基于中子倍增理论的反应堆物理启动分析

Analysis of Reactor Physical Start-up Based on Neutron Multiplication Theory

基于中子倍增理论,建立反应堆物理启动模型,对步距提棒过程进行数值模拟,并将计算结果与中子动力学方程的解进行对比;在此基础上,系统地分析次临界深度、提棒速度和提棒持续时间等因素对物理启动的影响。结果表明,在物理启动时需要特别注意反应堆的次临界深度。本文所得结论对反应堆的安全分析和控制运行有一定的理论意义和参考价值。

Based on the neutron multiplication theory, the physical start-up model is established. The processes of lifting control rod discontinuously are calculated by this model, and the results are compared with the analytic solution of the point-reactor kinetics. Based on this, the effects of sub-criticality, lifting control rod durations and speeds on the physical start-up are investigated, and it shows that the sub-criticality is an importance parameter in the physical start-up. The conclusions are very important to the safety analysis and operation of the ship nuclear reactors.