HIGH PRESSURE CORE INJECTION SYSTEM

PROBLEM TO BE SOLVED: To provide a high pressure core injection system capable of avoiding function loss of a cooling system during reactor isolation even if an underground floor of a nuclear reactor building is submerged.SOLUTION: A high pressure core injection system 50 includes a first force feed portion 10 which force-feeds the water held in a condensate storage tank 56 or suppression pool 55 into the nuclear reactor pressure container 51, and a second force feed portion 20 which force-feeds the water held in an equipment storage pool 57 into the nuclear reactor pressure container 51.