Experimental research on the pressure response of gravity boron injection system

The pressure response of gravity boron injection system for 200 MW low temperature heating reactor under different initial conditions is described. According to the thermal hydraulic performance of the boron injection system, simulation similarity criterion is brought forward to guarantee that the simulated experimental system has the same or similar thermal process as the actual reactor system. The main object of the experiment is to research the effect of the system initial pressure, the resistance character of the vapor and liquid tubes, the vapor and liquid communicating modes, the ratio of the volumes of the upper space of reactor and boron injection tank on the time of pressure balance and response time of boron injection under cold and heat statement. The experiment result shows that the time of pressure balance under heat statement is a little longer than that under cold statement to be about 3 seconds, and the time of boron injection is about 6 seconds. The effect of the parameters listed above on the response character is not so large. So, it is can be approved that the system can stop the reactor safety. The effect of the parameters on the pressure balance time is different than that after the upper space volume of boron injection tank increased. This difference will bell researched in the Successive experiments