[2J13-17] Analysis Code Development 1

[2J15] Development of Mitsubishi Three-Dimensional Heterogeneous Transport Calculation Code GALAXY-Z

(3) Transverse Leakage Approximation using Angular Flux

*Kazuya Yamaji¹, Koichi Ieyama¹, Hiroki Koike¹, Daisuke Sato¹ (1. Mitsubishi Heavy Industries, Ltd.)

Keywords:Three-dimensional heterogeneous transport calculation,, Planar MOC, GALAXY-Z, Transverse leakage, Angular flux

MHI is developing the three-dimensional heterogeneous transport calculation code GALAXY-Z based on planar MOC. In order to improve calculation accuracy of GALAXY-Z in large neutron streaming geometries, the angular–flux-based transverse leakage approximation is applied to GALAXY-Z. We confirmed that the angular–flux-based transverse leakage approximation can well predict reference Monte-Carlo code results in comparison with the conventional current-based transverse leakage approximation through the TAKEDA benchmark calculations.