European Commission, Joint Research Centre, Directorate for Nuclear Safety and Security, D-76125 Karlsruhe, Germany.
Karlsruhe Institute for Technology, Institute for Nuclear Waste Disposal, D-76021 Karlsruhe, Germany.
Molecules. 2020 Mar 21;25(6):1429. doi: 10.3390/molecules25061429.
To reduce uncertainties in determining the source term and evolving condition of spent nuclear fuel is fundamental to the safety assessment. ß-emitting nuclides pose a challenging task for reliable, quantitative determination because both radiometric and mass spectrometric methodologies require prior chemical purification for the removal of interfering activity and isobars, respectively. A method for the determination of Sr at trace levels in nuclear spent fuel leachate samples without sophisticated and time-consuming procedures has been established. The analytical approach uses a commercially available automated pre-concentration device (SeaFAST) coupled to an ICP-DRC-MS. The method shows good performances with regard to reproducibility, precision, and LOD reducing the total time of analysis for each sample to 12.5 min. The comparison between the developed method and the classical radiochemical method shows a good agreement when taking into account the associated uncertainties.
为了降低确定乏核燃料源项和演化状态的不确定性，这是安全评估的基础。β放射性核素的可靠、定量测定是一项具有挑战性的任务，因为放射性测量和质谱测量方法都需要进行化学前处理，分别去除干扰活性和同量异位素。本文建立了一种无需复杂耗时程序即可测定核乏燃料浸出液样品中痕量锶的方法。该分析方法采用市售的自动预浓缩装置（SeaFAST）与电感耦合等离子体质谱（ICP-DRC-MS）联用。该方法在重复性、精密度和检出限方面表现良好，将每个样品的总分析时间缩短至 12.5 分钟。在考虑相关不确定性的情况下，与经典的放射化学方法相比，所开发的方法具有良好的一致性。
