Experimental and numerical simulation of passive heat sink in main control room of nuclear power plants

Designs and builds an experimental chamber of passive heat sink model for the main control room. Under different internal heat disturbance intensity and duration, measures the changes of indoor air temperature and the heat storage of the roof and wall heat traps, and analyses the effects of various factors on indoor temperature and heat storage in heat traps. The results show that the outdoor temperature has little effect on the maximum temperature in the main control room within 72 hours after the accident. The different initial indoor temperature will lead to different indoor maximum temperature within 72 hours after the accident, but it has little effect on the growth rate of temperature. Increasing fin height and reducing fin spacing can reduce the maximum indoor temperature.