Field disassembling and assembling process of upper reactor internal control rod guide cylinders

Abstract

The invention belongs to the technical field of pressurized water reactor nuclear power station reactor upper reactor internal control rod guide cylinder assemblies and specifically relates to a fielddisassembling and assembling process of upper reactor internal control rod guide cylinders in order to overcome the physical condition restrictions. According to the field disassembling and assembling process of the upper reactor internal control rod guide cylinders, provided by the invention, related tools are used in cooperation to disassemble and assemble the guide cylinders in the designatedpositions of upper reactor internals. The field disassembling and assembling process is characterized by comprising the steps of dismantling of guide cylinder fastening bolts, dismantling of the upperguide cylinder, dismantling of the lower guide cylinder, reinstallation of the lower guide cylinder, reinstallation of the upper guide cylinder and installation of the guide cylinder fastening bolts.Through the field disassembling and assembling process, the upper and lower guide cylinders in the designated positions of the upper reactor internals can be effectively disassembled and assembled onsite during the establishing, installation and debugging period of a pressurized water reactor nuclear power unit, supporting pins can be disassembled and assembled more reliably, stably and accurately, the disassembling and assembling quality can be ensured, and damage to equipment can be avoided. The field disassembling and assembling process is also applicable to the manufacturer equipment assembly stage.

Description

technical field [0001] The invention belongs to the technical field of a control rod guide cylinder assembly of an upper internal component of a pressurized water reactor nuclear power plant, and in particular relates to an on-site disassembly process for a control rod guide cylinder of an upper internal component. Background technique [0002] Dozens of sets of upper and lower control rod guide cylinders (hereinafter referred to as guide cylinders) components are usually installed in the upper reactor internals of the pressurized water reactor nuclear power plant. As shown in the installation instructions figure 1 As shown, the middle of the upper and lower guide cylinders is fixed to the upper support plate by flanges and four fastening bolts, and the lower ones interfere with the pin holes on the upper core plate through two open support pins on the bottom flange of the lower guide cylinder. The assembly is positioned and the interference is large. This interference fit...

AI Technical Summary

Problems solved by technology

At this time, if the above-mentioned factory process is followed, there are problems such as limited operating space and inaccessibility of personnel at the upper support plate.

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