CFETR集成设计平台的核热耦合模块开发

摘要

正在研发的中国聚变工程实验堆(China Fusion Engineering Test Reactor,CFETR)集成设计平台包括物理设计平台和工程设计平台,工程设计平台采用模块化方式,包括磁体、真空室、偏滤器、中子学等模块.模块设计中涉及用计算流体动力学(Computational Fluid Dynamics,CFD)软件来对堆内部件开展热工水力分析,CFD的热源项包括中子学计算产生的核热,而中子学分析软件(如Monte Carlo N particle transport code,MCNP)核热输出结果文件存在CFD软件无法直接读取等问题.因此,基于网格-网格插值和点-点插值法,开发了中子学与CFD核热耦合模块,提供两种途径实现高精度的三维核热耦合.使用CFX软件,以CFETR的一种氦冷陶瓷包层(Helium Cooled Ceramic Breeder blanket,HCCB)中增殖单元模块为对象,进行了热工水力分析,计算结果表明了核热耦合模块功能的可靠性.%[Background] The China fusion engineering test reactor (CFETR) under development, mainly consists of a physical design platform and an engineering design platform, and the latter includes various modules. In the design of the modules, computational fluid dynamics (CFD) software is used for thermal-hydraulic analysis of the fusion in-vessel components of which the nuclear heating is a necessary source term generated from neutronics calculations of Monte Carlo N particle transport code (MCNP). [Purpose] This study aims to transfer the 3D nuclear heating profiles from MCNP to CFD software and develop neutronics-thermal hydraulics coupling module for CFETR integration design platform. [Methods] The 3D nuclear heating profiles were processed by two different interpolation methods: element-to-element mapping method and point-to-point mapping method, and the 1D nuclear heating profiles were also processed for comparison. Thermal-hydraulic analysis based on breeder unit of the helium cooled ceramic breeder blanket (HCCB) for CFETR was performed on ANSYS CFX for verification. The total interpolated nuclear heating, heating distributions and temperature distributions were compared in detail according to the CFX simulation results. [Results] Comparison results showed that all schemes satisfied the conservation of nuclear heating with appropriate mesh. Element-to-element mapping method and point-to-point mapping method differs in the heating peak value due to the different interpolation method. [Conclusion] The neutronics-thermal hydraulics coupling module proposed in this paper possesses high reliability for CFETR integration design platform.