Experimental device and method for rupture mechanical impact and vapor bubble migration of lead-based stack evaporator heat transfer tube

Abstract

A lead-based stack evaporator heat transfer tube rupture mechanical impact and vapor bubble migration experiment device and method, the device includes two reaction containers, high-pressure water container, lead storage tank, argon buffer tank, lead discharge container, gas coagulation evaporator, cold trap, vacuum system and other auxiliary systems, specifically simulating the secondary circuit high-pressure water jet flowing into the primary circuit evaporator and lead pool environment under the rupture accident of the lead-based stack evaporator heat transfer tube, causing mechanical impact on the evaporator heat transfer tube The accident phenomenon, and the accident phenomenon that the generated vapor bubbles are entrained into the core by the lead-based alloy; the whole experimental circuit is designed to simulate the heat transfer tube bundle and the strain measurement device, and at the same time realize the The flow of the lead-based alloy and the entrainment and observation of water vapor bubbles by the flowing lead-based alloy are realized, which makes the experimental circuit rich in research phenomena and perfect in function, and the experiment can be repeated many times, which increases the practicability of the experimental circuit.

Description

technical field [0001] The invention relates to the field of interaction between water vapor and liquid metal two-phase flow and the field of mechanical mechanics of pressure wave transmission and mechanical impact, in particular to an experimental device for studying the rupture mechanical impact and vapor bubble migration of lead-based stack evaporator heat transfer tubes and method. Background technique [0002] Lead-based reactors have good inherent safety, thermal-hydraulic characteristics, and neutron physical properties. At the same time, they have outstanding advantages in miniaturization, sustainability, and economy. They have become one of the main candidate types of fourth-generation advanced nuclear reactors. . [0003] The steam generator is used as the pressure boundary and heat transfer hub of the primary and secondary circuits of the lead-based reactor. The pressurized water of the secondary circuit is introduced into the main container through the tube side...

AI Technical Summary

Problems solved by technology

[0005] In view of the above research ideas, the existing domestic and foreign research schemes have the following deficiencies: 1) The simulated lead pool environment is not a flow environment, that is, it is impossible to realize the entrainment of steam bubbles by the lead-based alloy; 2) There is no design of the reaction vessel and There is no visible window, so it is impossible to observe whether there is an accumulation effect after the steam bubbles flow through the core; 3) There is no design of simulated heat transfer tube bundles and design of strain measurement, so it is impossible to realize the research on the impact strain of high-pressure jet water on heat transfer tubes

These design flaws limit the integrity of research on various phenomena of heat transfer tube rupture accidents in lead-based reactor evaporators

Images