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Method for simulating corrosivity of radioactive real feed liquid in nuclear fuel post-treatment, and simulated feed liquid

A radioactive and nuclear fuel technology, applied in the fields of weather resistance/light resistance/corrosion resistance, analytical materials, measuring devices, etc., can solve the problems of inability to use post-processing real material liquid simulation operation test, high radioactivity and toxicity, and complex composition of post-processing material liquid and other problems, to achieve the effect of low price, easy preparation and wide sources

Active Publication Date: 2021-08-13
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition, high radioactivity and toxicity of the after-treatment feed liquid, it is impossible to use the real feed liquid of the post-treatment as the test feed liquid for the simulated operation test. How to select the simulated operation test feed liquid is a difficult point for the simulated operation test

Method used

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  • Method for simulating corrosivity of radioactive real feed liquid in nuclear fuel post-treatment, and simulated feed liquid
  • Method for simulating corrosivity of radioactive real feed liquid in nuclear fuel post-treatment, and simulated feed liquid
  • Method for simulating corrosivity of radioactive real feed liquid in nuclear fuel post-treatment, and simulated feed liquid

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Embodiment 1

[0040] This embodiment provides a method for simulating the corrosivity of radioactive real material liquid for nuclear fuel reprocessing, including the following steps:

[0041] Based on the real feed liquid composition in nuclear fuel reprocessing, determine the elements that need to be simulated in the real feed liquid, use the same or similar oxidation-reduction potential ions for simulation, replace the elements that need to be simulated with other non-radioactive ions, and determine the elements in the simulated feed liquid. elements added to obtain a simulated feed solution for corrosion tests. The simulated feed liquid is subjected to a corrosion test to simulate the corrosiveness of the real feed liquid for nuclear fuel reprocessing radioactivity.

[0042] This embodiment also provides a simulated feed liquid for simulating the corrosivity of the radioactive real feed liquid for reprocessing nuclear fuel, which is obtained by the above-mentioned method for simulating ...

Embodiment 2

[0047] This embodiment provides a method for simulating the corrosivity of radioactive real material liquid for nuclear fuel reprocessing, including the following steps:

[0048] Determination of the types of main fragment elements in spent fuel elements of nuclear fuel reprocessing objects. The dissolver is initially pure nitric acid solution, and the spent fuel elements are added into the dissolver. As the dissolution progresses, the concentration of each element gradually increases. When the end of the dissolution is reached, the concentration of each element reaches the maximum. The main split elements are Pu, Ce , Ru, Pd, Np, Rh, Am, Cm, Cr, Pr.

[0049] Based on the real material liquid composition in nuclear fuel reprocessing, determine the elements that need to be simulated in the real material liquid, use the same or similar oxidation-reduction potential ions for simulation, and replace the elements that need to be simulated with other non-radioactive ions, including Pu...

Embodiment 3

[0051] This embodiment provides a method for simulating the corrosivity of radioactive real material liquid for nuclear fuel reprocessing, including the following steps:

[0052] Determination of the types of main fragment elements in spent fuel elements of nuclear fuel reprocessing objects. Based on the real feed liquid composition in nuclear fuel reprocessing, determine the elements that need to be simulated in the real feed liquid. The Pu and Np in the nuclear fuel reprocessing solution have specific contents, the mass ratio of Pu and Np is (5:1)~(60:1), the total amount of Am, Cm, Ce and Pr elements is 0.01~65g / L, and The mass ratio of Am, Cm and Pr is (2~30):1:(5~65), the total amount of Ru, Rh and Pd elements is 0.01~80g / L, and the mass ratio of Ru, Rh and Pd is ( 1~25): 1:(1~25), the total content of Cr element is 0.01~60g / L, and the concentration of nitric acid is 1~10mol / L.

[0053] Use the same or similar oxidation-reduction potential ions to simulate, replace the ...

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Abstract

The invention discloses a method for simulating the corrosivity of a radioactive real feed liquid in nuclear fuel post-treatment and a simulated feed liquid. The method comprises the following steps of on the basis of the composition of the real feed liquid in nuclear fuel post-treatment, determining elements needing to be simulated in the real feed liquid, performing simulation by adopting ions with the same or similar oxidation-reduction potential, replacing the elements needing to be simulated with other non-radioactive ions, and determining the elements added in the simulated feed liquid to obtain the simulated feed liquid for carrying out the corrosion test. The corrosion property of the simulated feed liquid for the nuclear fuel post-treatment dissolution and evaporation process can simulate the real feed liquid condition to the greatest extent, the corrosion of the simulated feed liquid is close to that of a real post-treatment environment, and verification of a corrosion resistance test of subsequent key equipment is facilitated. The simulated feed liquid for the nuclear fuel aftertreatment dissolution and evaporation process is wide in raw material source, easy to prepare and low in price.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel reprocessing, and in particular relates to a method for simulating the corrosivity of radioactive real material liquid for nuclear fuel reprocessing and the simulated material liquid. Background technique [0002] The most common problem in nuclear fuel reprocessing is the corrosion of key equipment materials. The key equipment for nuclear fuel reprocessing works in a highly radioactive and corrosive environment. Due to the particularity of the post-processing operating environment, there are higher requirements for the safety and reliability of key equipment. A new material is used for post-processing key equipment. In addition to using conventional corrosion test methods to study the corrosion resistance of materials, it is also necessary to According to the characteristics of the post-processing operating environment, a simulated operation test is carried out to study the corrosion resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00Y02E30/30
Inventor 李银华储凌王博胡彦涛李思凡陈勇李鑫史继红
Owner CHINA NUCLEAR POWER ENG CO LTD