摇摆条件下非能动余热排出系统运行特性的试验研究

Experimental Research on Operational Characteristics of Passive Residual Heat Removal System Under Rolling Motion

在摇摆台架上对摇摆条件下的非能动余热排出系统运行特性进行了试验研究。分析了摇摆运动对非能动余热排出系统各主要参数的影响,并对摇摆条件下的重位压降和附加压降对流速的影响进行了理论分析。在摇摆过程中,各参数的波动周期与摇摆周期一致,摇摆幅度越大,各主要参数波动越剧烈;凝水流量平均值与凝水温度变化趋势相同,冷却水进出口温差平均值有所差异,但其波动幅度却相差不大。蒸汽压力和凝水温度在摇摆过程中无波动。附加压降会使流速不断变化,但不会对平均流速产生影响,平均重位压降降低是造成平均流速减小的1个原因。

The operational characteristics of passive residual heat removal system on the rolling apparatus were investigated experimentally. The effects of rolling motion upon main parameters of passive residual heat removal system were analyzed. The effects of gravity and additional pressure drop in rolling motion upon flow velocity were also investigated theoretically. In rolling motion, the fluctuating period of the main parameters is the same with that of rolling motion. The parameters’ fluctuations become more significant as the rolling motion becoming more acute. The variation trends of average condensate flow and temperate are the same. The average I/O coolant temperature is different, but their fluctuating amplitudes are nearly the same. Steam pressure and condensate temperature do not oscillate in rolling motion. Additional pressure drop can cause the response of the flow velocity, but it does not effect upon the average flow velocity. The decreasing of average flow velocity is partly caused by the reduced average gravity pressure drop.