介绍反应堆物理实验微观噪声分析中的Rossi-α方法,并将其应用于次临界装置的动态参数α本征值的测量研究。在极低中子通量密度状态下对清华大学反应堆物理实验室次临界装置的α本征值进行测量,同时采用外推方法得到了临界时的本征值αc;采用蒙特卡罗程序(MCNP)和三维蒙卡瞬态程序(TMCC)对该装置的α本征值进行了相应的理论计算。将实验测量和理论计算进行相互校验,两者结果符合很好。
This paper presents the Rossi-α method for the micro-noise analysis in the reactor physics ex-periments,which is applied in the study of measurement of the kinetic parameter,α eigen value,of Tsinghua University's Sub-Critical Facility.The measurement is performed under extremely low flux condition,and αc,the critical α eigenvalue,is obtained by the way of extrapolation.Meanwhile,the theoretical calculation has been carried out based on MCNP and TMCC codes.Results from measurement and calculation agree well with each other.