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首页> 外文期刊>Annals of nuclear energy >Physical probability table applied to response matrix-collision probability method for direct whole-core transport calculations
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Physical probability table applied to response matrix-collision probability method for direct whole-core transport calculations

机译:物理概率表应用于响应矩阵碰撞概率方法的直接全核传输计算

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摘要

In this study, we applied physical probability table to response matrix-collision probability method to treat and evaluate self-shielded resonance cross-sections for whole-core transport calculations. To attain accurate results, especially in resonance treatment, the conservation laws of probabilities are derived and satisfied using HELIOS normalization scheme. The subgroup weights are efficiently evaluated using the conjugate gradient method based on the normal equations (CGNR). The resonance interference effects are considered. We used Segev method to interpolate the resonance integrals (RIs), in order to accurately obtain the subgroup weights. Finally, a validation is presented where the effective absorption and production cross-sections and the infinite multiplication factors are compared with exact values obtained using NJOY and the equivalence theory for homogeneous media. Other results, such as the Rowland's benchmark for three assembly production cases, are also presented and compared with those produced by Monte Carlo method. The results indicate the developed method can accurately represent the self shielding effects. (C) 2015 Elsevier Ltd. All rights reserved.
机译:在这项研究中,我们将物理概率表应用于响应矩阵碰撞概率方法,以处理和评估自屏蔽共振截面,以进行全芯输运计算。为了获得准确的结果,尤其是在共振治疗中,使用HELIOS归一化方案推导并满足了概率守恒律。使用基于正态方程(CGNR)的共轭梯度法可以有效地评估子组权重。考虑了共振干扰效应。我们使用Segev方法对共振积分(RI)进行插值,以准确获得子组权重。最后,提出了一个验证,将有效吸收和生产截面以及无限乘数与使用NJOY和均质介质的等效理论获得的精确值进行比较。还介绍了其他结果,例如罗兰(Rowland)在三个装配生产案例中的基准测试,并将这些结果与蒙特卡洛方法产生的结果进行了比较。结果表明所开发的方法可以准确地表示自屏蔽效果。 (C)2015 Elsevier Ltd.保留所有权利。

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