Rapid separation method of activated product gallium in fission product

A technology for activation products and fission products, which is applied in separation methods, chemical instruments and methods, separation of different isotopic elements, etc., can solve problems that cannot meet the technical requirements of gallium activation products, and achieve easy control and adjustment, simple process, and reduced Effects of Exposure Dose

Active Publication Date: 2013-08-28
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are still 4-10% of 105Rh and no more than 2% of fission product interference in the gallium product solution. This separation method cannot meet the technical requirements for the neutron energy spectrum analysis of gallium activation products

Method used

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  • Rapid separation method of activated product gallium in fission product
  • Rapid separation method of activated product gallium in fission product
  • Rapid separation method of activated product gallium in fission product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The sample after the fission of the gallium-containing nuclear fuel is dissolved in 20mL3mol / L HCl medium to form a gallium-containing solution and placed in the liquid storage tank 2, and its gamma radioactivity spectrum is as follows: figure 2 shown.

[0068] Control the flow rate at 1mL / min, so that the gallium-containing solution is separated through the first-stage chromatographic adsorption column 201 and the second-stage chromatographic adsorption column 7, wherein the first-stage chromatographic adsorption column is composed of P 204 Chromatography column and Al 2 o 3 Chromatographic column composition, the second stage chromatographic adsorption column is TBP extraction chromatography column, where P 204 The chromatographic column realizes the separation of Ga from Mo, Zr, Al 2 o 3 The chromatographic column realizes the separation of Ga and Te, and the TBP extraction chromatographic column realizes the separation of Ga and Nd, Ba, La, Zr, Nb, Ce, Rh...

Embodiment 2

[0074] P in Example 1 204 Chromatography column 5 with Al 2 o 3 Chromatographic column 6 exchange order before and after, repeat the separation process of embodiment 1, obtain the gamma radioactive measurement source of activated product gallium, the process recovery rate of gallium is 89.2%, to the decontamination factor of fission product as shown in table 1, it can be seen that its superiority at 10 4 , the process takes 90 minutes.

[0075] Table 1 The recovery rate and decontamination factor analysis of activated product gallium

[0076]

[0077] "*" indicates the lower limit of detection assigned for non-detection.

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Abstract

The invention discloses a rapid separation method of activated product gallium in a fission product. The rapid separation method comprises the following steps of: preparation of a gallium-containing radioactive solution, preparation of an eluting solution, filling of a chromatographic separation column, control of flow speed, separation of chromatographic, and the like. The rapid separation method comprises the following specific steps of: carrying out adsorption separation by enabling a radioactive solution which is enriched with the fission product and the activated product gallium to pass through a P2O4 chromatographic column, an Al2O3 chromatographic column and a TBP (Tri-Butyl-Phosphate) extracting chromatographic column at a certain flow speed; washing, desorbing the gallium in the TBP extracting chromatographic column by utilizing a low-acid solution; and further purifying an effluent through an Al2O3 and active carbon mixed column and collecting the purified effluent in a sample bottle to obtain a radioactive measuring solution of the activated product gallium. With the adoption of the rapid separation method disclosed by the invention, the radioactive solution enriched with the fission product and the radioactive solution enriched with the activated product gallium are separated; the recycling rate of the gallium is 80-90%; and the decontamination factor of the fission product is superior to 104 and the separation flow can be finished within 2 hours.

Description

technical field [0001] The invention belongs to the technical field of radiochemical separation of activated products, and specifically discloses a rapid separation method for activated product gallium (Ga) in fission products. Background technique [0002] Activation product analysis is one of the common methods of neutron spectrum analysis in nuclear fuel fission process. The neutron flux and neutron energy in the nuclear fission process can be determined indirectly by analyzing the content and type of activation products. Fissionable materials such as uranium and plutonium are the most commonly used nuclear fuels. In order to increase the processability of plutonium materials, metal gallium (Ga) usually needs to be added, and its content is about 1%. There are two natural isotopes of gallium, Ga-69 (abundance 60.11%) and Ga-71 (abundance 39.89%). In the process of nuclear fuel fission, the activation reactions that gallium can produce mainly include (n, γ) and (n, 2n )r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/26
Inventor 凡金龙卢嘉春师全林刘志超张丽莉余功硕李雪松
Owner NORTHWEST INST OF NUCLEAR TECH
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