在1/10的比例模型上完成了反应堆压力容器下降环腔在有安全注入流动时的瞬态温度变化,实验考察了有一回路流动和无一回路流动对瞬态温度变化的影响。实验证明:无一回路流动时,下降环腔内瞬态温度的变化速度和幅值随安全注入流速的增加而增加;有一回路流动时,下降环腔内瞬态温度的变化幅值比同安全注入流速时无一回路流动的变化幅值要小。 The transient temperature change of the reactor pressure vessel descending ring chamber during the safe injection flow was completed on the 1/10 scale model. The effects of one-stage flow and no-one-stage flow on the transient temperature changes were investigated experimentally. The experimental results show that the transient temperature and the amplitude of the descending ring cavity increase with the increase of the safety injection flow rate when there is no flow in the loop. The amplitude of the transient temperature drop in the descending ring cavity increases with the flow of the first loop, No change in the flow of injection when the flow rate of change to be small.