Experiment device for study characteristic of breakage behavior of aerosol-containing liquid bath surface bubble and experiment method of experiment device

Abstract

The invention aims to provide an experiment device for study characteristics of breakage behaviors of aerosol-containing liquid bath surface bubbles and an experiment method of the experiment device.The experiment device comprises a preheating water tank, a heating water tank, an air cavity, a flash rising section, an overflowing water tank, a backflow water tank and an ultrasonic generator, wherein the lower part of the ultrasonic generator is connected with a descending tube; the descending tube extends into the preheating water tank; the bottom of the preheating water tank is communicatedwith a peristaltic pump; the peristaltic pump is communicated with a coiled tube through a hose; the coiled tube is arranged inside the heating water tank; the heating water tank is communicated witha water storage container through a water injection pipeline and a valve; the outlet of the coiled tube is communicated with the inlet of a flash section; the overflowing water tank, the flash risingsection and the air cavity are sequentially connected from top to bottom; the overflowing water tank is fixed inside the backflow water tank; the flash rising section is fixed below the backflow watertank. By adopting the experiment device, behaviors that bubbles are broken to generate liquid droplets in different liquid-phase environments at different temperatures can be measured, and entrainment behaviors of aerosol under accident working conditions of nuclear power plants can be well reappeared.

Description

technical field [0001] The present invention relates to an experimental device and method for simulating a nuclear accident, in particular to an experimental device and an experimental method for researching source term release behavior. Background technique [0002] After a serious accident in a nuclear reactor, such as a breach in the primary circuit steam pipe or even a meltdown of the core, the primary circuit system of the reactor may be polluted by suspended or dissolved radionuclides, under the action of natural settlement or engineering safety facilities , radioactive aerosols will stay in the liquid pool. Due to the effect of decay heat or pressure drop, the liquid pool will boil and generate bubbles; in the filtration and discharge system of the containment, when gas is injected into the liquid pool, bubbles will also be generated in the liquid pool, and when the bubbles rise to the surface of the liquid pool , the droplets produced by its rupture will entrain rad...

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Problems solved by technology

However, in certain cases, it also has certain limitations—the optical measurement method causes bubbles to have boundary shadows, which makes it difficult to segment the edges of the bubbles, and, in high-temperature experiments, due to the evaporation of the main liquid phase. The problem of fogging of droplets on the wall also hinders the visualization of this phenomenon

[0007] To sum up, most of the experimental devices used in the current research on bubble bursting to produce liquid droplets are designed for pure liquid pools, which are inconsistent with the properties of the liquid phase under actual reactor accident conditions. The pool contains aerosols and is not at normal temperature; and the existing devices generate bubbles in a single way; most of the high-speed photography methods used in the study of bubble generation, bursting and droplet entrainment are based on normal temperature, steady-state experiments, but it is not applicable to conduct experiments in the high temperature environment of the actual operating conditions

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