CONSTRUCTION LAYOUT OF UNDERGROUND NUCLEAR POWER STATION NUCLEAR ISLAND PLANT UNDERGROUND CAVERN GROUP BEING PERPENDICULAR TO MOUNTAIN DEPTH DIRECTION

摘要

A construction layout of an underground nuclear power station nuclear island plant underground cavern group being perpendicular to the mountain depth direction, comprising nuclear reactor plant caverns (1), two combined caverns, two electrical plant caverns (2), two pressure releasing caverns (7), a branch traffic tunnel (13), a side traffic tunnel (14), a first main traffic tunnel (8), a second main traffic tunnel (9) and a third main traffic tunnel (10); both the first main traffic tunnel, the second main traffic tunnel and the third main traffic tunnel communicate with the earth surface; the nuclear reactor plant caverns, the combined caverns, the electrical plant caverns and the pressure releasing caverns form a nuclear island plant cavern group; the top arch foot or top arch end wall of each cavern in the nuclear island plant cavern group communicates with the earth surface via a top layer branching tunnel system; and the bottoms of the side walls of each cavern in the nuclear island plant cavern group are connected to the first main traffic tunnel, the second main traffic tunnel and the third main traffic tunnel via a bottom layer branching tunnel system. The construction arrangement has short distance, good safety and high degree of modularization, is convenient to construct, and saves investment.