A nuclear island drainage device

Abstract

The invention discloses a nuclear island drainage device and belongs to the field of drainage facility. The drainage device comprises a drainage perforated pipe (6) arranged at the bottom surface of an outside foundation of a nuclear island construction, wherein the pipe wall of the drainage perforated pipe (6) is provided with a plurality of water inlet holes (7); the periphery of the drainage perforated pipe (6) is provided with an inverted filter. According to the drainage device, sequential water inlets (7) are distributed in the drainage perforated pipe (6) and meanwhile the diversion effect of the inverted filter is utilized, so that infiltrated water at the periphery of a nuclear island can be collected in an organized way and is discharged in an organized way by virtue of the drainage perforated pipe (6), the nuclear island in a nuclear power plant is prevented from being eroded by groundwater, and the safety of the nuclear island is improved.

Description

technical field [0001] The invention relates to the field of surface water precipitation and drainage facilities, in particular to a nuclear island drainage device. Background technique [0002] The nuclear island is the core safety structure of the nuclear power plant, and the protection safety of the nuclear island is the lifeline of nuclear safety. The current nuclear island layout of nuclear power plants adopts semi-underground and semi-above-ground layouts, and the underground part of the nuclear island powerhouse is formed by excavating and then pouring concrete on the level of the plant floor. The excavation depth is 10-20 meters below the level of the plant floor. Duomi, after the construction of the nuclear island powerhouse is completed, the periphery of the structure will be backfilled with backfill soil. Backfill the upper floor with gravel. Under normal working conditions, the fissure water in the rock mass 2 outside the nuclear island 1 will flow to the outer...

AI Technical Summary

Problems solved by technology

However, in view of the fact that the waterproof material has a certain service life and cannot be inspected, repaired and replaced after the construction is completed, considering the 40-60-year or even longer operating cycle of the nuclear power plant, the long-term immersion and erosion of the water body will make the nuclear island 1 Concrete and steel bars will always be under the threat of water intrusion

At the same time, the water body 5 around the nuclear island 1 will also make the structure bear the influence of water pressure. The water pressure is mainly caused by lateral pressure and buoyancy. The existence of water pressure is not conducive to the seismic design of the structure.

Therefore, protecting nuclear islands by passive waterproofing measures is not enough for structures with the highest nuclear safety requirements

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