A Coupled Calculation Method of Condensation and Evaporation on Two Sides of Containment of Pressurized Water Reactor

Abstract

The invention discloses a calculation method for coupling condensation and evaporation on both sides of the containment of a pressurized water reactor, which comprises the following steps: establishing a simplified geometric model of the calculation domain of the containment of the pressurized water reactor; Grid division to obtain the grid model of each part; by setting the interface of each part in the containment calculation domain of the pressurized water reactor as the grid interface to realize the splicing of the grids of each part; within the range of the fluid domain grid model in the containment The steam condensation calculation is carried out inside; the temperature distribution in the solid domain of the containment body structure is calculated by the heat conduction relation; the flow field and temperature field of the liquid film in the fluid domain outside the containment are calculated by using the liquid film model.

Description

technical field [0001] The invention belongs to the technical field of thermal-hydraulic calculation of nuclear reactors, and in particular relates to a coupling calculation method for condensation and evaporation on both sides of a containment shell of a pressurized water reactor. Background technique [0002] The containment vessel is the last barrier to prevent the release of radioactive substances in the PWR nuclear power plant, so ensuring the integrity of the containment vessel is crucial to ensure the safety of the nuclear power plant. Under such a premise, the current pressurized water reactor nuclear power plant, such as AP1000, has set up a containment cooling system for containment cooling under accident conditions. In the event of a break in the primary circuit of a reactor, a large amount of coolant flashes into superheated steam, but with the spraying of coolant steam, the pressure and temperature in the containment rise sharply, this phenomenon has caused seri...

AI Technical Summary

Problems solved by technology

However, calculations focus more on the calculation of a single phenomenon on one side. Although it can provide some guidance for the design of the containment and capacity assessment, this single-phenomenon calculation lacks global key phenomena, such as the gap between the condensed liquid film and the evaporated liquid film. Capture of heat conduction, natural convection between the evaporated liquid film outside the containment and the air, etc.

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