Methods and performance of a three-dimensional whole-core transport code DeCART
Methods and performance of a three-dimensional whole-core transport code DeCART
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发表时间：
2004-04
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通讯作者：
H. Joo;J. Cho;K. Kim;Chungchan Lee;S. Zee
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作者：
H. Joo;J. Cho;K. Kim;Chungchan Lee;S. Zee
DeCART是一个三维全堆芯输运程序，能够在发电条件下进行直接堆芯计算，而不涉及先验均匀化的少群常数生成。本文从整体上介绍了DeCART方法，包括平面特征线法（MOC）、基于单元的粗网格有限差分法（CMFD）、谐振处理的子群法和子针级热反馈法。从解决方案的精度和计算速度方面的代码的性能，然后检查使用的应用程序的C5G7MOX基准及其修改后的杆变分问题，也到一个三维的核心情况下，涉及热反馈。检查表明，准确的直接整个核心计算与子针级热反馈的实际PWR问题是很有可能负担得起的Linux集群在几个小时的时间跨度内。
DeCART is a three-dimensional whole-core transport code capable of performing direct core calculations at power generating conditions without involving a priori homogenized few-group constant generation. In this paper, the methods of DeCART, which are characterized by the planar method of characteristics (MOC) solutions, the cell based coarse mesh finite difference (CMFD) formulation, the subgroup method for resonance treatment and subpin level thermal feedback, are presented as a whole. The performance of the code from the aspect of solution accuracy and computing speed is then examined using the applications to the C5G7MOX benchmark and its modified rodded variation problems and also to a three-dimensional core case involving thermal feedback. The examination indicates that accurate direct whole core calculations with subpin level thermal feedback for practical PWR problems are quite possible on affordable LINUX clusters within a time span of a few hours.