Synthesis of trevorite to capture Tc

Tsui, Colin

关键词: AR FACILITIES;    ELECTRONS;    EVAPORATION;    GLASS;    NITRATES;    RADIOACTIVE WASTES;    RETENTION;    RHENIUM;    SPECTROSCOPY;    SPINELS;    SYNTHESIS;    TECHNETIUM;    VITRIFICATION;    X-RAY DIFFRACTION;   

DOI  :  10.2172/1024548
RP-ID  :  PNNL-20701
PID  :  OSTI ID: 1024548
Others  :  Other: 830403000
Others  :  TRN: US1104783

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Spinel containing technetium can be used to prevent Tc volatilization during vitrification of radioactive waste. Spinel dissolves in glass at elevated temperatures. This study focuses on the synthesis of spinel and the retention of rhenium, a nonradioactive surrogate for Tc in the crystals. To produce trevorite, a nickel-iron spinel (NiFe2O4), Fe and Ni nitrates were mixed with alkali nitrates along with Al(OH)3 and heated to 500 to 800?��C. The trevorite content in samples (up to 40 mass%) was measured with x-ray diffraction. Viable samples were rerun with KReO4. Scanning electron microscopy-energy dispersive spectroscopy detected that Re became partly immobilized in spinel-forming crystals.