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为了精确描述和分析具有强烈各向异性中子注量率空间分布的反应堆燃耗过程,本文实现了三维SN输运计算与燃耗计算的耦合,发展了相应的三维输运燃耗耦合计算程序。该程序系统采用接口程序自动耦合三维SN输运计算程序和同位素燃耗计算程序的方法实现对三维中子学计算模型的精细燃耗计算,获得燃料同位素成分、燃耗反应性、中子注量率空间分布等参数随燃耗时间的变化量。采用IAEA基准校核例题对程序系统进行了校核,计算结果初步证明了所开发的三维燃耗程序系统的正确性。
In order to accurately describe and analyze the reactor burnup process with a strongly anisotropic neutron fluence distribution, this paper realizes the coupling of three-dimensional SN transport calculation and fuel consumption calculation, and develops the corresponding three-dimensional transport burnup coupling calculation program . The program uses the interface program to automatically coupled 3D SN transport calculation program and isotope fuel burn calculation program to calculate the fine fuel consumption of the three-dimensional neutronics calculation model, to obtain the fuel isotope composition, fuel consumption reactivity, neutron flux Rate of spatial distribution and other parameters with the change of fuel consumption time. The IAEA benchmarking program was used to check the program system. The calculation results proves the correctness of the developed system.