Special mounting rack and mounting method for top cover assembly of reactor of nuclear power station

Abstract

The invention discloses a special mounting rack for a top cover assembly of a reactor of a nuclear power station. The mounting rack comprises a simulation top cover and an operating platform arranged above the simulation top cover. Besides, the invention further discloses a mounting method for the top cover assembly of the reactor of the nuclear power station. The method comprises the following steps: (1) assembling the top cover assembly on the special mounting rack for the top cover assembly of the reactor of the nuclear power station offline; and (2) integrally transferring and connecting the top cover assembly on the special mounting rack to a top cover of the reactor of the nuclear power station. According to the special mounting rack and the mounting method, the assembling environment of the top cover assembly of the reactor of the nuclear power station, comprising a top cover ventilating device, an anti-vibration supporting assembly and a lifting tool, is changed, and the top cover assembly and a control rod driving mechanism can be simultaneously mounted.

Description

technical field [0001] The invention belongs to nuclear power construction and installation, and more specifically, the invention relates to a special installation stand and an installation method for reactor top cover components of a nuclear power plant. Background technique [0002] The reactor roof of a nuclear power plant is in the critical path of nuclear island installation, including many components such as control rod drive mechanism, ventilation device, anti-seismic support, roof spreader, etc. Its structure is complex, the installation cycle is long, and the installation is difficult. [0003] see figure 1 , under the existing construction plan, the top cover components on the top cover include ventilation devices, seismic support components and spreaders, etc., and the assembly is carried out online and piece by piece after the top cover is located in the nuclear island powerhouse. The construction sequence is: top The cover 1 is located in the reactor building →...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing installation method of roof components, roof ventilation devices, seismic support components and spreaders are assembled piece by piece, frequent site hoisting, low construction efficiency, and long construction period occupying critical paths increase site construction safety risks , but also not conducive to construction quality control

In addition, the above-mentioned work needs to be carried out after the installation of the control rod drive mechanism is completed, and the construction period is nearly 30 days, all of which occupy the critical path of roof installation, which is not conducive to the control of the construction period of nuclear power plants.

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