[1B03-06] Code Development 2

[1B06] Development of Core Management Code System SHIKOKU2

(2)Improvement of Neutron Transport Calculation Model

*Yosuke Kawamoto¹, Masami Hirano¹, Emi Yoshida¹, Kosuke Miyawaki¹, Kazuma Oohori², Yutaka Umakoshi² (1. Yonden Eng., 2. YONDEN)

Keywords:SHIKOKU2, ASMOC3D, Linear Source, Weighted Residual Method

SHIKOKU2 uses ASMOC3D as a transport calculation model. Previous ASMOC3D approximated the radial distribution of neutron source in the mesh to be flat. In this study, we improve ASMOC3D to expand that with a first-order polynomial. We perform core analysis using SHIKOKU2 after the model improvement, and we confirmed that the analysis accuracy is improved.