ZrC inert matrix dispersed pellet nuclear fuel as well as preparation method and application thereof

A kind of nuclear fuel, inert technology, applied in the fields of reactor fuel material, nuclear engineering, nuclear power generation, etc., can solve the problem of the fault tolerance performance of pellets falling, affecting the safety of the reactor, etc., to improve the fault tolerance performance, wide application prospects, high thermal conductivity Effect

Active Publication Date: 2017-08-25
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is still a problem with SiC. Its thermal conductivity decreases rapidly under irradiation conditions, which will lead to a d

Method used

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  • ZrC inert matrix dispersed pellet nuclear fuel as well as preparation method and application thereof
  • ZrC inert matrix dispersed pellet nuclear fuel as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0056] Example 1

[0057] A method for preparing ZrC inert-based dispersed pellet nuclear fuel includes the following steps:

[0058] Step 1: Weigh each powder according to the following specifications and proportions: ZrC, 200nm, 95wt.%; 5wt% Si. Mix the above-mentioned powder with alcohol of equal quality, put it in a nylon ball mill tank, use zirconia ball as the grinding ball, ball-to-material ratio 3:1, ball mill 24h to obtain ZrC slurry. The slurry was divided into equal parts, one part was used to coat TRISO particles (different fuel cores); the other part was dried at 80°C for 24h, and sieved to obtain ZrC mixed powder.

[0059] Step 2: Coating the ZrC mixed slurry on the TRISO particles by spray deposition. Place the TRISO particles on a shaker and roll them, and apply a temperature of 70°C. The ZrC slurry prepared in step 1 is used to form a mist slurry through a spray generator, and the ZrC powder is deposited on the surface of the TRISO particles. By adjusting the ang...

Example Embodiment

[0066] Example 2

[0067] A method for preparing ZrC inert-based dispersed pellet nuclear fuel includes the following steps:

[0068] Step 1: Weigh each powder according to the following specifications and proportions: ZrC, 200nm, 95wt.%; 5wt% Si. Mix the above-mentioned powder with alcohol of equal quality, put it in a nylon ball mill tank, use zirconia ball as the grinding ball, ball-to-material ratio of 3:1, and ball mill for 24 hours to obtain ZrC slurry. The slurry was divided into equal parts, one part was used to coat TRISO particles (different fuel cores); the other part was dried at 80°C for 24h, and sieved to obtain ZrC mixed powder.

[0069] Step 2: Coating the ZrC mixed slurry on the TRISO particles by spray deposition. Place the TRISO particles on a shaker and roll them, and apply a temperature of 70°C. Using the ZrC slurry prepared in step 1, a mist slurry is formed by a spray generator, and the ZrC powder is deposited on the surface of the TRISO particles. By adjus...

Example Embodiment

[0076] Example 3

[0077] A method for preparing ZrC inert-based dispersed pellet nuclear fuel includes the following steps:

[0078] Step 1: Weigh each powder according to the following specifications and proportions: 95wt.% ZrC, 200nm; 5wt% VC. Add 1% of the total mass of the sintering aid and zirconium carbide powder as a dispersant, mix the above powder with the same mass of alcohol, and put it in a nylon ball milling tank. The grinding ball is made of zirconia balls, and the ball-to-material ratio is 3: 1. Ball mill 24h to obtain ZrC slurry. The slurry was divided into equal parts, one part was used to coat TRISO particles (different fuel cores); the other part was dried at 80°C for 24h, and sieved to obtain ZrC mixed powder.

[0079] Step 2: Coating the ZrC mixed slurry on the TRISO particles by spray deposition. Place the TRISO pellets on a shaker and roll them, and apply a temperature of 70°C. The ZrC slurry prepared in step 1 is used to form a mist slurry through a spray...

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Abstract

The invention discloses ZrC inert matrix dispersed pellet nuclear fuel as well as a preparation method and application thereof and aims at solving the problems in the prior art that since thermal conductivity of an inert matrix of dispersed nuclear fuel is reduced rapidly under the irradiation condition, fault-tolerant performance is reduced and reactor safety is influenced. The ZrC inert matrix dispersed pellet nuclear fuel comprises the inert matrix, a fuel element and a fuel-free zone protective layer, wherein the inert matrix is ZrC, and the fuel-free zone protective layer is made from ZrC. The preparation method comprises the following steps: coating ZrC mixed slurry on TRISO particles by virtue of a spray deposition process to form a compact ZrC inert matrix, carrying out mould pressing on ZrC mixed powder to form a fuel-free zone biscuit, then carrying out complex pressing on the inert matrix and the fuel-free zone biscuit to form an IMDP biscuit, then sintering the IMDP biscuit in a vacuum furnace at high temperature, cooling the furnace, and then carrying out machining on a sintered billet according to the required size, so that a fuel assembly in a water reactor and a high temperature gas cooled reactor is obtained.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel, and in particular relates to a ZrC inert base dispersed pellet nuclear fuel and its preparation method and application. Background technique [0002] Nuclear power is safe, reliable, low-carbon and clean, and will be an important part of the future global energy structure. At present, countries around the world are actively promoting the construction of nuclear power, so as to alleviate the energy crisis and improve the climate and environment. Throughout the history of nuclear energy development in the world, every nuclear accident will directly lead to a revolution in nuclear energy application technology. In the 311 Fukushima nuclear accident in Japan, the release of radioactive substances caused by the melting of fuel in the nuclear power plant and the hydrogen explosion caused by the reaction of zirconium and water in the nuclear power plant were the direct causes of the severe nuclear...

Claims

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Application Information

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IPC IPC(8): G21C3/64G21C21/02G21C21/10C04B35/56C04B35/622
CPCC04B35/5622C04B35/622G21C3/64G21C21/02G21C21/10Y02E30/30
Inventor 高瑞杨振亮李冰清贾建平唐浩刘徐徐钟毅段丽美黄奇奇王志毅
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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