In the&nbsp;hypothetical&nbsp;liquid metal reactor SGTR (Steam Generator Tube Rupture) accident, the high-pressure water in steam generator tube&nbsp;will be&nbsp;injected into the high-temperature liquid metal.&nbsp;During the water- liquid metal interaction, water vaporized and vapor bubbles migrated into&nbsp;liquid metal to form a water/steam-liquid metal system, which could be resulting a sharp pressure raise and threatening the safety of the reactor. This multi-phase system can be abstracted as a system in which a high-pressure subcooled fluid (overheating state at atmospheric pressure) is injected into another higher temperature normal pressure fluid to form a two-component (water and liquid metal) system in which multiphase (fluid and vapor) were existed. An experimental bench was established to observe the spatial distribution of each phase and the size distribution of the bubble in this system, in order to achieve&nbsp;visual observation, glycerin was used to simulate liquid metal and a sliced glass tank was set to hold high temperature glycerin at atmospheric pressure. High pressure Argon gas source was&nbsp;adopted&nbsp;to driven&nbsp;the&nbsp;water injection, camera was used to record water level changing in a glass tube to measure water injection rate. When the high pressure subcooled water (overheating at atmospheric pressure) was injecting into the glycerin, a high-speed camera was used to observe the water-glycerin interaction process, quick&nbsp;thermal&nbsp;response thermocouples&nbsp;were&nbsp;used to monitor the temperature of&nbsp;the fluid domain. As a result, the multiphase flow pattern evolution and distribution of vapor bubbles in this multiphase system at different time was obtained through imagine processing, what’s more, the diameter distribution of bubbles&nbsp;was&nbsp;also obtained, and based on this, the heat transfer interface between glycerin and water vapor was&nbsp;evaluated

Study on Interaction of Pressurized Subcooled Wwater Injected With Thermal Glycerin

Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE28/volume/85246

2021 28th International Conference on Nuclear Engineering (ICONE28)

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