WATER SUPPLY PIPE FOR STEAM GENERATOR

PROBLEM TO BE SOLVED: To provide a water supply pipe for a steam generator, capable of suppressing thermal stratification inside a pipe.SOLUTION: A water supply pipe for a steam generator includes: an insertion pipe 21 inserted to a through-hole 112 of an outer shell member; and an in-generator pipe 22 connected to the insertion pipe. The in-generator pipe includes: a duct; and an outflow part 25 for allowing cooling water inside the duct to flow out to a space 40 in the steam generator. The duct includes: a first inclination part 24c where not a side close to the insertion pipe but a side far from the insertion pipe in a flow direction is positioned on an upper side in a vertical direction; and a second inclination part that is positioned to be farther from the insertion pipe than the first inclination part and where not a side close to the insertion pipe but a side farther from the insertion pipe in a flow direction is positioned on a lower side in a vertical direction. In at least a partial section in a flow direction in a duct 234a between the first inclination part and the second inclination part, a lower end 234b of a cross section of the duct is positioned to be upper in a vertical direction than a horizontal surface 30 passing an upper end 21a of an inner wall surface of the insertion pipe in a connection part between the insertion pipe and the in-generator pipe.