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重水动力堆的装换料是在带功率下进行的、相邻管道换料方向相反的双向连续换料。用有限元法编制了三维二群中子扩散堆芯燃料管理程序,给出中子通量分布、功率分布、燃料束的比燃耗分布,有效增殖系数,吸收棒、点火棒和水位的效应,管道温升和管道流量以及其它关心的物理量。使用任意三棱柱元素和四棱柱元素,较真实地模拟反应堆边界。网格的剖分采用自动和人工相结合。程序既有自动装换料的功能,又有人工装换料的功能;为了使它有广泛的适应性,还特别设置了从辐照过的堆芯转变为另一种特定堆芯,并重新开始计算的功能。它可综合模拟堆芯运行和燃料管理。采用源迭代和切比雪夫加速收敛技巧使程序精度高,运算速度快。用3D-IAEA和3DPHWR对程序进行了考核,达到了预期的效果。
Heavy water power reactor refueling is carried out with the power, the adjacent pipe refueling direction reversal bidirectional continuous refueling. The three-dimensional two-group neutron diffusion core fuel management program was prepared by finite element method. The effects of neutron flux distribution, power distribution, fuel burn distribution, effective multiplication factor, absorption rods, ignition rods and water level , Pipe temperature rise and pipe flow, and other physical quantities of concern. Use any Triangular Prism and Tetragonal Prism element to simulate the reactor boundary more faithfully. Mesh segmentation using automatic and manual combination. The program has the function of automatic refueling and manual refueling. In order to make it adaptable to a wide range of applications, it has also been specially set up to change from the irradiated core to another specific core and restart Calculated function. It is a comprehensive simulation of core operations and fuel management. Using source iteration and Chebyshev acceleration convergence techniques make the program highly accurate and computationally fast. With 3D-IAEA and 3DPHWR procedures for the assessment, to achieve the desired results.