A method for analyzing and detecting tritium produced by liquid lead-lithium alloy neutron irradiation

A detection method, lithium alloy technology, applied in the analysis of materials, material analysis by electromagnetic means, measurement devices, etc., can solve the problems that have not yet been verified by experiments, difficult, difficult quantitative analysis, etc., and achieve low protection requirements and easy operation , the effect of high measurement accuracy

Inactive Publication Date: 2017-09-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The Bhabha Atomic Research Center in India has theoretically studied the working boundary conditions of the gas bubbling column method and the packed column method, and believes that the latter has a higher recovery efficiency, but has not yet been experimentally verified
Therefore, it is difficult to measure the total amount of tritium produced by these analytical methods that need to extract and release tritium from liquid lead-lithium alloys
In addition, tritium has a strong diffusion ability, and it is difficult to quantitatively analyze the tritium trapped in the cladding structure material and cladding system space due to penetration

Method used

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  • A method for analyzing and detecting tritium produced by liquid lead-lithium alloy neutron irradiation

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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, an analysis and detection method for measuring the amount of tritium produced by neutron irradiation of liquid lead-lithium alloys, including sampling, sample dissolution, separation and purification of lead and lithium, transformation of lithium-containing solution medium system, coulomb analysis, mass spectrometry analysis and data processing Each step, each step is as follows:

[0038] (1) The sampling step realizes representative sampling from the liquid lead-lithium alloy;

[0039] (2) The sample dissolution step realizes the dissolution of the lead-lithium alloy sample;

[0040] (3) The separation and purification step of lead and lithium realizes the separation of lithium and lead;

[0041] (4) The conversion step of the lithium-containing solution medium system realizes that the lithium-containing solution is converted from a nitric acid medium to a hydrochloric acid medium;

[0042] (5) Coulomb analysis step realizes lithium conten...

Embodiment 2

[0061] The sources of uncertainty in this analysis and detection method are analyzed, mainly including three aspects:

[0062] (1) The controlled potential coulometric method measures the lithium content in the lithium chloride solution, and the relative standard deviation is less than 0.5%.

[0063] (2) The lithium isotope abundance in the lithium chloride solution is measured by thermal surface ionization mass spectrometry, and the relative standard deviation is less than 0.3%.

[0064] (3) The repeatability standard deviation of the analytical detection method is 0.8%.

[0065] Combining the above three main uncertain components, the analytical detection method of the present invention has a combined relative standard deviation of 1%. Parts not described in detail in the present invention are well-known techniques of those skilled in the art.

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Abstract

The invention relates to an analysis and detection method for the amount of tritium produced by liquid lead-lithium alloy neutron irradiation, including sampling, sample dissolution, separation and purification of lead and lithium, transformation of lithium-containing solution medium system, coulomb analysis, mass spectrometry analysis and data processing. step. The invention has the advantages of simple sample pretreatment procedure, high analysis result precision and the like. Since tritium is not directly measured, it is not necessary to extract and release tritium from the liquid lead-lithium alloy, which avoids the problem that tritium is closely combined with the liquid lead-lithium alloy and difficult to release. The main measurement value of the present invention is the isotope abundance ratio of lithium, and the diffusion, dissolution and retention of lithium atoms in the system space will not affect the measurement results of the tritium production of the liquid lead-lithium alloy, so the present invention overcomes the traditional direct measurement method that cannot be measured Problems with tritium entrapment and permeation in liquid lead-lithium alloy cladding systems for fusion reactors.

Description

technical field [0001] The invention relates to an analysis and detection method for the amount of tritium produced by neutron irradiation of liquid lead-lithium alloy, which can be used to realize the measurement of the amount of tritium produced by neutron irradiation of liquid lead-lithium alloy. Background technique [0002] Accurately measuring the amount of tritium produced in the liquid lead-lithium alloy cladding of a fusion reactor is an important content of the fusion reactor tritium material balance study. provide means of monitoring. [0003] The traditional tritium analysis method is applied to the measurement of tritium in liquid lead-lithium alloys. Generally, it is necessary to extract and release tritium from the liquid lead-lithium alloy first, and then directly measure tritium. but 6 The tritium produced by the interaction of Li and neutrons is closely combined with the liquid lead-lithium alloy, and it is difficult to release, which requires special tri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/42G01N27/62G01N1/34G01N27/626
Inventor 梅华平黄群英吴庆生陈建伟韩骞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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