REACTOR BUILDING

PROBLEM TO BE SOLVED: To provide a structure of a reactor building which enables reduction in the physical quantities of a framework and which is highly economical. SOLUTION: A communication tube 10 allows a spent fuel pool 2 in the reactor building 9 to communicate with a pool 1 inside a static containment vessel cooling system. The communication tube 10 is positioned at the height, which can secure a depth 12 of water required for the shielding from radiation above a fuel storage rack 13. The pool 1 in the static containment vessel cooling system filled with less water is replenished with pool water in the spent fuel pool 2 by way of the communication tube 10, by operating a heat exchanger 3 in the static containment vessel cooling system in the pool 1, in the static containment vessel cooling system. The replenishment can be stopped at a water level which can secure the depth 12 of water required for the shielding from radiation above the fuel storage rack 13. COPYRIGHT: (C)2005,JPO&NCIPI