新しい格子モデルによるDIMOSコードと3次元中性子ダクトストリーミングの解析

概要

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This paper describes the development of a design-oriented three dimensional stochastic neutron transport code with a new lattice model for shielding analysis. The basic assumption of this lattice model is that neutron motion may be sampled at predetermined points. A medium is considered to be filled with a cubic lattice. The number of allowed directions of motion is revised from 26 in the old lattice model to 98 in the new one. By using the lattice model, a computer code named DIMOS has been developed on the basis of a stochastic approach. In addition, this code has an option coupling the two-dimensional discrete ordinates code PALLAS with the DIMOS code. In order to demonstrate the ability of this code, three neutron streaming problems were calculated with the option of coupling in the DIMOS: a cylindrical air duct in water, a straight annular duct in an unsymmetrical configuration and an annular duct with the one bend. Results obtained are in good agreement experimental ones.
独立行政法人海上技術安全研究所の論文
1981-11-30