核电厂主控制室热扰强度限值研究

Thermal disturbance intensity limitation in main control rooms of nuclear power plants

主控制室非能动热阱在非能动压水堆核电厂发生事故时用于主控制室的室内温度控制。建立了模型分析系统,对不同热扰强度对室内温升的影响进行了研究。对热扰强度为模型热扰强度的1倍、1.25倍、1.5倍、1.75倍和2倍5种工况进行了模拟分析,发现在事故发生后72 h内,5种工况的室内温升分别为4.16、5.05、6.02、6.96、7.85℃。拟合了最大温升随室内热扰强度和热阱体量同时变化的二元函数,可以得出对应温升安全限值8.3℃,热扰强度不应超过模型热扰强度的2.10倍。

The indoor air temperature of main control rooms is controlled by the passive heat sink when there is an accident in passive nuclear power plant.Establishes a model analysis system,and studies the impact of different thermal disturbance intensities on indoor air temperature rise.Simulates and analyses five operation conditions that the thermal disturbance intensity is 1 time,1.25 times,1.5 times,1.75 times and 2 times of the model thermal disturbance intensity.The results show that the temperature rises of the five conditions are 4.16,5.05,6.02,6.96,7.85℃,respectively,during 72 hours in accident.Obtains a binary function of the maximum temperature rise varying with the indoor thermal disturbance intensity and the heat sink capability by fitting,and concludes that corresponding to the temperature rise safety limit of 8.3℃,the thermal disturbance intensity should not exceed 2.10 times of the model thermal disturbance intensity.