[2M10-15] Code Development and Varidation

[2M12] Development of Mitsubishi Three-Dimensional Heterogeneous Transport Calculation Code GALAXY-Z

(1) Overview and basic methodology

*KAZUYA YAMAJI¹, Kazuki Kirimura¹, Yohei Kamiyama¹, Yuki Takemoto¹, Daisuke Sato¹ (1. Mitsubishi Heavy Industries, Ltd.)

Keywords:Three-dimensional heterogeneous transport calculation, Planar method of characteristics (MOC), Axial MOC, GALAXY

MHI has been developing the three-dimensional heterogeneous transport calculation code GALAXY-Z. GALAXY-Z uses planar MOC as neutron solver. In the radial direction, the two-dimensional MOC code GALAXY is used. In the axial direction, one-dimensional MOC is applied for accurate treatment of heterogeneity caused by control rod insertion and void production in moderator.