[1F11-14] Aqueous Processing and Related Technologies

[1F11] Development of FBR Fuel Assembly Disassembly and Fuel Pin Bundle Shearing Technology

(16)Study of Disassembling Cutting Mechanism by CBN Grinding Wheel

*Hidetsugu Nishikawa¹, Masayuki Takeuchi², Toru Kitagaki², Yuuichi Tooya³, Isamu Sato¹ (1. Tokyo City Univ., 2. JAEA, 3. MHI)

Keywords:Fast reactor fuel assembly, Disassembly, Mechanical cutting, Cubic Boron Nitride grinding wheel, Wrapper tube, Grinding ratio, Grinding resistance

Based on the results of the mechanical cutting test using a Cubic Boron Nitride (CBN) grinding wheel as the cutting tool, the disassembling and cutting mechanism of the CBN grinding wheel in the cutting of the wrapper tube and the fuel pin was examined from the relationship between the cutting progress of the CBN grinding wheel and the current of the cutting rotary motor and the grinding ratio (Grinded test piece volume/worn grinding wheel volume).