摘要:
A nuclear reactor vessel structure includes an inner peripheral tube-shaped steel plate (4), an outer peripheral tube-shaped steel plate (6), and an intermediate tube-shaped steel plate (5) disposed between the inner and outer peripheral tube-shaped steel plates (4, 6), and is configured to support a nuclear reactor vessel (3) on the inner peripheral side of a tube-shaped structure (2) with concrete (C1, C2) placed between the steel plates. The nuclear reactor vessel structure (1) includes a support (14) having a tube-shaped plate (12) disposed on the inner peripheral side of the intermediate tube-shaped steel plate (5), and an annular plate (13) which protrudes to the inner peripheral side of the tube-shaped plate (12) and to which a radial support key (connection section) (7) connected to the nuclear reactor vessel (3) is affixed. The support (14) is affixed to the concrete (C1), which is placed between the inner peripheral tube-shaped steel plate (4) and the intermediate tube-shaped steel plate (5), by foundation bolts (first bar members) (15) extending in the vertical direction, and the support (14) is also affixed to the inner peripheral tube-shaped steel plate (4) by anchor bolts (second bar members) (16) extending in the radial direction of the tube-shaped structure (2).
摘要:
A flanged hollow structure capable of increasing a structural integrity by preventing cracking due to thermal fatigue from occurring around a flange, comprising the annular flange fixed to the outer peripheral surface thereof causing a temperature difference in the direction of plate thickness thereof, wherein the annular flange is characterized in that a metal material having a linear expansion coefficient larger than the linear expansion coefficient of the metal material around the inner edge of the annular flange is provided along the outer edge of the annular flange.