An automatic sampling device for tritium in water

Abstract

The invention belongs to the technical field of sample sampling, and discloses an automatic sampling device of tritium in water. The automatic sampling device comprises a mechanical part and a control part; the mechanical part comprise an evaporation unit, a condensing unit, and a collecting unit; the control part comprises a control cabinet, a control panel, a control software, a magnetic valve, a flowmeter, and a thermometer; and the automatic sampling device is used for realizing automatic operation of sample injection, distillation, condensation, and collection of samplings. The automatic sampling device is high in sampling speed and collecting speed of tritium in water, and is capable of avoiding entrainment effectively, and realizing automatic sampling.

Description

technical field [0001] The invention belongs to the technical field of sample sampling, in particular to an automatic sampling device for tritium in water. Background technique [0002] During the discharge of wastewater from nuclear facilities, it is necessary to control the content of tritium in real time, so a large number of sampling and analysis tasks need to be completed quickly. The traditional tritium analysis sample preparation generally adopts the distillation method. During the distillation process, the solution will boil, so that some very small droplets and mist will be entrained with the steam into the collection solution. For ordinary environmental samples, although the content of radioactive substances is relatively small, the impurities introduced by mist entrainment will cause great interference to the liquid scintillation measurement of tritium, resulting in inaccurate measurement results. In addition, the distillation method generally has a long return l...

AI Technical Summary

Problems solved by technology

For ordinary environmental samples, although the content of radioactive substances is relatively small, the impurities introduced by mist entrainment will cause great interference to the liquid scintillation measurement of tritium, resulting in inaccurate measurement results

In addition, the distillation method generally has a long return line, the distillation efficiency is low, and multiple distillations are required due to too many interfering substances, resulting in a long time-consuming. Most of the distillation devices are made of quartz glass materials. During sampling, cleaning, During the distillation process, the operation is cumbersome and the human influence factors are relatively large

In the annual report of China Institute of Atomic Energy "Rapid Separation Method of Tritium in Low-level Wastewater" published by Liang Xiaohu and others in June 2013, the method of sampling tritium using rapid sub-boiling distillation and low-temperature cooling was disclosed, but only the principle was disclosed. The device structure and parameter requirements for tritium sampling are not disclosed

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