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堆内特殊材料辐射发热率计算研究
Research on in-core special material heating rate calculation
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摘要: 辐射发热率是灰棒等堆内特殊材料性能研究、热工安全分析和力学分析的重要输入参数，因此堆内特殊材料的辐射发热率评估是新型堆内材料研究的重点内容之一。为了提高中子和光子辐射发热率的计算精度，开发了蒙特卡罗(MC)程序源项子程序，制作了堆内特殊材料截面参数，建立了CAP1400计算模型，采用三维蒙特卡罗程序模拟计算特殊材料在 CAP1400堆内的辐射发热率。MC 程序能够更加精确地计算出CAP1400堆内特殊材料的辐射发热率，而且能够给出辐射发热率的空间分布，从而更好地支持堆内特殊材料相关的灰棒等部件的国产自主化设计。Abstract: Radiation heating rate is one of the important input data for the performance research,thermal hydraulic and me-chanical analysis of in-core special materials such as gray rods,therefore evaluation of radiation heating rate of in-core special ma-terials is important for the research of new in-core materials.In order to improve the calculation precision of neutron and photon radiation heating rates,we developed a source code for a 3D Monte Carlo(MC)code,produced cross sections of special materials, established CAP1400 model,simulated and calculated radiation heating rate of special materials in CAP1400 by using MC code. The MC code calculates the radiation heating rate of special materials in CAP1400 more accurately,and it can give radiation heat-ing rate distribution,which supports domestic design of in-core special materials such as gray rods and related components.
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