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栅格程序SONG的开发以各类新型反应堆的研发为主要目标,采用Stamm’ler方法和空间相关丹可夫(SDDM)方法进行共振计算,其共振计算模块在几何上具备对棒状和板状燃料元件的处理能力。Stamm’ler方法是基于等价理论的传统共振计算方法,该方法简单高效但无法考虑燃料元件内的精细空间自屏效应。SDDM方法在Stamm’ler方法基础上,进一步考虑燃料元件内不同区域的相关概率计算,实现了燃料元件内部空间相关共振自屏计算。现有Stamm’ler方法和SDDM方法相关理论均只针对棒状燃料元件,SONG程序中不仅实现了上述方法在棒状燃料中的应用,同时将其推广到板状燃料元件共振计算中,从而实现了多几何、多方法的共振计算模块。数值计算表明,SONG共振计算相关理论模型正确,共振计算精度满足要求。
The development of grid program SONG mainly focuses on the research and development of various types of new reactors. The Stammler method and SDDM method are used for resonance calculation. The resonance calculation module is geometrically equipped with rod-shaped and plate-shaped fuel Component handling capacity. The Stammler method is a traditional resonance calculation method based on equivalent theory that is simple and efficient but fails to account for the fine-space self-screen effect within the fuel element. Based on the Stammler method, the SDDM method further considers the correlation probability calculation of different regions within the fuel element to realize the self-screen calculation of the space-related resonance of the fuel element. The existing theories of Stammler method and SDDM method are only applied to the rod-shaped fuel element. The SONG program not only realizes the application of the above-mentioned method in the rod-shaped fuel, but also extends it to the resonance calculation of the plate-shaped fuel element to realize more Geometric, multi-method resonance calculation module. The numerical calculation shows that the theoretical model of SONG resonance calculation is correct and the calculation accuracy of resonance meets the requirements.