SNRE堆芯物理计算分析

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Core Physics Calculation and Analysis for SNRE

1. Department of Engineering Physics, Tsinghua University, Beijing, 10084, China;
2. Department of Reactor Engineering Research and Design, China Institute of Atomic Energy, Beijing, 102413, China

摘要: 采用蒙特卡罗方法的MCNP程序对小型核火箭发动机(SNRE)的堆芯建立了5个不同精细程度的计算模型,并对其有效增殖因子、转鼓价值和功率分布进行了计算。模型分析结果表明:元件均匀化处理可以满足一般的反应性计算,而要得到元件内部功率分布则必须采用精细描述元件的模型。参数计算结果表明:SNRE堆芯基本物理特性合理,转鼓控制价值足够,功率分布均匀合理,满足设计要求。
- 小型核火箭发动机(SNRE) /
- MCNP /
- 堆芯物理计算模型
Abstract: Five different precise calculation models have been set up for Small Nuclear Rocket Engine（SNRE） core based on MCNP code,and then the effective multiplication constant,drum control worth and power distribution were calculated.The results from different models indicate that the model in which elements are homogeneous could be used in the reactivity calculation,but a detailed description of elements have to be used in the element internal power distribution calculation.The results of physics parameters show that the basic characteristics of SNRE are reasonable.The drum control worth is sufficient.The power distribution is symmetrical and reasonable.All of the parameters can satisfy the design requirement.
- Small Nuclear Rocket Engine（SNRE） /
- MCNP /
- Core physics calculation model