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首页> 外文会议>International conference on mathematics and computational methods applied to nuclear science and engineering >EFFICIENCY AND ACCURACY OF THE PERTURBATION RESPONSE COEFFICIENT GENERATION METHOD FOR WHOLE CORE COMET CALCULATIONS IN BWR AND CANDU CONFIGURATIONS
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EFFICIENCY AND ACCURACY OF THE PERTURBATION RESPONSE COEFFICIENT GENERATION METHOD FOR WHOLE CORE COMET CALCULATIONS IN BWR AND CANDU CONFIGURATIONS

机译：BWR和CANDU构型的全核彗星计算的扰动响应系数生成方法的效率和准确性

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摘要

The coarse mesh transport method (COMET) is a highly accurate and efficient computational tool which predicts whole-core neutronics behaviors for heterogeneous reactor cores via a pre-computed eigenvalue-dependent response coefficient (function) library. Recently, a high order perturbation method was developed to significantly improve the efficiency of the library generation method. In that work, the method's accuracy and efficiency was tested in a small PWR benchmark problem. This paper extends the application of the perturbation method to include problems typical of the other water reactor cores such as BWR and CANDU bundles. It is found that the response coefficients predicted by the perturbation method for typical BWR bundles agree very well with those directly computed by the Monte Carlo method. The average and maximum relative errors in the surface-to-surface response coefficients are 0.02%-0.05% and 0.06%-0.25%, respectively. For CANDU bundles, the corresponding quantities are 0.01%-0.05% and 0.04% -0.15%. It is concluded that the perturbation method is highly accurate and efficient with a wide range of applicability.
机译：粗网格传输方法（COMET）是一种高度准确，高效的计算工具，它可以通过预先计算的与特征值相关的响应系数（函数）库来预测异构反应堆堆芯的全核中子学行为。最近，开发了一种高阶扰动方法来显着提高库生成方法的效率。在这项工作中，在一个小的PWR基准问题中测试了该方法的准确性和效率。本文将摄动法的应用范围扩展到包括其他水反应堆堆芯（例如BWR和CANDU束）所特有的问题。发现通过扰动方法预测的典型BWR束的响应系数与通过蒙特卡洛方法直接计算的响应系数非常吻合。表面对表面响应系数的平均和最大相对误差分别为0.02％-0.05％和0.06％-0.25％。对于CANDU束，相应的数量为0.01％-0.05％和0.04％-0.15％。得出的结论是，该摄动方法具有很高的准确度和效率，并具有广泛的适用性。

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