中子传输矩阵研究

通过简化假设,分析了中子传输矩阵的物理意义,推导出中子传输矩阵数学模型,并利用以往的数据进行了验证.同时根据矩阵的共轭梯度算法理论,研究利用堆外核探测器系统(RPN)的功率量程通道(PRC)6节电离室信号及堆内中子通量测量系统(RIC)获得的堆内通量分布信号计算中子传输矩阵的方法.这种算法得到的中子传输矩阵,可以植入冷却剂丧失(LOCA)监测系统(LSS系统);通过LSS系统可以实时监测堆芯轴向功率分布,进而监测堆芯轴向线功率密度.

Study on Neutron Transfer Matrix

The physical principle of the neutron transfer matrix is presented on the basis of simplified hypothesis, and then a simple mathematical model is induced. According to this model, the conjugate gradient theorem of matrices is introduced to explore a method of calibration this matrix from the signals by R/C system and RPN system. This method indicates that the model induced in this paper is reasonable and practicable. The neutron transfer matrix calculated by the method explored in this paper, can be implanted into the LOCA surveillance system (LSS), and the axial power distribution and the axial power density of the reactor processed by the LSS can be displayed on real time.