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Method for determining plutonium concentration and plutonium isotope components in plutonium dissolving solution to be detected by using gamma energy spectrum

A technology of gamma energy spectroscopy and solution, applied in the field of nuclear material analysis, can solve the problems of low analysis efficiency and incomplete plutonium analysis, and achieve the effect of rapid and accurate analysis

Inactive Publication Date: 2020-09-29
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0004] The embodiment of the present invention provides a method for determining the plutonium concentration and plutonium isotope composition in the plutonium solution to be tested by using gamma energy spectroscopy, which solves the problems of incomplete plutonium analysis and low analysis efficiency in related technologies

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  • Method for determining plutonium concentration and plutonium isotope components in plutonium dissolving solution to be detected by using gamma energy spectrum
  • Method for determining plutonium concentration and plutonium isotope components in plutonium dissolving solution to be detected by using gamma energy spectrum
  • Method for determining plutonium concentration and plutonium isotope components in plutonium dissolving solution to be detected by using gamma energy spectrum

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Embodiment 1

[0076] The method for determining the plutonium concentration and plutonium isotope composition in the plutonium solution to be tested by using gamma energy spectroscopy comprises the following steps:

[0077] (1) Weigh 30 mg of plutonium sample, dissolve it with 2.5-3.0 mol / L nitric acid, divide the dissolved solution into 6 weighing cups, and weigh them separately so that each unit sample contains about 5 mg of plutonium ;

[0078] Use the potentiometric titration method to calibrate the plutonium concentration in the plutonium isotope diluent solution, and use ICP-MS to calibrate the plutonium isotope composition in the plutonium isotope diluent solution, specifically:

[0079] Take 2 samples of the above units, and use a mass spectrometer to measure the 2 samples repeatedly 5 to 7 times to obtain the plutonium isotope diluent solution. 239 The weight percentage of Pu, denoted as W s 9 ; while obtaining the plutonium isotope diluent solution 240 Pu / 239 The ratio of Pu...

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Abstract

The embodiment of the invention provides a method for determining plutonium concentration and plutonium isotope components in a plutonium dissolving solution to be detected by using a gamma energy spectrum. The method comprises the following steps: S1, dissolving a plutonium sample to prepare a plutonium isotope diluent solution whose plutonium concentration and plutonium isotope components are predetermined; S2, adsorbing a plutonium dissolving solution to be detected by using resin to obtain resin for adsorbing the plutonium dissolving solution to be detected; S3, measuring the plutonium isotope ratio of the resin for adsorbing the plutonium dissolving solution to be detected obtained in the S2 by utilizing a gamma spectrum; calculating and determining plutonium isotope components in theplutonium dissolving solution to be detected according to the measured plutonium isotope ratio; S4, mixing the plutonium isotope diluent solution with a plutonium dissolving solution to be detected to obtain a mixed solution, and adsorbing the mixed solution by using resin to obtain resin for adsorbing the mixed solution; S5, determining the plutonium isotope ratio of the resin for adsorbing themixed solution obtained in the S4 by utilizing gamma spectroscopy; and S6, carrying out calculating to determine the plutonium concentration in the plutonium dissolving solution to be detected. The method provided by the embodiment of the invention can realize rapid and accurate analysis of plutonium.

Description

technical field [0001] The invention relates to the technical field of nuclear material analysis, in particular to a method for determining plutonium concentration and plutonium isotope composition in a plutonium solution to be tested by using gamma energy spectrum. Background technique [0002] Plutonium is an important nuclear material that needs to be analyzed during processes such as the plutonium fuel cycle, processing and waste disposal. Commonly used methods for determining plutonium isotopic abundance include mass spectrometry. However, mass spectrometry has the disadvantages of long working cycle and high requirements for operators, which is not conducive to the rapid and accurate measurement of plutonium. [0003] Of course, the determination of plutonium isotope abundance can also use gamma energy spectroscopy to achieve rapid and accurate measurement. However, in some application scenarios, such as spent fuel solution in reprocessing plants or the solution in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00
CPCG01N23/00
Inventor 王妍刘宏斌张小枝何丽霞杨群苗强步立新方忻许小明柏磊
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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