A dry reactor containment vessel and a nuclear power plant equipped with the reactor containment vessel.

摘要

PROBLEM TO BE SOLVED: To suppress a pressure in a dry reactor containment vessel without using a pressure suppression chamber. SOLUTION: A dry reactor storage vessel 4 for accommodating a reactor pressure vessel 1 including a core 2 includes a support member (reactor pressure vessel support skirt 8) for installing the reactor pressure vessel and a reactor. A plurality of pipes (main steam pipe 15, water supply pipe 16, drain pipe 31) connected to the pressure vessel are provided inside. The inside of the reactor containment vessel is divided into an upper drywell 6 on the upper side and a lower drywell 7 on the lower side by a support member and a structure arranged inside the reactor containment vessel. A communication hole 13 for connecting the upper dry well and the lower dry well is provided between the upper dry well and the lower dry well. Of the plurality of pipes, all pipes (main steam pipe 15, water supply pipe 16) having a nominal diameter larger than 2 inches (about 5 cm) are connected to the reactor pressure vessel above the support member. .. [Selection diagram] Fig. 1