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首页> 外文期刊>Annals of nuclear energy >BWR stability and bifurcation analysis using reduced order models and system codes: Identification of a subcritical Hopf bifurcation using RAMONA
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BWR stability and bifurcation analysis using reduced order models and system codes: Identification of a subcritical Hopf bifurcation using RAMONA

机译：使用降阶模型和系统代码进行 BWR 稳定性和分岔分析：使用 RAMONA 识别亚临界 Hopf 分岔

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摘要

The system code RAMONA, as well as a recently developed BWR reduced order model (ROM), are employed for the stability analysis of a specific operational point of the Leibstadt nuclear power plant. This has been done in order to assess the ROM's applicability and limitations in a quantitative manner. In the context of a detailed local bifurcation analysis carried out using RAMONA in the neighbourhood of the chosen Leibstadt operational point, a bridge is built between the ROM and the system code. This has been achieved through interpreting RAMONA solutions on the basis of the physical mechanisms identified in the course of applying the ROM. This leads, for the first time, to the identification of a subcritical Poincare-Andronov-Hopf (PAH) bifurcation using a system code. As a consequence, the possibility of the so-called correspondence hypothesis is suggested to underline the relationship between a stable (unstable) limit cycle solution and the occurrence of a supercritical (subcritical) PAH bifurcation in the modeling of boiling water reactor stability behaviour.
机译：系统代码RAMONA以及最近开发的BWR降阶模型（ROM）用于莱布施塔特核电站特定运行点的稳定性分析。这样做是为了以定量的方式评估ROM的适用性和局限性。在选定的莱布施塔特操作点附近使用RAMONA进行详细的局部分岔分析时，在ROM和系统代码之间架起了一座桥梁。这是通过在应用ROM过程中确定的物理机制来解释RAMONA解决方案来实现的。这首次导致使用系统代码识别亚临界庞加莱-安德罗诺夫-霍普夫（PAH）分岔。因此，在沸水反应堆稳定性行为建模中，提出了所谓的对应假设的可能性，以强调稳定（不稳定）极限循环解与超临界（亚临界）PAH分岔发生之间的关系。

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