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Preparation method of simulated radioactive waste liquid

A technology of radioactive waste liquid and preparation method, which is applied in the field of simulated radioactive waste liquid preparation, and can solve problems such as easy deposition on the bottom of the container or in the delivery pipeline for preparing simulated radioactive waste liquid, blockage of the control valve of the delivery pipeline, difficulty in dissolving, etc.

Pending Publication Date: 2021-10-01
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, when preparing simulated radioactive waste liquid, all chemical reagents are usually dissolved in a container, and most of the simulated radioactive waste liquid contains phosphorus, titanium and other elements at the same time. Titanium and phosphorus will form titanium phosphate and other elements in the simulated waste liquid. Complex insoluble precipitate, once formed, it is extremely difficult to dissolve, and it is easy to deposit at the bottom of the container or in the pipeline for preparing simulated radioactive waste liquid, and even cause blockage of the pipeline or control valves

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  • Preparation method of simulated radioactive waste liquid
  • Preparation method of simulated radioactive waste liquid
  • Preparation method of simulated radioactive waste liquid

Examples

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Embodiment 1

[0089] The actual radioactive waste liquid contains elements such as iron, phosphorus, titanium, strontium, cesium, manganese, hydrogen, etc. Among them, the content of phosphorus is relatively small, and the content of iron is relatively high. When preparing simulated radioactive waste liquid, metal salts such as iron salts, strontium salts, cesium salts, and manganese salts are first dissolved in deionized water, and then nitric acid and phosphoric acid are added to obtain the first solution, so that the first solution contains all other elements. The titanium salt was then dissolved in deionized water to obtain a second solution. Wherein, the addition amount of each metal salt and each acid liquid is determined according to the concentration of the actual radioactive waste liquid. Finally, under stirring, the first solution and the second solution were mixed, and deionized water was used to make up the volume to obtain a simulated radioactive waste liquid.

[0090] It sho...

Embodiment 2

[0093] The actual radioactive waste liquid contains elements such as molybdenum, iron, phosphorus, titanium, strontium, cesium, hydrogen, etc. Among them, the content of phosphorus is relatively small, and the content of iron is relatively large. When preparing simulated radioactive waste liquid, first dissolve metal nitrates such as iron salts, strontium salts, and cesium salts in deionized water, and then add nitric acid and phosphoric acid to obtain the first solution, so that the first solution contains All other elements. The titanium salt was dissolved in deionized water to obtain a second solution. The metal molybdenum is dissolved in the diluted hydrogen peroxide solution (eg 6% hydrogen peroxide solution) to obtain the third solution. Wherein, the addition amount of metal molybdenum, each metal salt and each acid solution is determined according to the concentration of each component in the actual radioactive waste liquid. Finally, under stirring, the second solutio...

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Abstract

The embodiment of the invention discloses a preparation method of simulated radioactive waste liquid. The simulated radioactive waste liquid at least contains a first component, a second component and a third component. The method comprises the steps of preparing a first solution, wherein the first solution at least comprises the first component and the second component, and the first component and the second component are subjected to a complexation reaction so as to shield the first component; preparing a second solution, wherein the second solution comprises the third component; and mixing the first solution and the second solution to obtain the simulated radioactive waste liquid, wherein the contact of the first component and the third component can produce a precipitate. According to the embodiment of the invention, the complexation reaction of the second component and the first component is utilized to mask the first component, so that the precipitation reaction of the first component and the third component is inhibited, and the formation of precipitates in the simulated radioactive waste liquid is slowed down.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of radioactive waste liquid treatment, in particular to a method for preparing simulated radioactive waste liquid. Background technique [0002] At present, my country is in a period of rapid development of nuclear energy, and a large amount of radioactive waste is bound to be produced in the nuclear industry. Among them, radioactive waste liquid, especially high-level radioactive waste liquid, has the characteristics of high radioactive specific activity, complex composition, strong acidity, strong corrosiveness, and contains some nuclides with long half-life and high biological toxicity. Handling and disposal is particularly important. Proper treatment of radioactive waste liquid can minimize the impact of radioactive waste liquid on the environment. [0003] Among the treatment technologies of radioactive waste liquid, cold crucible vitrification technology has unique advantage...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/38
CPCG01N1/28G01N1/38
Inventor 汪润慈李扬郄东生李玉松常煚李宝军张克乾
Owner CHINA INSTITUTE OF ATOMIC ENERGY