MOX fuel cladding tube reutilization method

A cladding tube and fuel technology, which is used in fuel elements, nuclear power generation, climate sustainability, etc., to achieve the effect of improving utilization, high reliability and good treatment effect

Active Publication Date: 2020-07-17
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of MOX fuel cladding tube reuse method, to solve the cladding tube reuse problem

Method used

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  • MOX fuel cladding tube reutilization method
  • MOX fuel cladding tube reutilization method

Examples

Experimental program
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Embodiment

[0041] A method for reusing MOX fuel cladding tubes, the raw materials are MOX fuel stainless steel cladding tubes and stainless steel lower end plug assembly weldments that have failed to weld, comprising the following steps:

[0042] Step 1: Use a steel ruler to measure the original length a of the weldment of the cladding tube and the lower end plug that failed to weld, and then measure a length from the end of the lower end plug on the weldment that failed to weld the lower end plug and the cladding tube. The scope covers the welding seam and the lower end plug press-in section, and then mark it with a marker pen;

[0043] Step 2: Cut off the lower end plug from the mark by turning, and deburr the cladding tube with a triangular pyramid;

[0044] Step 3: measure the length b of the cladding tube after cutting, and calculate the length c of the end plug to be compensated, where c=a-b;

[0045] Step 4: Reprocess the lower end plug, wherein the dimensions of the lower end pl...

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Abstract

The invention relates to the technical field of nuclear fuel element preparation, and particularly discloses an MOX fuel cladding tube reutilization method which comprises the following steps: cuttingoff a lower end plug on an assembly weldment, reprocessing the lower end plug, and ensuring that the total length of the assembly weldment is not changed after the reprocessed lower end plug and thecut cladding tube are assembled and welded. The MOX fuel cladding tube after the lower end plug fails to be welded is cut, and the end plug is lengthened to ensure that the total length of the fuel rod is unchanged, so that the utilization rate of the cladding tube is increased.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel element preparation, and in particular relates to a method for reusing MOX fuel cladding tubes. Background technique [0002] The manufacture of MOX fuel rods includes multiple processes, and each process may produce defective products, especially in the welding process of the upper and lower end plugs and cladding tubes, which has the highest probability of rejects. Since cladding tubes and end plugs are special materials specially developed for structural parts of fast reactor fuel assemblies, their manufacturing technology is difficult and procurement costs are high. It is neither economical nor reasonable to scrap cladding tubes directly after welding failure of the lower end plugs. . Therefore, the cladding tube needs to be reused to avoid material waste. [0003] At present, after the welding failure of the lower end plug of the PWR nuclear fuel cladding tube, the lower end plug is ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C21/00G21C3/06
CPCG21C21/00G21C3/06Y02E30/30
Inventor 田志强张万德马绍州屠振华郭亮杨廷贵张顺孝刘家礼朱桐宇于永龙邵柳波李伟国于继美王开龙张仁全吕鲁飞那娟娟郭晓东王斌代宗凯柏宇宇刘育红张武彪陈宏伟张德军
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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