一、引言 对于一个新型堆,在其正式投入运行之前,反应性的测量十分重要。本工作的主要任务是在脉冲堆首次零功率物理实验中测量其反应性,以验证堆芯设计参数。校核理论计算,探讨运行和实验技术,指导脉冲堆首次物理启动实验的安全运行,为脉冲堆正式投入运行提供实验参数。全部工作于1989年10月结束。 I. Introduction For a new type of reactor, the measurement of reactivity is important until it is formally put into operation. The main task of this work is to measure its reactivity in the first zero-power physics experiment of pulsed reactor to verify the core design parameters. The theoretical calculation and discussion of operation and experimental techniques are conducted to guide the safe operation of the first physical start-up experiment of the pulse stack and provide experimental parameters for the formal operation of the pulse stack. All work ended in October 1989.