Development of simplified pelletizing process for fast reactor MOX fuels and demonstration experiment, 1; Advanced technology of microwave heating denitration method

Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Tsuchida, Hayahisa*; Fujiwara, Kota*; Kaneko, Akiko*; Abe, Yutaka*

no journal, , 

Development and demonstration of elemental technologies in simplified pellet fabrication method are developed. While the cylindrical vessel is expected to have a higher speed and capacity than the flat vessel, spilling phenomenon occurs, and device design optimization is required. The mechanism of flashing and spilling, and microwave heating characteristics of high loss solution are studied. The progress of the development of elemental technologies and microwave heating test results using simulated reprocessed solutions are reported. The dielectric loss of distilled water increased from the lower end to near the central axis, and water was internally heated, and then strong convection currents were formed with a large velocity vector from the center upward. In contrast, in KCl solution with 10 mass%, which has the same dielectric loss rate as the reprocessed solution, the outer periphery was heated and large convection was hardly generated, suggesting that heating is non-uniform.