Pressurized water reactor containment vessel two-side condensation and evaporation coupling calculation method

Abstract

The invention discloses a pressurized water reactor containment vessel two-side condensation and evaporation coupling calculation method. The method comprises the following steps: establishing a pressurized water reactor containment vessel computational domain simplified geometric model; performing grid generation on each part in the pressurized water reactor containment vessel computational domain model to obtain a grid model of each part; setting an interface of each part in a calculation domain of the pressurized water reactor containment as a grid interface to realize splicing of grids ofeach part; performing steam condensation calculation in the range of the fluid domain grid model in the containment vessel; calculating the temperature distribution in the solid domain of the containment body structure through the heat conduction relational expression; and calculating a flow field and a temperature field of a liquid film in an external fluid domain of the containment vessel by adopting a liquid film model.

Description

technical field [0001] The invention belongs to the technical field of thermal hydraulic calculation of nuclear reactors, and particularly relates to a method for coupling condensation and evaporation on both sides of a pressurized water reactor containment vessel. Background technique [0002] The containment is the last barrier to prevent the release of radioactive substances in the pressurized water reactor nuclear power plant, so ensuring the integrity of the containment is crucial to ensure the safety of the nuclear power plant. Under this premise, at present, PWR nuclear power plants, such as AP1000, are equipped with a containment cooling system for containment cooling under accident conditions. In the event of a rupture in the primary circuit of the reactor, a large amount of coolant flashes into superheated steam, but with the discharge of the coolant steam, the pressure and temperature in the containment rise sharply, which affects the integrity of the containment....

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.

Images