空密封要求的红外分析系统、标准样品配比系统和背景图谱标定装置，对不同纯度、不同压力条件下的气态UF₆标准样品进行分析，建立UF₆纯度与其特征吸收峰面积、稳定压力相关的计算公式。结果表明，通过该方法可准确地得到60~140 Pa的压力范围内和0~100%的纯度范围内气态UF₆的纯度。建立的分析方法和计算公式满足低压条件下UF₆气体在线快速分析的要求。
- 傅立叶红外光谱法 /
- 低压 /
- 六氟化铀 /
- 纯度
Abstract: In order to establish a method for quantitative analysis of the purity of gaseous Uranium hexafluoride using Fourier infrared spectroscopy under low pressure, the absorption peak at 1 150 cm^-1 was selected as the characteristic absorption peak for quantitative analysis of the purity of uranium hexafluoride. It was showed that the pressure of gas analysis has a direct effect on the area of characteristic peak under low pressure condition, which could not be ignored in the process of purity calculation. Aiming at the online analysis demand of the residual UF₆ in the tail material after UF6 gas was purified, the gas standard UF₆ samples with different purity and pressure conditions were analyzed by establishing an infrared analysis system, a standard sample ratio system and a background spectrum calibration device that could meet the requirements of vacuum sealing. The calculation formula for the relationship between the UF₆ purity and its characteristic absorption peak area as well as the gas absolute pressure were established. The experimental results showed that the purity of gaseous UF₆ which was in the pressure range of 60~140 Pa and the purity range of 0~100% could be accurately analyzed by this method.
- fourier infrared spectroscopy /
- low-pressure /
- uranium hexafluoride /
- purity

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