Method for hoisting and transporting assemblies in underground nuclear power plant

A method for hoisting and transporting assemblies in an underground nuclear power plant, the method comprising:

• 1) pouring concrete onto a reactor cavern to form a rock anchor beam;
• hoisting a circular bridge crane to the reactor cavern through a hoist shaft on a top of the reactor cavern;
• mounting the circular bridge crane on the rock anchor beam by using a truck crane;
• 2) installing a containment cylinder and a track beam of a polar crane in the reactor cavern using the circular bridge crane;
• hoisting a gantry crane on one end of a polar crane girder and sending the polar crane girder through the hoist shaft to the reactor cavern;
• hoisting the other end of the polar crane girder using the circular bridge crane;
• allowing the polar crane girder to be horizontal under a combined effect of the gantry crane and the circular bridge crane;
• and mounting the polar crane girder on the track beam;
• 3) employing the track beam and the polar crane girder as supporting points of an assembly jig of a steel lining on a containment dome, and hoisting processed pieces of the steel lining to the reactor cavern through the hoist shaft;
• soldering and assembling the pieces on the assembly jig;
• and
• 4) transporting permanent equipment from a nuclear reactor to the containment cylinder through a transport corridor which is connected to the reactor cavern;
• and turning over the permanent equipment and hoisting the permanent equipment to working areas using the polar crane girder.