In pyroprocessing, uranium (U) is recovered from molten LiCl–KCl salt, and, for safeguard purposes, it is important to analyze the U and Plutonium (Pu) concentrations in a timely manner. In the present work, salt samples containing U were fabricated. The laser used in the present work was an Nd:YAG laser with a wavelength of 532 nm, a laser energy on the sample of 11.5 mJ, and a pulse repetition rate of 10 Hz. The plasma emission light was measured with an Echelle spectrometer. A total of 100 points on the sample surface were measured as the laser incident position was changed. The U and potassium (K) peaks in the spectrum were identified. Univariate and multivariate analyzes were conducted to determine the accuracy and limit of detection (LOD) of the laser-induced breakdown spectroscopy.

中文翻译：

---

用激光诱导击穿光谱法测定热加工氯化锂-氯化钾盐中的铀

在热解过程中，从熔融的LiCl–KCl盐中回收铀（U），出于安全起见，及时分析U和P（Pu）的浓度非常重要。在目前的工作中，制备了含U的盐样品。在本工作中使用的激光器是Nd：YAG激光器，其波长为532 nm，样品上的激光能量为11.5 mJ，脉冲重复频率为10 Hz。用Echelle光谱仪测量等离子体发射光。当改变激光入射位置时，在样品表面上总共测量了100个点。确定了光谱中的U和钾（K）峰。进行了单因素和多因素分析，以确定激光诱导击穿光谱的准确性和检测极限（LOD）。