STEAM TURBINE CASING, STEAM TURBINE INCLUDING THE STEAM TURBINE CASING, NUCLEAR POWER PLANT INCLUDING THE STEAM TURBINE, AND METHOD FOR ASSEMBLING THE STEAM TURBINE CASING

摘要

PROBLEM TO BE SOLVED: To provide a steam turbine casing achieving high accuracy assembling of an inner casing by suppressing deformation of the mating surface of an inner casing lower half portion.;SOLUTION: This steam turbine casing includes: the inner casing storing a turbine rotor and having an inner casing upper half portion and the inner casing lower half portion 16; and an outer casing storing the inner casing and having an outer casing upper half portion and an outer casing lower half portion 4. The self-weight of the outer casing lower half portion 4 is supported in such a manner that outer casing fixing portions 22 provided on both sides are arranged on a base 50, and the self-weight of the inner casing lower half portion 16 is supported in such a manner that inner casing fixing portions 21 provided on both sides are arranged on the outer casing fixing portions 22. Displacement suppressing mechanisms 21a, 22a for suppressing displacement of the inner casing fixing portions 21 to the inner side of the inner casing with respect to the outer casing fixing portions 22 are provided between the outer casing fixing portions 22 and the inner casing fixing portions 21 provided on the outer casing fixing portions 22.;COPYRIGHT: (C)2011,JPO&INPIT