When the metal rods of cadmium were pushed all the way in,and stray neutrons that entered the pile were absorbed,and could not enter uranium-235 nuclei,and so there was no reaction at all.

• 当镉金属棒全部推入，进入反应堆的流动中子就被吸收，不能进入铀235原子核，因而完全没有反应。