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Zirconium alloy pellet-cladding tube and preparation method thereof

A zirconium alloy tube and cladding tube technology, which is applied in metal material coating process, gaseous chemical plating, reactor fuel elements, etc., can solve the problem that the inner wall coating of zirconium alloy cladding tube and the zirconium alloy cladding cannot be realized. In order to improve safety and economy, and improve the effect of anti-PCI

Active Publication Date: 2019-12-06
STATE POWER INVESTMENT CORP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent cannot realize the preparation of the inner wall coating of the zirconium alloy cladding tube with a large aspect ratio
[0006] In summary, the existing zirconium alloy cladding tube and its preparation method still need to be improved

Method used

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  • Zirconium alloy pellet-cladding tube and preparation method thereof
  • Zirconium alloy pellet-cladding tube and preparation method thereof
  • Zirconium alloy pellet-cladding tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The zirconium alloy tube body (Φ9.5mm, thickness 0.57mm, length 200mm zirconium alloy tube) is mechanically ground and polished, and the zirconium alloy tube body is firstly polished with 80-mesh to 5000-mesh sandpaper, and then polished to remove the surface Defects, then ultrasonically cleaned in acetone and deionized water for 10 minutes, and dried at low temperature.

[0073] After the graphene and YSZ were mixed and ground, they were added to a mixed solvent of absolute ethanol and acetone 1:1 (v / v) at a concentration of 15g / L, and ultrasonically dispersed to obtain a stable suspension system and a mixed solution.

[0074] The zirconium alloy tube is used as the cathode, and the graphite rod is used as the anode. The graphite rod and the metal tube are coaxially sealed through a tee joint and a rubber gasket. Stable circulation in the cathode tube ensures that the change in the concentration of the reaction liquid is as small as possible during the flow, that is, t...

Embodiment 2

[0076] The zirconium alloy tube body (Φ9.5mm, thickness 0.57mm, length 200mm zirconium alloy tube) is mechanically ground and polished, and the zirconium alloy tube body is firstly polished with 80-mesh to 5000-mesh sandpaper, and then polished to remove the surface Defects, then ultrasonically cleaned in acetone and deionized water for 10 minutes, and dried at low temperature.

[0077] After the graphene and YSZ are mixed and ground, they are added to a mixed solvent of absolute ethanol and acetone 1:1 (v / v) according to the concentration of 20g / L, ultrasonically dispersed to obtain a stable suspension system, and a mixed solution is obtained.

[0078] The zirconium alloy tube is used as the cathode, and the graphite rod is used as the anode. The graphite rod and the metal tube are coaxially sealed through a tee joint and a rubber gasket. Stable circulation in the cathode tube ensures that the change in the concentration of the reaction liquid is as small as possible during t...

Embodiment 3

[0080] The zirconium alloy tube body (Φ9.5mm, thickness 0.57mm, length 200mm zirconium alloy tube) is mechanically ground and polished, and the zirconium alloy tube body is firstly polished with 80-mesh to 5000-mesh sandpaper, and then polished to remove the surface Defects, then ultrasonically cleaned in acetone and deionized water for 10 minutes, and dried at low temperature.

[0081] After graphene oxide and YSZ are mixed and ground, according to the concentration of 10g / L, join in the mixed solvent of dehydrated alcohol and acetone 1:1 (v / v), and add 0.3g / L I 2 , ultrasonic dispersion to obtain a stable suspension system and a mixed liquid.

[0082] The zirconium alloy tube is used as the cathode, and the graphite rod is used as the anode. The graphite rod and the metal tube are coaxially sealed through a tee joint and a rubber gasket. Stable circulation in the cathode tube ensures that the change in the concentration of the reaction liquid is as small as possible during ...

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Abstract

The invention discloses a zirconium alloy pellet-cladding tube and a preparation method thereof. The zirconium alloy pellet-cladding tube comprises a zirconium alloy tube and a composite protection layer, wherein the composite protection layer is formed on at least a part of the surface of the inner wall of the zirconium alloy tube; and the composite protection layer comprises a graphene materialand a zirconium material. Due to adoption of the composite protection layer of the graphene material and the zirconium material on the inner wall of the zirconium alloy pellet-cladding tube, the anti-PCI (pellet cladding interaction) of a pellet cladding shell and a core block can be effectively improved, iodine-induced stress corrosion cracking can be alleviated, and meanwhile, the wearing resistance of the pellet cladding shell can be improved.

Description

technical field [0001] The invention relates to the technical field of surface strengthening, in particular, the invention relates to a zirconium alloy cladding tube and a preparation method thereof. Background technique [0002] The zirconium alloy cladding tube is the first line of defense for reactor safety and the first protective barrier against radioactive leakage, so it requires high reliability during the entire use process. In the active pressurized water reactor nuclear power plant, as the reactor power increases, the temperature of the fuel pellets increases, which causes the pellets to expand and strain with the zirconium alloy cladding (PCI, Pellet-Cladding interaction), resulting in stress corrosion cracking (SCC , Stress Corrosion Cracking), the inner wall of the cladding tube is in contact with the fission products (I, Cs) in the fuel rod, which will cause the problem of iodine-induced stress corrosion cracking (ISCC, Iodine Induced Stress Corrosion Cracking)...

Claims

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Application Information

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IPC IPC(8): G21C3/07G21C3/04C23C16/26C23C16/40C25D9/04
CPCC23C16/26C23C16/405C25D9/04G21C3/04G21C3/07Y02E30/30
Inventor 刘艳红李怀林王晓婧郑明珉夏海鸿
Owner STATE POWER INVESTMENT CORP RES INST
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