Research on ventilation of nuclear facilities based on Modelica

Taking the ventilation system of a comprehensive experimental platform in the experimental base as the research, a multi-zone ventilation model was established based on Modelica, and ventilation simulation and experimental research were conducted under multiple working conditions. The results indicate that the multi-zone model established using Modelica can provide reliable tools and methods for the design and research of ventilation containment in nuclear facility buildings. Under the maintenance conditions of nuclear facilities, there may be a sudden jump in pressure differential, which poses a potential risk of pollutant diffusion, and the pressure differential in other equipment rooms under the same exhaust system will decrease accordingly; Under heating conditions, the pressure differential in the heated room gradually increases, while the pressure differential in other equipment rooms is not significantly affected.