Experimental device and method for studying thermal-hydraulic characteristics of lead-based reactor evaporator heat transfer tube rupture accident

Abstract

An experimental device and method for studying the thermal hydraulic characteristics of a lead-based reactor evaporator heat transfer tube rupture accident, the device includes a reaction vessel, an injection section, a high-temperature and high-pressure water container, a lead storage tank, an argon buffer tank, a vacuum system and others The auxiliary system specifically simulates and studies the high-pressure subcooled water of the secondary loop of the lead-based reactor evaporator sprayed into the primary loop lead alloy and rapidly vaporized, causing the thermal hydraulic phenomenon of a sudden increase in the pressure of the primary loop; the entire experimental device is flexibly arranged in the reaction vessel The temperature measuring point and the pressure measuring point can be flexibly injected into the high-temperature and high-pressure water container with argon gas of different pressures and water of different volumes, and the structure of the injection sleeve of the injection section and the scratch depth of the brass cap can be flexibly changed to carry out various water Measurement of lateral pressure, different injection heights and directions of the experimental working conditions increases the flexibility and reliability of the entire experimental device.

Description

technical field [0001] The invention relates to the field of two-phase flow interaction between water and liquid metal, in particular to an experimental device and method for studying the thermal-hydraulic characteristics of a lead-based stack evaporator heat transfer tube rupture accident. Background technique [0002] A lead-based reactor refers to a type of reactor that uses liquid metal lead or lead-secret alloy (collectively referred to as lead-based materials) as a coolant. The rupture accident of the steam generator heat transfer tube of the lead-based reactor is an accident process in which the high-pressure water in the secondary circuit is vaporized and enters the core along with the flow of the coolant in the primary circuit under the rupture condition of the steam generator heat transfer tube. [0003] During the accident process of the heat transfer tube rupture accident of the lead-based reactor evaporator, an accident phenomenon that needs to be paid attention...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned research ideas, the main disadvantages of the existing research schemes at home and abroad are: 1) The position of high-pressure water injection is mostly adopted from the fixed position of the upper end or the lower end of the pressure vessel, and the high-pressure water is carried out vertically downward or upward. Injection, it is impossible to flexibly change the injection position, injection direction, and injection angle of high-pressure water; 2) It is impossible to conveniently replace the injection section, that is, it is impossible to flexibly set a wider and more in line with engineering reality for the diameter of the injection port of the injection section The research conditions of lead alloy temperature and high pressure water pressure cannot solve the problem of abrasion of lead alloy on the injection section caused by continuous experiments

These design drawbacks have seriously affected the flexibility of experimental research, the richness of experimental conditions, and the prevention of lead alloy erosion, etc.

Images