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Nuclear fuel cladding and preparation method thereof and nuclear fuel assembly

A nuclear fuel assembly, nuclear fuel technology, applied in the field of nuclear reactors, can solve problems such as rise, nuclear fuel cladding tube rupture, nuclear leakage, etc.

Active Publication Date: 2019-06-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Under the conditions of a nuclear reactor loss of water accident, the temperature of the nuclear fuel cladding tube will rise sharply and react violently with water vapor, so the nuclear fuel cladding tube may rupture during the subsequent quenching process, resulting in nuclear leakage

Method used

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  • Nuclear fuel cladding and preparation method thereof and nuclear fuel assembly
  • Nuclear fuel cladding and preparation method thereof and nuclear fuel assembly
  • Nuclear fuel cladding and preparation method thereof and nuclear fuel assembly

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preparation example Construction

[0042] The present invention also provides a preparation method of nuclear fuel cladding, comprising the following steps:

[0043] S1, provide zirconium alloy base;

[0044] S2, forming a transition layer on the surface of the zirconium alloy substrate;

[0045] S3, forming a MAX phase layer on the surface of the transition layer;

[0046] S4, forming a sealing layer on the surface of the MAX phase layer to obtain a nuclear fuel cladding, wherein the sealing layer is a hard coating.

[0047] In step S1, it also includes removing oxides on the surface of the zirconium alloy substrate. For example, the zirconium alloy substrate is placed on the base frame in the vacuum coating chamber after ultrasonic cleaning in alcohol, and etched with Ar ion beam to remove oxides on the surface of the zirconium alloy substrate.

[0048] Specifically, the flow rate of the incoming argon gas is 25 standard ml / min to 40 standard ml / min, the linear anode ion source current is set to 0.1A to 0....

Embodiment 1

[0063] The zirconium alloy substrate was placed on the base frame in the vacuum coating chamber after ultrasonic cleaning in alcohol, and etched with Ar ion beam to remove oxides on the surface of the zirconium alloy substrate. Among them, the flow rate of the argon gas introduced is 35 standard ml / min, the linear anode ion source current is set to 0.2A, the bias voltage applied on the zirconium alloy substrate is -300V, and the etching time is 40min.

[0064] A TiC layer is deposited on the surface of a zirconium alloy substrate by arc ion plating, wherein the arc target is a titanium target, and the reactive gas is methane. During the deposition process, the base frame rotates at a position facing the arc target. The current of the arc target is 60A, the bias voltage applied on the zirconium alloy substrate is -100V, the flow rate of argon gas is 200 standard ml / min, the flow rate of methane is 50 standard ml / min, and the pressure of the control chamber is 30mtorr. The deposi...

Embodiment 2

[0076] The zirconium alloy substrate was placed on the base frame in the vacuum coating chamber after ultrasonic cleaning in alcohol, and etched with Ar ion beam to remove oxides on the surface of the zirconium alloy substrate. Among them, the flow rate of argon gas introduced was 25 standard ml / min, the linear anode ion source current was set to 0.1A, the bias voltage applied on the zirconium alloy substrate was -350V, and the etching time was 60min.

[0077] A TiC layer is deposited on the surface of a zirconium alloy substrate by arc ion plating, wherein the arc target is a titanium target, and the reactive gas is methane. During the deposition process, the base frame rotates at a position facing the arc target. The current of the arc target is 55A, the flow rate of argon gas is 200 standard ml / min, the bias voltage applied on the zirconium alloy substrate is -150V, the flow rate of methane is 50 standard ml / min, the pressure of the control chamber is 30mtorr, and the deposi...

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Abstract

The invention relates to a nuclear fuel cladding and a preparation method thereof and a nuclear fuel assembly. The nuclear fuel cladding includes a zirconium alloy substrate and a coating arranged onthe surface of the zirconium alloy substrate, and the coating includes a transition layer for laminating to the surface of the zirconium alloy substrate, and an MAX phase layer and a sealing layer which are successively arranged on the surface of the transition layer in a stacked mode, wherein the sealing layer is a hard coating. The nuclear fuel cladding has the good vapor oxidation resistant performance, and thus the accident fault freedom of the nuclear fuel cladding is effectively improved. When the nuclear fuel cladding is used for the nuclear fuel assembly, the safety can be effectivelyimproved.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a nuclear fuel cladding, a preparation method thereof, and a nuclear fuel assembly. Background technique [0002] Under the condition of a water loss accident in a nuclear reactor, the temperature of the nuclear fuel cladding tube will rise sharply and react violently with water vapor. Therefore, the nuclear fuel cladding tube may rupture during the subsequent quenching process, resulting in nuclear leakage. After the Fukushima nuclear accident in Japan in 2011, further improving the accident tolerance of nuclear fuel cladding has become a new research focus. SUMMARY OF THE INVENTION [0003] Based on this, it is necessary to address the above problems to provide a nuclear fuel cladding, a preparation method thereof, and a nuclear fuel assembly; the nuclear fuel cladding has good water vapor oxidation resistance and excellent accident tolerance. [0004] A nuclear fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23C14/06C23C14/32C23C14/35G21C3/07
CPCY02E30/30
Inventor 柯培玲李文涛汪爱英张栋王振玉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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