A nucleus fuel with carborundum as inertial base and its making method

A technology for nuclear fuel and silicon carbide, applied in the field of nuclear fuel and its preparation, can solve problems such as unsolvable problems, leaving nuclear hidden dangers, etc., and achieve the effects of good thermal conductivity, stable texture and simple preparation method

Active Publication Date: 2008-05-28
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no reasonable and effective method and means to deal with these wastes. They can only be buried in deep layers after vitrification. However, this method cannot finally solve the problem and will leave nuclear hidden dangers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The silicon carbide inert-based nuclear fuel of this embodiment is: silicon carbide (SiC) is used as a matrix, and erbium oxide (Er), yttrium oxide (Y), plutonium oxide (Pu), and zirconium oxide (Zr) are dispersed in the matrix. Dense fuel pellets with a diameter of 0.06mm and a mass number of 25%, the nuclear fuel is a cylindrical ceramic-ceramic composite fuel pellet.

[0022] The preparation method is as follows:

[0023] 1. Preparation of fuel pellets: 0.15mol of plutonium oxide and 0.05mol of combustible poison erbium oxide were solid-dissolved in 0.03mol of yttrium oxide-stabilized 0.77mol of zirconia, and sintered into dense fuel pellets with a diameter of 0.06mm;

[0024] 2. Mixed compact: After fully mixing 25 wt% sintered fuel pellets with 75 wt% silicon carbide (SiC) powder, press it into a cylindrical green body with a diameter of 5 mm and a length of 6 mm;

[0025] 3. Sintering: The green body is sintered at 2300°C for 3 minutes by electric spark to genera...

Embodiment 2

[0027] The silicon carbide of the present embodiment is the inert-based nuclear fuel: silicon carbide (SiC) is used as a matrix, and gadolinium oxide (Gd), yttrium oxide (Y), plutonium oxide (Pu) and zirconium oxide (Zr) are dispersed in the matrix. It is sintered into dense fuel pellets with a diameter of 0.08mm and a mass number of 35%, and the nuclear fuel is a ring-shaped ceramic-ceramic composite fuel pellet.

[0028] The preparation method is as follows:

[0029] 1. Preparation of fuel pellets: 0.10mol of plutonium oxide and 0.03mol of burnable poison gadolinium oxide were dissolved in 0.03mol of yttrium oxide-stabilized 0.84mol of zirconia, and sintered into dense fuel pellets with a diameter of 0.08mm;

[0030] 2. Mixed compact: 35wt% sintered fuel pellets are fully mixed with 65wt% silicon carbide (SiC) powder, and then pressed into a ring-shaped raw material with a diameter of 8mm, an inner diameter of 3mm, and a length of 9mm. Blank;

[0031] 3. Sintering: The gre...

Embodiment 3

[0033] The silicon carbide of this embodiment is an inert-based nuclear fuel with silicon carbide (SiC) as the matrix, and erbium oxide (Er), yttrium oxide (Y), americium oxide (Am) and zirconium oxide (Zr) are dispersed in the matrix. Dense fuel pellets with a diameter of 0.08mm and a mass number of 15%, the nuclear fuel is a cylindrical ceramic-ceramic composite fuel pellet.

[0034] The preparation method is as follows:

[0035] 1. Preparation of fuel pellets: solid-dissolve 0.15mol of americium and 0.06mol of combustible poison erbium oxide in 0.03mol of yttrium oxide-stabilized 0.76mol of zirconia, and sinter them into dense fuel pellets with a diameter of 0.08mm;

[0036] 2. Mixed compact: After fully mixing 15wt% sintered fuel pellets with 85wt% silicon carbide (SiC) powder, press it into a cylindrical green body with a diameter of 12mm and a length of 12mm;

[0037] 3. Sintering: The green body is sintered at 1800°C for 30 minutes by electric spark to form a ceramic c...

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PUM

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Abstract

The invention provides a nuclear fuel and a preparation method thereof, wherein, the nuclear fuel takes carborundum as an inert basal body. The carborundum inert basal body nuclear fuel equably disperses fuel globules of zirconia fuel to the carborundum basal body, and the mass number dispersed in the carborundum basal body is 5-35 percent. The nuclear fuel is a column-shaped or ring-shaped ceramic-ceramic complex fuel core block. The nuclear fuel has good thermal conduction performance and irradiation-resistant performance, and the chemical durability is high. The preparation method equably disperses fuel globules of zirconia fuel to the carborundum basal body, and then ceramic complex carborundum inert basal body nuclear fuel of the zirconia fuel globules equably dispersed in the carborundum basal body are formed through rapid agglomeration of electric sparks. The carborundum inert basal body nuclear fuel is the safe and environment-friendly nuclear fuel. The preparation method is simple and reliable.

Description

technical field [0001] The invention belongs to a nuclear fuel and a preparation method thereof, in particular to an inert matrix nuclear fuel and a preparation method thereof. Background technique [0002] Inert matrix fuel is a kind of nuclear fuel, which is made of plutonium or actinide elements dispersed in a neutron transparent, radiation and thermophysical properties better than or equivalent to UO 2 In the matrix, and this matrix is ​​geologically stable, that is, the spent fuel used in nuclear reactors does not need to be reprocessed, and can exist stably in nature for a long time. [0003] At present, the research on inert matrix nuclear fuel mainly focuses on the screening, performance research and core research of inert matrix nuclear fuel matrix. According to the principle of nuclear fuel matrix fuel screening, the specific fuel form can be a single-phase material of stabilized ceramics, or a ceramic composite multi-phase material with a mixed phase including th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/64G21C21/02
CPCY02E30/38Y02E30/30
Inventor 刘晓珍邹从沛付道贵王美玲王贯春邓长生简敏
Owner NUCLEAR POWER INSTITUTE OF CHINA
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