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Method for preparing ZrO2-Gd2O3 burnable poison material

A technology for toxic materials and slurry, which is applied in the field of preparing ZrO2-Gd2O3 combustible toxic materials by mixing and forming one-step method, can solve the problems of uneven distribution of components and free agglomeration, and achieve uniform distribution, good compactness and tight arrangement. Effect

Active Publication Date: 2014-05-21
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation ZrO 2 -Gd 2 o 3 The method of combustible poison materials solves the problem of uniform distribution of several materials, overcomes the phenomenon of uneven distribution of components and free agglomeration of materials prepared in traditional preparation methods, and improves the uniformity of fuel

Method used

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  • Method for preparing ZrO2-Gd2O3 burnable poison material
  • Method for preparing ZrO2-Gd2O3 burnable poison material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of preparation ZrO 2 -Gd 2 o 3 The method of burning the poisonous material is carried out according to the following steps:

[0024] (A) In parts by weight, add 1 part of organic monomer chitosan (β-1,4-poly-glucosamine) to 100 parts of dilute acetic acid solution with a content of 1 vol%, to form a premix;

[0025] (B) 700 parts of ZrO with any weight ratio 2 and Gd 2 o 3 The mixed powder and 500 parts of grinding balls were added to the ball mill for 5 hours of ball milling to disperse, and the ZrO with a solid phase content of 53vol% and a viscosity of 500mPa·s was prepared. 2 -Gd 2 o 3 slurry;

[0026] (C) to the ZrO prepared in step (B) 2 -Gd 2 o 3 Add 5 parts of cross-linking agent in the slurry, and cross-linking agent is the glutaraldehyde (C 5 h 8 o 2 ) solution, mix well;

[0027] (D) Add the mixture prepared in step (C) into the mold of the desired shape, and after 40Min, the organic monomer chitosan (β-1,4-poly-glucosamine) and the cross...

Embodiment 2

[0031] A kind of preparation ZrO 2 -Gd 2 o 3 The method of burning the poisonous material is carried out according to the following steps:

[0032] (A) In parts by weight, add 0.5 parts of organic monomer chitosan (β-1,4-poly-glucosamine) to 100 parts of dilute acetic acid solution with a content of 1 vol%, mix well, and prepare a premix;

[0033] (B) 600 parts of ZrO with any weight ratio 2 and Gd 2 o 3 The mixed powder and 500 parts of grinding balls were added to the ball mill for 1h dispersion, and ZrO with a solid phase content of 50vol% and a viscosity of 300mPa·s was prepared. 2 -Gd 2 o 3 slurry;

[0034] (C) to the ZrO prepared in step (B) 2 -Gd 2 o 3 Add 1 part of cross-linking agent in the slurry, and cross-linking agent is the glutaraldehyde (C 5 h 8 o 2 ) solution, mix well;

[0035] (D) Add the mixture prepared in step (C) into the mold of the desired shape, and after 60Min, the organic monomer chitosan (β-1,4-poly-glucosamine) and the cross-linking...

Embodiment 3

[0039] A kind of preparation ZrO 2 -Gd 2 o 3 The method of burning the poisonous material is carried out according to the following steps:

[0040] (A) In parts by weight, add 1.5 parts of organic monomer chitosan (β-1,4-poly-glucosamine) to 100 parts of dilute acetic acid solution with a content of 1vol%, mix well, and prepare a premix;

[0041] (B) 800 parts of ZrO with any weight ratio 2 and Gd 2 o 3 The mixed powder and 500 parts of grinding balls were added to the ball mill for ball milling for 8h to disperse, and ZrO with a solid phase content of 56vol% and a viscosity of 700mPa·s was prepared. 2 -Gd 2 o 3 slurry;

[0042] (C) to the ZrO prepared in step (B) 2 -Gd 2 o 3 Add 10 parts of cross-linking agent in the slurry, and cross-linking agent is the glutaraldehyde (C 5 h 8 o 2 ) solution, mix well;

[0043] (D) Add the mixture prepared in step (C) into the mold of the desired shape, and after 20Min, the organic monomer chitosan (β-1,4-poly-glucosamine) an...

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Abstract

The invention discloses a method for preparing a ZrO2-Gd2O3 burnable poison material. The method comprises the following steps: (A) preparing a premixed solution; (B) ball-milling and dispersing mixed powder of ZrO2 and Gd2O3 to prepare slurry; (C) adding a cross-linking agent, and uniformly mixing; (D) adding into a mould with the needed shape, and generating into polymer gel to obtain ZrO2-Gd2O3 material green pellets; (E) drying the green pellets; and (F) sintering in the oxidation atmosphere. The method adopts the steps and utilizes a wet mixing and slurry coagulation single-step method to prepare the ZrO2-Gd2O3 burnable poison material. The limited problem of uneven distribution of several kinds of materials in dry mixing of the traditional method is solved, the equipment and the process are simplified, the distribution uniformity of the burnable poison material is ensured, and the problems of uneven distribution and free aggregation are solved.

Description

technical field [0001] The invention relates to a method for preparing fuel in the nuclear industry, in particular to a method for preparing ZrO by one-step mixing and forming. 2 -Gd 2 o 3 Methods of Burning Poisonous Materials. Background technique [0002] Deep burnup, long cycle, and low leakage are the essence of modern PWR core fuel management optimization. In developed countries with nuclear power, the target of regional average unloading fuel consumption of fuel in operation is 45GWd / t, and the unloading fuel consumption of the new generation of fuel assemblies is expected to reach 55GWd / t, or even higher; the cycle length of most power plants Reach 15 to 20 months, and the design requirement for advanced power plants is already 24 months. These goals not only require higher fuel performance, but also make the role of burnable poisons in the reloading core very important. It is essential to provide sufficient quantities of burnable poisons to achieve long-term rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C21/00C04B35/622C04B35/48C04B35/50
CPCY02E30/30
Inventor 许奎左国平乔慧武杨静易伟代胜平刘海唐明国
Owner NUCLEAR POWER INSTITUTE OF CHINA
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