Shinya ISHIDA1*, Hiroshi SEKIMOTO1, Kenji NISHIHARA2, and Hiroyuki OIGAWA21Tokyo Institute of Technology., N1-17, 2-12-1, Ookayama, Meguro-ku, Tokyo-to, 152-8550 JAPAN2Japan Atomic Energy Agency., 2-4 Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195*E-mail: ishida.s.aa@m.titech.ac.jp Since Analysis of ADS required a great deal of time, asimple analysis method is proposed with a simple ADS model. The difference between a detail model (aheterogeneous hexagon lattice model) and simple models (a homogeneous hexagon lattice model and acylindrical model), and the difference between a detail method (the continuous energy Monte Carlo calculations)and a simple method (the diffusion calculation) are investigated. The difference of a fission reaction ratebetween the models was 10% on average, and the difference of a fission reaction rate between the methods was5% on average. When the simple method was used, wrong results are obtained for very lower (or higher) densityregion than the others.Keywords: ADS, heterogeneous, homogeneous, cylinder, Monte Carlo calculations, diffusion calculations
