Phillips William C, Gakhar Ruchi, Horne Gregory P, Layne Bobby, Iwamatsu Kazuhiro, Ramos-Ballesteros Alejandro, Shaltry Michael R, LaVerne Jay A, Pimblott Simon M, Wishart James F
Pyrochemistry and Molten Salt Systems Department, Idaho National Laboratory, Idaho Falls, Idaho 83402, USA.
Aqueous Separations and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho 83402, USA.
Rev Sci Instrum. 2020 Aug 1;91(8):083105. doi: 10.1063/1.5140463.
To facilitate the development of molten salt reactor technologies, a fundamental understanding of the physical and chemical properties of molten salts under the combined conditions of high temperature and intense radiation fields is necessary. Optical spectroscopic (UV-Vis-near IR) and electrochemical techniques are powerful analytical tools to probe molecular structure, speciation, thermodynamics, and kinetics of solution dynamics. Here, we report the design and fabrication of three custom-made apparatus: (i) a multi-port spectroelectrochemical furnace equipped with optical spectroscopic and electrochemical instrumentation, (ii) a high-temperature cell holder for time-resolved optical detection of radiolytic transients in molten salts, and (iii) a miniaturized spectroscopy furnace for the investigation of steady-state electron beam effects on molten salt speciation and composition by optical spectroscopy. Initial results obtained with the spectroelectrochemical furnace (i) and high-temperature cell holder (ii) are reported.
为推动熔盐反应堆技术的发展，有必要深入了解高温和强辐射场联合条件下熔盐的物理和化学性质。光学光谱（紫外-可见-近红外）和电化学技术是探测溶液动力学的分子结构、形态、热力学和动力学的强大分析工具。在此，我们报告了三种定制仪器的设计与制造：（i）配备光学光谱和电化学仪器的多端口光谱电化学炉，（ii）用于时间分辨光学检测熔盐中辐射分解瞬态的高温电池支架，以及（iii）用于通过光谱研究稳态电子束对熔盐形态和组成影响的小型化光谱炉。报告了使用光谱电化学炉（i）和高温电池支架（ii）获得的初步结果。
