Reactor single-layer safety shell and construction method thereof

Abstract

The invention provides a reactor single-layer safety shell and belongs to the technical field of nuclear power engineering structures. The safety shell structure comprises a cylinder body and a dome.Single inner side steel plate concrete or single side steel plate ultrahigh-performance concrete structures are adopted in the cylinder body and the dome. Multiple heterotropic or orthographic T-shaped stiffening ribs, studs and smooth-surface shear-resisting ribs are arranged on the outer surfaces of steel plates, wherein the heterotropic or orthographic T-shaped stiffening ribs have shear-resisting mono-directional non-pulling-resistance characteristic, and the smooth-surface shear-resisting ribs are provided with straight thread anchor plates. Foam materials with the calculated thickness are bonded to rib plate flanges, stud caps and top faces of the shear-resisting anchor plates. Rib plates, the studs and the side faces of the shear-resisting ribs are coated with thin layers of grease-like materials correspondingly. The permanent and temporary combination with reserved hole design is considered in the dome, and a cover plate and a hole are connected and disconnected through a ring-shaped flange and a high-strength bolt. A modular design building method is adopted in the safety shell. The single-side steel plates and the stiffening ribs can replace some concrete pouring formworks. By the adoption of the safety shell, the requirements for pressure bearing and sealing in the safety shell can be ensured, external events and large aircraft impact can be prevented, and the safetyshell has remarkable project economy.

Description

technical field [0001] The invention relates to a reactor single-layer containment vessel and a construction method thereof, belonging to the technical field of nuclear power structure engineering. Background technique [0002] The containment is an extremely important structure in a nuclear power plant. Reactors, pressure vessels, evaporators, and safety-grade piping are all in the containment, which belongs to the third safety barrier of nuclear power plants. The containment is a structure related to nuclear safety, and it belongs to the anti-seismic Class I component. It must consider the temperature rise and pressure bearing and sealing performance under the internal pressure of the primary circuit accident conditions in the containment, and also consider the resistance to large commercial aircraft impacts and other external events. effect. [0003] Commonly used nuclear power plant containment shells are double-layer shell structures. The inner shell is made of pure st...

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Problems solved by technology

[0004] At the same time, due to the large number of nuclear power equipment and the arrival time is often inconsistent, and the installation of equipment during the construction period has high requirements for the internal environment, it must meet the requirements of the temporary sealing of the containment and the clean area in the shell, and the follow-up large equipment also exists within the service life. Repair and Replacement Issues

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