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Method for preparing ceramic tritium proliferation agent in fusion stack cladding

A tritium breeder and fusion reactor technology, which is applied in the field of nuclear fusion, can solve the problems that the wet method and the melt spray method are difficult to meet the requirements, and achieve the effects of high sphericity, easy size control and smooth surface.

Inactive Publication Date: 2009-08-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current preparation methods of lithium orthosilicate pellets mainly include wet method and melt spray method, each with its own characteristics. Technology is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1: The particle size is 0.1-2 mm Li 4 SiO 4 Preparation of pellets

[0023] 1. Select an acrylamide gel system, in which acrylamide is the organic monomer, N, N'-methylenebisacrylamide is the cross-linking agent, deionized water is selected as the solvent, and the total concentration of monomer and cross-linking agent accounts for 15%wt of the solution, the mass ratio of the organic monomer to the crosslinking agent is 90:1;

[0024] 2. Add dispersant ammonium citrate to the premix, the dosage is 0.5% of the mass of lithium silicate powder, and at the same time drop ammonia water to adjust the pH value of the premix to 9. Lithium silicate powder is a self-made powder with a particle size of about 1-5 μm. Lithium silicate powder is added to the premixed solution, and the volume percentage of lithium silicate powder is 50%. A low-viscosity slurry was made by ball milling for 15 hours. Then add 0.1% isooctyl alcohol of lithium silicate powder quality to carry o...

example 2

[0028] Example 2: LiAlO with a particle size of 0.1 to 2 mm 2 Preparation of pellets

[0029] 1. Select a methacrylamide gel system, in which methacrylamide is an organic monomer, N, N'-methylenebisacrylamide is a crosslinking agent, and deionized water is selected as a solvent, monomer and crosslinking agent The overall concentration of the solution accounts for 18%wt of the solution, and the mass ratio of the organic monomer to the crosslinking agent is 110:1;

[0030] 2. LiAlO 2 The particle size of the powder is about 1-5 μm, add LiAlO to the premix 2 powder, LiAlO 2 The volume percentage of the powder is 46%, and the dispersant ammonium polyacrylate is added, and the consumption is LiAlO 2 0.7% of the powder mass, while dripping ammonia water to adjust the pH value of the premix to 10. A low-viscosity slurry was made by ball milling for 15 hours. Then add LiAlO 2 0.1% isooctyl alcohol of powder quality carries out defoaming;

[0031] 3. Add the initiator and catal...

example 3

[0034] Example 3: The particle size is 0.1 to 2 mm Li 2 ZrO 3 Preparation of pellets

[0035]1. Select the hydroxyethyl methacrylate gel system, in which hydroxyethyl methacrylate is the organic monomer, N, N'-methylenebisacrylamide is the cross-linking agent, deionized water is selected as the solvent, and the monomer And the overall concentration of crosslinking agent accounts for 22%wt of solution, and the mass ratio of organic monomer and crosslinking agent is 50:1;

[0036] 2. Li 2 ZrO 3 The particle size of the powder is about 1-5 μm, add Li to the premix 2 ZrO 3 Powder, Li 2 ZrO 3 The volume percent content of powder is 44%, adds dispersing agent polyacrylic acid, consumption is Li 2 ZrO 3 1% of the mass of powder, after ball milling for 15 hours to make a low-viscosity slurry. Then add Li 2 ZrO 3 0.1% isooctyl alcohol of powder mass is used for defoaming;

[0037] 3. Add the initiator and catalyst to the above-mentioned ball mill slurry while stirring. The...

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Abstract

The invention relates to a method for preparing a ceramic tritium breeding agent in a fusion reactor blanket, pertaining to the nuclear fusion field, in particular to a technique for preparing the ceramic tritium breeding agent pellets in the fusion reactor blanket. The method is characterized in that: organic monomers that can generate free radical polymerization and a crosslinking agent are mixed and dissolved with water or an organic solvent to prepare a pre-mixed solution, then ceramic tritium breeding agent powder is added and an initiator and a catalyst are added after defoaming treatment so as to prepare a slurry; the slurry is dripped into a medium by using a dripping device and the medium is in the state of being heating and is exclusive to the solvent used in the slurry. After entering the medium, the dripping liquid takes the form of pellet, solidifies and maintains the shape during the dropping process; the pellet is collected, cleaned, dried and sintered into the tritium breeding agent ceramic pellet material. The formed blanket has high strength and toughness; the formed pellet has high degree of sphericity, smooth surface and good evenness; the shrinkage after drying and sintering are slight, the size of the pellet is easy to be controlled and the strength is high; additionally, the cost is relatively low and the technique is flexible.

Description

technical field [0001] The invention belongs to the field of nuclear fusion, in particular to a preparation process for ceramic tritium multiplication agent pellets in fusion reactor cladding. Background technique [0002] Facing the problems of human energy shortage and deteriorating environment, clean, safe and renewable fusion energy has attracted much attention. Materials that capture DT fusion neutrons and produce tritium are called tritium breeders. Tritium breeders generally use lithium-containing materials, which are divided into liquid and solid. Commonly used solid-state tritium breeders include Li 2 O and ternary lithium ceramics——γ-LiAlO 2 , Li 2 ZrO 3 , Li 2 TiO 3 and Li 4 SiO 4 wait. Due to the good chemical stability of the solid breeder, it can be used at higher temperatures and the tritium is easy to extract, so it has become a common candidate material for the experimental cladding tritium breeder of the International Thermonuclear Experimental Re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21B1/11
CPCY02E30/10
Inventor 邵慧萍金浩楠郭志猛林涛罗骥郝俊杰
Owner UNIV OF SCI & TECH BEIJING
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