A simple approximation to estimate the reactor period in critical assemblies

Francisco J. Souto

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A simple approximation to estimate the reactor period in critical assemblies

机译：一个简单的近似值来估算关键组件中的反应堆周期

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A simple approximation is proposed to estimate the reactor period in critical assemblies for which the reactivity parameters, such as the fissile material, neutron-energy spectrum, and effective fraction of delayed neutrons, are characterized. This approximation is based on the period-reactivity equation, in combination with the delayed-neutron parameters corresponding to the fissile material and neutron-energy spectrum of the critical assembly, and Monte Carlo computer-code calculations of the criticality factor, prompt-neutron lifetime, and average number of neutrons per fission. The proposed approximation is validated with experimental results for the Lady Godiva fast metal and the Solution-High Energy Burst Assembly (SHEBA) thermal solution critical assemblies that operated at Los Alamos National Laboratory. In addition, the results of the approximation are also compared with those reported for experiments conducted at the Kyoto University Critical Assembly. The results from this analysis indicate that the proposed approximation can be used to estimate the reactor period in critical assemblies.

机译：提出了一种简单的近似方法来估计关键组件中的反应堆周期，对于这些组件，其反应性参数（例如裂变材料，中子能谱和延迟中子的有效分数）具有特征。该近似值基于周期反应方程式，结合了与临界组件的易裂变材料和中子能谱相对应的延迟中子参数，以及临界因子，中子迅速寿命的蒙特卡洛计算机代码计算，以及每个裂变的平均中子数。拟议的近似值已在洛斯阿拉莫斯国家实验室操作的Lady Godiva快熔金属和溶液-高能爆裂组件（SHEBA）热溶液关键组件的实验结果中得到验证。此外，还将近似结果与在京都大学评论委员会进行的实验报告的结果进行比较。分析的结果表明，建议的近似值可用于估算关键组件中的反应堆周期。

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《Annals of nuclear energy》 |2007年第4期|p.241-247|共7页
作者
Francisco J. Souto;
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Los Alamos National Laboratory, Applied Physics Division, MS T086, P.O. Box 1663, Los Alamos, NM 87545, USA;

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正文语种 eng
中图分类原子能技术;
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A simple approximation to estimate the reactor period in critical assemblies

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