| 摘要 |
To provide a tube support plate (200) disposed in a steam generator, in which the pressure loss is reduced and which has a sufficient strength. A large number of through holes (100) for passing heat conduction tubes (210) therethrough are formed in the tube support plate (200). The through holes (100) are formed in a hexagonal shape. Projecting parts (100a, 100b, 100c) are formed on the alternate sides (102, 104, 106) of the sides forming the hexagonal shape. The through holes (100) are arranged in a honeycomb pattern. Consequently, the strength of the tube support plate can be kept while reducing the pressure loss by increasing the area of the opening of each through hole (100).
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