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Method for analyzing uranium isotope content under reduction system

An analysis method and isotope technology, applied in the field of radiation environment monitoring, can solve the problems of affecting the reuse of resin, general decontamination effect, and no introduction of resin, etc., to achieve the effect of improving applicability, improving separation and purification effect, and accurate and reliable analysis results

Pending Publication Date: 2021-08-27
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The verification results show that if the standard analysis procedure is operated directly, the removal effect on a small amount of iron is better, and it can not affect the measurement of the α spectrometer, but the decontamination effect on a large amount of iron (tens of milligrams) is average
In addition, the standard does not introduce how to regenerate the resin. It is found that during the process of passing through the column, elemental iodine will precipitate visible to the naked eye in the column part, especially the top of the column, which will affect the effect of iron removal, and it is difficult to remove the iron after separation. Iodine is completely removed, affecting the reuse of resin

Method used

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  • Method for analyzing uranium isotope content under reduction system
  • Method for analyzing uranium isotope content under reduction system
  • Method for analyzing uranium isotope content under reduction system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Verification experiment of actual water samples analyzed for uranium isotope content in reducing system

[0038] Analytical measurements were carried out on four tap water samples, and the results are listed in Table 1.

[0039] Table 1 Analysis results of uranium isotope in tap water samples

[0040]

[0041] Note: The error of the mean value of the results is ±1σ.

[0042] It can be seen from Table 1 that, taking tap water as an example, the established analysis method for uranium isotope content in the reducing system works well, and the precision between the analysis results of parallel samples is high, indicating that the method has good stability and repeatability. The radiochemical recoveries ranged from 81.2% to 93.1%, all better than 80%.

Embodiment 2

[0043] Example 2: Verification experiment of aerosol samples analyzed for uranium isotope content in a reducing system

[0044] Six aerosol samples were collected in different places, and the analysis and measurement were carried out according to the above analysis process, and the results are listed in Table 2.

[0045] Table 2 Analysis results of uranium isotope in aerosol samples

[0046]

[0047] It can be seen from Table 2 that the radiochemical recovery rate for the analysis of uranium isotope content in aerosol samples ranges from 81.7% to 107%, which is better than 80% overall, and the overall performance of the analysis method is stable.

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Abstract

The invention belongs to the technical field of radiation environment monitoring, and relates to a method for analyzing uranium isotope content under a reduction system. The analysis method comprises the following steps: (1) preparing a sample solution; (2) carrying out resin separation; (3) drying by distillation; and (4) measuring. By means of the analysis method for the uranium isotope content under the reduction system, an analysis program recommended by ASTM C1000-11 can be optimized, the analysis method is better suitable for analysis of samples with the high content of iron, plutonium and the like, and it is ensured that the analysis result is accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of radiation environment monitoring and relates to an analysis method for uranium isotope content in a reduction system. Background technique [0002] Uranium has 13 isotopes ( 206 U~ 238 U), all emit alpha or beta rays, some accompanied by gamma rays. 234 U 235 U and 238 U is three natural isotopes of uranium, of which 234 U is 238 daughter of U, 235 U is an important nuclear material, 238 U is mainly used for military use due to its good penetration (high hardness, density). In addition, uranium has three main artificial radionuclides, namely 236 U 233 U and 232 U. 236 U is 240 The daughters of Pu mainly exist in nuclear waste or recycled nuclear fuel; 233 U by 232 Produced by Th irradiation, it is a fissile nuclear material and may be replaced in the future 235 U as the main nuclear material; 232 U is mainly used as a tracer in the process of uranium isotope analysis. [0003] ASTM recom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 李周李鹏翔张静马旭媛韩玉虎师琦琦宋沁楠王瑞俊保莉任晓娜杨海兰易武静高泽全杨有坤杨宇轩
Owner CHINA INST FOR RADIATION PROTECTION
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