Intermediate heat exchanger-incorporated type steam generator

摘要

An intermediate heat exchanger-incorporated type steam generator having two functions of an intermediate heat exchanger and a steam generator and capable of simplifying a secondary cooling system. An intermediate heat exchanger tube 20 and a steam generating heat exchanger tube 22 are disposed separately in a vessel 10 storing a secondary coolant 14 therein, and a pump mechanism for forcibly circulating the secondary coolant in the vessel. The pump mechanism is made of an electromagnetic pump mechanism formed by an electromagnetic driving coil 24 provided on an outer circumference of the vessel and a magnetic core 26 attached to an inner cylinder 12 disposed in the vessel. At least one porous plate or slotted plate 18 is preferable disposed between the intermediate heat exchanger tube and steam generating heat exchanger tube.