Verification of 3D Heterogeneous Core Transport Calculation Utilizing Non-linear Iteration Technique
Verification of 3D Heterogeneous Core Transport Calculation Utilizing Non-linear Iteration Technique
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DOI：
10.1080/18811248.2004.9715529
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发表时间：
2004-06
影响因子：
1.2
通讯作者：
S. Kosaka;T. Takeda
中科院分区：
文献类型：
--
作者：
S. Kosaka;T. Takeda
开发了基于确定性方法的三维非均质岩心输运分析程序CHAPLET-3D。CHAPLET-3D代码采用先进节点扩散代码中常用的非线性迭代技术，以传统有限差分法的形式进行三维非均质核计算，具有径向二维几何特征法的精度。对于轴向求解，除了扩散理论中的有限差分法和节点展开法外，还引入了特征法，以考虑输运效应。通过与多组蒙特卡罗参考计算结果的对比验证试验，发现CHAPLET-3D三维非均匀岩心分析的精度与参考计算的精度几乎相同，也证明了本文所介绍的利用非线性迭代技术的三维岩心分析方法的有效性和实用性。
A three dimensional heterogeneous core transport analysis code CHAPLET-3D which is based on deterministic methods has been developed. In CHAPLET-3D code the non-linear iteration technique which is commonly used in advanced nodal diffusion codes is employed to perform three dimensional heterogeneous core calculation in a form of conventional finite difference method with the accuracy of the method of characteristics in radial two dimensional geometry. For an axial direction solver in addition to finite difference method and nodal expansion method in diffusion theory the method of characteristics has been incorporated in order to take account of transport effect. According to the verification tests compared with the results of multi-group Monte Carlo reference calculations it is found that the accuracy of CHAPLET-3D code for three dimensional heterogeneous core analysis is almost the same level as that of the reference calculation and also demonstrated that the three dimensional core analysis method utilizing the non-linear iteration technique introduced here is valid and useful.