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a high abundance 93 The preparation method of zr

A high-abundance, high-concentration technology, applied in the field of radionuclide preparation, can solve problems such as the inability to meet the requirements of isotope enrichment, and achieve the effect of simple method and reasonable separation process

Active Publication Date: 2016-08-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the separation process, conventional methods for the preparation of high-abundance nuclides mainly include electromagnetic separation, gas diffusion, centrifugation, laser, chemical exchange, etc., but these methods are generally suitable for isotope enrichment of stable nuclides. , for radionuclides 93 For Zr, due to its decay characteristics with time and the complexity of the system in the preparation process, conventional separation methods cannot meet the requirements of isotope enrichment, so special methods must be used to prepare different purity, especially high-abundance radioactive isotopes 93 Zr

Method used

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  • a high abundance <sup>93</sup> The preparation method of zr
  • a high abundance <sup>93</sup> The preparation method of zr
  • a high abundance <sup>93</sup> The preparation method of zr

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Effect test

Embodiment 1

[0040] a high abundance 93 The preparation method of Zr, this method comprises the following steps:

[0041] (1) Take 1mg 235 The uranyl solution of U was placed in a quartz tube, dried under an infrared lamp, and sealed. Placed at a neutron fluence rate of 7×10 11 n / cm 2 / s reactor, irradiated for 6 hours, cooled for 20 hours, dissolved with 0.5mol / L HCl.

[0042] (2) Transfer all the solution to the HDEHP extraction resin column. After the upper column liquid is drained, wash 6 column volumes with 0.5mol / L HCl, 2 column volumes with 1mol / L HCl, and desorb with 4mol / L HCl 4 column volumes, collect the desorption liquid in the extraction tube; the HDEHP extraction resin used is 80 mesh.

[0043] (3) After adjusting the desorption liquid to 8mol / L HCl medium, transfer it to the TBP extraction resin column. After the upper column liquid is drained, wash 1 column volume with 8mol / L HCl, and collect the upper column liquid and washing liquid in In the extraction tube; the pa...

Embodiment 2

[0050] Identical with method, step in embodiment 1, difference is described in step (1) 235 U solid for U 3 o 8 Powder, neutron irradiation time is 8h, U target cooling time is 25h, the dissolving liquid used for dissolving U target is aqua regia and converted into 0.5mol / L hydrochloric acid medium after dissolving;

[0051] The HDEHP extraction resin used is 100 mesh, the particle diameter of the TBP extraction resin in step (4) is 180 μm, and the anion exchange resin in step (5) is 100 mesh.

[0052] High abundance prepared by this method 93 Zr, 93 Zr / 94 Zr is 2.9*10 6 .

Embodiment 3

[0054] Same as method and step in Example 1, except that the time of step (1) neutron irradiation is 10h, and the U target cooling time is 30h;

[0055] The HDEHP extraction resin used is 120 mesh, the particle diameter of the TBP extraction resin in step (4) is 210 μm, and the anion exchange resin in step (5) is 120 mesh.

[0056] High abundance prepared by this method 93 Zr, 93 Zr / 94 Zr is 3.5*10 6 .

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Abstract

The invention belongs to the technical field of preparation of radioactive nuclide, and particularly relates to a preparation method for high-abundance 93Zr. The method comprises the following steps: firstly, separating pure 93Y by a two-step delay method, performing neutron irradiation for 6-10 hours on a 235U target to generate an appropriate amount of 93Y, cooling the 93Y for 20-30 hours, enabling 94Y to furthest grow into 94Zr, then performing separation of Y, Zr and U, so that the 93Y which conforms to requirements after purification can be obtained, and generating 93Zr through disintegration of the obtained 93Y to finally obtain a high-abundance 93Zr sample. The method has the advantages that the operation is simple, consumed time is shorter, and 93Zr / 94Zr in the prepared sample is greater than 106.

Description

technical field [0001] The invention belongs to the technical field of radionuclide preparation, in particular to a high-abundance 93 The preparation method of Zr. Background technique [0002] Nuclear parameters of radionuclides are very important basic data. With the rapid development of nuclear technology and nuclear chemistry, the requirements for the accuracy of nuclear parameter data are getting higher and higher. In order to accurately measure the neutron activation method 93 Zr(n,γ) 94 The thermal neutron cross section data of Zr must be prepared with high abundance 93 Zr samples, where for 93 Zr / 94 The ratio of Zr is required to be 10 6 above. [0003] does not exist in nature 93 Zr can only be considered for separation from fission products, and the Zr isotopes present in the fission products are listed in Table 1. [0004] Table 1 Isotopes of Zr in fission products [0005] [0006] As can be seen from Table 1, the fission product is a mixture of al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/14
Inventor 杨金玲丁有钱张生栋孙宏清马鹏
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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