Abstract
The large fire door is the key component to ensure the effectiveness of fire zone in AP1000 nuclear reactor. According to the fire design requirements and design criteria, the global structure of the large fire door is designed. Based on the designed structure, the thermal mathematical model of the large fire door is established. Based on the solid heat transfer theory, the multi-layer heat transfer theory and integrated heat transfer theory, the differential equations of heat conduction, initial conditions, and boundary conditions are determined. Thermal analysis for the fire door leaf and the closure is carried out by using the method of numerical simulation. Results show that: considering the thermal load, the whole structure of the large fire door can meet the fire resistance limit of 3 hours and the design is reasonable and feasible. This study provides theory basis for the design of the large fire door.
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