NUCLEAR REACTOR

摘要

PURPOSE:To contrive large enlargement of nuclear reactor output by equipping a plurality of reactor core vessels housing independent reactor cores in a nuclear reactor vessel and an intermediate cooler for heat-exchanging a primary coolant for a secondary coolant. CONSTITUTION:When a nuclear reactor is started, a primary coolant 26 is supplied to a reactor core vessel 31 through an inflow nozzle 36 from a high pressure plenum 29 in the lower part of a nuclear reactor vessel 25. Heating is performed due to nuclear reaction heat at the time when the coolant 26 passes reactor cores 35 in each vessel 31 and it is discharged from an outflow port 37 to an upper plenum 28. A primary coolant of high temperature guided to a plenum 28 is guided to an intermediate heat exchanger 45 from an inflow port 48 of an intermediate cooler 32 and passes through the tube bundle of the heat exchanger 45. At the time the primary coolant is heat-exchanged for the secondary coolant and cooled therewith. The secondary coolant heated with the exchanger 45 is transmitted to a steam generator 51 through an inflow and outflow tube 52 and feed water is heated.