A Small Stack Shock-absorbing Floating Raft Applicable to Fully Buried Arrangement on Land

Abstract

The invention discloses a shock-absorbing floating raft device for a small stack suitable for land-based full-buried arrangement, which comprises a sealed cabin (2) for sealing the containment vessel (1) of a modular small stack inside the sealed cabin (2). In the fixed foundation (3) of the nuclear island, the modular small reactor containment vessel (1) is rigidly connected to the surroundings of the sealed cabin (2), and there is a A vibration isolation device A for shock absorption, a vibration isolation device B is provided between the side wall of the airtight cabin (2) and the side wall of the nuclear island fixed foundation (3). The beneficial effects of the present invention are: using the vibration isolation principle of mechanical equipment, the vibration isolation device is used to effectively absorb a large amount of kinetic energy generated during an earthquake, and the energy generated by the earthquake is converted into frictional heat through mechanical motion and consumed, which is a better solution Seismic waves have an impact on the vibration of the reactor, and can also reduce the impact of the reactor's own vibration during normal operation; reduce equipment cost.

Description

technical field [0001] The present invention relates to the technical field of system design of onshore modular small pile fixing devices, in particular to a small pile shock-absorbing floating raft device suitable for onshore full-buried arrangement. Background technique [0002] Modular small reactors refer to a new generation of reactors with a single reactor power of less than 300,000 kilowatts, modular design, modular manufacturing, modular transportation, rapid on-site assembly, and innovative technology. The modular small reactor has many advantages such as high safety, multi-purpose (power supply, heat supply, steam supply, seawater desalination, floating nuclear power plant, nuclear-powered merchant ship, etc.), cost-effectiveness, and flexibility. The United States and other countries have given very high evaluations to the modular small reactor, such as "the turning point of the nuclear energy industry" and "creating a new era of multi-purpose nuclear energy". Mo...

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Problems solved by technology

[0006] The existing design of the modular small reactor nuclear island is buried underground, which can effectively reduce the impact of earthquakes, but the nuclear island is rigidly connected to the foundation. When an earthquake occurs, a large amount of energy generated by seismic shear waves and longitudinal waves will act on the nuclear island. device, thereby affecting the structural safety of nuclear island equipment such as containment, pressure vessels, voltage stabilizers, and drive mechanisms

If the seismic performance of a single piece of equipment is blindly improved, the purchase price of the equipment will be greatly increased, thereby affecting the overall cost of the nuclear island of the small reactor. The overall cost of modular small stacks affects the economics of small stacks and will restrict the market promotion of modular small stacks

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