A combustible tritium, carbon-14 sample preparation system

Abstract

The invention discloses a preparation system for a combustible tritium and carbon-14 sample. The system comprises a reaction work tube, an oxidative combustion furnace and an adsorption device, wherein the reaction work tube comprises a tube body, a first air inlet hole, a second air inlet hole and a vent hole; the oxidative combustion furnace comprises a first temperature controller, a second temperature controller, a third temperature controller, an electric heating wire, a heat preservation material panel and a warming area; the warming area is divided into a catalytic reaction area, a sample stacking area and a sample recovering area; the temperature controllers can be used for regulating the interval temperatures of the catalytic reaction area, the sample stacking area and the sample recovering area; the vent hole is connected with the adsorption device, oxygen and nitrogen are respectively guided into the tube body from the first air inlet hole and the second air inlet hole, and the first air inlet hole and the second air inlet hole are formed in two sides of the tube body. The system disclosed by the invention is simple in structure and easy to manufacture, and a combustible sample is fully oxidized during catalytic reaction, so that the sample absorption rate of the tritium and carbon-14 sample is increased to a great extent, and the sample measurement demand of the modern industry is satisfied.

Description

technical field [0001] The invention belongs to the field of radioactivity detection, and in particular relates to a combustible tritium and carbon-14 sample preparation system. Background technique [0002] During the reprocessing of nuclear fuel, carbon-14 and tritium are released during the shearing and disintegration stages of the fuel. These nuclides are readily taken up by crops and require monitoring for these nuclides in environmental materials and in decommissioned materials or low-level waste that are shipped to storage. The prior art adopts oxidation combustion reaction to extract carbon-14 and tritium from some tritium-containing concrete, steel or graphite for analysis. This prior art combustible tritium and carbon-14 sample preparation device adopts a two-temperature zone design structure of a catalytic zone and a sample stacking zone. In actual use, insufficient sample oxidation often leads to adsorption and residue at both ends of the working tube, resultin...

AI Technical Summary

Problems solved by technology

In actual use, insufficient sample oxidation often leads to adsorption and residue at both ends of the working tube, resulting in low sample recovery efficiency

In addition, there are still a series of technical problems such as long reaction time, unstable low-temperature environment outside the collection bottle, which leads to a decrease in absorption rate; small diameter of the working tube, small amount of single-time sample loading, and difficulty in meeting the actual measurement requirements for a single-time prepared sample.

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