Development of Discrete Ordinates SN Code in Three-Dimensional (X, Y, Z) Geometry for Shielding Design
Development of Discrete Ordinates SN Code in Three-Dimensional (X, Y, Z) Geometry for Shielding Design
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DOI：
10.3327/jnst.17.539
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发表时间：
1980-07
影响因子：
1.2
通讯作者：
Nishimura Tatsuo;Keiko Tada;H. Yokobori;Akira Sugawara
中科院分区：
文献类型：
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作者：
Nishimura Tatsuo;Keiko Tada;H. Yokobori;Akira Sugawara
本文发展了一个（X，Y，Z）几何中的离散坐标输运程序ENSEMBLE，用于三维几何中的屏蔽计算。与目前唯一的THREETRAN程序相比，该程序具有一些上级特点。也就是说，该代码可以处理高阶各向异性散射，并采用粗网格重新平衡方法。此外，它还具有使用变权菱形差分方程方案的负通量修正程序，以及使用基于SN→PN-1转换技术的虚拟源的射线效应修正选项。这些先进的功能在三维空间中的配方已经推导出来。作为演示的能力的代码，几个数值分析和分析的环形管道流动实验在日本原子能研究所的JRR-4，已进行。通过这些分析，证实了ENSEMBLE在实际屏蔽工程中的适用性的前景。
A discrete ordinates transport code ENSEMBLE in (X, Y, Z) geometry has been developed for the purpose of shielding calculations in three-dimensional geometry. The code has some superior features, compared with THREETRAN which is the only code of the same kind so far developed. That is, the code can treat higher order anisotropic scattering and employs a coarse mesh rebalancing method. Moreover it has a negative flux fix-up routine using a variable weight diamond difference equation scheme and has a ray-effect fix-up option using a fictitious source based on SN→PN-1 conversion technique. Formulations for these advanced features in three-dimensional space have been derived. As the demonstration of the capabilities of the code, several numerical analyses and an analysis of an annular duct streaming experiment in JRR-4 at Japan Atomic Energy Research Institute, have been performed. As a result of these analyses, confirmation has been obtained for the prospect of applicability of ENSEMBLE to practical shieldin...