Structure self-rotation impact-resistant interlayer seismic isolation novel nuclear power station based on potential energy

Abstract

The invention belongs to the field of nuclear power station earthquake and impact safety, and particularly discloses a structure self-rotation impact-resistant interlayer seismic isolation novel nuclear power station based on potential energy. The structure self-rotation impact-resistant interlayer seismic isolation novel nuclear power station comprises a nuclear island lower structure, a nuclear island upper structure, an interlayer seismic isolation layer, excitation devices and nuclear equipment, the interlayer seismic isolation layer is connected between the nuclear island lower structure and the nuclear island upper structure and comprises a seismic isolation support, a roller track, a roller shaft, a roller, a spring pull rod, a brake device, an impact sensor, an air hole and a friction plate, the excitation devices are distributed on the inner wall of the nuclear island upper structure in an annular array mode, multiple layers of excitation devices are arranged up and down at equal intervals, and each excitation device comprises a bottom plate, a side plate, a pretension spring, an impact mass block and a release control system. According to the structure self-rotation impact-resistant interlayer seismic isolation novel nuclear power station based on the potential energy, a traditional structure adopts a resisting method to prevent an aircraft from being impacted and damaged, an energy conversion mode is adopted to prevent the aircraft from being impacted and damaged, meanwhile, the impact direction represented by the aircraft is deflected through rotation, and transmission of impact energy to the structure is reduced.

Description

technical field [0001] The invention relates to the field of earthquake and shock safety of nuclear power plants, in particular to a novel nuclear power plant with potential energy-based structural rotation, shock resistance, and layer isolation. Background technique [0002] Nuclear power generation is one of the clean, efficient and environmentally friendly energy sources, and it is also a key development direction of green energy in my country. my country's 2021 "Government Work Report" mentioned "actively and orderly develop nuclear power under the premise of ensuring safety." "Ensuring safety" is the premise of "active and orderly", mainly because nuclear power plant accidents will cause serious and long-term environmental pollution, major economic losses, and even serious social problems. Obviously, the safety of nuclear power plants is a key issue in nuclear power generation. [0003] The safety of nuclear power plants has always been the focus of the development of...

AI Technical Summary

Problems solved by technology

However, because the BIS nuclear power plant is facing key problems: ①The BIS structure is sensitive to sliding-type, pulse-type near-site, long-period earthquakes, and there is a risk of structural shock absorption failure under such earthquakes; ②Seismic isolation bearings have large seismic displacements, The risk of fracture of the connecting pipe between the isolated part and the non-isolated part is increased, and there is a hidden danger of nuclear safety function failure; ③ The BIS structure amplifies the seismic response of the long-period structure and fluid sloshing mode, and increases the nuclear key equipment, such as pressure Vessels and piping systems, etc., earthquake damage risk; therefore, the nuclear industry has adopted a cautious approach to BIS nuclear power plants

However, there is still a lack of in-depth research on the problem ③

However, under the action of direct impact load, the seismic isolation structure will produce large deformation or displacement, resulting in an accident in the nuclear power plant.

[0007] The floor isolation support of the general floor isolation structure has a small stiffness, which leads to poor resistance to aircraft impact, and cannot meet the basic safety requirements of nuclear power plants to prevent aircraft collision accidents; at the same time, there is a new layer isolation-rotation shock-resistant nuclear power plant structure, which relies on the aircraft's The eccentricity that exists when the impact acts on the upper structure of the nuclear island converts the impact energy into the rotational kinetic energy of the upper structure of the nuclear island

However, due to the randomness of the impact of the aircraft, when the impact of the aircraft acts on the upper structure of the nuclear island, the eccentricity of the structure itself is small, and the efficiency of the structure converting the impact energy into the rotational kinetic energy of the upper structure of the nuclear island is low

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