Tritium activity online detection system

Abstract

The invention provides a tritium activity online detection system which comprises a sample inlet and a sample outlet, and a sampling unit and a measuring unit are sequentially connected between the sample inlet and the sample outlet along a pipeline; wherein the measuring unit comprises a black box, and a measurement assembly located in the box and a signal transmission assembly located outside the box and connected with the measurement assembly. The measurement assembly comprises plastic scintillation fibers, and the plastic scintillation fibers comprise first plastic scintillation fibers coated with a reflective material, and exposed second plastic scintillation fibers. According to the tritium activity on-line detection system, plastic scintillation fibers are adopted to measure the radioactivity, the response speed is high when a tritium sample is measured, measurement is simple, the measurement time is short, the two kinds of plastic scintillation fibers are adopted, other radioactivity interference can be eliminated, and real-time measurement of the tritium activity of the tritium sample in a complex environment is achieved.

Description

technical field [0001] The detection system designed in the present invention is specifically an online detection system for tritium activity. Background technique [0002] Tritium is a radionuclide that emits beta rays, which have low energy, short range, and are easy to shield. If other radionuclides are mixed in the tritium sample, the measurement results of the tritium activity are easily affected by them. [0003] During the operation of nuclear power plants, a large amount of tritium-containing wastewater and waste gas containing tritium will be produced. It is very difficult to measure the tritium concentration in these waste water and waste gas. Because these samples usually contain other radionuclides, which emit gamma and beta rays of various energies, which will interfere with the measurement of tritium and affect the accuracy of tritium activity measurement. [0004] At present, the liquid scintillation measurement method after sampling is mostly used for liqui...

AI Technical Summary

Problems solved by technology

This method cannot be measured in real time, and requires purification of complex component samples, which takes a long time to measure and produces a large amount of radioactive waste

However, the gaseous tritium sample uses the ionization chamber measurement method, and the ionization chamber cannot distinguish the source of various rays

Therefore, the measurement results will be inaccurate

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