船用核动力装置给水减少事件分析与处置研究

从船用核动力装置蒸汽发生器给水减少事件出发,建立事件树分析模型,在保证核安全的前提下,以确保反应堆不停堆为约束条件,运用Relap5/Mod3程序对事件演变过程中的热工水力参数进行计算分析,筛选出在不同运行条件下处理该事件的最佳方案。分析结果表明,在反应堆低功率运行时,并不是所用的给水减少均会造成反应堆停堆,存在最佳的处理方案及相对较长的处置时间用以恢复反应堆及蒸汽发生器的正常运行状态。

Calculating analysis and disposition research of event of steam generator feedwater loss of marine nuclear power plant

ETA(event tree analysis)model is developed on the basis of the event of steam generator feedwater loss of marine nuclear power plant. Thermal hydraulic parameters for the development of events are calculated and analyzed with the program Relap5/Mod3 on the premise of nuclear safety and no shutdown for reactor. Optimum disposing measure is selected under different operational circumstances. The analysis results indicate that not all the events of feedwater loss could result in shutdown under the circumstance of lower power, and the optimum disposing measure and relatively ample disposing time exist, which can be used to recover the natural operational state of the reactor and steam generator.