论文部分内容阅读
模块式高温气冷堆示范电站堆芯中子学仿真研究已成为当前一个重要课题,在三维圆柱几何堆芯中子时空动力学改进准静态方法的基础上,应用集总参数法建立了模块式高温气冷堆堆芯温度反馈的热工模型。将全堆划分为燃料颗粒、等效慢化剂和反射层3个区域,通过热工反馈求解反应性变化。在反应性扰动和冷却剂丧失情况下,模拟了反应性、堆内各区温度、各能群中子平均注量率以及相对功率等物理量随时间的变化。模拟结果与理论分析一致,初步实现了高温气冷堆的物理热工耦合。
Modular high temperature gas-cooled reactor demonstration power plant reactor core neutron simulation research has become an important issue at present. Based on the quasi-static method of three-dimensional cylindrical core geometry neutron spatiotemporal dynamics improvement, the lumped parameter method is used to establish a modular Thermal Model of High Temperature Gas - cooled Reactor Core Temperature Feedback. The whole pile is divided into three parts, ie, fuel particles, moderator and reflector, and the reactivity variation is solved by thermal feedback. In the case of reactive disturbance and loss of coolant, the changes of reactivity, the temperature in each region of the reactor, the average fluence rate of each group of neutrons, and the relative power and other physical quantities with time are simulated. The simulation results are consistent with the theoretical analysis, and the physical thermal coupling of the HTGR is initially achieved.