Effects of heat treatments on the thermal diffusivity of Uranium-Molybdenum alloy

8th Brazilian Congress on Metrology

Camarano, D.M.^1 ; Mansur, F.A.^1 ; Santos, A.M.M.^1 ; Ferraz, W.B.^1 ; Pedrosa, T.A.^1

Nuclear Technology Development Center, CDTN, Belo Horizonte

MG

31270-901, Brazil^1

关键词: Effects of heat treatment;    High enriched uraniums;    Increasing temperatures;    Laser flash methods;    Low-enriched uranium;    Nuclear technology;    Research programs;    Thermal quadrupole methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012014/pdf
DOI  :  10.1088/1742-6596/733/1/012014

来源: IOP

【 摘 要 】

U-Mo alloys are the most investigated nuclear fuel material to be used in research reactors. The addition of molybdenum stabilizes the gamma phase of uranium and increases its melting point. A research program under development at Nuclear Technology Development Center (CDTN) aims the obtaining of uranium-molybdenum alloys to enable the high enriched uranium (HEU) to low enriched uranium (LEU) conversions. U-Mo ingots with 10% by weight were induction melted and heat treated at 300 °C for 72 h, 120 h and 240 h. Thermal diffusivity was determined by the laser flash method and thermal quadrupole method, from room temperature to 300 °C and 400°C. It was observed that the thermal diffusivity tends to increase with increasing temperature.