Boron carbide doped fuel pellet and production method thereof

A technology for fuel pellets and a manufacturing method, which is applied to chemical instruments and methods, reactor fuel materials, reactor fuel elements, etc., can solve the problems of easy volatilization, reduced high temperature stability of IMDP pellets, difficult and precise control of the content of combustible poisons, etc. Achieving the effect of broad industrial prospects

Inactive Publication Date: 2018-06-19
GUANGDONG NUCLEAR POWER JOINT VENTURE +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. Directly mixed with Er 2 o 3 The powder does not reduce the content of TRISO microspheres in the SiC matrix, but it will form a compound with the NITE sintering aid doped in the SiC matrix, increase the volume content of the second phase compound with a low melting point, and reduce the high temperature stability of the IMDP pellet;
[0009] 4. Gd 2 o 3 and Er 2 o 3 The compound with low melting point formed with the NITE phase in the SiC matrix is ​​volatile during the sintering process, and the content of the added combustible poison is not easy to accurately control

Method used

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  • Boron carbide doped fuel pellet and production method thereof
  • Boron carbide doped fuel pellet and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Weigh the following formula raw materials:

[0065] The first formula: Y with a particle size of 20nm 2 o 3 Powder 1.8wt.%, Al with a particle size of 10nm 2 o 3 Powder 3wt.%, SiO with particle size 10nm 2 Powder 1.2wt.%, particle size 0.5μm B 4 C powder 0.5wt.%; the rest is SiC powder with a particle size of 100nm.

[0066] The second formula: Y with a particle size of 20nm 2 o 3 Powder 1.8wt.%, Al with a particle size of 10nm 2 o 3 Powder 3wt.%, SiO with particle size 10nm 2 Powder 1.2wt.%; the remainder is SiC powder with a particle size of 100nm.

[0067] The raw material powders of the two formulations and ethanol with 2 times the mass were respectively placed in a nylon ball mill jar, polyethyleneimine (1wt.% of the raw material powder) was added, and ball milled on a planetary ball mill for 24 hours to form the first mixed material and the second mix.

[0068] Weigh 5-20wt.% of the first mixed material and mix it evenly in ethanol to form a slurry, sp...

Embodiment 2

[0072] The first formula: Y with a particle size of 20nm 2 o 3 Powder 3wt.%, Al with a particle size of 10nm 2 o 3 Powder 5wt.%, SiO with particle size 10nm 2 Powder 4wt.%, B with particle size 0.5μm 4 C powder 5wt.%; the remainder is SiC powder with a particle size of 100nm.

[0073] The second formula: Y with a particle size of 20nm 2 o 3 Powder 3wt.%, Al with a particle size of 10nm 2 o 3 Powder 5wt.%, SiO with particle size 10nm 2 Powder 4wt.%; the rest is SiC powder with a particle size of 100nm.

[0074] The raw material powders of the two formulations and ethanol with 2 times the mass were respectively placed in a nylon ball mill jar, polyethyleneimine (1wt.% of the raw material powder) was added, and ball milled on a planetary ball mill for 24 hours to form the first mixed material and the second mix.

[0075] Weigh 5-20wt.% of the first mixed material and mix it evenly in ethanol to form a slurry, spray the slurry on the surface of the rolling TRISO particl...

Embodiment 3

[0079] The first formula: Y with a particle size of 20nm 2 o 3 Powder 3.6wt.%, Al with a particle size of 10nm 2 o 3 Powder 6wt.%, SiO with particle size 10nm2 Powder 2.4wt.%, particle size 0.5μm B 4 C powder 15wt.%; the remainder is SiC powder with a particle size of 1 μm.

[0080] The second formula: Y with a particle size of 20nm 2 o 3 Powder 3.6wt.%, Al with a particle size of 10nm 2 o 3 Powder 6wt.%, SiO with particle size 10nm 2 Powder 2.4wt.%; the remainder is SiC powder with a particle size of 1 μm.

[0081] The raw material powders of the two formulations and ethanol with 2 times the mass were respectively placed in a nylon ball mill jar, polyethyleneimine (1wt.% of the raw material powder) was added, and ball milled on a planetary ball mill for 24 hours to form the first mixed material and the second mix.

[0082] Weigh 5-20wt.% of the first mixed material and mix it evenly in ethanol to form a slurry, spray the slurry on the surface of the rolling TRISO pa...

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Abstract

The invention discloses a boron carbide doped fuel pellet and a production method thereof. The production method comprises the steps as follows: S1, raw materials of a first formula and a second formula are weighed respectively in percentage by mass; S2, the raw materials of the first formula and the second formula are mixed with ethanol respectively, then, polyethylenimine is added, the mixture is uniformly mixed through ball milling, and a first mixture and a second mixture are formed respectively; S3, 5%-20% of the first mixture is uniformly mixed in ethanol to form slurry, the slurry is sprayed on rolling TRISO particle surfaces, and to-be-pressed powder is formed after drying; S4, the second mixture is subjected to mold pressing to form a tube biscuit; S5, the to-be-pressed powder ispressed into a core biscuit in advance, the core biscuit is assembled in the tube biscuit, compact sintering is performed, and the boron carbide doped fuel pellet is obtained; or the to-be-pressed powder is put in the tube biscuit and subjected to mold pressing to form the core biscuit matched in the tube biscuit, compact sintering is performed, and the boron carbide doped fuel pellet is obtained.The neutron economy of the fuel pellet is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel, in particular to a method for manufacturing a boron carbide-doped fuel pellet and the boron carbide-doped fuel pellet. Background technique [0002] Nuclear fuel has a high energy density, CO 2 Low emissions of harmful gases are an important means to solve the current shortage of petrochemical resources and serious environmental pollution. Nuclear power generation is a clean energy source. Nuclear energy has obvious advantages. The proportion of nuclear power energy continues to increase. Develop nuclear energy and build new nuclear power plants. However, nuclear energy uses the fission of heavy metal elements such as uranium to generate energy, and fission will form fission products with certain radioactivity. Therefore, doing a good job in radiation protection and preventing the leakage of radioactive products is the key to the safety of nuclear power and the prerequisite for the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/62G21C3/64
CPCG21C3/623G21C3/626G21C3/64C04B35/575C04B35/62834C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/5454C04B2235/5445C04B2235/5409C04B2235/77B32B18/00C04B2237/84Y02E30/30
Inventor 黄华伟严岩刘彤李锐任啟森孙茂州马赵丹丹薛佳祥龚星高思宇郭达禧
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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