Construction layout of underground nuclear power station combination grotto group along depth direction of mountain body

Abstract

The invention discloses a construction layout of an underground nuclear power station combination grotto group along the depth direction of a mountain body. The construction layout comprises a nuclear reactor workshop grotto, two combination grottos, two electric workshop grottos, two pressure relief grottos, a first main access tunnel, a second main access tunnel and a third main access tunnel, wherein the first main access tunnel, the second main access tunnel and the third main access tunnel are all communicated with the earth surface, the nuclear reactor workshop grotto, the combination grottos, the electric workshop grottos and the pressure relief grottos form a nuclear island workshop grotto group, crown arch springings or crown headwalls of the grottos of the nuclear island workshop grotto group are communicated with the earth surface through a top layer adit system, and side wall bottoms of the grottos of the nuclear island workshop grotto group are connected with the first main access tunnel, the second main access tunnel and the third main access tunnel through a bottom layer adit system. The construction layout has the characteristics of short mileage, good safety, convenience in construction, low investment and high modularity degree, and can be widely applied to the technical field of nuclear power engineering.

Description

technical field [0001] The invention relates to the technical field of nuclear power engineering, in particular to a construction layout of a combined cavern group of an underground nuclear power plant along the depth direction of a mountain body. Background technique [0002] In my country's "Twelfth Five-Year Plan" energy plan, it is proposed to accelerate the construction of nuclear power. However, under the influence of the Fukushima nuclear accident in Japan, the global nuclear power industry, which had just emerged from the shadow of Chernobyl, fell into a trough again. In view of this, the state's examination and approval of nuclear power projects has become more stringent and prudent, and the safety requirements for nuclear power plants have also been given a higher status. In response to this situation, the new nuclear power plant layout structure in which all or part of the ground nuclear power plant is placed underground provides a new idea for the development of...

AI Technical Summary

Problems solved by technology

However, compared with the underground powerhouse caverns of hydropower stations, there are fewer permanent passages available, the local hollowing rate of the mountain is high, and nuclear power projects have a high degree of modularization requirements, so the layout of construction branch tunnels is subject to more restrictions.

[0004] If the construction branch tunnels of underground nuclear power plant caverns are improperly arranged, it is easy to affect the stability and safety of the main caverns, and at the same time cause construction inconvenience, resulting in delays in the construction period and increased investment

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