富烧绿石人造岩石固化模拟锕系废物

Pyrochlore-rich Synroc for Immobilization of Actinides

采用国际上较少研究的烧绿石为主要矿相 ,针对分离的锕系核素进行人造岩石固化研究。设计并制备了对模拟锕系元素包容量为 4 6 8%的富烧绿石人造岩石固化体。对其物理性能、抗浸出性能、耐辐照性能和微观结构进行的研究结果表明 :富烧绿石人造岩石固化体具有很好的性能。

Pyrochlore rich synroc waste form with actinides waste loading 46.8 % is fabricated to evaluate its properties for containing actinides. Its physical properties, phase assemblages and microstructures are determined by using water immersion technique, vickers indentation technique, X ray diffraction(XRD), scanning electron microscope/energy dispersive spectrometer (SEM/EDS) and transmission electron microscopy/energy dispersive spectrometer (TEM/EDS). The durability test is carried out by using product consistency test (PCT) method, leachate is analyzed by using inductively coupled plasma/mass spectroscopy (ICP/MS) and atomic absorption spectroscopy(AAS). The radiation stability of pyrochlore phase is determined through heavy ion irradiation on tandem and characterized by XRD and TEM. The results indicate that pyrochlore rich synroc is a suitable host for separated actinides.