Multifunctional sodium-cooled fast reactor debris bed simulation device and light refraction compensation measurement method

Abstract

The invention discloses a multifunctional sodium-cooled fast reactor debris bed simulation device and a light refraction compensation measurement method. Comprising an experimental device supporting platform, and a telescopic supporting platform, a data acquisition system, a fragment bed particle release system, a dry particle collection system, a visual fragment bed particle container, a light refraction compensation container and a fragment bed heating and gas injection mixing system which are arranged on the experimental device supporting platform, wherein the light refraction compensation container is located outside the visual fragment bed particle container and integrally arranged in the telescopic supporting platform, and the fragment bed particle release system is located above the telescopic supporting platform and right faces the visual fragment bed particle container. The fragment bed heating system and the dry particle collecting system are sequentially arranged below the experimental device supporting platform, the fragment bed heating system is connected with the visual fragment bed particle container, and the dry particle collecting system is connected with the gas injection system. Model support is provided for development and verification of large-scale safety analysis programs, angle data of the simulation device are accurately extracted through light refraction compensation measurement, and a correction scheme can be provided for observation and detection of industrial actual cylindrical containers.

Description

technical field [0001] The invention relates to a technology in the field of nuclear reactor control, in particular to a sodium-cooled fast reactor debris bed simulation device and a photorefraction compensation measurement method for simulating the continuous process of formation, leveling, and drying of the entire debris bed. Background technique [0002] The fourth-generation nuclear reactor has the advantages of consuming depleted uranium to realize fuel multiplication and transmutation of long-lived radioactive waste, making the sodium-cooled fast reactor a promising fourth-generation reactor type. When a core disintegration accident occurs in a sodium-cooled fast reactor, the core fuel is broken and melted, interacts with the coolant, solidifies and disperses into granular debris, and the debris deposits on the surface of the lower chamber structure and forms a debris bed. The coolant in the bed is Boiling occurs under the action of the decay heat of the fragment bed p...

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Problems solved by technology

[0003] The present invention aims at the inability to track the follow-up formation and leveling process after the melt is broken into fragments in the prior art, and the inability to simulate the formation and leveling of the debris bed, the study of overall characteristics, the generation of decay heat, the measurement angle deviation of the light refraction band of the simulation device, and the discharge. The particles in the debris bed are wet particles, which will interfere with the experimental results later. A multifunctional sodium-cooled fast reactor debris bed simulation device and a light refraction compensation measurement method are proposed, which can not only analyze the debris bed of the sodium-cooled fast reactor under accident conditions The continuous simulation of formation and leveling behavior can also be used to measure the dry heat flux density of the debris bed. By controlling the heating power and gas injection rate to simulate the boiling situation, the continuous experiment of the formation and leveling of the debris bed can effectively realize the sodium-cooled fast reactor debris The formation and leveling behavior of the bed can also be measured by controlling the power to measure the dry heat flux of the debris bed, providing a method for studying the formation and leveling mechanism of the debris bed, providing data support for the drying up of the debris bed, and providing model support for the development and verification of large-scale safety analysis programs , and accurately extract the angle data of the simulation device through optical refraction compensation measurement, and can provide a correction plan for the observation and detection of industrial actual cylindrical containers

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