STEAM GENERATOR, AND FLOW RESISTANCE ADJUSTING METHOD FOR COOLING WATER IN STEAM GENERATOR

PROBLEM TO BE SOLVED: To suppress deterioration of heat recovery efficiency by adjusting flow resistance of primary cooling water flowing through a heat transfer tube bank in regard to a steam generator, and a flow resistance adjusting method for the cooling water in the steam generator. SOLUTION: The heat transfer tube group 38 comprised of a plurality of heat transfer tubes 37 comprising reverse U-shapes and carrying the primary cooling water is arranged in a shell 31, and an end of each heat transfer tube 37 is supported by a tube plate 33. By fixing a lower part semi-spherical mirror part 39 to a lower end of the shell 31, an inlet side water chamber 41 communicated with one end of each heat transfer tube 37 is provided, an outlet side water chamber 42 communicated with another end of each heat transfer tube 37 is provided, and two flow resistance adjusting plates 51, 52 are detachably provided as flow resistance adjusting means for the primary cooling water, on an inlet nozzle 43 provided on the inlet side water chamber 41. COPYRIGHT: (C)2007,JPO&INPIT