Sensor for on-line detection of tritium content in liquid lead-lithium alloy

Abstract

The invention provides a sensor for on-line detection of tritium content in liquid lead-lithium alloy. The sensor comprises parts such as a sample chamber, a reference chamber, an electrode, a valve, a work gas tank and a vacuum pump. The diffusion and seepage of tritium in a wall surface of the sample chamber is used, so that the liquid lead-lithium alloy and the tritium in the sample chamber reach the balance; further, the tritium content in the liquid lead-lithium alloy is obtained through measuring the tritium content in the sample chamber. The influence of radioactivity of neutron active products in the liquid lead-lithium alloy on the tritium content is reduced through installing the reference chamber. The sensor provided by the invention has the advantages that (1) the on-line detection of the tritium content in the liquid lead-lithium alloy can be realized; (2) the carrying of extracted tritium in the liquid lead-lithium alloy by carrying gas is avoided, and the detection process is relatively simple; (3) the measurement is directly performed in the sample chamber, and the tritium loss and the stain are reduced; (4) the gamma radiation field in the liquid lead-lithium alloy can be synchronously detected. The sensor is applicable to the on-line detection of the tritium content in a fusion reactor liquid lead-lithium cladded layer loop.

Description

technical field [0001] The invention relates to a tritium measuring sensor, which is suitable for on-line detection of tritium content in a fusion reactor liquid lead-lithium cladding circuit, and belongs to the field of nuclear engineering. Background technique [0002] The rapid on-line measurement of tritium content in the liquid lead-lithium cladding of fusion reactors can provide monitoring means for the extraction of cladding tritium, the calculation of cladding tritium multiplication ratio, and the measurement of fuel consumption of fusion reactions. The traditional detection of tritium content in liquid lead-lithium alloy generally needs to extract and release tritium from liquid lead-lithium alloy first, and then directly measure tritium. However, the tritium produced by the interaction between lithium-6 and neutrons is tightly bound to the lead-lithium alloy, and the release is difficult, requiring special tritium extraction technology. This technology of extracti...

AI Technical Summary

Problems solved by technology

There are still some problems in the design of Amit Sircar, L.Llivina et al., including tritium contamination and penetration loss in the tritium vacuuming and counting measurement system have a great impact on the detection results of tritium content, and the time required for tritium penetration in the sensor to reach equilibrium Longer, the tritium contaminated inside the probe is difficult to decontaminate, resulting in high measurement background, etc.

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