Alkali metal sampling device

Abstract

The invention provides an alkali metal sampling device. The device comprises an alkali metal sampling assembly, an operation box and an atmosphere adjusting assembly; the alkali metal sampling assembly is in fluid communication with an alkali metal loop, and is used for extracting alkali metal from the alkali metal loop; the operation box matches the alkali metal sampling assembly in a sealed modeand used for operating the alkali metal sampling assembly; and the atmosphere adjusting assembly is in fluid communication with an inner cavity of the alkali metal sampling assembly and used for providing a needed internal atmosphere environment for the alkali metal sampling assembly. The alkali metal sampling assembly is directly connected with the alkali metal loop, therefore, on-line samplingof the alkali metal loop is realized; the contact with air in the sampling process is avoided; an appropriate environment is provided for alkali metal sampling through the operation box matching the alkali metal sampling assembly in a sealed mode and the atmosphere adjusting assembly, so that contact between an alkali metal sample and air is avoided in the whole process; the original property of alkali metal is guaranteed as much as possible; and guarantee is provided for accuracy of follow-up tests.

Description

technical field [0001] The present invention relates to a sampling device, more particularly, to a device for sampling alkali metals in a heat exchange circuit or an experimental circuit of a fast reactor. Background technique [0002] At present, materials such as alkali metal sodium, potassium, lithium, and sodium-potassium alloys are widely used as heat transfer media in the fields of chemical industry, fuel, metallurgy, pharmaceuticals, and nuclear energy. The presence of impurities in the above-mentioned alkali metals and alloys will affect its performance, especially the presence of impurities such as oxygen, carbon, and calcium in the alkali metals or alloys will affect the heat transfer performance of the material, and will also affect the use of the above materials. Adverse effects on the mechanical performance, service life and reliability of the equipment. [0003] In practical applications, in order to study the properties of alkali metals and analyze the impuri...

AI Technical Summary

Problems solved by technology

[0004] At present, the sampling conditions of the fast reactor such as the sodium-cooled fast reactor such as the heat exchange circuit of the primary circuit are more complicated. The sampling pipe of the existing mobile sampling container is blocked with waste sodium and exposed to the air. Sodium readily enters the sampling vessel and contaminates the sample as it is taken due to the inability to flush the sampling leg and sampling vessel thoroughly with the alkali metal

In addition, the sampling equipment for the primary circuit of the sodium-cooled fast reactor is used for sampling radioactive sodium in the primary circuit of the sodium-cooled fast reactor, but its structure is complex and the equipment is huge, so it is not suitable for conventional alkali metal sampling

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