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使用JMCT(J Monte Carlo Transport Code)对来自MIT的全堆芯pin-by-pin精细建模的国际基准模型BEAVRS的热零功率(HZP)状态进行了模拟计算,并与测试数据进行了对比和分析.比较的物理量包括临界本征值、控制棒价值、反应性温度系数、轴向积分的全堆探测器测量值和不同位置四个组件轴向相对功率密度分布.HZP状态下不同控制棒位置插入和硼浓度的临界本征值计算,JMCT结果与理论值1.000的误差小于0.2%,控制棒价值计算结果与测量值符合.JMCT对轴向积分的探测器径向相对功率分布和四个组件的轴向归一化的探测器的计算结果与测量值进行了比较和分析,计算结果与测量值一致,同时清晰地展示了模型增加格架后,轴向功率曲线在相应位置出现下凹的现象.此外,JMCT给出了轴向积分的组件径向相对功率密度分布和轴向相对功率最大处(Z轴位置)的pin径向相对功率密度分布,并与国际知名程序MC21结果进行了对比,两个图像都符合得非常好.随着计算机与并行计算的高速发展,蒙特卡罗程序开始从传统的反应堆校验工具向反应堆设计工具转变.
The hot zero-power (HZP) state of the BEAVRS, an international benchmark model for full core pin-by-pin modeling from MIT, was simulated using JMCT (J Monte Carlo Transport Code) and compared with the test data The comparison of physical quantities includes critical eigenvalues, control rod values, reactivity temperature coefficients, measurements of the full stack of axial integrals and axial relative power density distributions of the four components at different positions.HZP states of different control rod positions And the critical eigenvalue of boron concentration, the error between JMCT results and theoretical value of 1.000 is less than 0.2%, and the calculation results of the control rod values are in accordance with the measured values. The radial relative power distribution of JMCT to the axial integral detector and the four components Axial normalization detector calculated and measured values were compared and analyzed, the calculated results are consistent with the measured values, and clearly shows that the model increases the grid, the axial power curve in the corresponding position of the concave In addition, JMCT gives the radial relative power density distribution of the axially integrated components and the radial relative power density distribution of the pin at the maximum axial relative power (Z-axis position) The results of the well-known program MC21 are compared and both images are in good agreement.With the rapid development of computer and parallel computing, the Monte Carlo program has shifted from traditional reactor verification tools to reactor design tools.