Method for processing thin-walled tube of zirconium alloy specially used by nuclear reactor

Abstract

The invention relates to a method for processing a thin-walled tube of zirconium alloy specially used by nuclear reactor with the specification of Phi 12.8 multiplied by 0.25mm. The adopted technical scheme is characterized by comprising the following steps: selecting and using a zircaloy tube (1) with a certain length of Phi 44.5 multiplied by 7.65 mm, then conducting the steps such as cold rolling, primary intermediate annealing, primary acid cleaning, second pass cold rolling, secondary intermediate annealing, secondary acid cleaning, final cold rolling, final annealing, straightening and then polishing, acid cleaning and complexing treatment, detection and then cutting constant length, and the like on the zircaloy tube, and finally completing the process of the thin walled tube of zirconium alloy specially used by the nuclear reactor. The thin-walled tube of zirconium alloy specially used by the nuclear reactor which is processed by the method reaches the requirement of the required machining accuracy, meets the operating requirement of the nuclear reactor, and changes the unfavorable situation that in China, the thin-walled tube of zirconium alloy specially used by the nuclear reactor, which has the specification and the machining accuracy, depends on import.

Description

technical field [0001] The invention relates to the field of a method for manufacturing a special zirconium alloy thin-walled pipe with a specification of Φ12.8×0.25mm for nuclear reactors, in particular to the field of special zirconium alloy thin-walled pipes for manufacturing grid ring pipes in nuclear reactor fuel assemblies. Background technique [0002] At present, when assembling nuclear fuel rods in a nuclear reactor, it is necessary to assemble and weld components such as tube sockets, control rods, and guide tubes into a fuel assembly grid, and then pull the fuel rods into the grid to become a finished fuel assembly. The fixing and positioning of the reactor are very important to ensure the precise operation and safe operation of the reactor. Generally, the grid ring tube is used for the fixing and positioning of the fuel rods. The special zirconium alloy thin-walled tube with a specification of Φ12.8×0.25mm can be used to make it A lattice ring pipe, the specific ...

AI Technical Summary

Problems solved by technology

However, at present, the existing domestic thin-walled pipe manufacturing technology has low precision, and it is difficult to meet the processing accuracy requirements of the zirconium alloy thin-walled pipes of the above specifications required by nuclear reactors. Still depends on importing

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