Reactor single-side steel plate ultra-high performance concrete single-layer containment and its construction method

Abstract

The invention provides a one-sided steel plate ultra-high-performance concrete single-layer containment vessel, which belongs to the technical field of nuclear power engineering structures. The containment structure includes the cylinder body and the dome, both of which adopt a single inner steel plate ultra-high performance concrete structure, and a plurality of T-shaped stiffeners, studs and shear bars arranged obliquely or orthogonally are evenly fixed on the outer surface of the steel plate by welding. The T-shaped stiffener web can be solid web or empty web, and the shear reinforcement is fixed by the two-way reinforcement intersection of the straight thread anchor plate on the top and the reinforcement mesh on the outside of the containment wall. The dome considers the design of Yonglin combined with reserved holes, and the cover plate and the opening are connected and disassembled by ring flanges and high-strength bolts. The containment adopts a modular design and construction method, and the single-sided steel plate and T-shaped stiffener can replace part of the ultra-high performance concrete pouring formwork. Adopting the invention can ensure the pressure bearing and sealing requirements in the containment vessel, prevent external events and large aircraft collisions, and has remarkable engineering economy.

Description

technical field [0001] The invention relates to an ultra-high-performance concrete single-layer containment shell of one-side steel plate of a reactor 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 doub...

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Problems solved by technology

[0005] 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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