Acid dipping device used for nuclear rod jacketing tube and having function of preventing acid wash from leaking

Abstract

The invention relates to a zirconium alloy tube acid dipping device and more specifically relates to an acid dipping device used for removing surface defects and irregular faces of the inner surface of the nuclear rod jacketing tube in Pilger rolling operation. According to the invention, the function of preventing the acid wash from leaking is improved and units forming the acid dipping device can be dissolved and assembled easily and a ladder assembly is prevented from shaking. The zirconium alloy tube acid dipping device has following advantages that final product quality decrease caused by the corrosion of the surface of the nuclear rod jacketing tube because of the leakage of the acid wash can be prevented. A part of structural components of the acid dipping device can be maintained easily. And errors caused by that centers of the nozzle and the nuclear rod jacketing tube are not aligned in an acid dipping process is prevented.

Description

technical field [0001] The present invention relates to nuclear fuel rod cladding tubes used in nuclear fuel assemblies of nuclear reactors, in particular to a pickling treatment device for zirconium alloy tubes, and more particularly to a device for producing nuclear fuel rod cladding tube inner surfaces during pilgering (pilgering) operations. A pickling treatment device for nuclear fuel rod cladding tubes whose surface defects and irregularities are removed by pickling treatment. Background technique [0002] Zirconium alloy tubes are used as fuel rod claddings for nuclear reactor fuel assemblies. The chemical element symbol of zirconium is Zr, and the atomic number is 40. It is a white, strong transition metal similar to titanium. Zirconium is mainly produced from zircon and has strong corrosion resistance to circulating coolants, excellent strength at high temperatures, and is often used as a nuclear reactor material due to its small neutron absorption cross section. ...

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Problems solved by technology

[0005] On the other hand, in the pickling treatment device disclosed in the existing U.S. authorized patent No. US486334, there are the following problems due to equipment structure and technical defects: i) pickling solution leaks out and corrodes the outer surface of the pipe during pickling treatment; ii) due to The injection nozzle for injecting the pickling solution and the clamping unit for fixing the cladding tube of the nuclear fuel rod are composed of various structural components, so there is a problem that even if some structural components need maintenance, it is difficult to disassemble and assemble; iii) Acid During the cleaning process, the ladder (ladder) shakes left and right or up and down, so that the nozzles for injecting pickling liquid and the like are not aligned with the center of the nuclear fuel rod cladding tube, resulting in frequent errors during the pickling process, resulting in operation delays And other issues

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