VERTICAL PRESSURE TUBE NUCLEAR REACTOR

PURPOSE:To simplify the core internal structure by providing an extended tube part of a pressure tube aggregate protruded in the upper and the lower parts of a calandria tank, and an inlet tank and an outlet tank on the upper and the lower parts of the calandria tank, and connecting directly the extended tube part of the pressure tube aggregate, and the inlet tank and the outlet tank. CONSTITUTION:An inlet tank 3 and an outlet tank 4 are provided on the upper and the lower parts of a calandria tank 2 for containing a pressure tube 1. The lower extended part of the pressure tube 1 is connected directly to the inlet tank 3, and the upper extended part of the pressure tube is connected directly to the outlet tank 4. In such a way, a complicated piping group of an inlet tubes and an outlet tubes are eliminated, a core internal structure is simplified, the number of connecting parts formed by welding the pipings is decreased, and the manufacturing cost can be reduced.