论文标题
斑核链反应
Patchy nuclear chain reactions
论文作者
论文摘要
核反应堆中的中子种群的随机波动通常通过足够的功率操作核心来阻止，因为自动安全系统要求中子种群的确定性行为来检测不必要的功率偏移。然而，最近的作品指出，在特定情况下，非波斯顿的模式可能会影响中子空间分布。这促使国际计划在2017年在Rensselaer理工研究所反应堆关键设施进行实验检测和表征这种波动和相关性。该程序的主要发现确实将在中子空间分布的快照中揭示斑点，并以专用的反应器数值双胞胎获得 - 支持“中子聚类”现象的第一个实验表征，而基于反应 - 延伸过程和分支随机步行的随机模型会揭示出键作用的反应式反应器中的反应器中的反应式启动，以启用反应式启动的反应剂，以启用反应器的反应器源源源源源源源源是源源。
Stochastic fluctuations of the neutron population within a nuclear reactor are typically prevented by operating the core at a sufficient power, since a deterministic behavior of the neutron population is required by automatic safety systems to detect unwanted power excursions. Recent works however pointed out that, under specific circumstances, non-Poissonian patterns could affect neutron spatial distributions. This motivated an international program to experimentally detect and characterize such fluctuations and correlations, which took place in 2017 at the Rensselaer Polytechnic Institute Reactor Critical Facility. The main findings of this program will indeed unveil patchiness in snapshots of neutron spatial distributions -- obtained with a dedicated numerical twin of the reactor -- that support this first experimental characterization of the 'neutron clustering' phenomenon, while a stochastic model based on reaction-diffusion processes and branching random walks will reveal the key role played by the reactor intrinsic sources in understanding neutron spatial correlations.
