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首页> 外文期刊>Annals of nuclear energy >Multi-layer models to neutron reflection and transmission for whole-core transport calculations
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Multi-layer models to neutron reflection and transmission for whole-core transport calculations

机译：用于中子反射和传输的多层模型，用于全核传输

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摘要

The aim of this article is to provide mathematical models to neutron reflection by and transmission through multi-layered boundary regions for whole nuclear reactor core transport calculations. A multi-layered boundary region is to be understood here as a region consisting of two or more contiguous and disjoint uniform layers of nonactive (nonfissionable) material surrounding the active (fissionable) region of a nuclear reactor core, e.g. the baffle-reflector region of a pressurized water reactor core. We firstly consider a two-layered boundary region and we develop for such a region mathematical models to the diffuse reflection and transmission of neutrons in the discrete ordinates formulation of neutron transport theory for one-speed slab-geometry nuclear reactor core problems with anisotropic scattering. We then perform numerical experiments in order to show that our models to neutron reflection and transmission can be used to replace efficiently and accurately two nonactive boundary layers in whole-core transport calculations. We conclude by showing how the theory can be extended to include an arbitrary number of boundary layers and by reporting ongoing research.
机译：本文的目的是为整个核反应堆堆芯输运计算提供多层边界区域的中子反射和传输的数学模型。多层边界区域在本文中应理解为由两个或更多个连续的且不相交的均匀层的非活性（不可裂变）材料组成的区域，它们围绕着核反应堆堆芯的活性（可裂变）区域。压水堆堆芯的挡板反射器区域。我们首先考虑一个两层边界区域，并针对中子输运理论的单轴平板几何核反应堆具有各向异性散射问题的离散纵坐标公式，针对中子的漫反射和透射建立了这样的区域数学模型。然后，我们进行数值实验，以表明我们的中子反射和传输模型可以用于在全芯输运计算中高效，准确地替换两个非活动边界层。我们通过展示如何扩展理论以包括任意数量的边界层并报告正在进行的研究来得出结论。

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  • 来源
    《Annals of nuclear energy》 |2005年第2期|p.215-231|共17页
  • 作者

    Marcos Pimenta de Abreu;

  • 作者单位

    Departamento de Modelagem Computational, Instituto Politecnico (IPRJ), Universidade do Estado do Rio de Janeiro (UERJ), Caixa Postal 97282, Nova Friburgo, RJ 28601-970, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子能技术;
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