Experimental Study on Wind Load Performance of ACP100 Passive Containment Air Cooling System

Environmental wind field has important influences on the operation of passive containment air cooling system (PAS) of ACP100, a modular pressurized water reactor nuclear power plant. A small-scale model of ACP100 is built in the wind tunnel platform to explore the influence of different environmental wind direction angles and wind speed conditions on the operation of PAS. At the same time, the ACP100 test model (mainly composed of wind tunnel platform model and ACP100 small-scale model) and the original model are numerically simulated by Ansys Fluent. The results show that all environmental wind direction angles and wind speed conditions are conducive to PAS heat transfer; with the increase of the environmental wind speed, the PAS inlet and outlet pressures have a quadratic decreasing relationship with the environmental wind speed. When the environmental wind speed reaches 12.5 m/s, the pressure difference between the inlet and outlet of PAS is positively proportional to the square of the environmental wind speed; The numerical simulation results of ACP100 original model show that the greater the ACP100 wind speed, the better the PAS heat exchange effect. When the ACP100 wind speed reaches 20 m/s, the increase of PAS heat exchange power corresponding to each environmental wind direction angle is 23.0% ~56.5% compared with that under windless conditions, with an average increase of 35.6%. The research results provide a powerful reference for the design and optimization of ACP100.