铍反射层光激缓发中子对物理启动特性的影响

Research on Nuclear Properties of Beryllium Reflector In Physical Startup of Reactor

给出铍的光激缓发中子组常数、停堆倒换料期间和向临界过渡前堆内中子源强值。全部采用解析函数模型,给出不同反应性引入速率下物理启动到临界状态时的中子源强值及到达周期保护的时间;给出阶跃引入反应性下堆芯发生超临界缓发瞬变、瞬发瞬变时堆功率的变化结果和释放的总能量等。

This paper presents photoneutron group constants of beryllium and the neutron source strength value in the core on refueling period and before the critical transition. The paper set up the analytic function model, given neutron source strength value and the time of which the core achieve the periodic protection when the core inserted the different reactivity rate between physical startup to the critical, and given reactor power changes with the time and the total released energy and other physical parameters when the core happened supercritical delayed transient and prompt transient at introducing step reactivity.