A concentration monitoring device for different forms of tritium in complex ambient gases

Abstract

The invention provides a system for monitoring concentration of tritium with different forms in complex environment gas. The system comprises a sampling device for sampling of environment gas, and further comprises a tritiated water concentration monitoring module connected to the sampling device and used for separating tritiated water from other gases in the environment gas and measuring the concentration of the tritiated water, and a reduced tritium concentration monitoring module connected to the tritiated water concentration monitoring module and used for performing catalytic oxidation on reduced tritium in the other gases to generate tritiated water, separating the oxidized tritiated water from the other gases, measuring the concentration of the oxidized tritiated water, and acquiring the concentration of reduced tritium according to the concentration of the oxidized tritiated water. Through the adoption of the system, the concentrations of both tritiated water and reduced tritium in the complex environment gas containing tritium with different forms and various radionuclides can be measured.

Description

technical field [0001] The invention belongs to the technical field of radiation protection and environmental protection, and in particular relates to a device for monitoring the concentration of tritium in different forms in complex ambient gases. Background technique [0002] Tritium (T) is a radioactive isotope of hydrogen and a low-energy β-radiator. The maximum energy of β-rays is 18.6KeV, the average value is 5.6KeV, and the half-life is 12.26 years. It is well known that nuclear facilities generate large amounts of tritium, mainly in the chemical forms of tritiated water (HTO) and reduced tritium (including HT, CH3T), which are released to the environment in the form of gaseous or liquid effluents. The different chemical forms of tritium will cause great differences in the harm to human body, specifically, HT or CH 3 Even if T enters the human body, its residence time in the human body is relatively short, and it is less harmful to the human body; while tritiated wat...

AI Technical Summary

Problems solved by technology

At present, the monitoring of tritium concentration in China is mainly realized by measuring its beta radioactivity in ionization chambers, proportional counters or liquid scintillation counters. However, this solution can only measure the total concentration of tritium, but cannot identify its various chemical forms.

At the same time, there are also gamma radiation and other gaseous radionuclides in nuclear facilities. In this ambient gas with multiple rays coexisting, the beta rays of tritium cannot be distinguished, so the measuring device cannot perform differential measurement

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