Experimental device and experimental method for researching behavior of boiling bubbles in pit under severe accidents

Abstract

The invention aims to provide an experimental device and an experimental method for researching the behavior of boiling bubbles in a pit under severe accidents. The device comprises a glass container,a condensed water tank and a preparation water tank. A top cover is mounted at the upper end of the glass container. A base is mounted at the lower end of the glass container. The top cover is connected with the top of the condensate tank through a first pipeline. The lower portion of the glass container is connected with the bottom of the condensation water tank through a second pipeline, the upper portion of the condensation water tank is connected with the lower portion of the preparation water tank through a third pipeline, spiral coils of the electromagnetic inductor are wound outside the glass container, gaps for shooting are reserved between the spiral coils, and a heater and a stirrer are arranged in the preparation water tank. The decay heat of aerosol in the pit can be visuallysimulated, and the behavior of boiling bubbles in the pit can be deeply studied. The heating boiling behavior of aerosol in the pit can be independently researched, and the boiling behavior of the aerosol in the pit with melt can also be researched at the same time.

Description

technical field [0001] The invention relates to a simulation experiment device and an experiment method, in particular to a simulation experiment device and an experiment method for boiling bubbles in a pit after a nuclear accident. Background technique [0002] After a serious reactor accident, the fuel element cladding of the core will fail in a large area, and radionuclides will be released from the primary circuit to the containment. Aerosols are one of the main states of radionuclides that migrate and settle within the containment. At the same time, since the special safety facilities are put into use (such as: the spray system sprays cooling water into the containment), most of the aerosols will settle down and flow into the pit of the containment. These aerosol particles suspended in the crater release heat of decay. Under the action of decay heat, the water in the pit is continuously heated to boiling and generates boiling bubbles, which rise to the surface of the ...

AI Technical Summary

Problems solved by technology

This type of heating method is that the solid itself generates heat and radiates outward, which can be used to simulate the heating of the pebble bed. However, these experimental devices for studying flow heat transfer have certain requirements for the volume of the metal ball. Bubbles, so this type of experimental setup cannot be used for the decay heat simulation of aerosols

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