In the framework of the SELENIUM project, ZrN coated U-Mo fuel kernels were irradiated in the Belgium Reactor 2 of SCK•CEN to a plate average burnup of 48% ²³⁵U and a local maximum burnup just below 70% ²³⁵U. The microstructure and chemical composition of ZrN coating before and after neutron irradiation have been analysed using scanning transmission electron microscopy (STEM) equipped with energy dispersive X-ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS), and atom probe tomography (APT). The atomic ratio of N/Zr and fission product distribution determined by three techniques were compared and the combination of three techniques shows the advantages in characterization of chemical information for nuclear materials.

在SELENIUM项目的框架中，在SCK•CEN的比利时反应堆2中辐照了ZrN涂层的U-Mo燃料核，使板平均燃耗为48％²³⁵ U，局部最大燃耗仅低于70％^235U。使用配备有能量色散X射线能谱（EDS）和电子能量损失能谱（EELS）的扫描透射电子显微镜（STEM）以及原子探针层析成像（APT）分析了中子辐照前后ZrN涂层的化学成分和化学成分。比较了三种技术确定的N / Zr原子比和裂变产物分布，三种技术的结合显示了核材料化学信息表征的优势。